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TPS62903-Q1

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Automotive, 3-V to 18-V, 3-A, low-IQ, synchronous buck converter with +165°C TJ

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Data sheet

TPS62903-Q1

PREVIEW
Data sheet Order now

Product details

Vin (min) (V) 3 Vin (max) (V) 18 Vout (min) (V) 0.4 Vout (max) (V) 5.5 Iout (max) (A) 3 Iq (typ) (mA) 0.004 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, Wettable flanks package Operating temperature range (°C) -40 to 165 Rating Automotive TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode DCS-Control Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 3 Vin (max) (V) 18 Vout (min) (V) 0.4 Vout (max) (V) 5.5 Iout (max) (A) 3 Iq (typ) (mA) 0.004 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, Wettable flanks package Operating temperature range (°C) -40 to 165 Rating Automotive TI functional safety category Functional Safety-Capable Regulated outputs (#) 1 Control mode DCS-Control Duty cycle (max) (%) 100 Type Converter
VQFN-HR (RYT) 9 4.4 mm² 2.2 x 2
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Level 2 device HBM ESD classification
    • Level C4B CDM ESD classification
  • Functional Safety-Capable
  • Extended TJ range: up to 165°C
  • High efficiency DCS-Control topology
    • RDS(ON): 62-mΩ high side, 22-mΩ low side
    • Seamless PWM/PFM transition
    • Internal compensation
  • 4-µA low IQ (typical)
  • Up to 3-A continuous output current
  • ±1% feedback voltage accuracy across temp
  • Configurable output voltage options:
    • 0.6-V to 5.5-V VFB external divider
    • VSET internal divider
      • 16 options between 0.4 V and 5.5 V
  • Flexibility through the MODE/S-CONF pin
    • 2.5-MHz or 1.0-MHz switching frequency
    • Forced PWM or auto PFM (power save mode) with dynamic mode change option
    • Output discharge on and off
  • No external bootstrap capacitor required
  • Overcurrent and overtemperature protection
  • 100% duty cycle mode
  • Precise enable input
  • Adjustable soft start and tracking
  • Power-good output
  • Optimized pinout for single-layer routing
  • Wettable 2.2-mm × 2.0-mm VQFN package with 0.5-mm pitch
  • Create a custom design with the TPS62903-Q1 using the WEBENCH Power Designer
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Level 2 device HBM ESD classification
    • Level C4B CDM ESD classification
  • Functional Safety-Capable
  • Extended TJ range: up to 165°C
  • High efficiency DCS-Control topology
    • RDS(ON): 62-mΩ high side, 22-mΩ low side
    • Seamless PWM/PFM transition
    • Internal compensation
  • 4-µA low IQ (typical)
  • Up to 3-A continuous output current
  • ±1% feedback voltage accuracy across temp
  • Configurable output voltage options:
    • 0.6-V to 5.5-V VFB external divider
    • VSET internal divider
      • 16 options between 0.4 V and 5.5 V
  • Flexibility through the MODE/S-CONF pin
    • 2.5-MHz or 1.0-MHz switching frequency
    • Forced PWM or auto PFM (power save mode) with dynamic mode change option
    • Output discharge on and off
  • No external bootstrap capacitor required
  • Overcurrent and overtemperature protection
  • 100% duty cycle mode
  • Precise enable input
  • Adjustable soft start and tracking
  • Power-good output
  • Optimized pinout for single-layer routing
  • Wettable 2.2-mm × 2.0-mm VQFN package with 0.5-mm pitch
  • Create a custom design with the TPS62903-Q1 using the WEBENCH Power Designer

The TPS62903-Q1 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 3-V to 18-V input voltage range 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-Q1 can automatically enter power save mode (if auto PFM or 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 and 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 2.20 mm × 2.00 mm with 0.5-mm pitch with wettable flank.

The TPS62903-Q1 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 3-V to 18-V input voltage range 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-Q1 can automatically enter power save mode (if auto PFM or 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 and 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 2.20 mm × 2.00 mm with 0.5-mm pitch with wettable flank.
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Technical documentation

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Type Title Date
* Data sheet TPS62903-Q1 3-V to 18-V, 3-A, Automotive Low IQ Buck Converter with +165°C TJ datasheet PDF | HTML 06 May 2022
Application note Comparison of TPS629xx-Q1 vs. TPS621x0A-Q1 PDF | HTML 13 Dec 2022
Functional safety information TPS629xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 06 May 2022
Certificate TPS62903-Q1EVM EU RoHS Declaration of Conformity (DoC) 04 May 2022
User guide TPS6290x-Q1 Step-Down Converter Evaluation Module User's Guide PDF | HTML 02 May 2022
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

Design & development

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Evaluation board

TPS62903-Q1EVM — TPS62903 evaluation module for 3-V to 17-V, 3-A, low-IQ, synchronous buck converter

The TPS6290x-Q1 (BSR196) evaluation module (EVM) facilitates the evaluation of the TPS6290x-Q1 1-A, 2-A and 3-A pin-to-pin compatible buck converters in small 2.2-mm by 2-mm VQFN packages with wettable flank. The BSR196-003 uses the 3-A TPS62903-Q1 to output a 1.2-V output voltage from input (...)
User guide: PDF | HTML
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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 (...)
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