Product details

Vin (Min) (V) 2.95 Vin (Max) (V) 5.5 Vout (Min) (V) 0.8 Vout (Max) (V) 5 Iout (Max) (A) 3 Iq (Typ) (uA) 3500 Switching frequency (Min) (kHz) 1500 Switching frequency (Max) (kHz) 1500 Features Adjustable Current Limit, 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) 3 Iq (Typ) (uA) 3500 Switching frequency (Min) (kHz) 1500 Switching frequency (Max) (kHz) 1500 Features Adjustable Current Limit, 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
  • LM20123Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 96% Efficiency with 1.5 MHz Switching Frequency
  • 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-Pins) Exposed Pad Package

All trademarks are the property of their respective owners.

  • LM20123Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow
  • Input Voltage Range 2.95V to 5.5V
  • Accurate Current Limit Minimizes Inductor Size
  • 96% Efficiency with 1.5 MHz Switching Frequency
  • 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-Pins) Exposed Pad Package

All trademarks are the property of their respective owners.

The LM20123 is a full featured 1.5 MHz synchronous buck regulator capable of delivering up to 3A 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 LM20123 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 LM20123 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 LM20123 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 LM20123 is a full featured 1.5 MHz synchronous buck regulator capable of delivering up to 3A 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 LM20123 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 LM20123 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 LM20123 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.

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet LM20123/LM20123Q 3A, 1.5MHz PowerWise ® Synchronous Buck Regulator datasheet (Rev. E) 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
User guide AN-1686 LM20123 Evaluation Board (Rev. B) 03 May 2013
Application note AN-1747 3A LM20k Reference Designs (Rev. A) 03 May 2013
Application note AN-2077 LM20k POL Module (Rev. A) 03 May 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LM20123 PSpice Average Model

SNVM427.ZIP (57 KB) - PSpice Model
Simulation model

LM20123 PSpice Transient Model

SNVM428.ZIP (189 KB) - PSpice Model
Simulation model

LM20123 Unencrypted PSpice Average Model

SNVM799.ZIP (1 KB) - PSpice Model
Simulation model

LM20123 Unencrypted PSpice Transient Model

SNVM800.ZIP (2 KB) - PSpice Model
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

LM20123DESIGN-CALC — LM20123 Design Spreadsheet

Package Pins Download
HTSSOP (PWP) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos