LTC1623 Datasheet | Linear Technology

LTC1623 SMBus Dual High Side Switch Controller Features s s s s s s s s s s s DESCRIPTION The LTC ®1623 SMBus switch controller is a slave device that controls two high-side N-channel MOSFETs on either the SMBus or the I2C bus. The LTC1623 operates with an input voltage from 2.7V to 5.5V with a low standby current of 14µA (at 3.3V). In accordance with the SMBus specification, the LTC1623 maintains the 0.6V VIL and 1.4V VIH input thresholds throughout the supply voltage range. Using the 2-wire interface, CLK and DATA, the LTC1623 monitors the bus for a start condition (DATA going from high to low while CLK is high). Once detected, the LTC1623 pares its address with the first (address) byte sent over the bus from the master. If matched, the LTC1623 will execute the second (mand) byte from the master and independently control the built-in charge pumps to drive two external switches. The LTC1623 has two three-state programmable address pins, thus allowing eight different addresses and a total of sixteen available switches on the same bus. , LTC and LT are registered trademarks of Linear Technology Corporation. SMBus and I2C patible Built-In Charge Pumps Drive N-Channel Switches 16 Available Switches on the Same Bus 0.6V VIL and 1.4V VIH for DATA and CLK Available in 8-Lead MSOP and S0 Packages Low Standby Current: 14µA Eight Addresses from Two Three-State Address Pins Internal Power-On Reset Timer Internal Undervoltage Lockout No Need for External Pull-Up Resistors at Output No Need for Secondary Power Source U APPLICATIONS s s s s s puter Peripheral Control Laptop puter Power Plane Switching Portable Equipment Power Control Industrial Control Systems Handheld Equipment TYPICAL APPLICATION VCC 2.7V TO 5.5V 10µF VCC (FROM SMBus) CLK DATA LTC1623 (PROGRAMMABLE) AD0 AD1 GND LOAD1 LOAD2 GA GB Q1 Q2 - TJ = 25°C 12 GATE VOLTAGE (V) 10 8 6 4 2 0 0 1 2 3 4 SUPPLY VOLTAGE (V) 5 6 1623 G01 - SILICONIX Si69260Q 1623 TA01 Gate Drive...