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LTC3370MPUH#PBF - 4-Ch 8A Configurable Buck | Analog Devices
The LTC3370MPUH#PBF is a highly flexible multioutput power supply IC from Analog Devices. It integrates four synchronous buck converters that share eight 1A power stages, each powered from independent 2.25V to 5.5V inputs. The device supports eight unique output configurations, allowing up to 4A per channel, and is pin-programmable via C1-C3 pins. Housed in a 32-lead WFQFN package with exposed pad, this regulator is designed for space-constrained, multi-rail systems. A multioutput buck converter is a type of DC-DC switching regulator that provides multiple regulated output voltages from a single input supply. It belongs to the broader category of power management ICs, which manage power distribution and conversion in electronic systems. By integrating multiple converters on one chip, it reduces component count, board area, and cost compared to discrete solutions. Key features include a wide input voltage range of 2.25V to 5.5V, adjustable output voltage down to 0.8V, and a common switching frequency programmable via an external resistor. The device achieves high efficiency through synchronous rectification and offers low total no-load supply current, making it suitable for battery-powered applications. Its flexible configuration allows designers to allocate power stages dynamically to meet varying load requirements. Technically, the LTC3370 uses a current-mode control architecture with internal compensation, ensuring stable operation across a wide range of output capacitors. The eight power stages can be combined in various parallel configurations to deliver higher current to a single output or distributed across multiple outputs. The pin-programmable C1-C3 pins simplify configuration without external components, reducing design complexity. Typical applications include portable devices, industrial equipment, and automotive systems where multiple low-voltage rails are needed. For example, it can power an FPGA core, I/O, and auxiliary circuits from a single 5V supply. Its high efficiency and low quiescent current extend battery life in handheld devices. When designing with this device, ensure proper input and output capacitor selection to maintain stability and minimize ripple. The exposed pad must be soldered to a large copper area for adequate thermal dissipation, especially at high output currents.
LTC3370MPUH#TRPBF - 4-Ch 8A Configurable Buck | Analog Devices
The LTC3370MPUH#TRPBF is a highly flexible multioutput power supply IC from Analog Devices, featuring four synchronous buck converters that share eight 1A power stages. Each power stage is powered from independent 2.25V to 5.5V inputs, and the DC/DCs can be configured into one of eight unique output configurations via pin-programmable C1-C3 pins. The device supports output currents up to 4A per channel and provides a low total no-load supply current, making it ideal for battery-powered and energy-efficient systems. A multioutput buck converter is a type of DC-DC switching regulator that integrates multiple step-down channels in a single package, allowing designers to generate several regulated voltage rails from a common input supply. This category sits within the broader hierarchy of power management ICs, which include linear regulators, charge pumps, and other switching converters. The LTC3370's configurable architecture enables it to replace multiple discrete regulators, reducing board space and component count. Key features include a wide input voltage range of 2.25V to 5.5V, eight 1A power stages that can be combined for higher current, and a programmable switching frequency set by an external resistor. The device also offers independent enable pins for each channel, soft-start, and overcurrent protection. Its 32-lead WFQFN package with exposed pad ensures excellent thermal performance, and the MP suffix indicates a -40°C to 125°C operating junction temperature range, suitable for industrial and automotive environments. The LTC3370 uses a current-mode, constant-frequency architecture with internal synchronous switches, achieving high efficiency across a wide load range. The configurable power stage assignment allows designers to optimize the number of channels and current capability for their specific application, reducing power loss and improving transient response. The device also includes a low quiescent current mode for light-load efficiency. Typical applications include point-of-load regulation in FPGA, DSP, and ASIC power supplies, as well as battery-powered portable devices, industrial instrumentation, and automotive infotainment systems. The flexible configuration and high integration make it an excellent choice for multi-rail systems where PCB space is at a premium. When designing with the LTC3370, ensure proper decoupling on each input supply and place the external frequency-setting resistor close to the RT pin. The exposed pad should be soldered to a large copper area for optimal heat dissipation, especially when operating at high output currents.
LTC3372EUH#PBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
The LTC3372EUH#PBF from Analog Devices is a highly flexible multioutput power supply IC that integrates a high-voltage (HV) step-down DC/DC switching regulator controller and four low-voltage (LV) synchronous buck converters. The HV controller drives an all N-channel synchronous power FET stage from a 4.5V to 60V input, while the four LV channels are configurable to provide up to 8A total output current. Housed in a 48-pin QFN (7x7mm) package, this PMIC is designed for space-constrained industrial, automotive, and communications systems requiring multiple regulated rails. A multioutput power management IC (PMIC) is a single device that integrates multiple voltage regulators and controllers to generate several supply rails from one input source. In the hierarchy of power management, the LTC3372 sits as a PMIC that combines a switching controller (for high-voltage step-down) with integrated buck converters (for low-voltage rails), reducing board space and component count compared to discrete solutions. This architecture is essential in systems where multiple voltages are needed, such as FPGAs, processors, and mixed-signal circuits. Key features include a 4.5V to 60V input range for the HV controller, a low quiescent current (Low IQ) for battery-powered applications, and four configurable LV buck channels that can be paralleled for higher current. The device supports spread spectrum operation for reduced EMI and includes a precision reference for accurate output regulation. The 48-QFN package with exposed pad provides excellent thermal performance, enabling high power density. Technically, the LTC3372 uses a current-mode control architecture for fast transient response and stable operation over a wide range of output capacitors. The HV controller can be configured for various topologies, including buck, boost, or buck-boost, using external FETs. The LV channels are synchronous buck converters with internal switches, offering efficiencies up to 95%. The device includes programmable switching frequency, soft-start, and power-good outputs for sequencing. Typical applications include industrial power supplies, automotive infotainment, base station power, and FPGA/processor power systems. The wide input range and configurable outputs make it ideal for systems that need to operate from 12V, 24V, or 48V buses while generating lower core voltages. When designing with the LTC3372, careful attention must be paid to the HV controller's external FET selection and gate drive layout to minimize parasitic inductance. The LV channels require proper input and output capacitance to maintain stability and low ripple. The exposed pad should be soldered to a large copper area for thermal dissipation.
LTC3372EUH#TRPBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
The LTC3372EUH#TRPBF from Analog Devices is a highly flexible multioutput power management IC (PMIC) that integrates a high-voltage (HV) step-down DC/DC switching regulator controller with four low-voltage (LV) synchronous buck converters. The HV controller drives an all N-channel synchronous power FET stage from a 4.5V to 60V input, while the four LV buck regulators are configurable to share eight 1A power stages, delivering up to 8A total output current. The device is housed in a 48-pin QFN (7x7mm) package and operates over a junction temperature range of -40°C to 125°C (with the E-grade version guaranteed from 0°C to 85°C). A PMIC (Power Management Integrated Circuit) is a highly integrated device that consolidates multiple power conversion and management functions into a single chip, such as DC/DC converters, LDOs, and battery chargers. The LTC3372 belongs to the class of multioutput switching regulators, which are essential in systems requiring multiple voltage rails from a single input supply, such as industrial, automotive, and communications equipment. By integrating a high-voltage controller and configurable low-voltage bucks, it reduces board space and component count compared to discrete solutions. Key features include a 60V input capability for the HV controller, low quiescent current (Low IQ) for improved efficiency at light loads, and pin-programmable configurations (C1-C3 pins) that allow the four LV bucks to be assigned to one of eight power configurations. The switching frequency is programmable via an external resistor, enabling optimization between efficiency and component size. The device also includes soft-start, overcurrent protection, and thermal shutdown. Technically, the LTC3372 uses a current-mode control architecture for fast transient response and stable operation. The HV controller can drive external N-channel MOSFETs, allowing high-current, high-voltage step-down conversion. The LV bucks integrate their power switches, simplifying design and reducing external component count. The pin-strapping configuration provides design flexibility without requiring I2C or SPI communication, making it suitable for standalone applications. Typical applications include industrial power supplies, automotive infotainment and ADAS systems, telecom and networking equipment, and distributed power architectures. The wide input voltage range and configurable outputs make it ideal for systems that need multiple regulated rails from a 12V or 24V bus. When designing with the LTC3372, ensure proper PCB layout with adequate ground planes and decoupling capacitors for both the HV controller and LV bucks. The switching frequency should be chosen to balance efficiency and component size, and the inductor values must be selected according to the datasheet guidelines to avoid saturation.
LTC3372IUH#PBF - 60V Low IQ Buck Controller + 4-Ch 8A Configurable Buck | Analog Devices
The LTC3372IUH#PBF from Analog Devices is a highly flexible multioutput power supply IC that integrates a high-voltage (HV) step-down DC/DC switching regulator controller with four configurable synchronous buck converters. The HV controller drives an all N-channel synchronous power FET stage from a 4.5V to 60V input, while the four buck converters share eight 1A power stages, each powered from independent 2.25V to 5.5V inputs. This device is housed in a 48-pin QFN (7x7mm) package, offering a compact solution for complex power architectures. A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one or more input sources. It typically combines switching regulators, controllers, and sometimes LDOs to generate the various supply voltages needed by modern electronic systems. In the hierarchy of power management, a multioutput power supply IC sits above individual DC-DC converters, integrating multiple conversion channels and control logic into one package, thereby reducing board space, component count, and design complexity. Key features of the LTC3372 include a 60V input capability for the HV buck controller, low quiescent current (IQ) for improved efficiency at light loads, and eight 1A power stages that can be configured as four independent buck converters or combined for higher current outputs. The device supports a wide input voltage range, making it suitable for industrial, automotive, and telecom applications where input voltages can vary significantly. The configurable architecture allows designers to tailor the output currents and voltages to meet specific system requirements. Technically, the LTC3372 employs a current-mode control architecture for the HV controller, ensuring stable operation over a wide range of load conditions. The four buck converters use synchronous rectification to achieve high efficiency, and the power stages can be paralleled to deliver up to 8A per channel. The device includes comprehensive protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout, enhancing system reliability. The low IQ design is particularly beneficial for battery-powered applications where extending battery life is critical. Typical applications include point-of-load power supplies for FPGAs, ASICs, and processors, as well as industrial control systems, automotive infotainment, and telecom equipment. The wide input range and configurable outputs make it ideal for systems that require multiple voltage rails from a single power source. The LTC3372 simplifies power supply design by integrating multiple functions, reducing external component count and board space. When designing with the LTC3372, careful attention must be paid to the layout of the switching nodes and the placement of input and output capacitors to minimize parasitic inductance and ensure stable operation. The thermal pad should be connected to a solid ground plane to enhance heat dissipation, especially when operating at high output currents.
LTC3372IUH#TRPBF - 60V Low IQ Buck Controller | Analog Devices
The LTC3372IUH#TRPBF is a highly flexible multioutput power supply IC from Analog Devices, featuring a high-performance, high voltage (HV) step-down DC/DC switching regulator controller that drives an all N-channel synchronous power FET stage from a 4.5V to 60V input. This device integrates four low voltage (LV) synchronous buck regulators, providing a complete power management solution for a wide range of applications. The LTC3372 is designed for high efficiency and low quiescent current, making it ideal for battery-powered and energy harvesting systems. A multioutput power supply IC is a single integrated circuit that generates multiple regulated voltage rails from a single input source. It typically combines a high-voltage controller with several low-voltage synchronous buck regulators, enabling efficient power conversion for complex systems such as automotive electronics, industrial equipment, and portable devices. The LTC3372 exemplifies this category by offering both a high-voltage step-down controller and four low-voltage synchronous buck converters in a single 48-pin QFN package. Key features of the LTC3372IUH#TRPBF include a wide input voltage range of 4.5V to 60V, low quiescent current for extended battery life, and five independent output channels (one HV controller and four LV regulators). The device supports programmable output voltages and switching frequencies, allowing designers to optimize performance for specific applications. The all N-channel synchronous architecture ensures high efficiency across a wide load range, while the integrated MOSFET drivers simplify the external component count. From a technical perspective, the LTC3372 employs a current-mode control architecture for fast transient response and stable operation. The high-voltage controller can drive external N-channel MOSFETs to step down voltages as high as 60V, while the four low-voltage regulators operate from a lower input rail, typically 2.7V to 5.5V. The device includes comprehensive protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout, ensuring reliable operation in harsh environments. Typical applications for the LTC3372IUH#TRPBF include automotive power systems, industrial control equipment, and energy harvesting systems. In automotive applications, the wide input range accommodates load dump and cold crank conditions, while the low quiescent current helps meet standby power requirements. In industrial settings, the multiple outputs can power microcontrollers, sensors, and communication interfaces from a single 24V or 48V bus. For energy harvesting, the low quiescent current and high efficiency maximize the usable power from solar cells or thermoelectric generators. When designing with the LTC3372, careful attention must be paid to the layout of the high-voltage switching node and the low-voltage regulators to minimize parasitic inductance and ensure stable operation. Proper decoupling and thermal management are essential, especially when operating at high input voltages and load currents. The device's programmable features allow for flexible configuration, but designers should verify all settings against the datasheet to avoid unexpected behavior.
LTC3372MPUH#PBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
The LTC3372MPUH#PBF is a highly flexible multioutput power supply IC from Analog Devices. It integrates a high-performance, high-voltage (HV) step-down DC/DC switching regulator controller that drives an all N-channel synchronous power FET stage from a 4.5V to 60V input. Additionally, it includes four configurable synchronous buck DC/DC converters capable of delivering up to 8A total output current. The device is housed in a 48-pin QFN (7x7mm) package, suitable for space-constrained industrial and automotive power systems. A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one input source. It typically combines controllers and converters to generate various output voltages for complex systems like FPGAs, processors, and mixed-signal boards. The LTC3372 falls under the category of power management ICs (PMICs), specifically multi-rail DC/DC converters, which are essential for efficient power distribution in modern electronics. Key features include a wide 4.5V to 60V input range, a low quiescent current (low IQ) buck controller, and four configurable buck converters with total output current up to 8A. The device supports multiple output configurations, allowing designers to tailor the power solution to specific load requirements. Its high-voltage capability makes it suitable for industrial 24V/48V bus systems and automotive applications. Technically, the LTC3372 employs a current-mode control architecture for fast transient response and stable operation. The integrated buck controller drives external N-channel MOSFETs, enabling high-efficiency conversion at high input voltages. The four buck converters can be paralleled to increase output current or configured for different voltage rails, providing design flexibility. The device operates over a -40°C to 125°C junction temperature range, ensuring reliability in harsh environments. Typical applications include industrial power supplies, automotive body electronics, telecom and networking equipment, and distributed power architectures. The wide input range and multiple outputs make it ideal for powering FPGAs, microprocessors, and mixed-signal systems that require multiple low-voltage rails from a higher-voltage bus. When designing with the LTC3372, careful attention must be paid to PCB layout for the high-current paths and the switching nodes. Proper decoupling and thermal management are essential to achieve optimal performance and reliability.
LTC3372MPUH#TR - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
The LTC3372MPUH#TR is a highly flexible multioutput power supply IC from Analog Devices. It integrates a high-performance, high-voltage (HV) step-down DC/DC switching regulator controller that drives an all N-channel synchronous power FET stage from a 4.5V to 60V input. Additionally, it includes four low-voltage (LV) synchronous buck converters, each capable of delivering up to 8A of output current, configurable for various output voltage and current combinations. The device is available in a compact 44-pin QFN package, suitable for space-constrained industrial and automotive applications. A multioutput power supply IC is a single integrated circuit that provides multiple regulated voltage rails from one or more input sources. It typically combines a controller for an external high-voltage stage with integrated low-voltage converters, enabling efficient power distribution in complex systems. In the hierarchy of power management, it sits above individual DC-DC converters, offering a complete power solution that reduces component count and board space. Key features include a wide input voltage range of 4.5V to 60V for the HV controller, low quiescent current for battery-powered applications, and four configurable LV buck converters with up to 8A total output current. The device supports multiple output configurations, allowing designers to tailor the power architecture to specific needs. Its high efficiency and low IQ make it ideal for always-on systems. Technically, the LTC3372 employs a current-mode control architecture for fast transient response and stable operation. The HV controller drives external N-channel MOSFETs, enabling high-power step-down conversion from elevated input voltages. The LV converters are fully integrated with internal power switches, simplifying design and reducing external component count. The device includes comprehensive protection features such as overcurrent and overtemperature shutdown. Typical applications include industrial power supplies, automotive infotainment systems, telecom equipment, and distributed power architectures. Its ability to handle high input voltages and provide multiple regulated outputs makes it suitable for systems requiring multiple supply rails from a single source. When designing with the LTC3372, careful attention must be paid to PCB layout for the high-current paths and the HV controller's gate drive signals. Proper decoupling and thermal management are essential to ensure reliable operation at maximum load.
LTC3410ESC6 - 300mA 2.25MHz Buck Regulator | Analog Devices
The Analog Devices LTC3410ESC6 is a 300 mA, 2.25 MHz synchronous step-down DC-DC regulator in a 6-lead SC70 package. It provides a positive, adjustable output down to a 0.8 V reference, uses integrated high-side and synchronous switches, and requires no external Schottky diode. Its small footprint makes it suitable for compact battery-powered, portable, communications, and embedded systems requiring efficient local rail regulation. A synchronous buck converter is a DC-DC voltage regulator that reduces a higher input voltage to a lower regulated output using inductive energy storage. The LTC3410 operates as a voltage-mode step-down regulator; its feedback reference supports low-voltage outputs, while its integrated synchronous switch improves conversion efficiency by avoiding the external catch diode used by older non-synchronous buck designs. The switching frequency is 2.25 MHz, which helps keep passive components small. Key verified features include one adjustable output, a 300 mA output-current rating, a 0.8 V output reference, and operation in the SC70 package identified by distributors as 6-TSSOP, SC-88, or SOT-363. The adjustable topology supports multiple rail requirements when the feedback divider is selected for the target voltage. The internal synchronous switch eliminates an external Schottky diode, reducing board area and assembly complexity. The datasheet also discusses inductor selection as an application-dependent tradeoff among price, size, and radiated-field or EMI requirements. Surface-mount inductors listed as suitable in the manufacturer documentation should be evaluated together with the switching frequency and output capacitance. Because the component is a switching regulator, layout quality directly affects current-loop behavior, output ripple, stability, and electromagnetic emissions. Typical uses include compact sensor nodes, portable instruments, communications modules, low-voltage digital rails, and battery-powered equipment. The 300 mA rating is suitable for moderate-load point-of-license or point-of-load conversion, not for high-current processor rails. Confirm the input range, output range, thermal limits, and compensation requirements against the complete manufacturer datasheet before finalizing a design. For layout, keep the inductor between the switching pins and the output node as recommended in the datasheet, place input decoupling close to the supply pins, and use a compact feedback loop. Verify ripple, startup behavior, load transients, and exposed-pad or ground-return arrangements in the actual board layout. This page combines verified product information, practical application guidance, and substitution constraints without inventing values not present in the supplied sources.
LTC3410ESC6-1.2 - 300mA 2.25MHz Buck Regulator | ADI
The Analog Devices LTC3410ESC6-1.2 is a fixed 1.2V, 300mA synchronous step-down DC-DC buck regulator switching at 2.25MHz in a 6-pin SC-70 package, also identified as SC-88 or SOT-363. It accepts a 2.25V to 5.5V input range and uses a synchronous architecture to provide efficient, compact regulation. A buck converter is a switching DC-DC converter that steps a higher input voltage down to a lower regulated voltage using controlled switching of an inductor and energy-storage components. The LTC3410 belongs to the hierarchy of DC-DC converter, voltage regulator, and power-management IC. Its high switching frequency permits small inductors and capacitors, making it useful where PCB area and load-transient response are important. The main features are 300mA rated output current, fixed 1.2V operation, 2.25MHz internal switching frequency, and a 2.25V to 5.5V supply range. According to the Analog Devices product page, the LTC3410 family supports outputs from 0.8V to 5V, with the selected -1.2 suffix fixing this version at 1.2V. The family also offers high-efficiency operation, low-dropout behavior through 100% duty-cycle operation, and Burst Mode for low output ripple and reduced light-load consumption. The synchronous implementation avoids an external Schottky diode and supports compact power conversion around single-cell Li-ion systems. At a 3V input, one verified source reports up to 380mA minimum peak-switch-current capability for another listed family condition, but the specified product rating for LTC3410ESC6-1.2 remains 300mA. Designers should use the manufacturer datasheet for absolute maximum ratings, compensation details, efficiency curves, and thermal limits. Typical applications include single-cell Li-ion battery rails, portable sensors, compact wireless peripherals, low-voltage digital processors, handheld measurement equipment, and IoT devices powered from 3.3V or single-cell sources. The fixed 1.2V output is particularly useful for low-voltage core rails where space, efficiency, and predictable external component selection matter. The principal design consideration is inductor and capacitor selection around the 2.25MHz switching frequency. Keep the switching loop compact, use recommended high-frequency components, and verify output ripple, startup behavior, efficiency, and thermal performance across the intended input and load range. Pin assignments and unused-pin requirements must be checked against the manufacturer datasheet before PCB release. This page combines verified distributor and manufacturer information with focused design guidance. It also distinguishes confirmed public data from parameters that still require datasheet confirmation, helping engineers source and evaluate the regulator without inserting unverified values into a design.
LTC3410ESC6-1.875#TRPBF - 1.875V 300mA Buck Regulator
The Analog Devices LTC3410ESC6-1.875#TRPBF is a fixed-output, 300mA synchronous step-down DC-DC converter with a 1.875V output, 2.25MHz switching frequency, and 6-pin SC-70 package. It is designed for compact systems requiring efficient regulation from a 2.5V to 5.5V input source. The converter uses an internal synchronous switch to improve efficiency and eliminate an external Schottky diode. A synchronous buck converter is a switching voltage regulator that reduces an input voltage to a lower regulated output using controlled high-frequency switching. It belongs to the DC-DC converter category, which is part of power management integrated circuits. Synchronous operation is especially useful in portable and space-constrained equipment because it can provide high conversion efficiency with fewer external components. The LTC3410ESC6-1.875#TRPBF provides a fixed 1.875V output, supports up to 300mA, and operates at approximately 2.25MHz. Verified distributor information also identifies low-ripple Burst Mode operation, a 26µA quiescent current specification, efficiency up to 96%, and output ripple around 20mV peak-to-peak under specified conditions. These characteristics suit battery-powered, sensor, portable-instrument, and embedded low-voltage rail applications. The fixed 1.875V version is appropriate when the downstream circuit requires a stable low-voltage rail without external feedback adjustment. The 6-pin SC-70 package minimizes board area, while the high switching frequency helps keep passive components compact. Designers should verify inductor selection, capacitor ripple current, thermal conditions, and startup behavior against the manufacturer datasheet for the intended VIN, VOUT, and load conditions. This page summarizes verified manufacturer and distributor information, practical application guidance, comparison criteria, and drop-in alternatives that may help engineers evaluate the LTC3410ESC6-1.875#TRPBF for compact low-power power designs.
LTC3630AMPDHC#PBF - 76V 500mA Sync Buck Converter | Analog Devices
The Analog Devices LTC3630AMPDHC#PBF is a high-efficiency, 76V-tolerant 500 mA synchronous step-down DC/DC converter that draws only 12 µA typical DC supply current at no load, housed in a thermally-enhanced 16-lead (5 mm x 3 mm) plastic DFN exposed-pad (DHC) package with an extended -55°C to +150°C MP-grade operating junction temperature range. It accepts a wide 4 V to 76 V input range and supports both user-adjustable output (0.8 V to VIN via external feedback resistors) and factory-programmed fixed outputs of 1.8 V, 3.3 V, and 5 V, making it a flexible point-of-load regulator for industrial, automotive, and battery-powered systems. Key specifications include 500 mA continuous output current, internal high-side and synchronous switches that eliminate the external Schottky diode, Burst Mode operation for high efficiency at light loads, and an internal feedback comparator output that allows multiple LTC3630A units to be paralleled for higher current rails. The 12 µA quiescent current makes it particularly suited to always-on applications that must conserve standby energy, while the 76 V input withstand gives significant headroom for 48 V telecom rails, 24 V industrial buses, and transient-prone automotive load-dump environments. The architecture uses a constant-frequency current-mode control loop with a precision reference and programmable or fixed internal feedback divider; the exposed die-attach pad (DFN-EP) provides a low thermal resistance path from the junction to the PCB copper, allowing sustained 500 mA output in the small DFN-16 outline. The DHC suffix indicates the 5 mm x 3 mm DFN-16 with EP, while the 'MP' prefix designates the military plastic grade with -55°C to +150°C TJ range, distinguishing it from the standard LTC3630AHDHC#PBF which is rated to -40°C to +125°C. Typical applications include 48 V telecom point-of-load conversion, 24 V industrial sensor and actuator supplies, automotive body and chassis electronics surviving load-dump transients, battery-powered metering and remote-sensor nodes with low standby budgets, distributed low-voltage rails in factory automation, and as a post-regulator following an isolated front-end supply. The 76 V input is wide enough to absorb inductive transients without a TVS clamp in many cases. When designing with this device, place the input capacitor as close as possible to the VIN and PGND pins to minimize switching-node parasitic inductance; the exposed pad must be soldered to a continuous ground copper plane that doubles as a thermal sink. Carefully evaluate output-ripple, inductor selection (typically 47 µH to 100 µH), and feedforward-cap placement per the manufacturer datasheet typical application circuit to avoid sub-harmonic instability or unexpected Burst Mode hysteresis.
LTC3633AIUFD - Dual 3A 20V Sync Buck Regulator | Analog Devices
The Analog Devices LTC3633AIUFD is a high-efficiency dual-channel monolithic synchronous buck regulator that delivers up to 3A continuous output current per channel from a 3.6V to 20V input supply. Housed in a 28-lead 4mm × 5mm WFQFN exposed-pad package, the device uses a controlled on-time, current-mode architecture with phase-lockable switching frequency selectable from 500 kHz to 4 MHz. The two channels can be run 180 degrees out of phase to relax input and output capacitance requirements. A buck (step-down) switching regulator is a DC-DC converter that uses an energy-storage inductor and synchronous MOSFET switches to produce a lower regulated output voltage from a higher input rail with efficiencies typically above 90 percent. Synchronous buck regulators replace the external Schottky diode with an internal low-side MOSFET, reducing conduction loss and improving thermal performance at high output currents. The buck regulator category sits within the broader hierarchy of switching regulators -> DC-DC converters -> power management ICs -> semiconductor devices. Key features include 0.6V minimum adjustable output, 95 percent maximum efficiency, 1.2 mA quiescent current in Burst Mode operation, programmable soft-start, internal compensation, and a power-good indicator. Each channel supports output voltages from 0.6V to VIN and integrates high-side and low-side MOSFETs rated for 20V operation. The exposed pad provides low thermal resistance, allowing sustained 3A per channel in space-constrained PCB layouts. The LTC3633A family is offered in three output-voltage-sense variants: LTC3633A (0.6V to 6V VFB reference), LTC3633A-1 (0.6V to VIN VFB reference), and LTC3633A-2 (programmable fixed output). All variants share the same 28-pin WFQFN exposed-pad package and pinout, making them drop-in compatible for BOM flexibility. The 28-WFQFN package with thermal pad enables high-current dual-rail designs without external heatsinking at moderate duty cycles. Typical applications include distributed power systems, battery-powered instruments, point-of-load supplies, portable electronics, and FPGA/DSP/microprocessor core and I/O rails. The wide 3.6V to 20V input range suits single-cell to multi-cell lithium-ion packs as well as 5V and 12V industrial bus rails. When designing with the LTC3633AIUFD, select the inductor based on the chosen switching frequency to maintain ripple within 30 percent of peak-to-peak inductor current, and place input ceramic capacitors as close as possible to the VIN and PGND pins to minimize switching-loop inductance. This page synthesizes distributor pricing, same-brand drop-in variants, and practical design notes not found in the manufacturer datasheet alone.
LTC3636EUFD - Dual 6A, 20V Sync Step-Down DC/DC | Analog Devices
The Analog Devices LTC3636EUFD is a high-efficiency, dual-channel monolithic synchronous step-down (buck) DC/DC regulator delivering up to 6A per channel from a 3.1V to 20V input rail, housed in a 28-pin QFN-EP (4mm x 5mm) package with an exposed thermal pad. It uses a controlled on-time current-mode architecture with a phase-lockable switching frequency programmable from 500 kHz to 4 MHz, and an internal 2 MHz default when the RT pin is tied to INTV_CC. A synchronous buck regulator (also called a step-down converter) is a switching power topology that reduces a higher DC input voltage to a lower, regulated DC output voltage with very high efficiency by alternately storing energy in an inductor and releasing it into the load. The LTC3636EUFD belongs to the monolithic synchronous buck regulator family, sitting within the broader DC/DC converter class, the voltage regulator category, and ultimately the power management integrated circuit hierarchy used in nearly every battery-powered or point-of-load application. Key features include two independent 6A output channels, an adjustable output range from 0.6V to 5V, 95% peak efficiency, programmable soft-start, and an operating temperature range of -40C to +125C. The exposed pad package delivers low thermal resistance for continuous high-current operation, while the wide 3.1V to 20V input range makes it well suited to lithium-ion battery stacks and 12V or 5V point-of-load rails. The controlled on-time current-mode architecture provides fast transient response and allows the LTC3636EUFD to operate with very small ceramic output capacitors, simplifying board layout and reducing BOM cost. Its phase-lockable frequency can be synchronized to an external clock, enabling parallel-channel interleaving to minimize input ripple when both channels are combined. Typical applications include point-of-load regulation for FPGAs, ASICs, DSPs, and microprocessors from 12V or 5V buses, industrial distributed power systems, battery-powered portable equipment, and multi-rail telecom/datacom boards where two independent high-current low-voltage rails are required from a common input source. When designing with the LTC3636EUFD, select low-ESR ceramic input and output capacitors rated for the worst-case ripple current, and place the inductor close to the SW node to minimize switching losses and EMI. The exposed pad must be soldered to a sufficiently large copper pour for thermal dissipation at 6A continuous load. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.
LTC3786EMSE#TRPBF - 38V Sync Boost Controller, 1A Driver | ADI
The Analog Devices LTC3786EMSE#TRPBF is a high-performance synchronous boost converter controller that drives all N-channel power MOSFETs from a 4.5V to 38V input, packaged in a thermally-enhanced 16-MSOP-EP (MSE) with exposed pad. It operates at user-programmable switching frequencies from 105 kHz to 760 kHz, or can be synchronized to an external PLL clock, and provides one positive output suitable for boost, flyback, or SEPIC topologies. The internal 1.2V reference and PLLIN/MODE pin enable Burst Mode, pulse-skipping, or forced continuous inductor current modes at light load. It includes a power-good output indicator, programmable soft-start on the SS pin, and a robust MOSFET gate driver stage sized for high-current applications. A synchronous boost DC-DC controller is a current-mode PWM controller that uses an external N-channel MOSFET for the synchronous rectifier instead of a Schottky diode, significantly improving efficiency at high currents and reducing thermal dissipation. Controllers sit between simple switching regulators (which integrate the power switches) and discrete analog PWM implementations (which require extensive external compensation), offering a balance of flexibility and integration. Within power management ICs, this part belongs to the DC-DC switching controller family, used when output voltages exceed the input rail or when high step-up ratios are required. Key specifications include a wide 4.5V to 38V input voltage range, an output voltage that can be set up to 60V (limited by external MOSFET rating), a precision 1.2V ±1% reference, sub-100 µA Burst Mode quiescent current, and integrated bootstrap supply for the high-side gate driver. The constant-frequency current-mode architecture provides cycle-by-cycle current limiting and easy loop compensation. The MSOP-EP package features an exposed die-attach pad, reducing θJA for better thermal performance at high gate-drive power levels. The PLLIN/MODE pin accepts an external clock for noise-sensitive multi-rail systems. Typical applications include high-power LED drivers, automotive start-stop systems (where the battery drops to 4.5V and requires boosting back to 12V or higher), battery-powered industrial equipment, PFC pre-regulators, and high-voltage bias supplies for LCD/AMOLED panels, audio amplifiers, and RF power amplifiers. The wide input range also suits solar MPPT front ends and 24V industrial bus systems. When designing with the LTC3786, ensure the SS capacitor is sized to match output capacitance and inrush limits, place the boot capacitor close to the BST/SW pins, and use a low-ESR ceramic bypass on VC and VCC rails. Choose MOSFETs with appropriate VDS ratings for your maximum output voltage, and verify the inductor saturation current exceeds the peak current limit.
LTC3786IMSE#PBF - Low IQ Sync Boost Controller, 38V, MSOP-16 | ADI
The Analog Devices (formerly Linear Technology) LTC3786IMSE#PBF is a high-performance synchronous boost controller IC that drives all N-channel power MOSFETs, housed in a 16-pin MSOP-EP (Exposed Pad) package. Operating as a Step-Up, Step-Up/Step-Down DC-DC controller, it supports boost, flyback, and SEPIC topologies from a 4.5V to 38V input range with adjustable output voltage up to 60V. Its switching frequency is programmable from 50 kHz to 900 kHz, and the quiescent current is specified at 55 uA. A boost converter controller is a type of DC-DC switching controller IC that falls within the power management semiconductor family. In the system hierarchy it sits between the discrete MOSFETs/inductor and the digital load - it is a controller (not a converter), meaning external pass elements are required. Synchronous rectification (using an N-channel MOSFET in place of a Schottky diode) increases efficiency, reduces power losses, and eases thermal requirements compared with asynchronous boost designs, allowing the LTC3786IMSE#PBF to deliver higher output current than diode-rectified alternatives of similar size. Key features include 55 uA quiescent current for battery-friendly operation, 5 A output current capability, an output voltage range up to 60 V, a wide 4.5 V to 38 V input range, and a programmable oscillator from 50 kHz to 900 kHz. The MSOP-16-EP package offers an exposed thermal pad for low thermal resistance. The part is qualified for the industrial -40 C to +125 C junction temperature range and is lead-free (Pb-free) with RoHS compliance. The LTC3786IMSE#PBF uses a constant-frequency current-mode control architecture with cycle-by-cycle current limiting, internal soft-start, and a precision 1.200 V reference. The synchronous driver outputs allow operation at very high duty cycles needed to deliver high output voltages from low input rails, making it well suited for 12 V or 24 V industrial bus boost applications. Typical applications include boost converters for automotive and industrial 24 V systems, SEPIC adapters for USB Type-C PD sources, flyback-derived bias supplies, and battery-powered portable equipment. The wide 4.5 V to 38 V input range allows direct connection to 12 V and 24 V nominal rails. When designing with this part, pay attention to the inductor saturation current at peak load (set by the current-sense resistor and the controller's current-limit comparator), and place the BST and SW bootstrap capacitors as close as possible to the IC. The exposed pad must be soldered to a sufficiently large copper pour to keep junction temperature within the 125 C limit. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
LTC3788IGN-1 - 2-Phase Dual Sync Boost Controller | Analog Devices
The Analog Devices LTC3788IGN-1 is a high-performance 2-phase dual output synchronous boost converter controller that drives all N-channel power MOSFETs, housed in a 28-pin SSOP (GN) package with thermally enhanced exposed pad. It operates from a 4.5V to 38V input supply range and supports output voltages up to 60V, with the -1 variant differing from the standard LTC3788 in oscillator phase and synchronization behavior. Synchronous rectification increases efficiency, reduces power losses, and eases thermal requirements, allowing the LTC3788-1 to be used in high power boost applications. A boost (step-up) DC-DC controller is a switching regulator topology whose output voltage is always greater than its input voltage. It uses an inductor, a power switch, and a rectifier to first store energy in the inductor then release it into the output capacitor at a higher voltage. A controller (as opposed to a converter) only provides the gate-drive and feedback signals, while the actual power devices (MOSFETs) are external to the IC. The "2-phase" architecture means two parallel power stages are operated 180 degrees out of phase, which halves the input ripple current, doubles the effective ripple frequency, and reduces input capacitor stress - making it ideal for high-current applications. The "synchronous" part means the rectifier diode is replaced by a MOSFET, lowering conduction losses especially at high current and large duty cycles. Key features of the LTC3788-1 include a precision 1.2V reference, dual power good output indicators, programmable current limit, and adjustable operating frequency that can be synchronized to an external clock. The 28-SSOP package offers a compact footprint suitable for industrial power supplies, automotive systems, and battery-powered equipment where high step-up ratios are needed. The wide 4.5V to 38V input range encompasses most battery chemistries including single-cell Li-ion, multi-cell lead-acid, and 24V industrial rails. The architecture uses a peak current-mode control loop, which simplifies loop compensation, provides inherent cycle-by-cycle current limiting, and eases paralleling of multiple phases. Phase shedding at light load and adaptive dead-time control optimize efficiency across the load range. The LTC3788-1 also features soft-start programmability and output voltage tracking for multi-rail sequencing. Typical applications include high-power LED drivers, automotive start-stop systems, 24V to 48V industrial bus boost, TFT LCD bias supplies, and battery-powered portable equipment where step-up conversion is required. The dual-phase architecture especially shines in applications drawing more than 10A continuous, where single-phase solutions would require excessively large inductors. When designing with the LTC3788-1, attention to PCB layout is critical because switching nodes can exceed 60V with high di/dt. Keep the high-current loop area minimal, use a ground plane, and place input capacitors close to both MOSFET half-bridges. Use the exposed pad of the SSOP-28 GN package for proper thermal dissipation; failure to do so may cause thermal shutdown at high output power. This page synthesizes distributor pricing, datasheet specifications, pinout, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet alone.
LTC3871ELXE#PBF - Bi-Directional Buck/Boost Controller | ADI
The Analog Devices LTC3871ELXE#PBF (originally Linear Technology) is a high-performance bidirectional buck or boost switching regulator controller IC that operates in either buck or boost mode on demand, housed in a 48-lead eLQFP (7x7 mm) package with exposed pad. It regulates in buck mode from V_HIGH to V_LOW and in boost mode from V_LOW to V_HIGH depending on a control signal, making it ideal for 48 V/12 V automotive dual-battery systems, supercapacitor backup, and high-power portable battery sharing. The LTC3871ELXE#PBF uses two positive current sense pins (SNSD+ and SNSA+) to acquire signals and process them internally to provide a response equivalent to a DCR sense signal with approximately 14 dB (5x) signal-to-noise ratio improvement. A bidirectional DC-DC controller is a switching regulator topology that allows power to flow in either direction between two voltage rails, automatically selecting buck (step-down) or boost (step-up) operation based on which rail is higher. This makes the part a power management IC within the broader hierarchy of switching controllers -> DC-DC controllers -> PMICs -> semiconductors. By consolidating two unidirectional regulators into one IC, bidirectional controllers reduce component count, board area, and BOM cost for dual-rail systems. Key features of the LTC3871ELXE#PBF include PolyPhase operation for high-current applications, accurate current programming loop that regulates maximum average inductor current, and an operating frequency that can be synchronized to an external clock. The controller is built on a BiCMOS process and supports automotive temperature grades (E = -40C to +125C). The LTC3871ELXE#PBF differs from the LTC3871ELXE-1#PBF variant primarily in the current-sense amplifier gain and polarity configuration. Typical applications include 48 V/12 V automotive dual-battery systems, high-power battery sharing between a primary and backup source, supercapacitor backup power with active charge balancing, and PolyPhase parallel operation for >100 A rails. The wide input range up to 100 V (LTC3871 family) supports industrial 24/48 V bus systems, telecom -48 V rails, and USB-PD source applications. The PolyPhase architecture enables multiple LTC3871 controllers to be interleaved for higher current capability. When designing with the LTC3871ELXE#PBF, ensure proper PCB layout for the high-current power loop and keep the SNSA+/SNSD+ differential sense traces short and matched. Use a low-ESR ceramic input capacitor close to the high-side MOSFET source and verify current-sense resistor or DCR network timing against the datasheet typical application. This page synthesizes distributor pricing, drop-in alternative MPNs, and engineering design notes not found in the manufacturer datasheet.
LTC3882-1 - Dual Output PolyPhase Step-Down Controller | Analog Devices
The LTC3882-1 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with a PMBus compliant serial interface, manufactured by Analog Devices. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages from 0.1V to 5.25V using a wide range of 3.3V compatible power stages. Up to four LTC3882-1 devices can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation, enabling scalable power solutions for high-current applications. A switching regulator controller is an integrated circuit that manages the power conversion process in a DC-DC step-down (buck) converter. Unlike a linear regulator, it uses high-frequency switching of power transistors to efficiently step down voltage, making it ideal for high-current applications where efficiency and thermal management are critical. The LTC3882-1 belongs to the family of digital power system management controllers, which combine analog regulation with digital monitoring and control via PMBus, allowing precise voltage and current management in complex systems. Key features include a PMBus compliant serial interface for system configuration and monitoring, readback of input voltage, output voltage, current, temperature, and fault status. The device supports sub-milliohm DCR sensing for accurate current measurement without high-power sense resistors. It also features constant frequency operation with leading-edge modulation for excellent transient response. The LTC3882-1 is available in a 40-pin QFN package, suitable for compact power designs. Technically, the LTC3882-1 integrates a digital power system management engine with analog control loops, enabling precise regulation and telemetry. The voltage mode architecture provides stable operation with a wide range of output capacitors. The PMBus interface allows real-time monitoring and configuration, reducing the need for external components and simplifying system design. The device operates from a 3.3V bias supply and can drive external power stages, making it flexible for various topologies. Typical applications include high-current point-of-load converters for servers, networking equipment, and data centers, where multiple phases are needed to deliver currents exceeding 100A. It is also used in industrial and telecommunications systems requiring precise voltage regulation and digital monitoring. The LTC3882-1's ability to parallel multiple devices makes it ideal for scalable power architectures. When designing with the LTC3882-1, ensure proper decoupling of the bias supply and careful layout of the power stage to minimize parasitic inductance. Use the LTpowerPlay software tool for system configuration and monitoring, which simplifies the design process and ensures optimal performance.
LTC3882-1#PBF - Dual 8-Phase Digital Power Controller | Analog Devices
The LTC3882-1#PBF is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with a PMBus compliant serial interface, manufactured by Analog Devices (formerly Linear Technology). It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. The device is available in a 40-QFN (6x6) package and is designed for high-current, multi-phase power supply applications. A digital power controller is a specialized power management IC that combines analog switching regulator control with digital monitoring and control via a serial bus such as PMBus or I2C. It sits within the hierarchy of power management ICs, specifically under DC-DC converters and switching controllers. The LTC3882-1 integrates digital power system management, allowing real-time telemetry of voltage, current, and temperature, as well as configuration of output voltages, sequencing, and fault limits through the PMBus interface. Key features include dual output channels, each capable of driving up to 8 phases for high-current applications, a wide input voltage range, and a PMBus-compliant interface for digital control and monitoring. The device supports constant frequency operation with leading-edge modulation, ensuring stable and efficient power conversion. It also includes programmable loop compensation, fault protection, and telemetry for comprehensive power management. Technically, the LTC3882-1 employs a voltage mode control architecture with leading-edge modulation, which provides excellent transient response and simplifies loop compensation. The digital interface allows precise output voltage setting, margining, and sequencing, making it ideal for complex systems requiring dynamic voltage scaling. The device operates over a junction temperature range of -40°C to 125°C, with the -1E version guaranteed from 0°C to 85°C. Typical applications include high-performance computing, networking equipment, telecommunications infrastructure, and industrial systems where multiple high-current rails need precise digital control. The LTC3882-1 is particularly suited for FPGA, ASIC, and processor power supplies that demand high efficiency and accurate voltage regulation. When designing with the LTC3882-1, ensure proper decoupling and layout for the high-frequency switching signals. The PMBus interface requires careful attention to I2C addressing and bus timing. Additionally, the power stage components (MOSFETs, inductors, capacitors) must be selected to meet the transient and efficiency requirements of the application.
LTC3882-2 - Dual PMBus Buck Controller | Analog Devices
The LTC3882-2 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with a PMBus-compliant serial interface, manufactured by Analog Devices (formerly Linear Technology). It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. The device supports up to four LTC3882-2 controllers operating in parallel for 2-, 3-, 4-, 6- or 8-phase operation, enabling high-current, multi-phase power supplies with precise digital control and monitoring. A DC/DC switching regulator controller is an integrated circuit that manages the power stage of a switching converter, generating the PWM signals that drive external MOSFETs to step down a higher input voltage to a regulated lower output voltage. Unlike a linear regulator, it achieves high efficiency by switching power devices on and off, making it essential for power-hungry applications such as servers, telecom, and industrial systems. The LTC3882-2 belongs to the family of digital power management controllers, which combine analog regulation with digital configuration and telemetry via PMBus. Key features include a wide input voltage range of 4.5V to 24V, dual outputs with programmable output voltages from 0.5V to 5.5V, and a PMBus interface for configuration and monitoring. The device integrates high-side and low-side gate drivers, supports external MOSFETs for high-current applications, and provides accurate current sensing and temperature monitoring. It also features programmable switching frequency, soft-start, and fault protection, making it a versatile solution for complex power systems. Technically, the LTC3882-2 employs a voltage mode control architecture with leading-edge modulation, which provides excellent noise immunity and fast transient response. The PMBus interface allows real-time readback of input voltage, output voltage, output current, temperature, and fault status, enabling sophisticated power management and telemetry. The device is available in a 40-pin QFN package (6mm x 6mm) and operates over a junction temperature range of -40°C to +125°C. Typical applications include high-current FPGA and ASIC power supplies, server and datacenter power distribution, telecom and networking equipment, and industrial power systems. The LTC3882-2 is ideal for designs requiring precise voltage regulation, high efficiency, and digital control and monitoring capabilities. When designing with the LTC3882-2, ensure proper PCB layout for the high-current paths and adequate thermal management for the external MOSFETs. The PMBus interface simplifies configuration and monitoring, but careful attention to the I2C address and bus timing is required for reliable communication.
LTC3882-2#PBF - Dual PolyPhase Step-Down Controller | Analog Devices
The LTC3882-2#PBF is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with a PMBus-compliant serial interface, manufactured by Analog Devices (formerly Linear Technology). It operates at a constant frequency of up to 2.5MHz, using a leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. The device is housed in a 40-pin QFN (6x6mm) package and is designed for high-current, multi-phase power supply applications. A DC/DC switching controller is an integrated circuit that manages the switching of external power MOSFETs to convert an input voltage to a regulated output voltage. Unlike a monolithic regulator, a controller does not include the power switches, allowing for higher efficiency and scalability. The LTC3882-2 is part of the digital power management family, combining analog voltage mode control with digital configuration and monitoring via PMBus, enabling precise voltage and current control, fault management, and telemetry. Key features include dual output channels, each capable of multi-phase operation (up to 8 phases when paralleling four devices), a PMBus-compliant I2C serial interface for configuration and monitoring, and support for input voltage, output voltage, current, temperature, and fault status readback. The device operates from a 4.5V to 24V input supply and provides an adjustable output voltage range of 0.5V to 5.5V. It includes integrated drivers for external N-channel MOSFETs, a precision reference, and comprehensive protection features such as overvoltage, undervoltage, and overcurrent protection. The LTC3882-2 uses a constant frequency, leading-edge modulation, voltage mode architecture, which provides excellent transient response and output regulation. The device supports PolyPhase operation, allowing up to four LTC3882-2s to operate in parallel for 2-, 3-, 4-, 6-, or 8-phase configurations, reducing input and output ripple and enabling high-current applications. The PMBus interface allows real-time monitoring and configuration, and the LTpowerPlay software tool simplifies system setup and debugging. Typical applications include high-current FPGA, ASIC, and processor power supplies, telecom and networking equipment, and industrial systems requiring precise voltage regulation and digital power management. The device is ideal for applications where efficiency, accuracy, and remote monitoring are critical. When designing with the LTC3882-2, ensure proper layout of the power stage and decoupling capacitors, and use the PMBus interface for configuration and monitoring. The device requires external MOSFETs, inductors, and compensation components, and careful thermal management is essential for high-current operation.
LTC3884EUK - Dual PolyPhase Step-Down DC/DC Controller | ADI
The Analog Devices LTC3884EUK is a dual output PolyPhase synchronous step-down DC/DC switching regulator controller with I2C-based PMBus compliant serial interface, housed in a 48-pin QFN (7x7 mm) package. It operates from 4.5V to 38V VCC supply, supports switching frequencies of 200 kHz to 1 MHz, and provides two positive step-down buck outputs suitable for sub-milliohm DCR current sensing in high-current point-of-load rails. What is a digital PWM controller? A digital PWM (pulse-width modulation) controller with PMBus is a power management IC that uses a high-speed analog control loop to regulate output voltage while exposing a digital serial interface (PMBus/I2C) for telemetry, fault management, and on-the-fly reconfiguration by a system host. In the system hierarchy, it sits between a DC-DC converter (the power stage) and the system power manager (often the same chip), forming a key node in any digitally-managed intermediate bus or POL architecture for telecom, datacom, and industrial equipment. Key features include constant-frequency current mode architecture, sub-milliohm DCR sensing for accurate current share, integrated MOSFET drivers, programmable loop compensation, and comprehensive fault protection including overcurrent, overvoltage, and overtemperature. The I2C/PMBus interface supports output voltage margining, sequencing, telemetry of VIN/VOUT/IOUT/Temperature, and storage of configuration parameters in internal EEPROM with ECC, simplifying in-system calibration and manufacturing test. The LTC3884EUK employs a proprietary current mode architecture that enables accurate cycle-by-cycle current sharing across multiple paralleled phases, eliminating the need for expensive current-sense resistors in high-current applications. Internal 10-bit ADC sampling on each output rail provides digital telemetry at up to 1 kHz update rate, suitable for real-time system health monitoring and predictive maintenance in networking and storage equipment. Typical applications include telecom and datacom point-of-load regulation, FPGA/ASIC/DSP core and I/O rails in high-density computing boards, industrial automation power systems, and test & measurement instrumentation where digital power management with telemetry is essential. Communication infrastructure and server boards commonly deploy LTC3884EUK in 60-200A POL applications to achieve the density and telemetry required for advanced power optimization. When designing with the LTC3884EUK, careful PCB layout of the differential DCR sense lines is critical to maintain current-share accuracy; the sense traces must be routed as a matched pair with Kelvin connection to the inductor. The exposed pad (EP) must be soldered to a sufficiently large copper pour (>=1 sq inch on top layer recommended) to keep the controller within thermal limits under high-side gate charge losses. This page synthesizes distributor stock, parametric cross-reference data, and application circuit guidance not collected in the manufacturer datasheet alone, enabling faster drop-in alternative selection and system-level design decisions.
LTC3884IRHE-1 - Dual-Output PolyPhase PMBus Buck Controller | ADI
The Analog Devices LTC3884IRHE-1 is a dual-output PolyPhase synchronous step-down DC/DC switching regulator controller with an I2C-based PMBus-compliant serial interface, housed in a 48-pin GQFN-EP (5x6 mm) package with exposed pad. It accepts a 4.5V to 38V input supply, drives two outputs up to 1 MHz switching frequency, and supports sub-milliohm DCR current sensing for highest efficiency at heavy load. The LTC3884-1 variant provides three-state PWM outputs to interface with external power-stage blocks or DrMOS stages. A switching regulator controller is an IC that drives external power MOSFETs to convert one DC voltage to another. Buck (step-down) controllers specifically produce a lower output rail from a higher input rail, and PolyPhase architectures interleave multiple phases to reduce input ripple, shrink output inductors, and spread thermal dissipation. Controllers (vs. regulators) require external FETs, inductors, and capacitors, allowing the designer to optimize for currents above 5 A and to choose MOSFETs for a specific efficiency target. Key features include ±0.5% output voltage accuracy over temperature, integrated 16-bit ADC telemetry for VIN/IOUT/Temperature/IOUT per phase, EEPROM for configuration storage, fault logging with 14-event black box, and per-rail loop compensation. The constant-frequency current-mode architecture simplifies feedback compensation and enables accurate PolyPhase current sharing. PMBus commands allow real-time VOUT margining, sequencing, and fault response without external hardware changes. The LTC3884-1 architecture separates the controller logic from the power stage. PWM outputs use a three-state protocol (high, low, Hi-Z) so that the same controller can directly drive ADI Power Blocks (e.g., LTM4601 family), discrete DrMOS power stages, or discrete MOSFET bridges. This makes the LTC3884-1 the preferred choice when a system already has a fixed power-stage IC chosen for size or cost reasons. Typical applications include 12 V to point-of-load conversion in telecom and datacom boards, intermediate bus conversion in FPGA and ASIC evaluation platforms, and digitally-managed POL rails in industrial test equipment. The wide 4.5 V to 38 V input tolerates industrial 24 V and 28 V avionics busses. PMBus telemetry allows remote monitoring of rail health, while the integrated black-box fault log accelerates root-cause analysis in field returns. When designing with the LTC3884IRHE-1, ensure the input supply decouples at the IC pins with 1 µF and 0.1 µF ceramic capacitors in parallel, place the differential DCR sense filter within 5 mm of the inductor sense points, and verify the GQFN-EP thermal pad has at least 25 thermal vias to the inner ground plane. The exposed pad is the primary heat path and must be soldered to the PCB for rated thermal performance. This page synthesizes distributor pricing from DigiKey, Mouser, Arrow, and LCSC, drop-in alternatives drawn from the same GQFN-48 family, and practical design notes that go beyond the manufacturer datasheet. Prices referenced below are as of 2026-10-09.