LTC1473IGN#PBF

LTC1473 is a dual PowerPath™ switch driver. It provides a power management solution for single and dual battery notebook computers and other portable equipment. It drives two sets of back to-back N-channel MOSFET switches to route power to the input of the main system switching regulator. An internal boost regulator provides the voltage to fully enhance the logic level N-channel MOSFET switches. It senses current to limit surge currents both into and out of the batteries and the system supply capacitor during switch-over transitions or during fault conditions. A user-programmable timer monitors the time the MOSFET switches are in current limit and latches them off when the programmed time is exceeded. It is used in applications such as notebook computers, portable instruments, handi-terminals, portable medical equipment, portable industrial control equipment etc.

• Power path management for systems with multiple DC sources
• All N-channel switching to reduce power losses and system cost
• Supply operating range from 4.75V to 30V
• Capacitor inrush and short-circuit current limited
• User-programmable timer to limit switch dissipation
• Supply current is 100µA typ at (VIN1 = VDIODE = 5V, VIN2 = 0V, VSENSE+ = VSENSE– = 20V)
• VGG regulator operating frequency is 30KHz typ at (TA = 25°C)
• Gate drive rise time is 33µs typ at (CGS = 1000pF, VSAB1 = VSAB2 = 0V)
• Gate drive fall time is 2µs typ at (CGS = 1000pF, VSAB1 = VSAB2 = 20V)
• Operating temperature range from -40°C to 85°C, package style is 16-lead narrow plastic SSOP

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