TOREX SEMICONDUCTOR Xc9301
The XC9301/XC9302 series are step-up/down DC/DC converter controller ICs with fast, low ON resistance drivers built-in. The XC9302 series switches from PWM to PFM control during light loads and the series offers high efficiencies from light loads through to large output currents.GENERAL DESCRIPTION
A versatile, large output current, step-up/down DC/DC converter can be realized using only 4 type of basic external components two transistors, one inductor, two diodes and capacitors. Output voltage is selectable in 0.1V increments within a 2.4V ~ 6.0V (±2.5% accuracy) range and switching frequency is set at 180kHz or 300kHz. Soft-start time is internally set to 10ms which offers protection against inrush currents when the power is turned on and also against voltage overshoot. During shutdown (CE pin = L), consumption current can be reduced to as little as 0.5μA or less.●
APPLICATIONS
●Mobile phones●PDAs
●Palmtop computers
●Portable audio equipment
●Various power supplies
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FEATURES
Input Voltage Range : 2.0V ~ 10V Output Voltage Range : 2.4V ~ 6.0V (±2.5% accuracy) (selectable in 0.1V increments) Oscillation Frequency : 180kHz, 300kHz (±15% accuracy) Output Current : 250mA(VIN=2.4V, VOUT=3.3V) Efficiency : 81% @ VOUT=5.0V, 78% @ VOUT=3.3V Stand-By : ISTB = 0.5μA (...