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TPS65131-Q1

ACTIVE

Automotive split-rail converter with dual, positive and negative outputs (750mA typ)

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Data sheet

TPS65131-Q1

ACTIVE
Data sheet Order now

Product details

Display type LCD bipolar IC integration LCD bias Vin (min) (V) 2.7 Vin (max) (V) 5.5 Applications 7 inches or less, 7 to 13 inches Source driver voltage (min) (V) -15 Source driver voltage (max) (V) 15 Level shifter/scan driver (Ch) 0 V_POS (min) (V) 3.2 V_POS (max) (V) 15 V_NEG (min) (V) -15 V_NEG (max) (V) -2 Features Adjustable sequencing Topology Split-Rail Rating Automotive Operating temperature range (°C) -40 to 105
Display type LCD bipolar IC integration LCD bias Vin (min) (V) 2.7 Vin (max) (V) 5.5 Applications 7 inches or less, 7 to 13 inches Source driver voltage (min) (V) -15 Source driver voltage (max) (V) 15 Level shifter/scan driver (Ch) 0 V_POS (min) (V) 3.2 V_POS (max) (V) 15 V_NEG (min) (V) -15 V_NEG (max) (V) -2 Features Adjustable sequencing Topology Split-Rail Rating Automotive Operating temperature range (°C) -40 to 105
VQFN (RGE) 24 16 mm² 4 x 4
  • Qualified for automotive applications
  • AEC-Q100 test guidance with the following results:
    • Device temperature grade 2: –40°C to 105°C ambient operating temperature range
    • Electrical characteristics tested over –40°C to 125°C junction temperature range
    • Device HBM ESD classification level H1C
    • Device CDM ESD classification level C4B
  • Dual adjustable output voltages up to 15V and down to –15V
  • 2A typical switch-current limit for boost and inverter main switches
  • High conversion efficiency
    • Up to 91% at positive output rail
    • Up to 85% at negative output rail
    • Power-save mode at low load
  • Independent enable inputs for power-up and power-down Sequencing
  • Control output for external PFET to support complete supply Disconnect When Shut Down
  • 2.7V to 5.5V input-voltage range
  • Minimum 1.25MHz fixed-frequency PWM operation
  • Thermal shutdown
  • Overvoltage protection on both outputs
  • 0.2µA typical shutdown current
  • Small 4mm × 4mm QFN-24 package (RGE) with wettable flanks
  • Qualified for automotive applications
  • AEC-Q100 test guidance with the following results:
    • Device temperature grade 2: –40°C to 105°C ambient operating temperature range
    • Electrical characteristics tested over –40°C to 125°C junction temperature range
    • Device HBM ESD classification level H1C
    • Device CDM ESD classification level C4B
  • Dual adjustable output voltages up to 15V and down to –15V
  • 2A typical switch-current limit for boost and inverter main switches
  • High conversion efficiency
    • Up to 91% at positive output rail
    • Up to 85% at negative output rail
    • Power-save mode at low load
  • Independent enable inputs for power-up and power-down Sequencing
  • Control output for external PFET to support complete supply Disconnect When Shut Down
  • 2.7V to 5.5V input-voltage range
  • Minimum 1.25MHz fixed-frequency PWM operation
  • Thermal shutdown
  • Overvoltage protection on both outputs
  • 0.2µA typical shutdown current
  • Small 4mm × 4mm QFN-24 package (RGE) with wettable flanks

The TPS65131-Q1 device is dual-output dc-dc converter generating a positive output voltage up to 15V and a negative output voltage down to –15V with output currents of typically 200mA, depending on input-voltage to output-voltage ratio. With a total efficiency up to 85%, the device is ideal for portable battery-powered equipment. The input-voltage range of 2.7V to 5.5V allows, for example, 3.3V and 5V rails to power the TPS65131-Q1 device. The TPS65131-Q1 device comes in a QFN-24 package with thermal pad and wettable flanks. Requiring few and small external components, the overall solution size can be small.

The converter operates with a fixed-frequency PWM control topology and, with power-save mode enabled, uses a pulse-skipping mode at light load currents. In operation, the typical overall device quiescent current is only 500µA. In shutdown, the device draws typically 0.2µA. Independent enable pins allow power-up and power-down sequencing for both outputs. The device has an internal current limit, overvoltage protection, and a thermal shutdown for highest reliability under fault conditions.

The TPS65131-Q1 device is qualified for automotive applications, according to AEC-Q100 temperature grade 2. The electrical characteristics are tested over –40°C to 125°C device junction temperature. This, combined with lowest shutdown currents, small solution size, package with thermal pad, plus good efficiency and protection features, targets automotive and industrial applications.

The TPS65131-Q1 device is dual-output dc-dc converter generating a positive output voltage up to 15V and a negative output voltage down to –15V with output currents of typically 200mA, depending on input-voltage to output-voltage ratio. With a total efficiency up to 85%, the device is ideal for portable battery-powered equipment. The input-voltage range of 2.7V to 5.5V allows, for example, 3.3V and 5V rails to power the TPS65131-Q1 device. The TPS65131-Q1 device comes in a QFN-24 package with thermal pad and wettable flanks. Requiring few and small external components, the overall solution size can be small.

The converter operates with a fixed-frequency PWM control topology and, with power-save mode enabled, uses a pulse-skipping mode at light load currents. In operation, the typical overall device quiescent current is only 500µA. In shutdown, the device draws typically 0.2µA. Independent enable pins allow power-up and power-down sequencing for both outputs. The device has an internal current limit, overvoltage protection, and a thermal shutdown for highest reliability under fault conditions.

The TPS65131-Q1 device is qualified for automotive applications, according to AEC-Q100 temperature grade 2. The electrical characteristics are tested over –40°C to 125°C device junction temperature. This, combined with lowest shutdown currents, small solution size, package with thermal pad, plus good efficiency and protection features, targets automotive and industrial applications.
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Technical documentation

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Type Title Date
* Data sheet TPS65131-Q1 Positive- and Negative-Output DC-DC Converter datasheet (Rev. F) PDF | HTML 25 Aug 2024
Application note 스트컨버터의 전력계 기본 계산 (Rev. D) PDF | HTML 21 Nov 2022
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 Oct 2022
Application note Understanding Undervoltage Lockout in Power Devices (Rev. A) 19 Sep 2018
White paper Powering automotive displays to create interactive driving experiences 21 Dec 2017
Application note Basic calculation of an inverting buck-boost power stage (Rev. A) 28 Aug 2017
Technical article Split-rail converters reduce BOM size and cost in new automotive displays PDF | HTML 01 Jul 2015
EVM User's guide TPS65131EVM User's Guide (Rev. C) 23 Nov 2010
Application note Minimizing Ringing at the Switch Node of a Boost Converter 15 Sep 2006

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Reference designs

PMP9780 — Reference Design: Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps

This reference design details a display power circuit which generates a bipolar voltage rail for source drivers and additional supplies for gate drivers. Charge pumps are used to generate the voltage supply for gate drivers, which makes this design easy to implement. By using only one dc-dc (...)
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