Key points for charge pump selection

As a design engineer, when choosing a charge pump, you must consider the following factors:

High conversion efficiency

· No adjustment capacitor charge pump 90%

Adjustable capacitor charge pump 85%

Switching regulator 83%

The static current should be small, which can save more power;

The input voltage should be low to make full use of the battery potential;

The noise should be low and not interfere with the overall circuit of the mobile phone;

The functional integration should be high, improving the efficiency of unit area and making the mobile phone design more compact;

Sufficient output adjustment capability, the charge pump will not get hot due to working at full load;

Small package size is a common requirement for handheld products;

Low installation cost , including small PCB area occupied by peripheral circuits and few and simple wiring;

· With shutdown control terminal, the charge pump can be shut down in long-term standby state, making the power supply current consumption almost zero.