MAX14527 查看數據表（PDF） - Maxim Integrated

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MAX14527

Adjustable Overvoltage Protector with High Accuracy

Maxim Integrated 

19-4357; Rev 0; 10/08

Adjustable Overvoltage Protector

with High Accuracy

General Description

The MAX14527/MAX14528 overvoltage protection

devices feature a low 100mΩ (typ) RON internal FET

and protect low-voltage systems against voltage faults

up to +28V. When the input voltage exceeds the over-

voltage threshold, the internal FET is turned off to pre-

vent damage to the protected components.

The overvoltage protection threshold can be adjusted

with optional external resistors to any voltage between

4V and 8V. With the OVLO input set below the external

OVLO select voltage, the MAX14527/MAX14528 auto-

matically choose the internal ±2.5% accurate trip

thresholds. The internal overvoltage thresholds (OVLO)

are preset to 5.75V typical (MAX14527) or 6.76V typical

(MAX14528). The MAX14527/MAX14528 are also

protected against overcurrent events with an internal

thermal shutdown.

The MAX14527/MAX14528 are offered in a small, 8-pin

TDFN-EP package and operate over the -40°C to

+85°C extended temperature range.

Features

♦ Input Voltage Protection Up to +28V

♦ Preset Internal ±2.5% Accurate OVLO Thresholds

5.75V (MAX14527)

6.76V (MAX14528)

♦ Adjustable Overvoltage Protection Trip Level

♦ Integrated 100mΩ (typ) n-Channel MOSFET

Switch

♦ Soft-Start to Minimize In-Rush Current

♦ Automatic Overvoltage Protection Trip-Level

Selection

♦ Internal 15ms Startup Delay

♦ Thermal Shutdown Protection

♦ 8-Pin TDFN (2mm x 2mm) Package

♦ -40°C to +85°C Operating Temperature Range

Applications

Cell Phones

Media Players

PDAs and Palmtop Devices

Pin Configuration appears at end of data sheet.

Ordering Information

PART

PIN-PACKAGE

TOP

MARK

OVLO

(V)

MAX14527ETA+T 8 TDFN-EP*

MAX14528ETA+T 8 TDFN-EP*

ACR

5.75

ACS

6.76

Note: Devices are specified over the -40°C to +85°C tempera-

ture range.

+Denotes a lead-free/RoHS-compliant package.

T = Tape and reel.

*EP = Exposed pad.

Typical Application Circuit

VBUS

USB

CONNECTOR

1µF

R1

*

R2

IN

OUT

IN

OUT

MAX14527

MAX14528

OVLO

GND

CHARGER

INPUT

PMIC

*R1 AND R2 ARE REQUIRED ONLY FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.

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