The PS3120A 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 PS3120A ideally suited for small, battery-powered applications.  

       The PS3120A 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 PS3120A is available in the industry standard SOT-23-6L power packages.
PS3120A是不需要电感的锂电池升压IC，输出电压4.94V，输出电流最大可以做到230MA。比较适合用在小功率的电子产品中。

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

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