1 Features

• AEC-Q100 qualified for automotive applications

– Device temperature grade 1:

–40°C to +125°C TA

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Input voltage range: 2.75V to 6V

• Family of 1A, 2A, 3A, and 4A

• Quiescent current 15μA typical

• Output voltage from 0.6V to 5.5V

• Output voltage accuracy ±1% (PWM operation)

• Adjustable soft start

• Forced PWM or PWM and PFM operation

• Adjustable switching frequency of

1.8MHz to 4MHz

• Precise ENABLE input allows

– User-defined undervoltage lockout

– Exact sequencing

• 100% duty cycle mode

• Active output discharge

• Spread spectrum clocking - optional

• Power-good output with window comparator

• Package with wettable flanks

2 Applications

• Infotainment head unit

• Hybrid and reconfigurable cluster

• Telematics control unit

• Surround view ECU, ADAS sensor fusion

• External amplifier

3 Description

The TPS6281x-Q1 is family of pin-to-pin 1A, 2A, 3A,

and 4A synchronous automotive step-down DC/DC

converters. All devices offer high efficiency and ease

of use. The TPS6281x-Q1 family is based on a

peak current mode control topology. The TPS6281x-

Q1 is designed for automotive applications such as

infotainment and advanced driver assistance systems.

Low resistive switches allow up to 4A continuous

output current at high ambient temperature. The

switching frequency is externally adjustable from

1.8MHz to 4MHz and can also be synchronized to

an external clock in the same frequency range. In

PWM/PFM mode, the TPS6281x-Q1 automatically

enter power save mode at light loads to maintain

high efficiency across the whole load range. The

TPS6281x-Q1 provide 1% output voltage accuracy in

PWM mode which helps design a power supply with

high output voltage accuracy. The SS/TR pin allows

setting the start-up time or forming tracking of the

output voltage to an external source. This feature

allows external sequencing of different supply rails

and limiting the inrush current during start-up.

The TPS6281x-Q1 is available in a 3mm × 2mm

VQFN package with wettable flanks.