TPS628501_V03中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? Input voltage range: 2.7V to 6V

? Output voltage from 0.6V to 5.5V

? 1 feedback voltage accuracy

(full temperature range)

? TJ = –40°C to +150°C

? Family of 1A, 2A (continuous), and 3A (peak)

devices

? Adjustable switching frequency and sync of

1.8MHz to 4MHz

? Forced PWM or PWM and PFM operation

? Quiescent current 17μA (typical)

? Precise ENABLE input allows:

– User-defined undervoltage lockout

– Exact sequencing

? 100 duty cycle mode

? Active output discharge

? Power-good output with window comparator

? For device options with adjustable soft start, see

the TPS628511

2 Applications

? Motor drives

? Factory automation and control

? Building automation

? Test and measurement

? General purpose POL

3 Description

The TPS62850x is a family of pin-to-pin 1A, 2A

(continuous), and 3A (peak) high efficiency, easyto-

use synchronous step-down DC/DC converters.

The devices are based on a peak current mode

control topology. Low resistive switches allow up to

2A continuous output current and 3A peak current.

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 and PFM mode, the TPS62850x automatically

enters power save mode at light loads to maintain

high efficiency across the whole load range. The

TPS62850x provides a 1 output voltage accuracy

in PWM mode, which helps design a power supply

with high output voltage accuracy, fulfilling tight supply

voltage requirements of digital processors and FPGA.

The TPS62850x is available in an 8-pin 1.60mm ×

2.10mm SOT583 package.