HM3800S Datasheet | H&M Semiconductor

BOOST CONVERT CONTROL IC GENERAL DESCRIPTION The HM3800 is a boost topology switching regulator control IC for battery-used applications field. The HM3800 includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for paring output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operating mode or standby mode. Features ˙Wide supply voltage operating range: 1.8 to 15V ˙Reference voltage precision: 4% ˙Low current consumption: Operation Mode 5.5m A Standby-by Mode 1μA ˙High speed oscillator frequency: 1MHz max. ˙Programmable Soft Start function (SS) ˙Short Circuit Protection function(SCP) ˙Totem-pole output with adjustable on/off current (for NPN transistors or n-channel MOSFET) ˙Logic level control stand-by mode function ˙Package: SOP8/TSSOP8/MSOP8/SOP8(EP) SOP8 TSSOP 8 TYPICAL APPLICATION ˙Digital Camera ˙PDA ˙Portable Equipment MS OP 8 FUNCTIONAL BLOCK DIAGRAM Reference voltage supply 1.25V 0.8V 0.1V Sawtooth wave oscillator 0.1V 36kΩ + Error Amp. p. + + + Output drive control circuit 0.5V 500KΩ DTC 0.6V 0.22V Soft start & SCP circuit 5 30kΩ MARK VIEW 1 2 3 4 PIN...