LD7282A

LD7282A 5/10/2006 VFM STEP-UP DC/DC CONVERTER REV: 01 General Description The LD7282A is a VFM step-up DC/DC converter with ultra low supply current. The CMOS design results in less power consumption and high capability for battery-powered instruments. With a built-in switching MOSFET, the LD7280 takes only three external components (using a coil, diode & capacitor connected externally) to achieve the low ripple & high efficiency. As well, using chip enable function will make it possible to supply current on standby minimized. This converter also features a very low switch off, bias current of 5.0µA typical. Features Minimum external component counts Ultra low input current in switch off (Typ. 5µA) ±2% High accuracy of output voltage Low ripple and low noise Low start-up voltage, 0.75V at no load. 85% efficiency with low cost inductor Applications Power source for battery -powered equipment Power source for DSC, PDA, Camcorders, VCRs, Pagers, and Hand-held communication equipment Typical Application 47µH VIN L D1 5817SL LX VOUT NC CE GND VOUT COUT 22µF L range: 10µH~120µH LD7282A Fig. 1 Leadtrend Technology Corporation LD7282A-DS-01 May, 2006 1 LD7282A Pin Configuration SOT-89 (TOP VIEW) YWP 82A XX 12 3 GND VOUT LX SOT-25 (TOP VIEW) LX GND 54 Y WP 82A XX 123 CE VOUT NC LX GND Y : Year code (D: 2004, E: 2005…..) W : Week code P : LD72.. (Product family code) XX : Output Voltage 54 Y WP 82A XX 123 Y CE VOUT NC The PB-free package is identi...