Maxim MAX869LC-D, MAX869LEEE Datasheet

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_______________General Description

The MAX869L P-channel load switch features an accu­rate user-set current limit and low on-resistance. This
switch is designed to protect your power source from
shorts and surges by limiting current and preventing
the system supply from being pulled low. The input volt­age range is 2.7V to 5.5V.

The MAX869L features a 2A, 45mΩ switch controlled
by a logic signal. Current-limit accuracy is ±21%, and
can be set from 400mA to 2.4A using a single resistor.

The device has a low 12µA quiescent supply current,
which reduces to 2µA max in shutdown. It features ther­mal-shutdown protection and a logic-signal output pin
(FAULT) that signals when there is an overcurrent or
overtemperature condition.

For other devices in this family, consult the

Selector

Guide

.

________________________Applications

Universal Serial Bus (USB)
Notebook Computers
Personal Communicators
Palmtop Computers
Hand-Held Instruments
Portable Medical Instruments

____________________________Features

♦ Very Small Footprint (16-pin QSOP is the same

size as an 8-pin SO)

♦ Low Resistance: 45mΩ at 3V
♦ ±21%-Accurate, User-Set Current Limit
♦ 12µA (typ) Quiescent Current
♦ 0.01µA (typ) Shutdown Current
♦ 0.04µA (typ) Leakage to Output when Switch

is Off

♦ 2.7V to 5.5V Input Range
♦ Thermal Shutdown
♦

FAULT Output

MAX869L

2A, Current-Limited, High-Side

P-Channel Switch with Thermal Shutdown

________________________________________________________________

Maxim Integrated Products

1

_____________________Selector Guide

19-1278; Rev 0; 8/97

PART

MAX869LC/D
MAX869LEEE -40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

Dice*
16 QSOP

______________Ordering Information

__________Typical Operating Circuit

*

Dice are specified at TA= +25°C.

Pin Configuration appears at end of data sheet.

300

MAX892L

PART

150

MAX891L

45

MAX869L

R

ON

AT 3V

(mΩ)

0.25

0.5

2

NOMINAL

CURRENT

(A)

Single

Single

Single

COUNT

8 µMAX

8 µMAX

16 QSOP

PACKAGE

0.5 8 SODual150

MAX894L

0.25 8 SODual300

MAX895L

1 Single 8 SO90

MAX890L

MAX869L

IN

FAULT

OUT

INPUT

2.7V TO 5.5V
1µF

*

0.1µF*

ON/OFF

R

SET

OUTPUT
UP TO 2A

100k

*FOR USB APPLICATIONS, C

IN

= 1µF, C

OUT

= 120µF

ON

SET

GND

MAX869L

2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown

2 _______________________________________________________________________________________

Note 1: Guaranteed by design. Derived from the I

SET

current ratio; current-limit amplifier and external set resistor accuracies.

Note 2: Tested with I

OUT

= 200mA and V

SET

raised until (VIN- V

OUT

) ≥ 0.8V.

Note 3: Specifications to -40°C are guaranteed by design, not production tested.

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= 3V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

IN to GND ..................................................................-0.3V to 6V

ON, FAULT to GND ....................................................-0.3V to 6V

SET, OUT to GND ......................................-0.3V to (V

IN

+ 0.3V)

Maximum Continuous Switch Current .....................................3A

Continuous Power Dissipation (T

A

= +70°C)

QSOP (derate 8.3mW/°C above +70°C) .......................667mW

Operating Temperature Range

MAX869LEEE.....................................................-40°C to +85°C

Storage Temperature Range ........................... -65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

ON = IN, VIN= V

OUT

= 5.5V

VIN= 5V, I

OUT

= 500mA

VIN= 3V, I

OUT

= 500mA

VIN= 5V, ON = GND, I

OUT

= 0A

VIN= 5V, I

OUT

= 500mA

20% current overdrive, VCC= 5V

V

FAULT

= 5.5V, V

SET

= 1V

VIN= 2.7V to 3.6V

VIN= 2.7V to 5.5V

I

SINK

= 1mA, V

SET

= 1.4V

V

SET

= 1.24V, I

OUT

= 0A

I

OUT

= 1A, V

OUT

> 1.6V

ON = IN, VIN= 5.5V, V

OUT

= 0V
Rising edge, 1% hysteresis
VIN= 4.75V

VON= 5.5V

R

SET

= 1% tolerance (Note 1)

VIN= 4.5V to 5.5V

CONDITIONS

VIN= 3.0V

mΩ

45 90

µs2 10 30

On-Resistance

Turn-Off Time

µs

200

Turn-On Time

100 300

µs4Fast-Current-Loop Response Time

µs10Slow-Current-Loop Response Time

µA0.05 1

FAULT Logic Output High Leakage Current

V0.4

FAULT Logic Output Low Voltage

µA0.05 ±3I

SET

Bias Current

µA0.01 ±1

ON Input Leakage

V

2.4

ON Input High Voltage

µA0.01 2Off-Supply Current

µA12 20

V2.7 5.5Operating Voltage

Quiescent Current

2.0

V0.8

ON Input Low Voltage

A/A810 955 1100I

OUT

to I

SET

Current Ratio

µA0.04 30Off-Switch Current

V2.0 2.3 2.6Undervoltage Lockout

38 70

A0.40 2.4Nominal Current-Limit Set Range

UNITSMIN TYP MAXPARAMETER

V

SET

required to turn the switch off (Note 2) V1.178 1.240 1.302Current-Limit-Amplifier Threshold

MAX869L

2A, Current-Limited, High-Side

P-Channel Switch with Thermal Shutdown

_______________________________________________________________________________________ 3

Note 1: Guaranteed by design. Derived from the I

SET

current ratio; current-limit amplifier and external set resistor accuracies.

Note 2: Tested with I

OUT

= 200mA and V

SET

raised until (VIN- V

OUT

) ≥ 0.8V.

Note 3: Specifications to -40°C are guaranteed by design, not production tested.

ELECTRICAL CHARACTERISTICS

(VIN= 3V, TA= -40°C to +85°C, unless otherwise noted.) (Note 3)

VIN= 5V, I

OUT

= 500mA µs2 30

ON = IN, VIN= V

OUT

= 5.5V

VIN= 5V, I

OUT

= 500mA

Turn-Off Time

VIN= 5V, ON = GND, I

OUT

= 0A

I

SINK

= 1mA, V

SET

= 1V

I

OUT

= 1A, V

OUT

> 1.6V

ON = IN, VIN= 5.5V, V

OUT

= 0V
Rising edge, 1% hysteresis
VIN= 4.75V

R

SET

= 1% tolerance (Note 1)

CONDITIONS

VIN= 3.0V

mΩ

90

µs400

On-Resistance

Turn-On Time

V0.4

FAULT Logic Output Low Voltage

µA2.5Off-Supply Current

µA25

V2.9 5.5Operating Voltage

Quiescent Current

A/A765 1145I

OUT

to I

SET

Current Ratio

µA30Off-Switch Current

V2.0 2.85Undervoltage Lockout

70

A0.40 2.4Nominal Current-Limit Set Range

UNITSMIN TYP MAXPARAMETER

V

SET

required to turn the switch off (Note 2) V1.14 1.34Current-Limit-Amplifier Threshold