MB39A105 Datasheet | Fujitsu Semiconductor Limited

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) .. .. 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) 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 MB39A105 s BLOCK DIAGRAM VCC 3 - INE 1 SCPOD...