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TPS62903

ACTIVE

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

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Data sheet

TPS62903

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 17 Vin (min) (V) 3 Vout (max) (V) 5.5 Vout (min) (V) 0.4 Features Enable, Forced PWM, Light-load efficiency, Output discharge, Power good, Soft-start adjustable, Synchronous rectification, Tracking, UVLO adjustable Control mode DCS-Control Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 3 Vin (max) (V) 17 Vin (min) (V) 3 Vout (max) (V) 5.5 Vout (min) (V) 0.4 Features Enable, Forced PWM, Light-load efficiency, Output discharge, Power good, Soft-start adjustable, Synchronous rectification, Tracking, UVLO adjustable Control mode DCS-Control Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 100
VQFN-HR (RPJ) 9 3 mm² (2 mm × 1.5 mm)
  • 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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* 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) PDF | HTML Mar 18, 2021
Application brief Solving Power Design Challenges in Enterprise SSD Applications PDF | HTML Sep 23, 2024
Application note Using the TPS6290x in an Inverting Buck – Boost Topology PDF | HTML Jul 12, 2022
Application note How to Best Use TPS62903 for a Given Application Requirement PDF | HTML Aug 13, 2021
Application note Comparison of TPS6290x vs. TPS621x0 PDF | HTML Jul 23, 2021
Application brief Multi-Function Pins for Easy Designing PDF | HTML Jul 7, 2021
Technical article Which pinout is best? How individual, multifunctional and trimmed pinouts help add PDF | HTML Jun 28, 2021
Certificate TPS62903EVM-069 EU RoHS Declaration of Conformity (DoC) Dec 15, 2020

Design & development

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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 (...)
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Simulation model

TPS62903 PSpice Transient Model

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

TPS62903 SIMPLIS Transient and Average Model

SLVMDP3.ZIP (945 KB) - SIMPLIS model
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Reference design

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 (...)
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Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RPJ) 9 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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