TPSM8281X中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

1 Features

? Adjustable and synchronizable switching

frequency of 1.8MHz to 4MHz

? Spread spectrum clocking (optional)

? Selectable forced PWM or PFM/PWM operation

? Output voltage accuracy ±1% (PWM operation)

? Input voltage range: 2.7V to 6V

? Output voltage range: 0.6V to 5.5V

? Adjustable soft-start or tracking

? Power-good output with window comparator

? Precise ENABLE input allows

– User-defined undervoltage lockout

– Exact sequencing

? Optimized for low EMI requirements

– No bond wire package

– MagPack technology shields inductor and IC

– Simplified layout through optimized pinout

? 100% duty cycle

? Output discharge

? 18μA typical quiescent current

? –40°C to 125°C operating temperature range

? Max package height: 1.6mm (SIE) / 2.0mm (VCA)

? Excellent thermal performance

? Pin-to-pin compatible with:

– SIE: TPSM82813 (3A) and TPSM82810 (4A)

– VCA (MagPack): TPSM82811 (1A),

TPSM82812 (2A), TPSM82813 (3A)

2 Applications

? Optical modules, data center interconnect

? Test & measurement

? Patient monitoring and diagnostics

? Wireless infrastructure

? Aerospace and defense

3 Description

TPSM8281x are a family of pin-to-pin, 1A, 2A, 3A,

4A, and 6A compatible high efficiency and easy to

use synchronous step-down DC/DC power modules

with integrated inductors. The devices are based on

a fixed-frequency peak current-mode control topology.

The devices are used in telecommunication, test and

measurement, and medical applications with high

power density and ease of use requirements. Low

resistance switches allow up to 6A continuous output

current at high ambient temperatures. 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 power save

mode, the TPSM8281x automatically enters PFM at

light loads to maintain high efficiency across the

whole load range. The TPSM8281x provides a 1%

output voltage accuracy in PWM mode which helps

design a power supply with high output voltage

accuracy. The SS/TR pin sets the start-up time or

tracks the output voltage to an external source. This

action allows external sequencing of different supply

rails and limits the inrush current during start-up.