3-V to 17-V, 1-A, high-efficiency and low IQ buck converter 1.5-mm × 2-mm QFN package


Product details


Vin (Min) (V) 3 Vin (Max) (V) 17 Vout (Min) (V) 0.4 Vout (Max) (V) 5.5 Iout (Max) (A) 1 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 1000 Switching frequency (Max) (kHz) 2500 Features Adjustable Current Limit, Enable, Forced PWM, Light Load Efficiency, Output Discharge, Over Current Protection, Power Good, Soft Start Fixed, Synchronous Rectification, UVLO Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)


  • High efficiency for wide duty cycle and load range
    • IQ: 4-µA typical
    • Selectable switching frequency of 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 1-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 TPS62901 using the WEBENCH Power Designer
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The TPS62901 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 TPS62901 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/S-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 TPS62901, 3-V to 17-V, High Efficiency and Low IQ Buck Converter in 1.5-mm × 2-mm QFN Package datasheet Mar. 09, 2021
Application note How to Best Use TPS62903 for a Given Application Requirement Aug. 13, 2021
Application note Comparison of TPS6290x vs. TPS621x0 Jul. 23, 2021
Application note Multi-Function Pins for Easy Designing Jul. 07, 2021
User guide TPS6290x Step-Down Converter Evaluation Module User's Guide (Rev. A) May 07, 2021
Certificate TPS62901EVM-069 EU RoHS Declaration of Conformity (DoC) Dec. 15, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
The TPS62901EVM-069 (BSR069-001) evaluation module (EVM) facilitates the evaluation of the TPS62901 1-A buck converter in small 1.5-mm by 2-mm QFN package. The EVM outputs a 3.3-V output voltage from input voltages up to 17 V. The TPS62901 is a high efficiency, low IQ buck converter for use in a (...)
  • 4 µA IQ
  • 1.5-mm x 2-mm QFN package
  • 17-V input voltage range
  • 3.3-V output voltage
  • 1-A output current

Design tools & simulation

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PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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