Maxim > Products > Power and Battery Management > MAX891L, MAX892L

MAX891L, MAX892L

Current-Limited, High-Side P-Channel Switches with Thermal Shutdown

Low-Resistance P-Channel Switches with Adjustable, Accurate Current Limit Protects Systems and USB

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX891L/MAX892L smart, low-voltage, P-channel, MOSFET power switches are intended for high-side load-switching applications. These switches operate with inputs from 2.7V to 5.5V, making them ideal for both 3V and 5V systems. Internal current-limiting circuitry protects the input supply against overload. Thermal-overload protection limits power dissipation and junction temperatures.

The MAX891L/MAX892L's maximum current limits are 500mA and 250mA, respectively. The current limit through the switch is programmed with a resistor from SET to ground. When the switch is on, the quiescent supply current is a low 13µA. When the switch is off, the quiescent current decreases to 0.1µA.

The MAX891L/MAX892L are available in 8-pin µMAX® packages.

Data Sheet

Download	Rev 0	(PDF, 120kB)
E-Mail

Key Features

Ultra-Small µMAX Package-Only 1.11mm High
2.7V to 5.5V Input Range
Programmable Current Limit
Low 13µA Quiescent Current at V_IN = 3.3V, 0.1µA Switch Off
Thermal Shutdown
FAULT-bar Indicator Output
On-Resistances:

0.12Ω (MAX891L)
0.25Ω (MAX892L)

Applications/Uses

Access Bus Slots
PCMCIA Slots
Portable Equipment

Key Specifications:

Current Limit and USB Power Switches

Part Number

Power Switches

Current Limit
(mA)

Fault Indicator

Current Limit Accuracy
(%)

Current Limit Set By

Lowest Adj. Setting
(A)

R_ON
(Ω)

V_SUPPLY
(V)

Oper. Temp.
(°C)

Package/Pins

Budgetary Price

≥

≤

typ

min

max

See Notes

MAX891L

500

Yes

Resistor

0.1

0.12

2.7

5.5

-40 to +85

µMAX/8

$1.47 @1k

MAX892L

250

0.05

0.25

µMAX/8

$1.47 @1k

See All Current Limit and USB Power Switches (78)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Notes and Comments

150mΩ/0.5A (MAX891L)
300mΩ/0.25A (MAX892L)

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-1223 Rev 0; 1997-06-01
This page last modified: 2008-07-14