Integrated 0.15-Ω Power MOSFET
7-V to 15-V Operation
Digital-Programmable Current Limit from
0 A to 3 A
100-μA ICC When Disabled
Programmable On Time
Programmable Start Delay
Fixed 2% Duty Cycle
Thermal Shutdown
Fault-Output Indicator
Maximum-Output Current Can Be Set to 1 A
Above the Programmed-Fault Level or to a
Full 4 A
Power SOIC and TSSOP, Low Thermal
Resistance Packaging

description
The UCC3915 programmable hot swap power manager provides complete power-management, hot-swap
capability, and circuit breaker functions. The only external component required to operate the device, other than
power supply bypassing, is the fault-timing capacitor, CT. All control and housekeeping functions are integrated,
and externally programmable. These include the fault current level, maximum output sourcing current,
maximum fault time, and startup delay. In the event of a constant fault, the internal fixed 2% duty cycle ratio limits
average output power.
The internal 4-bit DAC allows programming of the fault-level current from 0 A to 3 A with 0.25-A resolution. The
IMAX control pin sets the maximum-sourcing current to 1 A above the trip level or to a full 4 A of output current
for fast output capacitor charging.