LTC1710 Datasheet

• Two 0.4Ω/300mA N-Channel Switches
• Available in MS8 and SO-8 Packages
• SMBus and I²C Compatible
• 0.6V V_IL and 1.4V V_IH for DATA and CLK
• Low Standby Current: 14µA
• 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

• Handheld Computer Power Management
• Computer Peripheral Control
• Laptop Computer Power Plane Switching
• Portable Equipment Power Control
• Industrial Control Systems
• ACPI SMBus Interface

The LTC1710 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 on-board 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 peripherals using a different power supply.