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MB39A105

Fujitsu
Part Number MB39A105
Manufacturer Fujitsu
Description 1-Channel DC/DC Converter IC
Published Mar 29, 2006
Detailed Description FUJITSU SEMICONDUCTOR DATA SHEET DS04-27233-2E ASSP For Power Supply Applications (General Purpose DC/DC Converter) 1...
Datasheet PDF File MB39A105 PDF File

MB39A105
MB39A105

Overview
FUJITSU SEMICONDUCTOR DATA SHEET DS04-27233-2E ASSP For Power Supply Applications (General Purpose DC/DC Converter) 1-ch DC/DC Converter IC for low voltage MB39A105 s DESCRIPTION The MB39A105 is 1-channel DC/DC converter IC using pulse width modulation (PWM).
This IC is ideal for up conversion.
The minimum operating voltage is low (1.
8 V) , and the MB39A105 is best for built-in power supply such as LCD monitors.
Also the short-circuit protection detection output function prevents input/output short on a chopper type up-converter.
This product is covered by US Patent Number 6,147,477.
s FEATURES • • • • • • • • • Power supply voltage range : 1.
8 V to 6 V Reference voltage accuracy : ± 1 % High-frequency operation capability : 1 MHz (Max) Built-in standby function: 0 µA (Typ) Built-in timer-latch short-circuit protection circuit Built-in short-circuit protection detection output function Built-in soft-start circuit independent of loads Built-in totem-pole type output for Nch MOS FET Package : TSSOP-8P (Thickness 1.
1 mm Max) s PACKAGE 8-pin plastic TSSOP (FPT-8P-M05) www.
DataSheet4U.
com www.
DataSheet4U.
com MB39A105 s PIN ASSIGNMENT (TOP VIEW) −INE CSCP VCC SCPOD 1 2 3 4 8 7 6 5 FB RT GND OUT (FPT-8P-M05) 2 MB39A105 s PIN DESCRIPTION Pin No.
1 2 3 4 5 6 7 8 Symbol −INE CSCP VCC SCPOD OUT GND RT FB I/O I   O O   O Descriptions Error amplifiers (Error Amp) inverted input terminal Timer-latch short-circuit protection capacitor connection terminal Power supply terminal Open drain output terminal for short-circuit protection detection During timer-latch short-circuit protection operation : Output “High-Z” During normal operation : Output “L” External Nch FET gate drive terminal Ground terminal Triangular wave oscillation frequency setting resistor connection terminal Error Amplifier (Error Amp) output terminal 3 MB39A105 s BLOCK DIAGRAM VCC 3 −INE 1 SCPOD 4 VREF Error Amp − + + (0.
5 V ± 1%) + − PWM Comp.
Drive Nch 5 OUT FB 8 VREF SCP Comp.
+...


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