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XC9503 Datasheet(PDF) 1 Page - Torex Semiconductor |
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XC9503 Datasheet(HTML) 1 Page - Torex Semiconductor |
1 / 32 page 1/32 XC9503 Series 2ch.Step-Down DC/DC Controller ICs ■ GENERAL DESCRIPTION XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC controller ICs. Since the series has a built-in 0.9V reference voltage (accuracy ±2%), 0.9V to 6.0V can be set using external components. With a 300kHz frequency, the size of the external components can be reduced. Switching frequencies of 180kHz & 500kHz are also available as custom-designed products. The control of the XC9503 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is highly efficient from light loads through to large output currents. Noise is easily reduced with PWM control since the frequency is fixed. The series gives freedom to select control suited to the application. Soft-start time is internally set to 10msec and offers protection against in-rush currents when the power is switched on and also protects against voltage overshoot. ■ APPLICATIONS ● PDAs ● Palmtop computers ● Digital cameras ● Various multi function power supplies ■ TYPICAL APPLICATION CIRCUIT ■ FEATURES 2 ch DC/DC Controller (Step-Down & Down) Input Voltage Range : 2.0V ~ 10V Power Supply Voltage Range : 2.0V ~ 10V Output Voltage Range : 0.9V ~ 6.0V (set by FB pins) Oscillation Frequency : 300kHz (±15%) (180kHz, 500kHz custom) Maximum Duty Cycle : 100% Control Method: : PWM or PWM/PFM Selectable Output Current : More than 1000mA (VIN=5.0V, VOUT=3.3V) High Efficiency : 92% (TPY.) Stand-By Function : 3.0μA (MAX.) Soft-Start Time : 10 ms (internally set) Package : MSOP-10, USP-10 <XC9503B093A VOUT①: 3.3V, VOUT②: 1.8V > ■ TYPICAL PERFORMANCE CHARACTERISTICS ● Efficiency vs. Output Current ☆ GO-Compatible ETR0703_001 |
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