NW5139大电流升压.pdf

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NW5139大电流升压

ÓÉ Foxit PDF Editor ±à¼- °æÈ¨ËùÓÐ (c) by Foxit Software Company, 2004 ½öÓÃÓÚÆÀ¹À¡£½öÓÃÓÚÆÀ¹À¡£ QQ 394233008 TEL cash Technology NW5139 BOOST CONVERT CONTROL IC GENERAL DESCRIPTION The NW5139B is a boost topology switching regulator control IC for battery-used applications field. The NW5139B includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing 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 ˙W ide supply voltage operating range: 1.8 to 15V ˙Reference voltage precision: 2% ˙Low current consumption: Operation Mode 5.5mA 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 TS SOP8 ˙Package: SOP8/TSSOP8/MSOP8 TYPICAL APPLICATION ˙Digital Camera MS OP8 ˙PDA ˙Portable Equipment Rev0.2 Nov. 25, 2005 ÓÉ Foxit PDF Editor ±à¼- °æÈ¨ËùÓÐ (c) by Foxit Software Company, 2004

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