SLVSHL0B June 2024 – July 2024 TPSM81033
ADVANCE INFORMATION
The purpose of the output discharge function is to ensure a defined down-ramp of the output voltage and to let the output voltage close to 0V quickly when the device is being disabled. TPSM81033 can implement output discharge function by PG function that requires a RDummy resistor connected between PG pin and Vout pin. PG is an open drain NMOS architecture with up to 50mA current capability, the PG pin becomes logic high when the output voltage reaches the target value, so the dummy load resistor does not lead any power loss during normal operation. When the EN pin gets low, the TPSM81033 is disabled and meanwhile the PG pin gets low with a typical 33μs glitch time (tglitch). With PG pin keeps low, the RDummy works as a dummy load to discharge output voltage. Changing RDummy can adjust the output discharge rate.