Product details

Vin (Min) (V) 2.95 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 5 Iout (Max) (A) 4 Iq (Typ) (uA) 3500 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 1500 Features Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 2.95 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 5 Iout (Max) (A) 4 Iq (Typ) (uA) 3500 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 1500 Features Enable, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Available in AEC-Q100 Temperature Grade 1
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Adjustable Switching Frequency (500 kHz - 1.5 MHz)
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

  • Available in AEC-Q100 Temperature Grade 1
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 97% Peak Efficiency
  • Adjustable Switching Frequency (500 kHz - 1.5 MHz)
  • 32 mΩ Integrated FET Switches
  • Starts up into Pre-Biased Loads
  • Output Voltage Tracking
  • Peak Current Mode Control
  • Adjustable Output Voltage Down to 0.8V
  • Adjustable Soft-Start with External Capacitor
  • Precision Enable Pin with Hysteresis
  • Integrated OVP, UVLO, Power Good and Thermal Shutdown
  • HTSSOP 16-Pin Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20144 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 4A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20144 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20144 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.

The LM20144 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

The LM20144 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 4A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.

The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.

The LM20144 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20144 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.

The frequency of this device can be adjusted from 500 kHz to 1.5 MHz by connecting an external resistor from the RT pin to ground.

The LM20144 is offered in a 16-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

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Technical documentation

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Type Title Date
* Data sheet PowerWise Adj Freq Synch Buck Reg datasheet (Rev. G) 27 Mar 2013
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1692 LM20144 Evaluation Board (Rev. B) 05 May 2013
Application note AN-1751 4A LM20k Reference Designs (Rev. A) 03 May 2013
Application note AN-2077 LM20k POL Module (Rev. A) 03 May 2013

Design & development

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Evaluation board

LM20144EVAL — 4A, PowerWise® Adjustable Frequency Synchronous Buck Regulator Evaluation Module

The LM20144 is a full featured buck switching regulator capable of driving up to 4A of load current. The switching frequency of the LM20144 can be varied from 500kHz to 1.5Mhz with an external resistor allowing the size of the power stage components to be reduced while still providing efficient (...)

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Calculation tool

LM20144DESIGN-CALC — LM20144 Design Spreadsheet

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HTSSOP (PWP) 16 View options

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