MB3827

FUJITSU SEMICONDUCTOR DATA SHEET DS04-27222-1E ASSP For Power Supply Applications 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down MB3827 s DESCRIPTION The MB3827 is a pulse width modulation (PWM) type 6-channel DC/DC converter IC with, synchronous rectification for voltage step-up and step-down. The MB3827 is ideal for low voltage, high efficiency, compact applications and for down conversion and up/down conversion (with two types of voltage step-up/step-down methods allowing input/output relations to be set independently). In addition the MB3827 features a built-in self-supply power channel (channel 7) providing a wide range of supply voltages, and operates from two dry-cell batteries. This product is ideal for high performance portable devices such as digital still cameras. s FEATURES Compatible with step-up/step-down switching methods (channel 1) Compatible with step-up/step-down Zeta methods (channels 2 to 6) Synchronous rectification (channels 1 and 2) Low start-up voltage : 1.8 V (channel 7 for self-power supply) Power supply voltage range : 4 V to 13 V (channels 1 to 6) Built-in high-precision reference voltage generator : 2.5 V±1% Oscillator frequency range : 100 kHz to 800 kHz Error amplifier output for soft start (channels 1 to 6) s PACKAGE 64-pin plastic LQFP (FPT-64P-M03) 2 XENB1-6 -IN7-2 -IN7-1 MB3827 GND(O)5,6,7 OUT(A)6 -IN(C)6 -IN(A)6 OUT7 s PIN ASSIGNMENT DTC5 +IN7 RB7 -IN6 FB6 FB7 9 8 ...