MB39C001 Datasheet | Fujitsu Semiconductor Limited

FUJITSU SEMICONDUCTOR DATA SHEET DS04-27243-1E ASSP For Power Supply Applications (Switching FET Integrated DC/DC Converter) 1ch PFM/PWM Synchronous Rectification Step-down Regulator MB39C001 s DESCRIPTION The MB39C001 is a synchronous rectification type of single-channel, step-down DC/DC converter IC using current mode control. The MB39C001 integrates switching FETs, an oscillator, error amplifier, voltage detector, and a reference voltage generator in a 18-pin BCC package. The required external ponents are only a coil and decoupling capacitors. The MB39C001 is small in size, and can achieve a DC/DC converter highly effective in the full load range, and it is the best for internal power supplies for portable devices such as cellular phones, PDAs and DSC. s Features - - - - - - - High efficiency Quiescent current Output current (DC/DC) Input voltage range Oscillation frequency No flyback diode needed Low dropout operation : : : : : 96% Max 20 µA (in PFM mode) 600 m A Max 2.5 V to 5.5 V 1.0 MHz (in PWM mode) : 100% on-duty support (Continued) s PACKAGE 18-pin plastic BCC (LCC-18P-M05) .. .. (Continued) - High-precision reference voltage generator integrated : 1.25 V ± 2% (with no load) - Output voltage select function integrated : Capable of selecting internal setting (3 bits) or external setting - Built-in switching FETs : PMOS 0.43 Ω (Typ) , NMOS 0.32 Ω (Typ) - Current mode control providing quick transition response to inputs/loads - Built-in temperature protection function - Low consumption current at shutdown mode : 1 µA or less - Built-in undervoltage lockout protection circuit (UVLO) : Circuit actuation voltage of 2.3 V (Typ) - Small package : BCC-18P MB39C001 s PIN ASSIGNMENT (TOP VIEW) DVDD1 VSET1 VSET2...