1 Features

• Qualified for automotive applications

• AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C

ambient operating temperature

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• 2-V to 36-V input voltage range for VOUT = 5 V

• 5-V or 12-V fixed output voltage (TPS55165-Q1)

• Adjustable output voltage options from 5.7 V to

9 V (TPS55160-Q1 and TPS55162-Q1)

• Up to 85% efficiency

• 1-A output current for VOUT = 5 V and VIN ≥ 5.3 V

• 0.8-A output current for VOUT = 5 V and

VIN ≥ 3.8 V

• 0.4-A output current for VOUT = 5 V and

VIN ≥ 2.3 V

• Automatic transition between step-down and stepup

mode

• Low-power mode for improved efficiency at light

load conditions (TPS55160-Q1/TPS55165-Q1)

• Device quiescent current less than 15 μA in lowpower

mode (TPS55160-Q1/TPS55165-Q1)

• Device shutdown current less than 3 μA

• Forced fixed-frequency operation at 2 MHz

• Selectable spread spectrum (TPS55160-Q1 and

TPS55165-Q1)

• Wake-up through IGN with power-latch function

• Smart power-good output with configurable delay

time

• Overtemperature protection and output

overvoltage protection

• Available in easy-to-use 20-Pin HTSSOP

PowerPAD™ package

2 Applications

• Start-stop sensitive automotive power applications

– Infotainment and cluster

– Body electronics and gateway modules

• Industrial applications with fluctuating input voltage

– Solar-to-battery charging

– Li-ion battery packs

3 Description

The TPS5516x-Q1 family of devices is a highvoltage

synchronous buck-boost DC-DC converter.

The device provides a stable power-supply output

from a wide varying input-power supply such as

an automotive car battery. The buck-boost overlap

control ensures automatic transition between stepdown

and step-up mode with optimal efficiency.

The TPS55165-Q1 output voltage can be set to a

fixed level of 5 V or 12 V. The TPS55160-Q1 and

TPS55162-Q1 devices have a configurable output

voltage ranging from 5.7 V to 9 V that is set by an

external resistive divider.

Output currents can be as high as 1 A for a

normal car battery voltage, and can be maintained

at 0.4 A for lower input voltages, such as those

for common battery-cranking profiles. The buck-boost

converter is based on a fixed-frequency, pulse-widthmodulation

(PWM) control circuit using synchronous

rectification to obtain maximum efficiency. The

switching frequency is set to 2 MHz (typical) which

allows for the usage of a small inductor that uses less

board space.