TPS628503-Q1中文资料德州仪器数据手册PDF规格书

1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Input voltage range: 2.7 V to 6 V

• Output voltage from 0.6 V to 5.5 V

• 1 feedback voltage accuracy

(full temperature range)

• TJ = –40°C to +150°C

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

devices

• Adjustable switching frequency and sync of

1.8 MHz to 4 MHz

• Forced PWM or PWM and PFM operation

• Quiescent current 17 μA (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 1-A, 2-A

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

use synchronous step-down DC/DC converters.

They are based on a peak current mode control

topology. Low resistive switches allow up to 2-A

continuous output current and 3-A peak current. 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 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 1.60-mm ×

2.10-mm SOT583 package.