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MB3802

Fujitsu Media Devices
Part Number MB3802
Manufacturer Fujitsu Media Devices
Description Power Management Switch
Published Sep 11, 2005
Detailed Description FUJITSU SEMICONDUCTOR DATA SHEET DS04-27601-2E ASSP For Power Supply Applications Power Management Switch MB3802 s DE...
Datasheet PDF File MB3802 PDF File

MB3802
MB3802

Overview
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 VINA VINB SWINA SWINB SWOUTA SWOUTB DCGA DCGB DLYA Description These pins switch ON at High level and OFF at Low level.
They serve as power-supply pins for the DC/DC converter to generate the switch gate voltage.
Switch Input pins: Two common pins are assigned to SWINA and SWINB.
They serve as power-supply pins for the switch-OFF circuit which starts at 1.
5V min.
Switch output pins: Two common pins are assigned to SWOUTA and SWOUTB.
When DCGA and DCGB are High level, the loaddischarge circuit sta...


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