OVERVIEW

The SM6702 series are step-up DC/DC converter ICs, fabricated using NPC’s Molybdenum-gate CMOS process. They incorporate reference voltage source, error amplifier, oscillator, start-up circuit, PFM (Pulse Frequency Modulation) control circuit into a single chip. The only external components required are a Coil, Diode and output smoothing capacitors to form a step-up DC/DC converter. They employ PFM voltage control circuits to achieve high efficiency, stable constant-voltage output.

FEATURES

■ Power dissipation : 24 μW at VIN = 1.5 V, VOUT = 3.0 V, IOUT = 100 μA

■ Start-up input voltage : 0.9 V (max) at RL = 30 k?

■ Output voltage : 2.2 V to 3.3 V, available in 0.1 Vstep

■ High efficiency : 85 at VIN = 1.5 V, VOUT = 3.0 V, IOUT = 1 mA

■ Low ripple voltage

■ Package : SOT23-3, SOT89-3

APPLICATIONS

■ PDA, Mobile IT equipment

■ Digital Stil Camera

■ Pager

■ Constant-voltage sources for battery-operated equipment

■ Local voltage sources