HX4004A

HX4H0X01400A1 Low Noise, Regulated Charge Pump DC/DC Converter Features  Fixed 4.94V±3% Output  VIN Range: 2.7V to 4.5V  Output Current: Up to 110mA (VIN≥3V) Up to 230mA (VIN≥3.6V)  Low Noise Constant Frequency (360kHz) Operation  Shutdown Current <1μA  No Inductors  Available in Low Profile 6-Lead SOT23 Package Applications  White LED Backlighting  Li-Ion Battery Backup Supplies  Smart Card Readers  PCMCIA Local 5V Supplies Description The HX4004A is a low noise switched capacitor voltage doubler. It produces a regulated output voltage from a 2.7V to 4.5V input. Low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) make the HX4004A ideally suited for small, battery-powered applications. The HX4004A have thermal shutdown capability and can survive a continuous short circuit from VOUT to GND. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to <1μA. The HX4004A i...