TPS65131-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• 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

2 Applications

• Small-to-medium size OLED displays

• (TFT) LCD, CCD bias supply

3 Description

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.