Product details

Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.4 Vout (Max) (V) 5.5 Iout (Max) (A) 3 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 2500 Features Enable, Forced PWM, Light Load Efficiency, Output Discharge, Power Good, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.4 Vout (Max) (V) 5.5 Iout (Max) (A) 3 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 2500 Features Enable, Forced PWM, Light Load Efficiency, Output Discharge, Power Good, Soft Start Adjustable, Synchronous Rectification, Tracking, UVLO Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1
  • High efficiency for wide duty cycle and load range
    • IQ: 4-µA typical
    • Selectable switching frequency: 2.5 MHz and 1.0 MHz
    • RDS(ON): 62-mΩ high side, 22-mΩ low side
    • Automatic efficiency enhancement (AEE)
  • Small 1.5-mm × 2.0-mm VQFN package with 0.5-mm pitch
  • Up to 3-A continuous output current
  • ±0.9% feedback voltage accuracy across temp (-40°C to 150°C)
  • Configurable ouput voltage options:
    • VFB external divider: 0.6 V to 5.5 V
    • VSET internal divider: 16 options between 0.4 V and 5.5 V
  • DCS-Control™ topology with 100% mode
  • Highly flexible and easy to use
    • Optimized pinout for single-layer routing
    • Precise enable input
    • Forced PWM or auto power save mode
    • Power good output
    • Selectable active output discharge
    • Adjustable soft start and tracking
  • No external bootstrap capacitor required
  • Create a custom design using the TPS62903 using the WEBENCH Power Designer
  • High efficiency for wide duty cycle and load range
    • IQ: 4-µA typical
    • Selectable switching frequency: 2.5 MHz and 1.0 MHz
    • RDS(ON): 62-mΩ high side, 22-mΩ low side
    • Automatic efficiency enhancement (AEE)
  • Small 1.5-mm × 2.0-mm VQFN package with 0.5-mm pitch
  • Up to 3-A continuous output current
  • ±0.9% feedback voltage accuracy across temp (-40°C to 150°C)
  • Configurable ouput voltage options:
    • VFB external divider: 0.6 V to 5.5 V
    • VSET internal divider: 16 options between 0.4 V and 5.5 V
  • DCS-Control™ topology with 100% mode
  • Highly flexible and easy to use
    • Optimized pinout for single-layer routing
    • Precise enable input
    • Forced PWM or auto power save mode
    • Power good output
    • Selectable active output discharge
    • Adjustable soft start and tracking
  • No external bootstrap capacitor required
  • Create a custom design using the TPS62903 using the WEBENCH Power Designer

The TPS62903 is a highly-efficient, small, and flexible synchronous step-down DC-DC converter that is easy to use. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high VOUT accuracy of ± 1% with the DCS-Control topology. The wide input voltage range of 3 V to 17 V supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails.

The TPS62903 can automatically enter power save mode (if auto PFM/PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 µA. AEE, if enabled, provides high efficiency across VIN, VOUT, and load current. The device includes a MODE/Smart-CONF input to set the internal/external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation.

The device is available in small 9-pin VQFN package measuring 1.50 mm × 2.00 mm with 0.5-mm pitch.

The TPS62903 is a highly-efficient, small, and flexible synchronous step-down DC-DC converter that is easy to use. A selectable switching frequency of 2.5 MHz or 1.0 MHz allows the use of small inductors and provides fast transient response. The device supports high VOUT accuracy of ± 1% with the DCS-Control topology. The wide input voltage range of 3 V to 17 V supports a variety of nominal inputs, like 12-V supply rails, single-cell or multi-cell Li-Ion, and 5-V or 3.3-V rails.

The TPS62903 can automatically enter power save mode (if auto PFM/PWM is selected) at light loads to maintain high efficiency. Additionally, to provide high efficiency at very small loads, the device has a low typical quiescent current of 4 µA. AEE, if enabled, provides high efficiency across VIN, VOUT, and load current. The device includes a MODE/Smart-CONF input to set the internal/external divider, switching frequency, output voltage discharge, and automatic power save mode or forced PWM operation.

The device is available in small 9-pin VQFN package measuring 1.50 mm × 2.00 mm with 0.5-mm pitch.

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Technical documentation

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Type Title Date
* Data sheet TPS62903, 3-V to 17-V, High Efficiency and Low IQ Buck Converter in 1.5-mm × 2-mm QFN Package datasheet (Rev. A) 18 Mar 2021
Application note How to Best Use TPS62903 for a Given Application Requirement 13 Aug 2021
Application note Comparison of TPS6290x vs. TPS621x0 23 Jul 2021
Application note Multi-Function Pins for Easy Designing 07 Jul 2021
Technical article Which pinout is best? How individual, multifunctional and trimmed pinouts help address design challenges 28 Jun 2021
EVM User's guide TPS6290x Step-Down Converter Evaluation Module User's Guide (Rev. A) 07 May 2021
Certificate TPS62903EVM-069 EU RoHS Declaration of Conformity (DoC) 15 Dec 2020
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

Design & development

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

Evaluation board

TPS62903EVM-069 — 17-VIN, 3-A, low IQ buck converter in 1.5-mm x 2-mm QFN package evaluation module

The TPS62903EVM-069 (BSR069-003) evaluation module (EVM) facilitates the evaluation of the TPS62903 3-A buck converter in small 1.5-mm by 2-mm QFN package. The EVM outputs a 1.2-V output voltage from input voltages between 3 V and 17 V. The TPS62903 is a high-efficiency, low IQ buck converter for (...)
Simulation model

TPS62903 PSpice Transient Model

SLVMDN8.ZIP (290 KB) - PSpice Model
Simulation model

TPS62903 SIMPLIS Transient and Average Model

SLVMDP3.ZIP (945 KB) - SIMPLIS 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 (...)
Gerber file

BSR069A Gerbers

SNVC242.ZIP (394 KB)
Reference designs

TIDA-050052 — High power density buck DC/DC converter reference design

The TIDA-050052 reference design is a 3-V to 17-V VIN voltage buck converter reference design using the TPS62903 for applications that have a very limited design space. The reference design steps down the input voltage to 1.2-V VOUT and is capable of delivering up to 3-A of load with (...)
Package Pins Download
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