AiT Semiconductor introduces high-efficiency multi-function DC-DC Boost converter, the A7531 series. A7531 series are CMOS-based PFM step-up DC-DC Controller with low supply current and high output voltage accuracy. The quiescent current drawn from the power source is as low as 6 μA. It is capable of delivering 500 mA output current at 4.0 V output with 2 V input voltage. Only four external components are necessary: An inductor, a Schottky diode, an output filter capacitor, and an NMOSFET or an NPN transistor. All of these features make the A7531 series suitable for portable devices, which are supplied by single battery to four-cell batteries.
A7531 has a drive pin (EXT) for the external transistor. So it is possible to load a large output current with a power transistor that has a low voltage dropout.
A7531 integrates stable reference circuits and trimming technology, so it can afford high precision and low temperature-drift coefficient of the output voltage.
A7531 can be switched on or off easily by EN pin, to minimize the standby supply current.
The A7531 is available in the SOT-25 package.
Key features
- Deliver 500 mA at 4.0 V output voltage with 2 V input Voltage
- The controller output voltage can be adjusted from 2.5 V~6.0 V(In the 0.1 V step)
- Output voltage accuracy ±2%
- Low temperature-drift coefficient of the output voltage ±100ppm/°C
- Only four external components are necessary: An inductor, a Schottky diode, an output filter capacitor, and an NMOSFET or an NPN transistor
- High power conversion efficiency of 90%
- Low quiescent current is drawn from the power source 6 μA
- Available in SOT-25 package
Key applications
- Power source for PDA, DSC, MP3 Player, electronic toy, and wireless mouse
- Power source for single or dual-cell battery-powered equipment
- Power source for LED
Click here to learn more about A7531 Series
