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LTC1710

SMBus Dual Monolithic

High Side Switch

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Two 0.4

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Available in MS8 and SO-8 Packages

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s

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Low Standby Current: 14

µA

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Separate Drain Connection to SW0

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Three Addresses from One Three-State Address Pin

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Independent Control of Up to Six Switches

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Built-In Power-On Reset Timer

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Built-In Undervoltage Lockout

FEATURES

The LTC

Ω/

300mA switches that are controlled by a 2-wire SMBus

interface. With a low standby current of 14

µA (3.3V), the

LTC1710 operates over an input voltage range of 2.7V to

Using the 2-wire interface, CLK and DATA, the LTC1710

follows SMBus’s Send Byte Protocol to independently

control the two 0.4

Ω internal N-channel power switches,

which are fully enhanced by onboard charge pumps.

The LTC1710 has one three-state programmable

address pin that allows three different addresses for a total

of six available switches on the same bus. The LTC1710

also features a separate user-controlled drain supply

(SW0D) to Switch 0 so that it can be used to control

SMBus peripherials using a different power supply.

, LTC and LT are registered trademarks of Linear Technology Corporation.

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Handheld Computer Power Management

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Computer Peripheral Control

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Laptop Computer Power Plane Switching

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Portable Equipment Power Control

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Industrial Control Systems

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ACPI SMBus Interface

LOAD CURRENT (mA)

0

200

300

400

1710 TA02

100

0

100

200

300

500

400

Switch Voltage Drop

vs Load Current

CHARGE

PUMP

81

2

10

µF

10

µF

7

5

CLOCK

DATA

6

FROM SMBus

3

AD1

(PROGRAMMABLE)

4

1710 TA01

2.7V TO 5.5V

SW0D

LTC1710

LOAD 1

SW0

SW1

LOAD 2