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TPSM81033VCDR - 2A 2.4MHz Synchronous Boost Module | TI
The Texas Instruments TPSM81033VCDR is a 5.5V, 2A synchronous boost power module using TI MagPack packaging technology, integrating a 0.43uH power inductor, power MOSFETs, and control circuitry into a 2.6mm x 2.5mm QFN-FCMOD (9) package. It accepts 1.8V to 5.5V input and delivers a 2.2V to 5.5V output with a 2A typical valley switching current limit. A boost converter (step-up switching regulator) is a DC-DC converter that raises an input voltage to a higher regulated output by storing energy in an inductor and releasing it at higher voltage through a switching FET. Boost converters form part of the power management IC hierarchy and are essential wherever battery voltage is lower than the load rail, such as single-cell Li-ion or alkaline systems needing a 5V rail. Key features include the integrated inductor enabled by MagPack technology, 2.4MHz switching frequency that allows tiny external components and fast transient response, fixed 5.0V output option by connecting FB to AVIN, selectable light-load mode (auto PFM or forced PWM) via the MODE pin, and power-good output. Protection features include 5.75V output overvoltage protection, output short-circuit protection, and thermal shutdown. The device uses adaptive constant on-time valley-current-control topology, providing fast load transients and predictable behavior. Forced PWM mode trades light-load efficiency for constant switching frequency, important for noise-sensitive RF and analog rails. Typical applications include smart devices and portable battery-powered equipment, RF power amplifiers needing a stable 5V from Li-ion cells, and OLED or display bias supplies. The tiny footprint and minimum external component count make it ideal for space-constrained wearables and IoT devices. Design consideration: boost converter output current capability decreases as input voltage drops; verify the 2A valley current limit supports your load at minimum VIN, and follow the datasheet PCB layout for thermal performance of the exposed package.
TPSM81033VCDR - 2A, 2.4MHz Boost Power Module | TI
The Texas Instruments TPSM81033VCDR is a 5.5V, 2A, 2.4MHz synchronous boost power module using MagPack packaging technology. It integrates a 0.43uH power inductor, power switches, and control circuitry into a compact 2.6mm x 2.5mm QFN-FCMOD (9) package, providing a nearly complete DC-DC boost converter solution with a minimum of external components. A power module is a type of DC-DC converter that integrates the power inductor and MOSFETs of a switching regulator into a single surface-mount package, sitting within the broader hierarchy of power management ICs that also includes LDOs, buck converters, and controllers. By integrating magnetics, modules dramatically reduce solution size and simplify layout compared to discrete converter designs. Key features include a 1.8V to 5.5V input voltage range, an adjustable 2.2V to 5.5V output voltage range (with fixed 5.0V output when FB is connected to AVIN), a 2A valley switching current limit, and integrated 0.43uH power inductor with excellent thermal performance. The device operates at 2.4MHz switching frequency using an adaptive constant on-time valley-current-control topology, enabling small external components and fast transient response. The module offers two light-load modes selected via the MODE pin: automatic PFM mode for highest efficiency and forced PWM mode for fixed-frequency noise immunity. Protection features include 5.75V output overvoltage protection, output short-circuit protection, and thermal shutdown. A power good output supports power-rail monitoring and sequencing. Typical applications include battery-powered smart devices, portable equipment, Li-ion cell to 5V conversion, and point-of-load boost rails in compact electronics where board space is constrained. The small 2.6mm x 2.5mm footprint suits wearables and handheld instrumentation. Design consideration: because the current limit is a valley limit of 2A typical, verify peak inductor current under worst-case load, minimum input voltage, and maximum output power to avoid hitting current limit during load transients.
TPSM81033VCDR - 5.5V 2A Boost Power Module | Texas Instruments
The Texas Instruments TPSM81033VCDR is a 5.5V, 2A synchronous boost power module with MagPack packaging technology, integrating a 0.43uH power inductor and power MOSFETs in a compact 2.6mm x 2.5mm QFN-FCMOD (9) package. It operates from a 1.8V to 5.5V input and delivers an adjustable 2.2V to 5.5V output, with a fixed 5.0V option by connecting FB to AVIN. A boost converter is a DC-DC switching regulator that steps an input voltage up to a higher output voltage. It is essential in battery-powered systems where cell voltage falls below the required rail. The TPSM81033 belongs to the power module family within power management ICs, integrating the magnetic component and power stage to reduce design effort and board space versus discrete solutions. Key features include a 2A valley switching current limit, fixed 2.4MHz switching frequency for small external components and low ripple, and an integrated 0.43uH inductor with excellent thermal performance. Adaptive constant on-time valley-current-control topology regulates the output, while two light-load modes (auto PFM and forced PWM) selected via the MODE pin balance efficiency and noise immunity. Optional spread spectrum frequency modulation minimizes EMI. The synchronous rectifier architecture eliminates the external Schottky diode, improving efficiency, and the integrated inductor reduces parasitic losses and radiated EMI. Only input and output capacitors plus feedback resistors are required. Protection features include 5.75V output overvoltage protection, output short-circuit protection, thermal shutdown, and a power good output for sequencing in multi-rail systems. Typical applications include smart devices and portable equipment powered by batteries, IoT sensor power supplies, and TFT-LCD bias or OLED display rails. The wide input range and high switching frequency suit space-constrained designs. Design tip: ensure adequate input and output capacitance for stability and low ripple, and use the MODE pin to trade efficiency against noise. For a fixed 5V output, tie FB to AVIN per the datasheet layout guidelines.
TPSM82813 - 3A 6V Step-Down Power Module | TI
The Texas Instruments TPSM82813 is a synchronous step-down DC/DC power module with integrated inductor, delivering up to 3A output current from a 2.75V to 6V input supply. Available in QFN and MagPack (SIL) packages, output voltage is adjustable from 0.6V to 5.5V via external resistors. A step-down (buck) converter is a DC/DC power converter that efficiently reduces a higher input voltage to a lower regulated output. Power modules integrate the inductor and control circuitry into a single package, sitting one level above discrete buck converters in the power management IC hierarchy and dramatically reducing design effort and PCB area compared to controller-plus-inductor solutions. Key features include optional frequency synchronization, adjustable soft-start, and output voltage tracking for power sequencing. The device also offers spread spectrum for EMI reduction, a power good output, adjustable UVLO, and light-load efficiency mode. Efficiency reaches approximately 95%, minimizing losses in high-current point-of-load designs. Technically, the TPSM82813 uses a fixed-frequency peak current-mode control topology, providing fast transient response and stable loop behavior. The integrated inductor is optimized for low loss and contained EMI, while the MagPack package improves thermal performance. Thermal behavior is characterized on a JEDEC 51-7 defined PCB. Typical applications include point-of-load converters for FPGAs, DSPs, and ASICs, plus power supplies for telecommunication, test and measurement, medical, and industrial sensor equipment. The wide 2.75V-6V input supports 5V and 3.3V bus conversions, and the small footprint enables dense rail designs. Design tip: follow datasheet input/output capacitance recommendations, configure soft-start and tracking for your power-up sequence, and use thermal vias under the module per the recommended land pattern. Pricing as of 2026-08-30, see tiers below.
TPSM82816 - 6A Step-Down Power Module 2.7-6V | TI
The Texas Instruments TPSM82816 is a 2.7V to 6V input, 6A output synchronous step-down DC/DC power module with an integrated inductor, packaged in the compact MicroSiP (SIE) package. It belongs to the TPSM8281x family of pin-to-pin 1A, 2A, 3A, 4A, and 6A compatible modules, delivering high power density and ease of use for point-of-load (PoL) power supplies. A step-down power module is a complete DC/DC converter solution that combines the switching regulator, power MOSFETs, and magnetic components in a single package. Unlike discrete regulators that require separate inductor selection and layout optimization, power modules simplify design, shrink solution size, and reduce EMI and efficiency risk. Power modules sit within the power management IC hierarchy, bridging discrete converters and fully integrated PMICs. Key features include an adjustable output voltage from 0.6V to 5.5V via a single resistor divider, optional frequency synchronization to an external clock, adjustable soft-start, and output voltage tracking for rail sequencing. Peak efficiency exceeds 90% for typical 5V-to-1.8V conversions, with the shielded integrated inductor improving EMI behavior. The device is based on a fixed-frequency peak current-mode control topology, which provides fast transient response and stable operation with ceramic output capacitors. The package integrates everything needed for a minimal-footprint POL supply, and protection features include overcurrent, overvoltage, and thermal shutdown. The switching frequency can be programmed to trade efficiency against solution size. Typical applications include POL power for FPGAs, ASICs, and processors in telecommunication, test and measurement, medical, and industrial systems, where TI cites high power density and ease of use as primary benefits. Because the family is pin-to-pin compatible, a single PCB layout supports current tiers from 1A to 6A, simplifying BOM scaling across product variants. When designing with the TPSM82816, provide adequate input and output ceramic capacitance for stability and transient response, and use the SS/TRACK pin to sequence multiple rails in multi-voltage systems.
TPSM82822A - 2A Step-Down Module, Integrated Inductor | TI
The Texas Instruments TPSM82822A is a 5.5-V input, 2-A synchronous step-down converter power module with an integrated inductor and forced PWM mode, housed in a compact 2 x 2.5 x 1.1 mm MicroSiP (uSiP) package. It delivers an adjustable output from 0.6 V to 4 V, simplifying point-of-load power design. A step-down converter, or buck converter, is a switching voltage regulator that efficiently reduces a higher DC input voltage to a lower regulated output. Within the power management IC hierarchy, the TPSM82822A is a power module: it integrates the buck converter IC, power MOSFETs, and the magnetic inductor into one surface-mount package, collapsing an entire DC-DC solution into about 5 mm2 of board area. Key features include a 2.4 V to 5.5 V input range, 2 A continuous output current, forced PWM operation for constant 2.2 MHz switching frequency and predictable EMI, power-good output, enable pin, and internal soft-start. Efficiency reaches approximately 95% at typical loads, and the high operating frequency allows small external capacitors and low output ripple. Technically, the module uses a synchronous buck architecture with integrated low-DS(on) MOSFETs and a proprietary control scheme. Integrating the inductor inside the package minimizes parasitic loop inductance, reduces radiated EMI, and enables automated assembly with standard surface-mount equipment per the TPSM8282x datasheet. Typical applications include powering FPGAs, DSPs, ASICs, and MCUs in industrial systems, optical modules, solid-state drives, and portable devices where board space is at a premium. Forced PWM keeps output ripple low and constant-frequency, suiting noise-sensitive analog and RF rails. Design consideration: follow the datasheet input/output capacitor recommendations exactly for stability, and provide adequate thermal copper area for sustained 2 A loads; the module does not eliminate thermal design entirely.
TPSM828303 - 3A Low-EMI Buck Module 2.25-5.5V | Texas Instruments
The Texas Instruments TPSM828303 is a 3A synchronous step-down DC/DC power module with integrated inductor, operating from a 2.25V to 5.5V input and providing an adjustable output from 0.5V to 4.5V in a compact QFN (RDS) or MagPack (PVC) package. A DC/DC power module is a complete point-of-load power supply that integrates the controller, power MOSFETs, inductor, and compensation into a single surface-mount package. As a member of the buck (step-down) converter family within the broader power management IC hierarchy, it efficiently reduces a higher input voltage to a lower output voltage while minimizing external component count, layout effort, and design risk compared to discrete converter solutions. Key features include the DCS-Control topology for fast load transient response with small output capacitance, 1% feedback voltage accuracy over the full operating range, and integrated EMI reduction technologies that ease radiated emissions compliance. Automatic PWM/PFM transition maximizes light-load efficiency, and enable, power good, output discharge, and overcurrent protection functions simplify system integration. The TPSM828303 is pin-to-pin compatible with the 1A (TPSM828301) and 2A (TPSM828302) family members, enabling current-rating scalability on one PCB layout. The integrated inductor with MagPack magnetic shielding (TPSM828303APVCBR variant) reduces radiated EMI and board area versus discrete designs. Operation over a -40C to +125C junction range suits industrial environments. Typical applications include point-of-load (POL) power for FPGAs, DSPs, and ASICs, optical module supplies, test and measurement equipment, and noise-sensitive portable designs where low EMI is mandatory. Design tip: follow the datasheet input/output capacitance recommendations - the DCS-Control topology supports output capacitors up to 200uF, and the EN pin plus power good signal enable proper rail sequencing in multi-rail systems. Prices as of 2026-08-30.
TPSM82866A - 6A Step-Down Power Module | Texas Instruments
The Texas Instruments TPSM82866A is a 6A step-down power module with an integrated inductor, operating from a 2.4V to 5.5V input and providing an adjustable output from 0.6V to 5.5V. It comes in a 3.5mm x 4.0mm thin overmolded QFN package (RDJ), integrating a synchronous buck converter and shielded inductor for a compact point-of-load solution. A step-down power module is a complete DC-DC converter solution that integrates the controller, power FETs, and inductor into a single package. Belonging to the power management IC family of non-isolated point-of-load (PoL) converters, such modules reduce design complexity, minimize PCB area, and improve thermal performance compared to discrete buck converter designs, which is essential for powering modern digital loads. Key features include 6A continuous output current, high efficiency, and DCS-Control topology for fast transient response and stable operation. The integrated 220nH shielded inductor (±20% tolerance in RDJ/RDM packages) provides excellent EMI performance. The module offers power-good output, enable pin, and adjustable switching frequency for flexible power sequencing and design optimization. Technically, the TPSM8286xA family uses the DCS-Control (Direct Control with Seamless transition into energy saving mode) architecture, delivering fixed-frequency operation with excellent load and line regulation. The TPSM82864A and TPSM82866A in RDJ and RDM packages are pin-to-pin and BOM-to-BOM compatible, allowing a 4A option on the same footprint. The TPSM8286xAA0HRDMR variants provide higher efficiency due to increased package height, and the RCF MagPack variant uses a 200nH inductor with enhanced EMI shielding. Typical applications include core power supplies for FPGAs, CPUs, and ASICs, optical modules, and medical and industrial equipment, where board space is at a premium and high current density is required. When designing with this module, ensure adequate input and output capacitance for stability. The integrated inductor simplifies layout, but proper grounding and thermal vias remain essential for optimal thermal performance at full 6A load.
TPSM82866C - 6A Step-Down Power Module I2C | Texas Instruments
The Texas Instruments TPSM82866C is a 6A step-down power module with an integrated inductor and I2C interface, designed for compact, high-density power delivery. It operates from a 2.4V to 5.5V input and provides an adjustable output voltage, making it suitable for a wide range of point-of-load (PoL) applications. The module is housed in a MagPack (RCF) QFN package measuring only 2.3mm x 3mm, achieving a power density of nearly 1A per 1mm2 of area. A step-down power module is a complete DC-DC converter that integrates the controller, power FETs, inductor, and compensation into a single package. This integration simplifies design, reduces external component count, and minimizes PCB footprint compared to discrete buck regulator solutions. The TPSM82866C belongs to the TPSM8286xx family, which includes 4A (TPSM82864x) and 6A (TPSM82866x) variants, all pin-to-pin and BOM-to-BOM compatible, allowing easy scalability between current ratings. Key features include a 200nH shielded inductor that enhances EMI performance, an I2C interface for dynamic voltage scaling and telemetry, and high efficiency across the load range. The module supports output voltage programming via I2C or external resistors, and includes soft-start, overcurrent protection, and thermal shutdown. The RCF MagPack package shields both the inductor and the IC, further improving EMI performance. The TPSM82866C uses a synchronous buck topology with integrated MOSFETs, achieving high efficiency at light and full loads. The I2C interface allows real-time monitoring of output voltage, current, and temperature, enabling adaptive power management. The integrated, shielded inductor reduces EMI and simplifies layout. Typical applications include FPGA, ASIC, and DSP power supplies, server and networking equipment, and industrial automation. The I2C interface is particularly useful in systems requiring dynamic voltage scaling or telemetry. When designing with this module, ensure proper input and output capacitance for stability and transient response. Configure the I2C address and output voltage settings per system requirements, and provide adequate PCB copper area for heat dissipation.
TPSM82901SISR - 1A 17V Buck Power Module | TI MicroSiP
The Texas Instruments TPSM82901SISR is a 1 A, 3 V to 17 V input synchronous buck (step-down) DC-DC converter power module with an adjustable output voltage range of 0.4 V to 5.5 V, integrated inductor, and high switching frequency of 2.5 MHz, housed in an 11-terminal MicroSiP (SIS) surface-mount package. A buck power module is a complete DC-DC point-of-load converter that integrates the power semiconductor switches, control IC, and magnetics into a single encapsulated surface-mount package. Power modules sit at the top of the power management IC hierarchy (power module > switching regulator > voltage regulator > power management IC), trading a modest cost premium for dramatically reduced design effort, smaller solution footprint, and guaranteed magnetics integration. Key features of the TPSM82901SISR include its wide 3 V to 17 V input range covering 5 V, 12 V, and buffered industrial rails, its 0.4 V to 5.5 V adjustable output capable of powering modern microcontrollers and FPGAs, its integrated inductor that eliminates magnetics selection, and its high 2.5 MHz switching frequency that enables the compact MicroSiP footprint and fast transient response. Per TI's product page, the module targets high efficiency and low quiescent current (IQ) operation, making it attractive for always-on and battery-backed systems. The device uses a synchronous buck topology with internal power MOSFETs and an integrated shielded inductor, packaged using TI's MicroSiP technology that co-packages silicon and passives in a rectangular HSON-style 11-terminal outline. The SIS package is the smallest buck power module format TI offers, enabling point-of-load conversion in space-constrained boards where a discrete inductor would not fit. According to Partstack data, the 2.5 MHz switching frequency permits small external input and output capacitors. Typical applications include point-of-load power for microcontrollers and DSPs (such as NXP S12 and Kinetis families), sensors and IoT edge nodes powered from 12 V rails, communication modules, and industrial auxiliary supplies where a compact, low-IQ step-down converter is required. The wide input range means one module design can serve 5 V USB, 12 V industrial, and 13.5 V automotive intermediate buses. Design considerations: although the inductor is integrated, input ceramic capacitance and careful PCB layout around the VIN, SW, and GND pins remain essential for EMI and stability; always follow the layout guidance in the manufacturer datasheet. This page synthesizes distributor pricing context, alternative-part analysis, and practical design notes not found in the manufacturer datasheet alone.
TS117S - 350V 1-Form-A OptoMOS Telecom Switch | IXYS
The IXYS (now part of Littelfuse) TS117S is a 350 V normally-open (1-Form-A) solid-state relay integrated with an optocoupler driver in a single 8-pin SMD (Gull-Wing) package. The device uses optically-coupled MOSFET technology to deliver 3750 Vrms of input-to-output isolation, making it suitable for telecom line-interface cards where the control logic must remain galvanically isolated from the high-voltage line side. Load voltage is rated to 350 V peak, and load current is rated to 120 mA continuous / 300 mA short-term pulse. An optocoupler (also called an opto-isolator) is a semiconductor device that transfers an electrical signal between two isolated circuits using an internal infrared LED and a photodetector. Solid-state relays (SSRs) replace mechanical relays with MOSFET outputs, providing silent switching, no contact bounce, and orders-of-magnitude longer mechanical life. The TS117S combines both functions into one IC, occupying the role of a galvanically-isolated switch inside the broader hierarchy: SSR -> semiconductor switch -> discrete power semiconductor -> power management component. Key features include 35 ohm typical on-resistance, <1 mA LED trigger current, 50 pF typical output capacitance, and surge withstand compatible with telecom ringing and on-hook/off-hook transients. The SMD-8 footprint supports automated assembly and reflow soldering, and the device carries 3750 Vrms safety isolation between input and output. The TS117S ships with tin-lead or lead-free (RoHS-compliant) terminal finish options. The TS117S architecture places an AlGaAs infrared LED on the input side that drives two back-to-back MOSFET output switches on the load side, providing AC/DC switching capability. The lack of moving parts gives unlimited operational cycles and eliminates the acoustic noise of electromechanical relays. Built-in current-limiting and thermal considerations make it robust against inductive kick and short-duration overloads typical of telephone-line transient events. Typical applications include telecom line-interface cards (SLIC hook-switch / ring-trip / test access), modem and fax line switching, PBX trunk cards, instrumentation multiplexing, and process-control I/O isolation. The compact 8-pin SMD package suits high-density line-card designs where board area is at a premium. When designing with this part, ensure the LED input current is at least 5 mA for reliable turn-on across temperature, place a 0.1 uF bypass capacitor near the LED anode pin, and verify that the peak load voltage (including ringing transients) never exceeds the 350 V rating. The maximum isolation voltage rating of 3750 Vrms must be observed for safety-compliant creepage and clearance. This page combines distributor pricing snapshots, drop-in cross-brand alternatives from web cross-reference data, and practical PCB-layout guidance - information not collated on any single manufacturer datasheet.
TS14002-C023DFNR - 2.3V 150mA LDO | Semtech
The Semtech TS14002-C023DFNR is a fixed 2.3 V positive linear voltage regulator IC with a 150 mA output current rating, packaged in an 8-DFN 2 x 2 mm package. The device belongs to Semtech's nanoSmart ultra-low-power regulator family and is intended for compact, low-power electronic systems. Verified distributor data identifies it as a single-output positive linear regulator with fixed 2.3 V operation. A low-dropout regulator, or LDO, is a linear regulator that maintains a stable output voltage while consuming less power than a switching regulator under suitable low-dropout conditions. In the power-management hierarchy, an LDO belongs to linear regulators, voltage regulators, and power-management ICs. It is commonly used to clean up a supply rail for analog, sensing, communications, embedded, and portable-electronics circuits. The principal verified characteristics are the 2.3 V fixed output, 150 mA rated output current, and 8-DFN 2 x 2 mm package. The manufacturer describes the TS14002 family as a nanoSmart ultra-low-power linear regulator. These features make the TS14002-C023DFNR relevant to designs requiring a compact, low-power rail, although the supplied data does not include the input-voltage window, dropout voltage, accuracy, noise, current consumption, thermal limits, or capacitor requirements. Because the available verified results do not expose the complete electrical limits or a manufacturer-hosted datasheet, designers should obtain the official TS14002 datasheet before finalizing a power tree. In particular, verify minimum input voltage, maximum input voltage, output tolerance, line regulation, load regulation, quiescent current, enable behavior, stability, and exposed-pad requirements. The distributor listings identify the exposed-pad 8-DFN construction, making land-pattern and thermal-pad layout verification essential. Typical application candidates include battery-powered sensors, portable instrumentation, low-power wireless modules, industrial monitoring nodes, embedded control rails, and compact consumer devices. The 150 mA rating is appropriate only when the calculated peak load remains below the manufacturer's specified operating conditions, including line, load, temperature, and package thermal limits. A valid design must confirm that the upstream supply remains above the regulator's dropout requirement at maximum load and minimum input voltage. Preserve the manufacturer-recommended input and output capacitors, connect the exposed pad according to the datasheet land pattern, and keep sensitive analog routing away from noisy switching stages. This page combines verified distributor information, lifecycle observations, sourcing links, and clearly identified data gaps for engineering review. For a replacement, do not treat a generic 2.5 V or 3.3 V LDO as interchangeable. The output voltage must remain exactly 2.3 V, and the footprint, enable arrangement, electrical limits, capacitor compatibility, and thermal behavior must match. No verified drop-in alternatives were identified in the supplied cross-reference results, so this record does not recommend unverified substitutes.
TS2937CP33 - 500mA 3.3V Ultra-LDO Fixed Regulator TO-252 | TSC
The Taiwan Semiconductor TS2937CP33 is a 500 mA ultra-low-dropout (ULDO) fixed positive linear voltage regulator delivering a fixed 3.3 V output in a TO-252 (DPAK) surface-mount package. It accepts input voltages up to 26 V and maintains regulation with typically 170 mV dropout at full 500 mA load, making it ideal for post-switching-regulator post-regulation in 5 V and 12 V bus systems. A fixed-voltage LDO is a type of linear voltage regulator that holds its output at a precise, factory-trimmed level even when the unregulated input is barely above the output. Within the power management hierarchy, this device sits under the LDO family, which in turn falls under linear regulators, voltage regulators, and finally the broader power management integrated circuit (PMIC) category. The fixed-output topology eliminates the external resistor divider required by adjustable LDOs, simplifying BOM, reducing quiescent leakage paths, and shrinking PCB footprint for cost-sensitive designs. Key features include a tight output voltage tolerance of ±2%, 500 mA continuous output current, low quiescent current consumption, internal thermal shutdown, and short-circuit current limiting. The TO-252 (DPAK) package provides a low thermal resistance path through the tab to PCB copper, allowing reliable operation at higher VIN-VO deltas than smaller SOT-23 LDOs. The ultra-low dropout performance ensures full regulation even during input transients such as cold-crank events in 12 V automotive systems or USB load steps in 5 V rails. Architecturally, the TS2937CP33 uses a monolithic bipolar process with an integrated PNP pass transistor, a bandgap reference, and error amplifier on a single die. This PNP-LDO topology delivers lower dropout than classical NPN regulators and avoids the minimum-load-current requirement common to some N-channel MOSFET-output LDOs. The result is a stable, well-behaved 3.3 V rail across the full 0-500 mA load range. Typical applications include 12 V-to-3.3 V post-regulation in industrial PLCs, USB peripheral power, battery management in 6 V/12 V lead-acid systems, and always-on standby rails for microcontrollers and memory in white goods and metering equipment. The wide input voltage range also supports 24 V industrial bus systems with adequate headroom. When designing with this device, ensure the input-to-output voltage differential does not cause excessive power dissipation beyond the DPAK's thermal capability. Adding a 10 uF minimum ESR-stable output capacitor close to the regulator improves transient response and ensures regulator stability as recommended in the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TS2940CW33 - 1A 3.3V Ultra-LDO Regulator SOT-223 | TSC
The Taiwan Semiconductor Corporation TS2940CW33 is a 1 A ultra-low-dropout (LDO) positive fixed-voltage regulator delivering 3.3 V in a SOT-223 surface-mount package. The fixed output is trimmed at the factory, eliminating the external resistor divider normally required for adjustable LDOs. Input voltage extends to 26 V with a typical dropout of 0.6 V at full load, allowing operation from loosely regulated rails such as 5 V post-switchers or battery stacks. Output current is rated at 1 A continuous when mounted on the recommended minimum copper pad area. The device is specified for -40 C to +125 C junction temperature, making it suitable for industrial-grade environments. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs sit within the broader taxonomy of linear regulators, themselves a subset of voltage regulators, all of which belong to the power management IC family of semiconductor devices. The "ultra-low-dropout" designation typically means a dropout below 0.7 V at full load, achieved with a PNP pass transistor topology rather than the older NPN Darlington arrangement. The TS2940CW33 specifically uses this monolithic PNP design, which is why it can sustain regulation with VIN only marginally above VOUT. Key features include 0.6 V typical dropout at 1 A load, 4.5 V to 26 V wide input range, internal current limiting, thermal shutdown protection, and stable operation with low-ESR ceramic output capacitors. Output voltage tolerance is typically +/-2 percent at 25 C. The PNP pass architecture trades higher quiescent current for very low dropout, an acceptable compromise in 12 V to 24 V post-regulator or battery-fed systems where headroom is precious. Internally, the TS2940CW33 uses a bandgap reference with on-chip trimming, a PNP pass element, an error amplifier, and protection blocks for current limit and thermal shutdown. Trimmed fixed output removes the need for external feedback components and improves long-term output accuracy by eliminating resistor drift contributions. The SOT-223 package provides a drain-tab that doubles as a thermal pad, lowering theta_JA when the tab is soldered to a copper pour. Typical applications include post-regulation after a switching converter where residual switching ripple must be cleaned up, battery-powered devices needing 3.3 V system rails from 4.5 V or higher sources, USB charger subsystems, point-of-load regulation in distributed power architectures, and industrial 24 V-bus systems stepped down to local 3.3 V. The fixed 3.3 V output matches common microcontroller and logic families. When designing with this part, observe that the SOT-223 thermal pad must be soldered to copper of at least 1 square inch to achieve datasheet-current capability without overheating. The output capacitor ESR must stay within the manufacturer's stability envelope; use low-ESR ceramic or tantalum parts. For systems that may operate below 4 V input, add bulk capacitance to the input because the PNP pass element can demand high inrush current during load transients. This page synthesizes distributor pricing, drop-in alternatives within the SOT-223 footprint, and practical thermal notes not found in the manufacturer datasheet alone, all validated against the TS2940 series datasheet as of 2026-10-11.
TS2940CW33RP - 1A 3.3V Ultra-Low Dropout LDO | Taiwan Semiconductor
The Taiwan Semiconductor TS2940CW33RP is a 1 A ultra-low-dropout (LDO) linear regulator with a fixed 3.3 V output voltage, packaged in a 3-pin SOT-223 (CW suffix). It accepts an input supply from 0 V to 35 V, delivers 3.2 V to 3.4 V output tolerance, and offers a typical dropout of 600 mV at full 1 A load, making it well suited to battery-powered and post-switching-regulator noise-filter applications. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable, low-ripple output voltage even when the input-to-output differential is very small - as little as a few hundred millivolts. LDOs sit beneath the broader hierarchy of linear regulators, themselves a subset of voltage regulators in the power-management IC family. Unlike switching converters, LDOs dissipate the excess input-to-output energy as heat, so they trade efficiency for exceptionally low output noise and zero switching ripple, a combination valuable for analog and RF rails. The TS2940C family features 100 uA typical quiescent current, a PNP pass architecture that allows the regulator to operate from inputs as low as ~3.9 V while still regulating 3.3 V out, and very low ground current that rises only slightly at dropout, extending battery life. The SOT-223 package with an exposed tab keeps the part compact while providing adequate thermal dissipation for continuous 1 A operation in moderate VIN/VOUT differential conditions. The architecture is a monolithic bipolar design with an internal bandgap reference, error amplifier, and PNP pass transistor. Quiescent current is well-controlled and the device tolerates a wide 0 V to 35 V input range, which simplifies protection design and allows direct connection to higher-voltage rails such as 12 V automotive or industrial buses with appropriate input filtering. Typical applications include battery-powered equipment, post-regulator noise filters after switching converters, microcontroller and logic-rail supplies, and 3.3 V point-of-load regulation in industrial and consumer systems. The fixed 3.3 V output makes it a near-direct match for 3.3 V MCUs, MCUs, Wi-Fi modules, and 3.3 V-only logic families. When designing with this part, mind the thermal budget: at 1 A load the dropout region can dissipate several hundred milliwatts or more, so a copper pour on the SOT-223 tab is recommended. Also note that the 0 V minimum input is the absolute rating - in practice a 4 V VIN minimum is needed to maintain 3.3 V regulation across temperature. This page synthesizes distributor pricing, drop-in alternatives, application notes, and design considerations not found in the manufacturer datasheet alone.
TS30011-M000QFNR - 1A 24V Sync Buck DC/DC Converter | Semtech
The Semtech TS30011-M000QFNR is a high-efficiency synchronous buck DC/DC switching regulator with fully integrated power MOSFETs, internal compensation, and 1A continuous output current capability, housed in a 16-pin VQFN exposed-pad (QFNR) package. It accepts an input voltage range of 4.5V to 24V and produces an adjustable output from 0.9V up to approximately 5V, with a fixed 1 MHz switching frequency that simplifies external filter design. The device is qualified for operation across -40C to +125C junction temperature, making it suitable for harsh automotive and industrial environments. A buck converter (also called a step-down switching regulator) is a type of switched-mode power supply (SMPS) that efficiently converts a higher DC input voltage to a lower DC output voltage by rapidly switching a power transistor and storing energy in an inductor. Compared with linear regulators (LDOs), buck converters waste far less power as heat when the input-to-output voltage difference is large, which is why they dominate point-of-load conversion in modern electronics. The buck regulator sits within the broader hierarchy: SMPS -> DC/DC converter -> step-down (buck) regulator -> power management IC -> semiconductor. Key features of the TS30011 include integrated high-side and low-side MOSFETs that eliminate the need for external switches, a Power Good (PG) open-drain output for system sequencing, internal soft-start to limit inrush current, and a comprehensive protection suite consisting of input under-voltage lockout (UVLO), cycle-by-cycle current limit, and thermal shutdown. The 1 MHz fixed switching frequency allows the use of small inductors and ceramic capacitors, enabling a total solution footprint typically under 50 mm square. The TS30011 architecture is a voltage-mode control loop with internal compensation, which removes the burden of external RC compensation networks that burden many competing parts. The exposed thermal pad on the QFN package provides a low thermal resistance path to PCB copper, supporting continuous 1A output at elevated ambient temperatures with proper board layout. Typical applications include 24V industrial sensor rails, automotive infotainment and body electronics, distributed 5V/3.3V POL converters, PoE powered devices, battery-powered portable equipment, and LED driver auxiliary rails. The wide 4.5V-24V input range particularly suits 12V/24V industrial bus systems. When designing with the TS30011, observe the minimum input-to-output headroom required for regulation (typically 1V or less at light load) and follow the datasheet inductor selection guidance to maintain stability. Place the input ceramic capacitor as close as possible to the PVIN and PGND pins to minimize switching-node ringing and EMI.
TS30011-M033QFNR - 1A Sync Buck 3.3V 1MHz QFN-16 | Semtech
The Semtech TS30011-M033QFNR is a 1 A high-efficiency synchronous buck DC/DC switching regulator with a fixed 3.3 V output, switching at 1 MHz, housed in a 16-pin VQFN (QFN) exposed-pad package. It operates from 4.5 V to 24 V input and integrates both high-side and low-side MOSFETs, internal compensation, and full fault protection. A buck (step-down) DC/DC converter is a switching power topology that reduces a higher DC rail to a lower regulated DC rail by chopping the input with a switching element and averaging energy through an LC filter. The TS30011 belongs to the synchronous buck family, meaning the rectifier diode is replaced by a second MOSFET to lower conduction loss and raise efficiency. Within the power-management hierarchy, it sits under DC-DC converters -> voltage regulators -> power management ICs -> analog semiconductors. Key features of the TS30011-M033QFNR include a fixed 3.3 V output (no external feedback resistors required), 1 A continuous load capability, 1 MHz fixed switching frequency that allows small inductors and ceramic output capacitors, and an internal soft-start that limits inrush current at power-up. The device also integrates input under-voltage lockout (UVLO), cycle-by-cycle current limit, thermal shutdown, and a Power Good (PG) open-drain output for system-level sequencing. The synchronous architecture uses peak current-mode control with internal slope compensation, providing clean loop response and simple external compensation. The exposed thermal pad on the QFN-16 package provides a low thermal-resistance path to PCB copper, enabling continuous 1 A operation across the industrial -40 °C to +125 °C junction temperature range without forced air cooling. Typical applications include 24 V industrial bus point-of-load regulation, FPGA/CPLD core and I/O rails, microcontroller peripheral supplies, and distributed power architectures in telecom and networking equipment. The fixed 3.3 V output eliminates resistor-divider design effort, while the 1 MHz switching frequency keeps the fundamental ripple well above the AM band and enables a small 1 µH-class inductor. When designing with the TS30011-M033QFNR, use a 22 µF X5R/X7R ceramic input capacitor and a 22 µF ceramic output capacitor placed within 5 mm of the IC, plus a 1 µH to 4.7 µH shielded inductor rated for at least 1.5 A saturation current. Place the exposed pad on a continuous ground copper pour of at least 1 square inch to keep junction temperature within derating limits. This page consolidates distributor pricing, parametric alternatives, and engineering design notes that go beyond the manufacturer datasheet, giving procurement and design engineers a single-source decision aid for the TS30011-M033QFNR.
TS30011-M050QFNR - 1A 5V Sync Buck DC/DC | Semtech | QFN-16
The Semtech TS30011-M050QFNR is a 1 A high-efficiency synchronous buck DC/DC switching regulator with a fixed 5 V output, housed in a 16-pin QFN exposed-pad (3x3 mm) package. It operates from a 4.5 V to 24 V input range, switches at 1 MHz, and integrates both high-side and low-side MOSFETs along with internal compensation and full fault protection including input under-voltage lockout, output soft start, cycle-by-cycle current limit, and thermal shutdown. A buck (step-down) DC/DC converter is a switch-mode power supply topology that rapidly switches an input voltage across an inductor to produce a lower, regulated output voltage. Compared with linear regulators, buck converters achieve much higher efficiency (typically >90%) at large VIN-VOUT differentials because they recycle energy through the inductor rather than dissipating it as heat. The TS30011 family (TS30011/12/13) spans 1 A/2 A/3 A current ratings, positioning it for compact, thermally-constrained distributed power architectures. Key specifications include a fixed 5 V output, 1 A continuous load current, 1 MHz switching frequency (enabling small ceramic output capacitors), and 4.5 V to 24 V input range. The fully integrated power switches eliminate the need for external MOSFETs, while internal compensation removes the external RC network required by many controllers. A Power Good (PG) open-drain output provides supervisory reporting to downstream system components for sequencing and fault handling. Architecturally, the device uses a peak-current-mode control loop that provides cycle-by-cycle current limiting and simplifies frequency compensation. Synchronous rectification (replacing the external Schottky with an internal low-side FET) reduces conduction loss and improves light-load efficiency, while the high 1 MHz switching frequency shrinks the external LC filter to a few small ceramic capacitors, keeping the total solution footprint under 50 mm^2. Typical applications include 24 V industrial bus point-of-load regulation, USB-powered 5 V rails, set-top box and home gateway supply rails, and distributed 5 V power in FPGA/CPLD-based systems. The wide 4.5 V-24 V input range supports direct connection to 12 V or 24 V industrial backplanes. When designing with this device, note that the fixed 5 V output cannot be adjusted. Designers needing 3.3 V, 2.5 V, 1.8 V, or adjustable rails should select the TS30011-M033QFNR, -M025QFNR, -M018QFNR, or -M000QFNR variants instead. The exposed pad must be soldered to a thermal copper pour to keep junction temperature within ratings at full load. This page synthesizes verified distributor pricing from DigiKey, Mouser, Arrow, LCSC and Newark, cross-references drop-in package-compatible alternatives from the TS30011/12/13 family and competing 1 A synchronous buck converters, and adds practical design notes beyond what is found in the manufacturer datasheet alone.
TS30011-MC00QFNR - 1A Sync Buck DC/DC Converter, 4.5-24V | Semtech
The Semtech TS30011-MC00QFNR is a 1A high-efficiency synchronous buck DC/DC switching regulator integrated in a 16-pin VFQFN exposed pad (QFNR) package, with an adjustable output variant from the TS30011 family. The device accepts a 4.5V to 24V input supply and operates at a fixed 1 MHz switching frequency, integrating both high-side and low-side MOSFET switches, internal compensation, and full protection (UVLO, soft-start, current limit, thermal shutdown) on-chip. A synchronous buck converter (also called synchronous step-down or synchronous switching regulator) is a DC/DC topology that uses two MOSFETs to convert a higher DC input voltage into a lower DC output voltage with high efficiency. It belongs to the hierarchy: DC/DC switching regulator -> buck converter -> switching regulator -> voltage regulator -> power management IC. The synchronous architecture replaces the conventional Schottky diode with a low-side MOSFET, dramatically reducing conduction losses at heavy loads and pushing typical efficiency above 90 percent - compared to ~70-80 percent for asynchronous buck converters. Key specifications include 1 MHz PWM switching (enabling small L/C filter components and low EMI), 1A continuous output current, integrated 130 mOhm high-side and 70 mOhm low-side MOSFETs (typical), 4.5V to 24V input range, and a Power Good (PG) open-drain output for system-level sequencing. The exposed-pad package keeps junction-to-ambient thermal resistance low for 1A applications without an external heatsink. The TS30011 uses peak current-mode control with internal slope compensation to simplify loop compensation. The 1 MHz switching frequency is intentionally placed outside the AM broadcast band to ease EMI compliance for consumer audio and industrial applications. Soft-start, input under-voltage lockout, cycle-by-cycle current limiting, and thermal shutdown are all integrated as protection functions, and the PG output flags when VOUT is within regulation for multi-rail processors. Typical applications include point-of-load (POL) converters for 12V-distributed industrial systems, USB-C powered device downstream rails, solid-state drive (SSD) and 5V auxiliary rails, FPGA/CPLD core and I/O supplies, and 24V-to-5V/3.3V intermediate bus converters in factory automation. When designing with this part, choose an external inductor in the 2.2 uH to 4.7 uH range, place the input and output ceramic bypass capacitors (typically 10 uF X7R) within 2 mm of the IC pins, and connect the exposed pad to a copper pour of at least 0.5 square inches to achieve the datasheet thermal ratings.
TS831-4IZT - 4.5V Micropower Voltage Supervisor, Active-Low Reset, TO-92 | STMicroelectronics
The STMicroelectronics TS831-4IZT is a micropower voltage supervisor IC with an active-low reset output, packaged in a 3-pin TO-92 (Z tape and reel) through-hole form factor and featuring a factory-trimmed 4.5V threshold with an open-drain output stage. Operating from a 1V to 5.5V VCC supply range and consuming only 1.5 uA typical quiescent current, the part combines a precision bandgap reference and a comparator with internal thermally-matched resistors, eliminating external components normally required for window or threshold customization. A voltage supervisor is a specialized power management IC that monitors a system supply rail and asserts a reset signal whenever the rail voltage drops below a predefined safe operating threshold. Supervisors sit within the broader hierarchy of reset and power-good circuits, voltage detectors, and watchdog timers in PMIC (Power Management IC) families. Unlike a voltage regulator that actively controls the rail, a supervisor only observes and reports - allowing an MCU or ASIC to enter a deterministic safe state when VCC sags or collapses during brownout, inrush, or power sequencing events. Key specifications of the TS831-4IZT include the 4.5V (TS831-4 series) factory threshold, 1.5 uA typical supply current, an open-drain RESET output (active-low) that requires an external pull-up resistor, and a 20 us typical comparator response time with 10 mV overdrive. The internal reference achieves 1.5% voltage accuracy across the -40C to +85C industrial temperature range, while the open-drain structure permits wired-OR reset logic across multiple rails or supervisors. Architecturally, the TS831 combines a high-stability bandgap reference with a precision comparator stage whose threshold is defined by on-chip, thermally-matched resistor dividers. This monolithic approach eliminates drift introduced by external divider components and guarantees that all TS831-4IZT units assert reset at the same VCC level. The open-drain output allows the user to pull up to any voltage up to 5.5V regardless of VCC, simplifying mixed-voltage reset signaling in designs where logic and MCU rails differ. Typical applications for the TS831-4IZT span 5V-tolerant microcontroller supervisor circuits (8051, MSP430, AVR, low-end Cortex-M0/M0+ devices), battery-powered equipment requiring ultra-low standby drain, embedded systems that need a deterministic reset during power-up and brownout, and industrial controls where a guaranteed reset signal improves safety and reliability. The micropower consumption also makes it well-suited for remote sensor nodes and energy-harvesting designs. When designing with this part, ensure the external pull-up resistor on the RESET pin is sized to meet the downstream logic's leakage and rise-time requirements without violating the part's open-drain sink current rating. A 100 kohm pull-up to VCC is typical for low-speed reset networks; faster MCU reset inputs often benefit from a 10 kohm pull-up. Place the TS831 as close as possible to the supply it monitors, and add a 100 nF decoupling capacitor adjacent to VCC for noise immunity on noisy industrial buses. This page consolidates distributor pricing, factory cross-reference alternatives, and practical design guidance not typically reproduced in the manufacturer datasheet - giving engineers a single decision-ready reference for selecting and sourcing the TS831-4IZT.
TUHS3F12 - 3W 12V 250mA PCB Mount AC-DC Converter | Cosel
The Cosel TUHS3F12 is a 3 W PCB-mount enclosed AC-DC converter module delivering a single regulated 12 V output at 250 mA, with a universal input range of 85 to 264 VAC (50/60 Hz) or 120 to 370 VDC. The module belongs to Cosel's TUHS series of compact board-mount power supplies designed for direct installation onto a printed circuit board without an external enclosure. An AC-DC converter (also called an off-line power supply module) converts mains alternating current into a low-voltage regulated direct-current output. Within the power-management hierarchy, it sits above DC-DC converters, which only convert an already-rectified DC rail; an AC-DC module handles rectification, power-factor correction, isolation, regulation, and protection in a single encapsulated package. Key features of the TUHS3F12 include built-in overcurrent and overvoltage protection circuits, a small footprint that greatly reduces board area, and design flexibility for hold-up time and expected life. Cosel's series documentation highlights low-noise technology and soft switching circuits that achieve high efficiency and low standby power across the TUHS range (3 W to 30 W). Notably, the module is not built with aluminum or tantalum electrolytic capacitors, which improves long-term reliability and extends expected service life compared with conventional designs. Technically, the TUHS3F12 is a member of the 3 W tier of the TUHS family; larger family members such as the TUHS25 employ synchronous rectification for further efficiency gains. The universal input permits direct connection to worldwide single-phase mains without jumper selection, making the module suitable for globally deployed equipment. The encapsulated through-hole construction provides resistance to dust, moisture, and vibration. Typical applications include industrial control equipment, household appliances, network and communication devices, LED lighting drivers, and instrumentation where a compact, isolated low-power auxiliary supply is required directly on the main PCB. A key design consideration is thermal derating: at 3 W output the module must be mounted with adequate airflow and spacing to keep case temperature within the datasheet limit, and output current should not exceed 250 mA continuously. Hold-up time can be extended with an external output capacitor per Cosel's application guidance. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
U2008B-MFPY - Bipolar Phase-Control IC for AC Motors | Microchip
The Microchip (formerly Atmel/TFK) U2008B-MFPY is a low-cost bipolar phase-control IC designed for AC motor speed control and soft-start applications, housed in an 8-pin SOIC package. It integrates full-wave load-current sensing, mains-compensated phase control, variable soft start, and overload protection into a single analog control loop. The device operates from a single supply rail of 14.5 V to 16.5 V and supports AC motor loads typically driven through an external triac. A phase-control IC is an analog/mixed-signal controller that delays the firing angle of a semiconductor switch (typically a triac) on each half-cycle of the AC mains, regulating the RMS voltage delivered to a load. Within the broader power-management hierarchy, the U2008B-MFPY belongs to the motor-driver and motion-controller IC family, which in turn sits under PMIC (Power Management IC) and discrete-semiconductor-driver categories. This sub-category is used universally in consumer appliances, power tools, and light-industrial motor controllers where cost-sensitive variable-speed AC motor drive is required. Key features include full-wave load-current sensing for closed-loop torque regulation, automatic mains-voltage compensation to maintain constant motor speed across 110 V to 240 V mains, switchable soft-start or load-current sensing, and built-in voltage/current synchronization to the AC line. Internal voltage and current references provide a self-contained solution that typically needs only a triac, an RC timing network, and a sense resistor externally. Operating temperature range is -10 °C to +125 °C, suiting appliance and industrial environments. Typical applications include universal-motor speed control in washing machines, vacuum cleaners, hand-held power tools, fans, and small pumps. According to the Atmel/Microchip datasheet, the IC's load-current feedback enables torque compensation, while the mains-compensation loop rejects ±20% line variation, ensuring constant motor speed regardless of supply fluctuations. The bipolar process technology gives robust transient immunity typical of mature appliance-class controllers. When designing with this device, route the triac gate drive and the AC sense lines away from the mains to avoid dv/dt-induced misfires, and use a proper snubber on the triac. Always consult the manufacturer datasheet for the recommended sense-resistor value and RC timing network, as these set the soft-start time and the firing-angle range.
UC1524AJ - 40V PWM Controller, 300kHz, 16-CDIP | Texas Instruments
The Texas Instruments UC1524AJ is an advanced regulating pulse-width-modulated (PWM) switching controller in a 16-pin ceramic CDIP (J) package, designed for high-reliability military-grade applications. It operates from a single supply up to 40 V, delivers 200 mA of peak output drive current, supports switching frequencies up to 300 kHz, and offers double-ended (push-pull) outputs with 45 percent maximum duty cycle. The UC1524AJ is the military-temperature (-55C to +125C) variant of the UC1524A family, which retained the proven UC1524/SG1524 architecture while substantially improving oscillator stability, reference accuracy, and output drive capability. What is a PWM controller? A PWM (Pulse-Width Modulation) controller is a type of switching regulator control IC that generates a variable-duty-cycle square-wave drive signal to switch a power MOSFET or bipolar transistor. PWM controllers sit hierarchically inside the broader family of voltage-mode and current-mode switching controllers, which themselves fall under the SMPS (Switched-Mode Power Supply) control category of power management ICs. PWM controllers are the heart of virtually every modern DC-DC converter, AC-DC switcher, and power inverter above a few watts. Key features of the UC1524AJ include a precision internal reference, a fully compensated on-chip error amplifier, an onboard oscillator with dead-time control, and built-in soft-start circuitry. Double-ended 200 mA totem-pole outputs can directly drive the gates of power MOSFETs or the bases of bipolar pass transistors in half-bridge, full-bridge, or push-pull topologies. Internal logic prevents simultaneous conduction of the upper and lower output transistors, eliminating shoot-through losses. The wide 8 V to 40 V supply range and -55C to +125C operating range make the part suitable for avionics, military, and ruggedized industrial environments. Typical applications include offline switch-mode power supplies (SMPS), DC-DC push-pull converters, half-bridge motor drivers, uninterruptible power supplies (UPS), and battery chargers. The 300 kHz maximum switching frequency allows smaller magnetics, reducing converter size and weight. Industrial 24 V bus systems and telecom -48 V distribution platforms commonly use this controller family for high-efficiency buck, boost, and flyback topologies. When designing with this device, allocate adequate PCB ground plane area and keep the oscillator timing capacitor and resistor close to pins 6 and 7. Output current ratings assume the ceramic CDIP package is soldered into a socket or PCB with sufficient copper to dissipate switching losses. Always observe the 40 V absolute maximum supply rating and include input bulk capacitance to absorb inrush. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a unique reference for legacy UC1524A-family designs.
UC2825DWTR - 1A, 30V High-Speed PWM Controller | Texas Instruments
The Texas Instruments UC2825DWTR is a high-speed, double-ended PWM controller delivering up to 1A peak output drive current in a 16-pin SOIC (DW) package. It supports switching frequencies up to 1 MHz and is designed for topologies including Boost, Flyback, Forward, Full-Bridge, Half-Bridge, and Push-Pull converters, with a wide 10V to 30V supply range and enhanced 9.2V/8.4V UVLO thresholds. A PWM controller (Pulse-Width Modulation controller) is a semiconductor device that regulates power converter switching by modulating the duty cycle of the driver output stage. PWM controllers belong to the hierarchy: PWM controller -> switching controller -> DC-DC controller -> power management IC -> semiconductor. Compared with simple voltage regulators, PWM controllers provide the high-side/low-side gate drive, current sensing, and protection logic needed to build discrete switching converters. Key features of the UC2825DWTR include a 1V-threshold current-limit comparator, a TTL-compatible shutdown pin, a soft-start pin that doubles as a maximum duty-cycle clamp (programmable to 80%), and an under-voltage lockout with 800 mV of hysteresis. The output stage delivers ±1.5 A peak totem-pole drive, fully latched logic prevents multiple output pulses, and an internal 5.1V reference powers the control loop. Architecturally, the UC2825 uses a bipolar process with a double-ended push-pull output stage. The high peak drive current and 30V rating allow direct gate drive of power MOSFETs or small IGBTs in high-frequency SMPS designs. The fully-latched comparator logic eliminates jitter and double-pulsing that can occur in edge-triggered designs, producing clean gate waveforms at high frequency. Typical applications include telecom and server DC-DC converters, isolated bus converters using push-pull or bridge topologies, industrial power supplies, motor drivers, and high-frequency SMPS modules. The wide input range and high peak drive current make it well suited to 48V telecom rails, industrial 24V systems, and automotive-grade variants exist as UC2825-Q1. When designing with this device, choose external R/C timing values for the oscillator to set frequency and maximum duty cycle. Use Kelvin connections to the current-sense resistor for accurate 1V-threshold current limiting, and place bypass capacitors close to VCC and the 5.1V reference pin to maintain stability. This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.