LTC1710 Datasheet, PDF (1/8 Pages) Linear Technology – SMBus Dual Monolithic High Side Switch

LTC1710
SMBus Dual Monolithic
High Side Switch
FEATURES
s _{Two 0.4Ω/300mA N-Channel Switches}
s _{Available in MS8 and SO-8 Packages}
s _{SMBus and I}²_{C Compatible}
s _{0.6V VIL and 1.4V VIH for DATA and CLK}
s _{Low Standby Current: 14µA}
s _{Separate Drain Connection to SW0}
s _{Three Addresses from One Three-State Address Pin}
s _{Independent Control of Up to Six Switches}
s _{Built-In Power-On Reset Timer}
s _{Built-In Undervoltage Lockout}
U
APPLICATIONS
s _{Handheld Computer Power Management}
s _{Computer Peripheral Control}
s _{Laptop Computer Power Plane Switching}
s _{Portable Equipment Power Control}
s _{Industrial Control Systems}
s _{ACPI SMBus Interface}
DESCRIPTION
The LTC^®1710 SMBus dual switch has two built-in 0.4Ω/
300mA switches that are controlled by a 2-wire SMBus
interface. With a low standby current of 14µA (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’s Send Byte Protocol to independently
control the two 0.4Ω 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.
TYPICAL APPLICATION
V_CC
2.7V TO 5.5V
SW0D
0V TO V_CC
10µF
8
1
10µF
FROM SMBus
5
CLOCK
6
DATA
3
AD1
(PROGRAMMABLE)
SW0
CHARGE
PUMP
SW1
LTC1710
4
2
LOAD 1
7
LOAD 2
1710 TA01
Switch Voltage Drop
vs Load Current
500
T_A = 25°C
400
300
200
100
0
0
V_CC = 2.7V
V_CC = 3.3V
V_CC = 5V
100
200
300
400
LOAD CURRENT (mA)
1710 TA02
1