MAX893

更新时间： 2024-11-25 22:12:27

品牌	Logo	应用领域
美信 - MAXIM		开关
页数	文件大小	规格书
8页	116K
描述
1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown

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MAX893 数据手册

19-1450; Rev 0; 7/99

1.2A, Current-Limited, High-Side

P-Channel Switch with Thermal Shutdown

MAX893L

General Description

____________________________Features

The MAX893L smart, low-voltage, P-channel, MOSFET

power switch is intended for high-side load-switching

applications. This switch operates with inputs from

+2.7V to +5.5V, making it ideal for both +3V and +5V

systems. Internal current-limiting circuitry protects the

input supply against overload. Thermal overload pro-

tection limits power dissipation and junction tempera-

ture.

♦ +2.7V to +5.5V Input Range

♦ Programmable Current Limit

0.2A to 1.2A Range

±20% Accuracy

♦ 1.2A Continuous Load Current

♦ 1.8A Short-Circuit Current

♦ Low Quiescent Current

The MAX893L’s maximum programmed current limit is

1.2A. The typical short-circuit current is 1.5 times the

programmed current; therefore, a 1.2A programmed

limit will result in a 1.8A short-circuit current limit. The

current limit through the switch is programmed with a

resistor from SET to ground. The quiescent supply cur-

rent is a low 13µA. When the switch is off, the supply

current decreases to 0.1µA.

13µA at V = 3.3V

0.1µA with Switch Off

♦ Thermal Shutdown

♦ FAULT Indicator Output

♦ 0.07Ω On-Resistance

The MAX893L is available in an 8-pin SO package.

________________________Applications

Ordering Information

USB Ports

PART

TEMP. RANGE

PIN-PACKAGE

USB Hubs

MAX893LESA

-40°C to +85°C

8 SO

PCMCIA Slots

Access Bus Slots

Portable Equipment

Typical Operating Circuit

Pin Configuration

TOP VIEW

INPUT

OUT

OUTPUT

0.1µF*

FAULT

MAX893L

100k

OUT

FAULT

GND

ON/OFF

MAX893L

OUT

SET

1µF

SET

GND

SET

*USB SPECIFICATIONS REQUIRE HIGHER CAPACITANCE.

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7 8

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