A7501

AiT Semiconductor Inc. www.ait-ic.com A7501 DC-DC CONVERTER/BOOST(STEP-UP) SUPER-SMALL PACKAGE VFM CONTROL STEP-UPSWITCHING REGULATOR DESCRIPTION FEATURES The A7501 Series is a CMOS VFM-control step-up  Low voltage operation: Start up at 0.9V min switching regulator that mainly consists of a reference (IOUT=1mA) guaranteed voltage source, an oscillator, and a comparator.  Low input current: During maximum operation: Enabling products with a low ripple over a wide range, high efficiency, and high output current.  18μA (VOUT=3.3V, typ.) Duty ratio: 77% Built-in fixed-type PFM Products with a fixed duty ratio of 75 %（Lower Output controller Voltage）or 88%(Higher Output Voltage) are also  External parts: Coil, capacitor, and diode available. With the A7501 Series, a step-up switching  Output voltage: Settable to between regulator can be configured by using an external coil, 2.5V to 5.5V , accuracy of 2% capacitor, and diode. A protection circuit turns off the built-in MOSFET when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the A7501 Series ideal for applications such as the power supply unit of portable equipment.  Available in SOT-89-3 and SOT-23 Packages APPLICATION  Power supply for portable equipment such as digital cameras, electronic notebooks, and PDA  Power supply for audio equipment such as portable CD/MD players  Constant voltage po...