MB3802

FUJITSU SEMICONDUCTOR DATA SHEET DS04-27601-2E ASSP For Power Supply Applications Power Management Switch MB3802 s DESCRIPTION The MB3802 is a power management switch incorporating two switch circuits with extremely low ON resistance. NO diode is required because the switch block is configured with an N-ch MOS to prevent reverse current at switch OFF. The MB3802 starts at a very low voltage (typical VIN > 2.2V) and a stable ON resistance is obtained irrespective of the switching voltage because the internal DC/DC converter applies the optimum voltage for the N-ch MOS gate at switch ON. Moreover, the load-side capacitor is discharged at switch OFF, and the power supply for various power supply systems is switched efficiently. s FEATURES Extremely low ON resistance: RON = 0.12 Ω (typical) RON = 0.06 Ω (typical at parallel connection) Reverse current protection at load side at switch OFF Operation start at low input voltage: VIN > 2.2 V (typical) Low power consumption At switch OFF: IIN (input voltage) = 0 µA, VIN = 0 V At switch ON: IIN = 230 µA, VIN = 5 V Load discharge function External control of ON/OFF time Break-before-make operation s PACKAGE 16-pin plastic SOP (FPT-16P-M04) MB3802 s PIN ASSIGNMENT (TOP VIEW) GNDA DCGA SWINA SWINA SWINB SWINB DCGB GNDB 1 2 3 4 MB3802 5 6 7 8 12 11 10 9 SWOUTB SWOUTB DLYB VINB 16 15 14 13 VINA DLYA SWOUTA SWOUTA (FPT-16P-M04) s PIN DESCRIPTION (SCSI Interface) Pin No. 16 9 3, 4 5, 6 13, 14 11, 12 2 7 15 Pin symbol V...