AiT Semiconductor has introduced the A7501 Series of VFM Step-Up DC-DC Converter ICs with ultra-low supply current. These converters are manufactured using the CMOS process and are suitable for use with battery-powered instruments. The A7501 IC consists of an oscillator, a VFM control circuit, a driver transistor (LX switch), a reference voltage unit, an error amplifier, resistors for voltage detection, and a LX switch protection circuit.
A low ripple and high-efficiency step-up DC-DC converter can be constructed of this A7501 IC with only three external components. 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. A7501 has a fixed duty ratio of 75 % (Lower Output Voltage) or 88% (Higher Output Voltage).
Key features of A7501 DC-DC Converter IC Family
- Minimal Number of External Components, Only an Inductor (AiT-WSS0703-220M), a Diode (AiT SM140A), and a Capacitor.
- Ultra Low Input Current: 6.5 μA at no load
- 1.8 V to 5.0 V Output Voltage
- ±2% High Output Voltage Accuracy
- Low Ripple and Low Noise
- Low Start-Up Voltage, 0.9 V at 1 mA
- Duty ratio: 77% Built-in fixed-type PFM controller
- Available in SOT-23, SOT-25 and SOT89-3 packages
Key applications
- Power Source for Battery-Powered Equipment
- Power Source for Camera, Camcorder, VCT, PDA, Pager, Electronic Data Bank, Hand-Held Communication Equipment and Audio Equipment.
- Power Source for Applications that require higher voltage than that of batteries used in the appliances.
Click here to learn more about A7501E3R-27
