LTC1710
SMBus Dual Monolithic
High Side Switch
FEATURES
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DESCRIPTION
The LTC
廬
1710 SMBus dual switch has two built-in 0.4鈩?
300mA switches that are controlled by a 2-wire SMBus
interface. With a low standby current of 14碌A(chǔ) (3.3V), the
LTC1710 operates over an input voltage range of 2.7V to
5.5V while maintaining the SMBus specified 0.6V V
IL
and
1.4V V
IH
input thresholds.
Using the 2-wire interface, CLK and DATA, the LTC1710
follows SMBus鈥檚 Send Byte Protocol to independently
control the two 0.4鈩?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.
Two 0.4
鈩?/div>
/300mA N-Channel Switches
Available in MS8 and SO-8 Packages
SMBus and I
2
C Compatible
0.6V V
IL
and 1.4V V
IH
for DATA and CLK
Low Standby Current: 14碌A(chǔ)
Separate Drain Connection to SW0
Three Addresses from One Three-State Address Pin
Independent Control of Up to Six Switches
Built-In Power-On Reset Timer
Built-In Undervoltage Lockout
APPLICATIONS
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Handheld Computer Power Management
Computer Peripheral Control
Laptop Computer Power Plane Switching
Portable Equipment Power Control
Industrial Control Systems
ACPI SMBus Interface
TYPICAL APPLICATION
Switch Voltage Drop
vs Load Current
V
CC
2.7V TO 5.5V
10碌F
8
SW0
CLOCK
FROM SMBus
DATA
AD1
(PROGRAMMABLE)
5
6
3
SW1
LTC1710
4
1710 TA01
SW0D
0V TO V
CC
1
500
T
A
= 25擄C
SWITCH VOLTAGE DROP (mV)
10碌F
400
300
2
CHARGE
PUMP
LOAD 1
200
V
CC
= 2.7V
100
V
CC
= 3.3V
V
CC
= 5V
0
0
200
100
300
LOAD CURRENT (mA)
400
1710 TA02
7
LOAD 2
U
U
U
1
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