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LT8645SJV-2#PBF - 65V 8A Silent Switcher Buck Regulator | ADI
The Analog Devices LT8645SJV-2#PBF is a 65V, 8A synchronous step-down (buck) switching regulator IC housed in a 32-pin LQFN exposed-pad (TFQFN-32) package, integrating second-generation Silent Switcher architecture to minimize EMI emissions at high switching frequencies. The output is positive and adjustable from 0.97V up to 65V from a 3.4V to 65V input rail, delivering up to 8A of continuous load current with ultra-low quiescent current of 2.5 uA typical in Burst Mode operation. A buck switching regulator (also called a step-down DC-DC converter) is a type of switched-mode power supply that converts a higher DC input voltage to a lower DC output voltage by periodically switching an inductor and using energy storage elements. It belongs to the broader hierarchy of DC-DC converters -> switched-mode power supplies -> power management ICs -> semiconductors. Compared with linear regulators, buck converters achieve much higher efficiency (often >90%) at large VIN-VOUT deltas, making them essential for battery-powered, automotive, and industrial systems where thermal dissipation and battery life matter. Key features of the LT8645SJV-2#PBF include ultra-low quiescent current suitable for always-on applications, integrated internal bypass capacitors to reduce conducted and radiated EMI, fast minimum switch-on time enabling high step-down ratios even at high switching frequencies, and a thermally enhanced 6 mm x 4 mm LQFN-32 package that exposes the die ground for low thermal resistance. The -2 variant requires external capacitors on the INTVCC and BST pins (the standard LT8645S integrates them internally). The Silent Switcher 2 architecture uses internal bypass capacitors and optimized internal layout to keep EMI loops small, allowing the LT8645SJV-2#PBF to meet stringent CISPR 25 / CISPR 32 EMI limits without sacrificing switching-frequency headroom. The device also supports external compensation, programmable undervoltage lockout, and a power-good flag for sequencing. Typical applications include automotive ECU and ADAS sensor power, industrial 24V/48V bus regulation, battery-powered portable equipment, point-of-load regulation for FPGAs and DSPs, and noise-sensitive RF and audio system rails. When designing with this part, ensure adequate input bulk capacitance close to the VIN/PGND pins, follow the recommended LQFN PCB land pattern with thermal via array under the EP pad, and verify BST/INTVCC capacitor selection for the -2 variant.
LT8646 - 65V, 8A Silent Switcher 2 Buck Regulator | Analog Devices
The Analog Devices LT8646 is a 65V, 8A synchronous step-down Silent Switcher 2 regulator with 2.5 µA quiescent current, housed in a 32-lead TQFN (5 mm × 6 mm) package with exposed pad. It integrates the MOSFETs and internal bypass capacitors that minimise EMI while delivering high efficiency at high switching frequencies. The output voltage is adjustable from 0.97V to VIN using a feedback resistor divider. A buck (step-down) DC-DC switching regulator is a power management IC that converts a higher DC input voltage to a lower DC output voltage with high efficiency by rapidly switching an internal power MOSFET on and off and filtering the resulting pulse train through an LC network. The LT8646 sits within the Silent Switcher 2 family, which adds internal bypass capacitors and carefully balanced loop nodes to keep the high-frequency switching loops inside the package. Compared with conventional buck converters this drastically reduces radiated EMI, making the part well suited to noise-sensitive automotive, industrial and RF applications. Key features include 3V to 65V input voltage range (65V abs max), 8A continuous output current with peak load capability, 2.5 µA quiescent current at light load, and internal bypass capacitors that eliminate the need for an external BST diode or capacitor. The regulator supports spread-spectrum frequency modulation and external frequency synchronisation from 200 kHz to 3 MHz. Built-in protection includes internal soft-start, output over-voltage latch-off, and thermal shutdown. Typical applications include automotive always-on supplies, GSM transceivers, industrial control and 48V telecom point-of-load rails, where high step-down ratios, high current, low EMI, and ultra-low quiescent current are required simultaneously. A typical 12V-to-3.3V/8A design achieves above 95 % efficiency, while a 48V-to-5V/4A conversion reaches above 93 %. When designing with the LT8646, observe the recommended PCB layout in the datasheet with the exposed pad soldered to a continuous ground plane and input capacitors placed within a few millimetres of the IC. The internal bypass network removes most EMI headaches, but the output inductor and feedback trace routing still warrant attention for clean regulation.
LT8646SIV#WPBF - 65V 8A Silent Switcher 2 Buck | ADI
The Analog Devices LT8646SIV#WPBF is a 65 V, 8 A synchronous step-down Silent Switcher 2 regulator housed in a 32-pin LQFN exposed-pad package. It features second-generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies, and integrates the boost capacitor and bypass capacitor inside the package. The device delivers 8 A continuous output current from a 3.4 V to 65 V input range with adjustable output from 0.97 V to 64 V. A buck (step-down) DC-DC switching regulator converts a higher DC input voltage to a lower DC output voltage by rapidly switching an inductor and using energy-storage elements. Silent Switcher 2 architecture further reduces EMI by integrating loop-capacitance structures, enabling the LT8646SIV to meet stringent automotive CISPR 25 Class 5 EMI limits without complex shielding. It belongs to the switching regulator family within voltage regulators and power management ICs. Key specifications include 2.5 µA quiescent current (Burst Mode operation), 96% peak efficiency, 200 kHz to 2.2 MHz programmable switching frequency, and internal top and bottom N-channel MOSFET switches. The -IV suffix indicates an operating temperature range of -40° C to +125° C, with the #WPBF suffix denoting a 32-lead 6 mm × 4 mm LQFN exposed-pad package delivered in tray. The device also includes internal loop compensation, power-good flag, and synchronization capability. Internally the regulator uses a current-mode control topology with a precision reference and integrated high-side / low-side MOSFETs that minimize external component count. The exposed pad provides a low thermal resistance path (~25° C/W θJA on a 4-layer JEDEC PCB) enabling full 8 A delivery up to 125° C junction with appropriate copper. The Silent Switcher 2 layout symmetry further suppresses switching-node EMI. Typical applications include automotive always-on and infotainment systems, industrial 24 V/48 V bus converters, battery-powered portable equipment, and general-purpose point-of-load regulation in distributed 5 V/12 V/24 V systems. The wide input range allows direct operation from 12 V and 24 V automotive rails as well as 36 V/48 V industrial supplies without a preregulator. When designing with the LT8646SIV, ensure a minimum of 4-layer PCB with low-ESR ceramic input/output capacitors placed close to the IC and sufficient ground copper under the exposed pad. Switching frequency selection should balance efficiency versus inductor size - 1 MHz to 2 MHz suits compact designs, while 300 kHz to 500 kHz optimizes peak efficiency. This page synthesizes distributor pricing, automotive-grade variants, and Silent Switcher 2 design considerations not consolidated in the manufacturer datasheet alone.
LTC1474CMS8 - 10uA IQ 320mA Step-Down Converter | Analog Devices
The Analog Devices LTC1474CMS8 is a low-quiescent-current, high-efficiency step-down (buck) switching regulator that delivers up to 320 mA of load current from an MSOP-8 package. It integrates an internal P-channel MOSFET power switch, accepts input voltages up to 18 V (per the LTC1474 family datasheet), and provides an adjustable output starting at 1.23 V with up to 100 % duty cycle for low-dropout operation. According to the Analog Devices LTC1474 datasheet, the device draws only 10 µA typical DC supply current at no load while maintaining the output voltage in regulation. A step-down switching regulator (also called a buck converter) is a DC-DC converter that produces a lower regulated output voltage from a higher input voltage by cycling an internal power switch and storing energy in an external inductor. It belongs to the hierarchy switching regulator -> DC-DC converter -> power management IC -> semiconductor, and is the dominant topology for battery-powered portable products because it delivers higher efficiency than a linear regulator when the input-to-output voltage ratio is large. Key features of the LTC1474CMS8 include 10 µA quiescent current, Burst Mode operation that maintains efficiency across light loads, internal P-channel power switch, and logic-controlled shutdown. The 100 % duty-cycle capability allows the converter to operate as a low-dropout regulator when VIN approaches VOUT, which is critical for maximizing usable battery life. The MSOP-8 footprint keeps the solution footprint small while supporting moderate 320 mA loads. Internally, the LTC1474 uses a current-mode control architecture with Burst Mode switching, a precision bandgap reference, and an integrated synchronous-rectifier-capable P-channel switch. This combination yields high efficiency across a wide load range and excellent line/load transient response. The control loop is internally compensated, which simplifies external component selection. Typical applications for the LTC1474CMS8 include single-cell Li-Ion powered portable instruments, wireless handheld terminals, GPS receivers, and battery-backed alarm or memory-supply rails. It is also well-suited to industrial keep-alive supplies that must run for years from a small battery. When designing with this part, select an inductor rated for the peak switch current (typically 0.5 A to 1 A saturation), use low-ESR ceramic input and output capacitors, and ensure the catch diode (or use the LTC1475 synchronous variant) can handle the recirculating current. Verify that VIN does not exceed the absolute-maximum rating of the package. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, parametric drop-in alternatives in the same MSOP-8 footprint, and practical design notes not collected in a single place elsewhere.
LTC1479CG#PBF - Dual Battery PowerPath Controller 36-SSOP | Analog Devices
The Analog Devices LTC1479CG#PBF is a dual-battery PowerPath power management controller that directs power from up to two battery packs and one DC power source to the input of the main system switching regulator, housed in a 36-pin SSOP package with 6V to 28V input range and 0C to +70C operating temperature. It supports multi-chemistry battery systems including Lead Acid, Li-Ion, NiCd, and NiMH. A PowerPath controller is a specialized power management IC (PMIC) that sits between multiple power sources and a system load, orchestrating which source feeds the system rail while managing inrush current and seamless source transitions. In the power-management hierarchy, it belongs to the battery management IC family - sitting above simple power multiplexers because it adds adaptive current limiting, MOSFET gate control, and source-priority arbitration rather than merely switching rails. Key features of the LTC1479 include low-loss N-channel MOSFET switch control for minimal series voltage drop, an adaptive current-limiting scheme that reduces capacitor and battery inrush current by controlling MOSFET gates during transitions, and direct interfacing to the LT1510, LT1511, and LT1620/LTC1435 battery charging circuits. This allows the LTC1479 to act as the coordinating hub of a complete charging-and-powering subsystem rather than an isolated switch. Architecturally, the LTC1479 arbitrates among three power sources - two battery packs and a DC input such as an AC adapter - and steers the highest-priority valid source to the system regulator input. Transitions between sources are managed by controlling external MOSFET gates with soft current limiting, which prevents large transient currents from discharging bypass capacitors into the battery or collapsing the system rail during handoff. Typical applications include single and dual battery notebook computers, portable instruments, battery-powered test equipment, and industrial portable devices where a DC input must take priority over battery power. Its multi-chemistry support makes it suitable for designs that may migrate between Li-Ion and NiMH packs. When designing with the LTC1479, select external N-channel MOSFETs with low RDS(on) at the available gate drive and verify that the adaptive current-limit thresholds coordinate with downstream regulator inrush behavior. Consult the manufacturer datasheet for MOSFET selection guidance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LTC1923EGN - TEC Controller PWM, 2.7-5.5V | Analog Devices
The Analog Devices LTC1923EGN is a high-efficiency thermoelectric cooler (TEC) / heater pulse-width modulator controller integrating two sets of complementary output drivers in a 28-pin SSOP package with exposed pad. The part is specified for a 2.7V to 5.5V supply range, draws 2 mA quiescent current, and operates the TEC load via a full-bridge switching topology that supports both unidirectional and bidirectional current flow. The switching frequency is 225 kHz (typical), enabling small magnetics while keeping switching losses manageable for TEC currents in the 1-3 A class. A thermoelectric cooler (TEC) controller is a specialised power-management IC that drives a Peltier-effect module used for solid-state heating and cooling. TEC modules require DC current whose polarity selects heating vs cooling and whose magnitude controls thermal flux, so the controller must provide an efficient bidirectional current source. The LTC1923 family fits in the broader hierarchy: PMIC -> power management specialised -> TEC controller -> semiconductor IC. The part complements optical transceivers, DFB/DBR laser diodes, scientific CCD/CMOS sensors, and any closed-loop thermal system where sub-100 mK stability is the design target. Key features include a single-rail 2.7-5.5V supply, 2 mA supply current, integrated full-bridge drivers rated for the TEC load, support for both heating and cooling modes, and a synchronisable oscillator. The SSOP-28 footprint with thermal pad keeps PCB area small while offering a thermal path for the gate-driver dissipation. The wide supply range makes the part directly compatible with 3.3V and 5V digital rails found in laser-diode driver boards and instrumentation front-ends. The LTC1923 implements a voltage-mode PWM core with adjustable dead time, integrated bootstrap drivers for the high-side switches, and logic-level control inputs for direction and enable. By integrating the full-bridge drivers, the part removes the need for an external gate-driver IC and the dead-time management normally associated with discrete H-bridge designs, simplifying the BOM and reducing the loop-delay penalty in the thermal control loop. Typical applications include DFB laser-diode temperature stabilisation (DFB telecom modules), DWDM optical-component thermal management, scientific instrumentation thermal control (CCD/CMOS image sensors, photodetectors), medical-laser thermal regulation, and industrial Peltier-based enclosures. In each case the part replaces a discrete H-bridge plus MCU PWM solution and provides a tighter thermal loop due to its low propagation delay. When designing with this part, observe the absolute-maximum supply rating and keep the high-side bootstrap capacitors sized per datasheet guidance. Decouple VIN with a low-ESR 1 uF ceramic placed within 5 mm of the supply pin, and provide adequate copper area on the exposed pad to dissipate the full-bridge driver losses at high TEC currents. This page synthesises distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, complementing Analog Devices' official LTC1923 datasheet (1923f.pdf).
LTC1923EUH - TEC Cooler/Heater PWM Controller | Analog Devices
The Analog Devices LTC1923EUH is a high-efficiency thermoelectric cooler (TEC) pulse-width modulation controller housed in a 32-pin QFN (5x5 mm) exposed-pad package. It integrates two sets of complementary output drivers to drive a full H-bridge, providing bidirectional current control of a TEC element from a single 2.7 V to 5.5 V supply. The device is a specialized power management IC aimed at temperature-stabilized laser modules, photonic subsystems, and laboratory instrumentation. A thermoelectric cooler controller is a specialized PWM power-management IC that drives Peltier-effect modules used for precise heating and cooling. Unlike a general-purpose DC-DC controller, the LTC1923EUH integrates the bidirectional H-bridge drivers, soft-start, current limiting, and thermal feedback loops in one IC. It belongs to the broader hierarchy: TEC controller -> specialized PMIC -> power management IC -> semiconductor. This category converts electrical energy into a controlled thermal gradient with high efficiency, enabling sub-degree temperature set-point stability in optoelectronic and biomedical systems. Key features of the LTC1923EUH include a 225 kHz switching frequency for compact magnetics, integrated synchronous MOSFET gate drivers capable of several amps of bridge current, and an accurate temperature feedback loop using an external thermistor or RTD. It supports both unidirectional and bidirectional TEC operation, and the exposed pad provides a low 32-lead QFN thermal resistance for sustained switching currents. Supply current is typically 2 mA, and the operating temperature spans -40 °C to +85 °C for industrial environments. The LTC1923EUH uses a voltage-mode PWM architecture with synchronous rectification to maximize efficiency across the TEC's wide dynamic load range. The two complementary output pairs produce a true bidirectional H-bridge, allowing current direction reversal without external relay switching. Internal dead-time control and adaptive break-before-make logic prevent shoot-through, while programmable soft-start limits inrush current to the TEC element at power-up. Typical applications include temperature-controlled laser diode mounts for DWDM and Raman spectroscopy, optical transceiver modules, 5G optical components, DNA amplification (PCR) thermal blocks, and medical diagnostic instruments. In each case, the LTC1923EUH replaces a discrete op-amp + MOSFET + thermistor solution with a single IC, reducing PCB area and BOM cost. When designing with this IC, ensure the exposed pad is soldered to a sufficiently large copper pour (at least 1 square inch) to dissipate the gate-driver and bias losses. Decouple VCC with a 1 µF ceramic capacitor placed within 5 mm of the IC, and select the output inductor and TEC current-sense resistor using the formulas in the manufacturer's datasheet typical application circuit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LTC2924IGN#TRPBF - Quad Power Supply Sequencer SSOP-16 | Analog Devices
The Analog Devices LTC2924IGN#TRPBF is a quad power supply sequencer in a 16-lead SSOP (GN) package designed for use with external N-channel MOSFETs or power supplies with shutdown pins. It sequences and monitors up to four supplies (six with minimal external circuitry) and is cascadable for additional rails, with configurable turn-off order (reverse order or simultaneous). A power supply sequencer is a power management IC that controls the turn-on and turn-off sequence of multiple DC rails in a system. Sequencers sit in the hierarchy: power management IC (PMIC) > supervisor/sequencer > sequencer. They are essential in multi-rail systems (FPGAs, DSPs, SoCs, ADCs) that require controlled rail-to-rail timing to prevent latch-up, inrush damage, or incorrect bias during startup. By enforcing a deterministic order, sequencers protect downstream devices and simplify firmware coordination. Key features include a charge pump that drives external N-channel MOSFET gates, built-in fault monitoring with FAULT output, programmable ramp delay via a single resistor, and a wide supply voltage range. The 16-SSOP (GN) package is a surface-mount narrow-body outline with a thermal pad for improved dissipation, well suited to compact multi-rail boards. The LTC2924 uses a precision comparator-based architecture with internal bandgap references. Each sequenced rail is monitored via two feedback resistors, allowing the sequencer to detect when a rail is within regulation and advance to the next. The cascadable design supports larger systems by daisy-chaining multiple LTC2924 devices. Typical applications include FPGA/DSP/ASIC power sequencing, multi-rail telecom cards, network switches, industrial controllers, and medical imaging boards. The wide input range and MOSFET gate drive make it suitable for 1V to 25V rails with sub-millisecond timing control. When designing with this device, ensure each rail's feedback divider is sized for the rail voltage (two resistors per rail). Use the recommended bypass capacitors near VCC and at each GATE output. PCB layout should keep feedback traces short and away from switching nodes to avoid false trip events. This page synthesizes distributor pricing, drop-in alternatives, and practical sequencing design notes not consolidated in the manufacturer datasheet alone.
LTC2928CUHF - 4-Channel Power Supply Sequencer & Supervisor | ADI
The Analog Devices LTC2928CUHF is a four-channel cascadable power supply sequencer and high-accuracy supervisor housed in a 38-lead QFN (5x7 mm) package, designed to control power-up and power-down sequencing across multiple rails without firmware changes. It features four configurable monitor inputs, individual channel enable outputs, a master CASC pin for stacking unlimited sequencers, and a 1.5% accurate threshold reference, supporting turn-on/turn-off sequencing for systems with 2.5V to 6V rails. A power supply sequencer and supervisor is a mixed-signal IC that controls the order and timing in which multiple voltage rails are enabled during system power-up and disabled during power-down, while continuously monitoring each rail for under-voltage and over-voltage conditions. The LTC2928CUHF sits within the broader category hierarchy of supervisor IC -> voltage monitor -> power management IC -> semiconductor. Cascadable sequencers are essential building blocks in any multi-rail system where inrush current, latch-up, or DSP/FPGA/processor rail-ordering requirements preclude simultaneous rail activation. Key features include four independent sequencer channels with adjustable thresholds, a single-wire cascade interface for expanding beyond four rails, programmable ramp and fault timing via external capacitors, and integrated over-voltage and under-voltage comparators with 1.5% accuracy. Each channel has a dedicated ON/OFF control line, and a FAULT pin aggregates fault events across channels. The device operates from 2.5V to 6V on VCC and supports monitoring of supplies up to 6V directly (higher voltages require external dividers). The LTC2928 architecture uses an external timing capacitor per channel to program turn-on delay, turn-off delay, and fault-retry timing. The master CASC pin synchronizes multiple LTC2928 devices so that an unlimited number of power rails can be sequenced. Per-channel TIMER and SENSE pins interface to the supply being monitored, and the open-drain ON outputs drive external FETs or enable pins of downstream regulators. Typical applications include multi-rail FPGA and DSP boards, ATCA/AdvancedTCA cards, telecom line cards, RAID storage controllers, and industrial controllers where multiple voltage domains must come up in a defined order. The device is also widely used in test and measurement chassis, network switches, and any hot-swap-friendly chassis requiring N+1 redundant power sequencing. When designing with the LTC2928CUHF, place each SENSE pin bypass capacitor close to the IC, keep the timing-capacitor traces short, and use the cascade line as a single net between LTC2928 CASC pins if multiple ICs are stacked. For supplies above 6V, add a resistor divider on SENSE so the divided voltage falls inside the 0.5V to 1.0V threshold window. The exposed pad (Pin 39 on the QFN) must be soldered to the ground plane for thermal and electrical performance. This page synthesizes distributor stock data, drop-in same-package alternatives, and practical design notes not collected on the manufacturer datasheet.
LTC2928CUHF#PBF - 4-Channel Power Sequencer & Supervisor | ADI
The LTC2928CUHF#PBF from Analog Devices is a four-channel cascadable power supply sequencer and high accuracy supervisor. It is designed to manage the power-up and power-down sequencing of multiple supply rails in complex electronic systems, ensuring that each rail turns on and off in a controlled order to prevent latch-up, excessive current draw, or damage to sensitive ICs. The device is housed in a 38-pin QFN package (5x7 mm) and operates over a wide supply voltage range, making it suitable for a variety of industrial, networking, and computing applications. A power supply sequencer is a specialized power management IC that controls the order and timing of multiple voltage rails during system startup and shutdown. It is a critical component in systems with multiple supply voltages, such as FPGAs, ASICs, processors, and mixed-signal boards, where improper sequencing can lead to functional failures or permanent damage. The LTC2928 integrates sequencing and supervision into a single device, reducing board space and component count compared to discrete solutions. Key features of the LTC2928 include the ability to sequence up to four supplies per device, with cascading capability to handle an unlimited number of supplies by connecting multiple LTC2928s together. Sequencing thresholds, order, and timing are configured with just a few external resistors and capacitors, eliminating the need for software or PC board layout changes during development. The device also provides high-accuracy supervision with over-voltage and fault indication, selectable system shutdown, and fault event reporting with diagnostics. Technically, the LTC2928 uses a resistor-programmable architecture to set the sequencing order and timing, with an internal precision reference for accurate threshold detection. It supports both positive and negative supply monitoring, and its cascading interface allows seamless expansion. The device operates from a single supply voltage, typically 3.3V or 5V, and includes an open-drain fault output for system-level monitoring. Typical applications include FPGA and ASIC power sequencing, server and storage systems, telecom and networking equipment, and industrial control systems. The LTC2928 is particularly suited for designs where multiple voltage rails must be sequenced reliably without software intervention, and where high accuracy supervision is required to protect downstream components. When designing with the LTC2928, it is important to properly set the sequencing thresholds and timing using external resistors and capacitors, and to ensure adequate decoupling on the supply pins. The device's cascading feature should be used for systems with more than four rails, and the fault output should be connected to a system controller for proper fault handling.
LTC2947IUHF-65#PBF - 65A Power/Energy Monitor | Analog Devices
Analog Devices LTC2947IUHF-65#PBF is a ±65 A single-phase power and energy monitor with an integrated sense resistor, three internal delta-sigma ADCs, and a 38-QFN 5 mm × 7 mm surface-mount package. It measures voltage from 0 V to 15 V, current from -65 A to +65 A, and power from -975 W to +975 W, while supporting energy accumulation and I2C or SPI digital access. Its integrated high-current sense element simplifies metered power paths by eliminating a separate current-sense resistor. A power and energy monitor measures electrical quantities inside a load path and exposes them digitally for telemetry, diagnostics, energy billing, or control. This device sits in the power-management hierarchy as an energy-metering IC, current monitor, and power monitor. Unlike a general-purpose analog-to-digital converter, the LTC2947-65 combines voltage acquisition, bidirectional current acquisition, real-time power multiplication, and accumulated energy in one dedicated instrument. Verified product information highlights the device's ±65 A current capability, three no-latency delta-sigma ADCs, and analog voltage-current multiplication. Its broad measurement range allows one monitor to cover positive consumption, reverse current, and high-current system buses. The manufacturer describes the LTC2947-65 family as a high-precision power and energy meter, while distributor records identify LTC2947IUHF-65#PBF as a single-phase meter IC in a 38-QFN package. The monitor supports internal or external clocking for precise, selectable integration intervals. Digital configuration permits a host processor or energy-metering controller to retrieve measurements over I2C or SPI. This makes the device useful where an embedded controller must observe demand, detect overload conditions, record consumption, or expose operating data through a communications bus without building a discrete shunt and analog front end. Typical installations place the integrated current path in series with a high-current DC supply while the voltage measurement network senses the monitored bus. The 0 V to 15 V voltage range is suited to common low-voltage power rails, and the -65 A to +65 A current range supports chargers, battery systems, industrial supplies, test equipment, and power-distribution modules. Because measured power can reach -975 W to +975 W, designers should select connectors, PCB copper, and thermal construction for the full operating current rather than only the nominal metering range. The main design consideration is Kelvin routing: voltage and current sense connections should follow the manufacturer's layout guidance so high-current copper drops do not become part of the measurement error. Decoupling must be implemented according to the manufacturer datasheet, and the exposed thermal feature should be connected to suitable PCB copper. Verify the complete pinout and exposed-pad requirements on the official LTC2947-65 documentation before layout release. This page combines manufacturer product information with distributor availability and packages verified drop-in alternatives only where exact pin compatibility can be established. It also adds engineering-oriented comparisons, PCB cautions, and selection guidance that are not visible in a basic distributor catalog listing.
LTC2947IUHF-65#TRPBF - 65A Power/Energy Monitor IC | Analog Devices
The Analog Devices (formerly Linear Technology) LTC2947IUHF-65#TRPBF is a high-precision 65A power and energy monitor IC with an integrated internal sense resistor, packaged in a 38-lead plastic QFN (5 mm x 7 mm) with an exposed pad for thermal dissipation. It supports bidirectional current measurement from -65A to +65A, voltage measurement from 0V to 15V, and computes instantaneous power in the range of -975W to +975W with high accuracy through analog multiplication of voltage and current. According to the manufacturer's datasheet, the part employs three internal No Latency Delta-Sigma ADCs that synchronously sample voltage, current, and die temperature, ensuring accurate coulomb counting and energy accumulation across a wide operating envelope. A power/energy monitor is an integrated mixed-signal IC that performs high-side or low-side current sensing, bus-voltage digitisation, time-integrated energy metering, and digital host reporting over serial bus. Within the broader taxonomy, the LTC2947 sits in the family of single-phase energy metering ICs, which are themselves a sub-category of power monitoring ICs, further classified under power management semiconductor devices. These parts are widely used to close the feedback loop between a load and a host processor or data-acquisition system by exposing precise real-time power telemetry for closed-loop control, billing-grade metering, or system health monitoring. Three key features differentiate the LTC2947IUHF-65#TRPBF from generic current-sense amplifiers: (1) the on-chip 65A sense resistor eliminates shunt sourcing and Kelvin-layout burden; (2) the analog multiplier performs high-bandwidth instantaneous power computation without latency penalty; (3) internal temperature digitisation enables temperature-compensated coulomb count and lifetime energy logging for predictive maintenance. The integrated ADC architecture means raw transducer signals never traverse noisy PCB traces, preserving measurement integrity in high-current switching environments. In terms of architecture, the IC separates the high-current shunt (Kelvin-bonded inside the package) from the low-voltage analog and digital sections, allowing the ADC front-end to operate at low common-mode while the load current traverses the package on an isolated rail. An internal or external clock option drives the ADC conversion rate, and on-chip accumulation registers store 16-bit voltage, current, and power values that the host can read over I2C or SPI. This combination lets the part function as a standalone coulomb counter that wakes the host only when polled, minimising system quiescent draw. Typical applications include rack-mounted server and telecom 48V supply rails, battery-pack current and energy logging for UPS and e-mobility, industrial PLC power-budget monitoring, solar inverter string-level energy harvesting telemetry, and high-current lab instrumentation such as programmable bench power supplies. The 38-QFN package's exposed pad supports the dissipation generated when the full 65A flows through the internal sense resistor. Designers should leave adequate copper area on the PCB beneath the exposed pad to keep junction temperature within the -40C to +85C industrial range, and route the high-current traces on top/bottom layers using Kelvin connections tied back to the part's sense pins. When integrating the part with an upstream MCU, choose either I2C or SPI in firmware-fixed mode based on desired address expansion and host overhead. This page synthesises distributor pricing snapshots, same-package ADI and cross-brand drop-in alternatives, application notes, and PCB-layout design notes that go beyond the LTC2947 datasheet itself, consolidating practical selection information for energy-metering designs.
LTC2955ITS8-2 - Pushbutton On/Off Controller with Auto Turn-On | Analog Devices
The Analog Devices LTC2955ITS8-2 is a micropower pushbutton on/off controller that manages system power by generating a clean enable output from a supply monitor input and a debounced pushbutton input, housed in an 8-pin TSOT-23 (TS8) package. It operates across a 1.6 V to 36 V input voltage range, draws only 1.2 µA typical quiescent current, and provides a configurable pushbutton debounce timer and interrupt output. According to the Analog Devices datasheet, the LTC2955 family is recommended for new designs and starts at $3.03 per 1ku unit list price. A pushbutton on/off controller is a type of power management IC that sits between a mechanical pushbutton and the system's main regulator or load switch. It belongs to the supervisory and reset IC family within the broader category of power management ICs. These devices debounce the pushbutton, generate a clean logic-level enable signal, and provide graceful power-up/power-down sequencing in battery-powered and line-powered systems. The LTC2955 specifically adds an automatic turn-on mode for systems that must power up without a button press. Key features of the LTC2955ITS8-2 include a wide 1.6 V to 36 V operating range, 1.2 µA typical quiescent current, an open-drain INT (interrupt) output that signals a button press or low-voltage event, and a KILL (power kill) input that lets the host force shutdown. The TSOT-23-8 package is suitable for handheld and space-constrained designs, and the part is specified from -40 °C to +85 °C industrial temperature range. The "-2" suffix denotes the active-high enable output polarity variant of the LTC2955 family. Architecturally, the LTC2955 uses a precision bandgap reference, comparators, and a timer block to generate the debounce and turn-off delays. The user programs the debounce time via an external capacitor on the PB/INT pin, and the turn-off time via a capacitor on the tOFF pin. The wide VIN range lets the part interface directly with 1-cell lithium, 2-3 cell alkaline, or industrial 24 V rails without additional level shifting. Typical applications include handheld test instruments, portable medical devices, battery-powered IoT nodes, industrial HMI panels, and any system that needs a soft on/off button instead of a hard mechanical switch. The -2 variant is the right choice when the downstream regulator or load switch expects an active-high enable signal. When designing with the LTC2955ITS8-2, choose pull-up resistors sized for the system leakage budget and place the tOFF and tDEB capacitors close to the IC to avoid noise injection. The KILL pin should be tied to GND through a resistor if unused, and the INT pin requires a pull-up to the logic rail of the host processor. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, organized for engineers who need to evaluate, source, and integrate the LTC2955ITS8-2 quickly.
LTC2955ITS8-2#TRPBF - Pushbutton On/Off Controller | Analog Devices
The Analog Devices LTC2955ITS8-2#TRPBF is a micropower pushbutton on/off controller that manages system power by generating a clean enable output from a supply monitor input and a debounced pushbutton input, housed in an 8-pin TSOT-23 (TS8) package with tape-and-reel packaging. It operates over a wide 1.5 V to 36 V input range, draws only 1.2 µA typical quiescent current, and provides an open-drain / active-high INT output that flags pushbutton events and low-supply conditions to the host processor. A supervisory circuit (also called a power supply controller or power management controller) is an IC that monitors and controls the power rails of an electronic system. Pushbutton on/off controllers form a sub-category used to replace mechanical power switches with a momentary pushbutton while offering clean, debounced, sequencing-aware enable signals. Within the broader power-management IC hierarchy, supervisory circuits sit alongside voltage regulators and supervisors/reset ICs, providing the human-machine interface between the user and the power tree. Key features of the LTC2955 include automatic turn-on (the -2 variant enables the system when KILL is asserted, while the -1 variant disables it), a user-configurable power-on reset / debounce timer, wide 1.5 V–36 V VIN tolerance, integrated pushbutton debounce, and a polarity-independent pushbutton interface. According to the manufacturer datasheet 2955fa, the device provides a clean enable output via an open-drain pin capable of driving an external P-FET or PNP transistor, plus an INT output that can wake or interrupt the system microcontroller. Typical applications include handheld instruments, portable medical devices, notebook and tablet power sequencing, automotive telematics boxes, and industrial handheld terminals. The wide VIN range (1.5 V–36 V) allows the LTC2955 to monitor 1-cell Li-Ion, 2-cell Li-Ion, 12 V lead-acid, and even 24 V industrial buses directly without additional level translation. When designing with this part, place the KILL pull-up and the enable gate pull-up as close as possible to the IC, and add a small RC on the PB pin if the mechanical switch has high bounce. The INT pin is open-drain and requires a pull-up resistor to the logic supply of the host. According to Analog Devices documentation, the -2 polarity means the system powers up automatically on KILL assertion, which is preferred for systems that must start without user input (such as always-on sensor nodes).
LTC2956IUD-1 - 36V Micropower Wake-Up Timer w/ Pushbutton | ADI
The Analog Devices LTC2956IUD-1 is a micropower, wide-input-voltage, configurable wake-up timer with pushbutton control, packaged in a 12-lead 3x3 mm QFN (UD) with exposed thermal pad. It operates from a 1.5V to 36V supply, draws only 800 nA quiescent current during normal operation, and drops to 300 nA in hardware shutdown, making it ideal for battery-powered duty-cycled systems. A wake-up timer IC is a low-power supervisor that periodically powers up a host system from deep sleep, holds the rail on for a defined awake interval, and then returns the system to sleep. Wake-up timers sit in the power management hierarchy alongside voltage supervisors and reset ICs, but unlike a one-shot reset supervisor they add a programmable periodic interval (1 ms to 39 days via an external resistor) and a pushbutton debounce/control interface that lets a human override the timer to force shutdown, turn-on, or reset. Key features of the LTC2956IUD-1 include a configurable wake-up period from milliseconds to 39 days set by a single resistor, an ONMAX capacitor that sets the maximum system-awake interval, an EN output that gates downstream rails, a /PBO pushbutton input with on-chip debounce, and a /KILL output that asserts on long-press shutdown. The /INT status output can wake an MCU from deep sleep. The -1 variant is the active-low reset polarity configuration. Internally the LTC2956 uses a low-power RC oscillator, precision current references, and micropower comparators to achieve its 800 nA Iq. A 1.5V to 36V input range allows direct connection to single-cell Li-Ion, multi-cell NiMH, 12V lead-acid, and 24V industrial rails without pre-regulation. The exposed-pad QFN-12 package keeps thermal resistance low so the IC can drive small DC-DC EN or P-channel MOSFET gates directly. Typical applications include battery-powered IoT sensor nodes that wake hourly to take a measurement, security cameras that capture an image on pushbutton, e-paper displays with daily refresh, GPS trackers on weekly duty cycle, remote controls, and any ultra-low-power MCU system requiring both pushbutton on/off and scheduled periodic wake. The 39-day upper bound makes it useful for long-interval telemetry. When designing with the LTC2956IUD-1, choose RWAKE for the desired wake interval, CMAX for the maximum awake window, and tie /PBO to a tactile switch to ground. Add a 100 nF decoupling cap close to VIN and route the exposed pad to a copper pour. The /KILL output requires a 1 MΩ pull-up to VIN. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not aggregated in the manufacturer datasheet.
LTC2974IUP - 4-Ch PMBus Power System Manager | Analog Devices
The Analog Devices LTC2974IUP is a 4-channel Power System Manager that sequences, trims (servo), margins, supervises, manages faults, provides telemetry, and creates fault logs in a 64-lead (9mm × 9mm) plastic QFN package. It operates over an industrial temperature range of -40°C to 105°C and provides PMBus-compliant digital control of point-of-load supplies with EEPROM for non-volatile configuration. A Power System Manager is a class of mixed-signal supervisor IC that combines analog monitoring (voltage, current, temperature) with a digital control engine implementing PMBus commands. The LTC2974 occupies the role of digital supervisor between an FPGA/processor and its multiple POL rails, allowing precise voltage margining, sequencing, and fault logging. Within the broader hierarchy it sits at: power system manager -> digital supervisor -> power management IC -> mixed-signal semiconductor. Key features include four differential ±0.25% accurate 16-bit ADCs for rail voltage and current readback, four 10-bit DAC-controlled servo loops for closed-loop voltage trimming, four programmable fault thresholds, on-chip 256-byte user-EEPROM, integrated temperature sensor, and full PMBus 1.1/SMBus 2.0 interface support. The four closed-loop servos enable trim accuracy far beyond what external resistor dividers can deliver, while the per-rail fault log captures telemetry from black-box style fault events. The architecture integrates an analog front-end with a digital core that runs an internal state machine. The device accepts commands over PMBus to set output voltage, readback V/I/T, assert sequencing events, and log faults. The EEPROM stores the configuration profile, including sequencing order, trim targets, and fault thresholds, allowing standalone operation without host intervention after power-up. A dedicated SHARE_CLK pin supports multi-device synchronization for systems managing more than four rails. Typical applications include sequence-and-margin control for FPGA/ASIC multi-rail designs, ATCA/uTCA AdvancedMC cards, multicore processor boards (DSP/FPGA/ASIC), industrial servers, and high-availability telecom blades. The EEPROM-backed fault log is particularly useful in unattended telecom and storage systems where power-related events must be diagnosed post-mortem. Designers should plan for an external I²C pull-up and respect the QFN exposed-pad thermal and ground connection. Sequencing, trim, and fault behavior are fully programmable through PMBus commands using ADI's LTpowerPlay GUI, simplifying bring-up. For systems beyond four rails, multiple LTC2974s can be cascaded with the SHARE_CLK pin. This page synthesizes distributor pricing, parametric comparison tables, and design notes that go beyond the manufacturer datasheet to help engineers select, source, and implement the LTC2974 in multi-rail power systems.
LTC2974IUP#PBF - 4-Ch PMBus Power System Manager, 64-QFN
The Analog Devices LTC2974IUP#PBF is a 4-channel PMBus-compliant Power System Manager that sequences, trims, margins, supervises, manages faults, logs events, and provides telemetry, housed in a 64-lead 9 mm x 9 mm plastic QFN package. Headline capabilities include digital point-of-load voltage adjustment with 0.5% servo accuracy over temperature, integrated fault logging with black-box EEPROM, and 256 bytes of user-configurable EEPROM with CRC protection. The I2C/SMBus interface accepts the full PMBus command set for sequencing, margining, and telemetry readout. What is a Power System Manager? A power system manager is a digital supervisory IC that sits between a host processor and multiple point-of-load (POL) converters, replacing discrete analog sequencers, supervisors, and margining circuitry with one configurable device. Compared to discrete supervisors, a PSM stores trim coefficients, fault logs, and sequencing rules in non-volatile memory and lets engineers reconfigure rails via PMBus commands without board rework. PSMs occupy the tier above supervisor ICs in the power-management hierarchy: supervisor IC -> sequencer/monitor -> power system manager -> digital power platform. Key features of the LTC2974IUP#PBF include 4 independent channels, 0.5% output voltage servo accuracy across -40 C to +105 C, integrated temperature sensing, on-board 12-bit ADC for VIN/VOUT readback, and time-stamped fault logging. The device accepts a 4.5 V to 15 V supply and presents 3.3 V/5 V tolerant digital I/O, simplifying interfacing with FPGAs, ASICs, and baseboard controllers. The architecture combines a precision 12-bit ADC, four 10-bit DACs for trim servo, an EEPROM controller with CRC, and an SMBus slave. A built-in sequencer state machine implements rail-on/rail-off dependencies, while the supervisor block continuously monitors under-voltage, over-voltage, and over-temperature thresholds with programmable response times. Typical applications include high-density FPGA/ASIC multi-rail power platforms, telecom and networking line cards, ATCA/uTCA AdvancedMC boards, and industrial servers where deterministic sequencing, accurate margining, and post-mortem fault logs are mandatory. The 64-QFN package is suitable for reflow assembly with MSL3 floor life. When designing with this IC, allocate one I2C address per board by using the four ADDR pins and review the LTpowerPlay configuration toolchain. Place the device close to the POL converters it supervises to minimize analog trace noise coupling into the VOUT sense lines. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
LTC2977IUP - 8-Ch PMBus Power System Manager | ADI
The Analog Devices LTC2977IUP is an 8-channel PMBus Power System Manager used to sequence, trim (servo), margin, supervise, manage faults, provide telemetry and create fault logs in a 64-pin (9 mm x 9 mm) Plastic QFN package. It is a current and power monitoring and regulation device with a 4.5 V to 15 V supply range and 3.3 V auxiliary supply, designed for sequencing and precision point-of-load adjustment in high-density multi-rail systems. A Power System Manager is a digital supervisor IC placed above point-of-load converters on a board's power tree; it interfaces to the host through PMBus (Power Management Bus) and replaces discrete supervisors, DACs, and watchdog timers with a single configurable device. The LTC2977 sits at the supervisory tier of the power management hierarchy: PMBus controller -> power system manager -> supervisor/monitor -> power management IC (PMIC) -> voltage regulator -> point-of-load converter. Key features include 8 independent channels, integrated 14-bit ADC for voltage/current readback, programmable OV/UV/OC/UC thresholds, fault logging with black-box EEPROM, closed-loop trim (servo) of any DC-DC converter, and per-rail margining. The IUP suffix denotes the -40 C to +105 C industrial temperature grade. Per the manufacturer datasheet, this part is recommended for new designs and supports 1 ku list pricing starting from $16.46 as of 2026-10-08. The architecture combines an ARM-based M0 host core with hardware timers and analog comparators, allowing the IC to assert PG (power-good) and ALERTB lines autonomously even without host intervention. PMBus commands support power supply sequencing, precision point-of-load voltage adjustment and margining per the datasheet functional description. Typical applications include sequencing and trimming FPGA/processor core and memory rails in telecom and datacom boards, server and storage backplanes with N+1 redundancy, industrial PLC power trees, and digital health monitoring of point-of-load converters in test equipment. When designing with the LTC2977IUP, observe the 4.5 V to 15 V VDD range and decouple the 3.3 V AUX rail with a 1 uF X7R ceramic close to the pin. Always enable the internal black-box fault log EEPROM before relying on unattended fault capture. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes not consolidated on any single distributor or manufacturer page.
LTC3112EFE#PBF - 15V, 2.5A Sync Buck-Boost DC/DC | Analog Devices
The LTC3112EFE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide 2.7V to 15V input range. Housed in a 20-pin TSSOP (0.173", 4.40mm width) with exposed pad, this converter uses a unique 4-switch, single inductor architecture to provide low noise and seamless operation whether the input voltage is above, below, or equal to the output voltage. The output is positive adjustable from 2.5V up to 14V, making it highly versatile for battery-powered and multi-rail systems. A buck-boost converter is a type of DC-DC switching regulator that can step up or step down an input voltage to produce a regulated output. It is essential in applications where the input voltage can vary above and below the desired output, such as with batteries that discharge over time. The LTC3112 belongs to the family of switching regulators, which are more efficient than linear regulators for large voltage differences, and it is a key component in power management ICs for portable and industrial devices. Key features include a 2.5A continuous output current, a wide 2.7V to 15V input range, and an adjustable output from 2.5V to 14V. The device operates at a fixed frequency (typically 1.2MHz) and offers high efficiency across a broad load range. It includes internal synchronous switches, eliminating the need for external Schottky diodes, and provides low output ripple for noise-sensitive applications. The LTC3112 also features a shutdown mode that reduces quiescent current to microamperes, extending battery life in portable devices. Technically, the LTC3112 uses a 4-switch architecture with a single inductor, which allows seamless transitions between buck, boost, and buck-boost modes. This design minimizes output voltage glitches during mode transitions, a common issue in traditional buck-boost converters. The device includes soft-start to limit inrush current, current mode control for fast transient response, and thermal shutdown protection. The exposed pad on the TSSOP package aids in heat dissipation, allowing the converter to deliver full 2.5A output without excessive junction temperature rise. Typical applications include generating 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. The wide input range and high output current make it ideal for industrial, automotive, and portable electronics where input voltage varies significantly. When designing with the LTC3112, ensure proper inductor selection (typically 2.2µH to 10µH) and adequate input/output capacitance to maintain stability and low ripple. The exposed pad must be soldered to a copper pour for thermal management. Also, consider the trade-off between efficiency and output ripple when choosing the operating mode.
LTC3112EFE#TRPBF - 15V, 2.5A Sync Buck-Boost DC/DC | ADI
The LTC3112EFE#TRPBF from Analog Devices is a fixed frequency synchronous buck-boost DC/DC converter with an extended input and output range. It delivers up to 2.5A output current from a 20-TSSOP exposed pad package. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below or equal to the output voltage. With an input range of 2.7V to 15V and an adjustable output from 2.5V to 14V, it is ideal for battery-powered and industrial applications. A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to a regulated output voltage, regardless of whether the input is higher or lower than the output. This is achieved through a combination of buck and boost topologies, typically using four switches and a single inductor. The LTC3112 belongs to the family of switching regulators, which are power management ICs that convert one DC voltage to another with high efficiency. Unlike linear regulators, switching regulators use inductive energy storage to achieve high efficiency, making them suitable for battery-powered devices where power loss must be minimized. Key features of the LTC3112 include a 2.5A continuous output current, a wide 2.7V to 15V input range, and an adjustable output voltage from 2.5V to 14V. It operates at a fixed frequency of 1.2MHz, allowing the use of small, low-profile inductors and capacitors. The device offers high efficiency up to 95%, and its Burst Mode operation reduces quiescent current to 50uA, extending battery life in light-load conditions. The LTC3112 also includes a power-good indicator, soft-start, and current limit protection. Technically, the LTC3112 uses a 4-switch synchronous rectifier architecture with a single inductor, which minimizes component count and PCB area. The fixed 1.2MHz switching frequency enables a compact solution with low output ripple. The device is designed for low noise operation, making it suitable for noise-sensitive applications such as RF and audio systems. The exposed pad package (TSSOP-20) provides excellent thermal performance, with a thermal resistance of 38°C/W, allowing efficient heat dissipation in high-current applications. Typical applications include portable instruments, battery-powered equipment, industrial power supplies, and point-of-load regulation. The wide input range makes it ideal for systems powered by multi-cell batteries or unregulated wall adapters. The LTC3112's ability to seamlessly transition between buck and boost modes ensures a stable output even as the battery voltage drops below the regulated output. When designing with the LTC3112, it is important to select the inductor and capacitors according to the datasheet guidelines to achieve optimal efficiency and transient response. The exposed pad should be soldered to a large copper area for thermal management. Additionally, the Burst Mode feature can be disabled for applications requiring constant frequency operation.
LTC3112IDE#PBF - 15V, 2.5A Buck-Boost DC/DC | Analog Devices
The LTC3112IDE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices, designed to deliver up to 2.5A output current from a wide input voltage range of 2.7V to 15V. Housed in a 16-pin DFN (4mm × 5mm × 0.75mm) package, this converter uses a unique 4-switch, single inductor architecture to provide low noise and seamless operation when the input voltage is above, below, or equal to the output voltage. This makes it ideal for battery-powered and multi-source systems where the input voltage can vary significantly. A buck-boost converter is a type of DC-DC converter that can step up or step down an input voltage to a regulated output voltage, regardless of whether the input is higher or lower than the output. It is a key component in power management ICs, enabling efficient power conversion in portable electronics, industrial equipment, and automotive systems. The LTC3112 belongs to the family of switching regulators, which are preferred over linear regulators for their high efficiency, especially when the input-to-output voltage difference is large. Key features of the LTC3112 include a programmable output voltage from 2.5V to 15V, a switching frequency that can be set from 300kHz to 2MHz via an external resistor, and a low quiescent current of 40uA in Burst Mode operation. The device also offers a power good indicator, soft-start, and current limit protection. Its high efficiency, up to 95%, minimizes power loss and heat generation, making it suitable for space-constrained designs. The LTC3112 uses a current-mode control architecture with a 4-switch topology, which allows for seamless transitions between buck, boost, and buck-boost modes. This architecture ensures low output voltage ripple and fast transient response, critical for powering sensitive loads such as RF transmitters and microprocessors. The device also includes a precision 0.6V reference and an internal compensation network, simplifying the external component count. Typical applications include generating 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. The wide input range and high output current make it a versatile choice for many power supply designs. When designing with the LTC3112, it is important to select the inductor and capacitors according to the datasheet guidelines to ensure stability and optimal performance. The switching frequency should be chosen to balance efficiency and component size, and proper PCB layout with short, low-inductance paths is essential for minimizing noise and EMI.
LTC3112IDE#TRPBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112IDE#TRPBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide input voltage range. Its unique 4-switch, single inductor architecture provides low noise and seamless operation when the input voltage is above, below, or equal to the output voltage. The device is available in a 16-lead plastic DFN (4mm × 3mm) package with an exposed pad, suitable for compact power management designs. A buck-boost converter is a type of DC-DC switching regulator that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage may drop below the required rail, or in applications needing a regulated output from a varying input source. The LTC3112 belongs to the family of synchronous converters, which use active switches instead of diodes for higher efficiency, and it is part of the broader power management IC category. Key features include a 2.5A continuous output current, an input voltage range of 2.5V to 15V, and an adjustable output voltage from 2.5V to 15V. The switching frequency is fixed at 1.2MHz, allowing small external components. The device offers high efficiency up to 95%, low quiescent current, and a shutdown mode that reduces supply current to under 1µA. It also includes soft-start, current limiting, and thermal shutdown protection. Technically, the LTC3112 uses a 4-switch architecture with a single inductor, which minimizes noise and component count compared to traditional two-stage solutions. The synchronous rectification improves efficiency, especially at lower output voltages. The device operates in PWM mode at heavy loads and automatically transitions to Burst Mode® operation at light loads to maintain high efficiency across the load range. Typical applications include portable electronics, industrial instrumentation, automotive systems, and battery-powered devices where a regulated output is needed from a varying input source. The wide input range and high output current make it suitable for powering FPGAs, microcontrollers, sensors, and communication modules. When designing with the LTC3112, ensure proper PCB layout with short, wide traces for high-current paths and adequate thermal vias to the exposed pad. The inductor and capacitors should be placed close to the IC to minimize parasitic inductance and noise.
LTC3112MPFE#PBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112MPFE#PBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology). It delivers up to 2.5A output current from an input voltage range of 2.7V to 15V, with an adjustable output voltage from 2.5V to 14V. The device is housed in a 20-pin TSSOP with exposed pad (HTSSOP-20) and operates over the military temperature range of -55°C to +150°C (junction). A buck-boost converter is a type of DC-DC converter that can produce an output voltage either higher or lower than the input voltage. It is essential in battery-powered systems where the battery voltage can drop below or rise above the required rail. The LTC3112 uses a unique 4-switch, single inductor architecture that provides low noise and seamless transitions between buck, boost, and buck-boost modes, ensuring a stable output regardless of input variations. Key features include a switching frequency of 750kHz, which allows for small external components, and a high efficiency synchronous design that eliminates the need for an external Schottky diode. The device also includes a built-in soft-start, overcurrent protection, and thermal shutdown. The exposed pad on the TSSOP package aids in thermal dissipation, making it suitable for high-current applications. The LTC3112MPFE#PBF is designed for a wide range of applications, including 3.3V or 5V rails from 1, 2, or 3 Li-Ion cells, backup capacitor stacks, handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and 12V lead-acid battery to 12V conversion. Its wide input range and high output current make it a versatile choice for portable and industrial equipment. When designing with this converter, pay attention to the inductor selection and PCB layout to minimize noise and ensure stability. The exposed pad should be soldered to a large copper area for effective heat sinking. The LTC3112MPFE#PBF is RoHS compliant and lead-free, making it suitable for environmentally conscious designs.
LTC3112MPFE#TRPBF - 15V, 2.5A Sync Buck-Boost | Analog Devices
The LTC3112MPFE#TRPBF is a fixed frequency synchronous buck-boost DC/DC converter from Analog Devices (formerly Linear Technology) that delivers up to 2.5A output current from a wide 2.7V to 15V input range. Housed in a 20-pin TSSOP with exposed pad (TSSOP-20EP), this device provides a positive adjustable output from 2.5V to 14V, making it ideal for systems powered by multiple cell chemistries or fluctuating supply rails. A buck-boost converter is a type of DC-DC switching regulator that can step up or step down an input voltage to produce a regulated output, regardless of whether the input is higher, lower, or equal to the output. This capability is essential in battery-powered devices where the battery voltage naturally declines over discharge, or in systems that must operate from a variety of power sources. The LTC3112 belongs to the family of synchronous switching regulators, which use internal MOSFETs for both high-side and low-side switches to achieve high efficiency and eliminate the need for an external Schottky diode. Key features of the LTC3112 include a unique 4-switch, single inductor architecture that provides low noise and seamless transitions between buck and boost modes. It supports selectable PWM or Burst Mode operation, an easily synchronized oscillator, and output disconnect in shutdown. The device also includes an output current monitor, <1μA shutdown current, short-circuit protection, soft-start, current limit, and thermal shutdown. With an input range of 2.7V to 15V and output up to 14V, it can generate 3.3V or 5V from one, two, or three Li-Ion cells, or boost a 12V lead-acid battery to a regulated 12V rail. Technically, the LTC3112 uses a current-mode control architecture with a fixed switching frequency that can be synchronized to an external clock. The 4-switch topology allows the inductor to be connected across the input or output depending on the mode, minimizing voltage stress and improving efficiency across a wide operating range. The output current monitor provides a proportional voltage that can be used for load current measurement or as a feedback signal for current regulation, enabling applications such as LED current regulation. Typical applications include handheld inventory terminals, RF transmitters, 12V synchronous boost converters, multiple power input systems, LED lighting with current regulation, and backup capacitor stacks. The wide input range and high output current make it suitable for industrial, automotive, and portable electronics where supply voltages vary. When designing with the LTC3112, pay careful attention to the inductor selection and PCB layout to minimize parasitic inductance and ensure stable operation. The exposed pad must be soldered to a copper plane for adequate thermal dissipation, especially at high output currents. Additionally, the Burst Mode operation can be disabled for applications requiring constant frequency operation to avoid interference with sensitive analog circuits.