XEL3515-561ME中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

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.