DESCRIPTION

· The UCC3912 family of hot swap power managers provides complete power management, hot swap capability, and circuit breaker functions.

· The device requires only a fault timing capacitor, CT, for operation, apart from supply bypassing.

· All control and housekeeping functions are integrated and externally programmable, including fault current level, maximum output-sourcing current, maximum fault time, and startup delay.

· In the event of a constant fault, the internal fixed 3% 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.

FEATURES

· Integrated 0.15-Ω Power MOSFET.

· 3-V to 8-V Operation.

· Digital Programmable Current Limit from 0 A to 3 A.

· Electronic Circuit Breaker Function.

· 1µA ICC When Disabled.

· Programmable On-Time and Start Delay.

· Fixed 3% Duty Cycle.

· Unidirectional Switch.

· 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, Low-Thermal Resistance Packaging.

APPLICATIONS

· Hot Swap Power Management.

· Circuit Breaker Functions.

· Applications requiring fast output capacitor charging.

· Power management in critical applications.