XFL4015-471ME中文资料德州仪器数据手册PDF规格书

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.