TPS6281x-Q1 2.75-V to 6-V Adjustable-Frequency Step-Down Converter

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: 2.75 V to 6 V

• Family of 1 A, 2 A, 3 A and 4 A

• Quiescent current 15-µA typical

• Output voltage from 0.6 V to 5.5 V

• Output voltage accuracy ±1% (PWM operation)

• Adjustable soft start

• Forced PWM or PWM and PFM operation

• Adjustable switching frequency of

1.8 MHz to 4 MHz

• 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 1-A, 2-

A, 3-A, and 4-A synchronous 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 4-A continuous

output current at high ambient temperature. The

switching frequency is externally adjustable from 1.8

MHz to 4 MHz 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 3-mm × 2-mm

VQFN package with wettable flanks.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

TPS62810-Q1

RWY (VQFN, 9)

3.00 mm × 2.00 mm

TPS62811-Q1

TPS62812-Q1

TPS62813-Q1

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

L

0.47

H

m

MODE/SYNC

SW

FB

VIN

V

IN

2.75 V -

V

6

C

IN

22 mF

C

OUT

2 x 22

F

m

+ 10

F

m

TPS62810-Q1

EN

R

1

V

OUT

R

2

GND

PG

SS/TR

COMP/FSET

C

SS

R

3

C

FF

Simplified Schematic

Output Current (A)

50

55

60

65

70

75

80

85

90

95

100

100P

1m

10m

100m

1

4

D002

VIN = 4.0 V

VIN = 5.0 V

VIN = 6.0 V

Efficiency vs Output Current; VOUT = 3.3 V; PWM/

PFM; fS = 2.25 MHz

TPS62810-Q1, TPS62811-Q1, TPS62812-Q1, TPS62813-Q1

SLVSDU1J – AUGUST 2018 – REVISED MARCH 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.