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.