ADM660ARZ-REEL7

ADM660 is a charge-pump voltage converter. Input voltages ranging from +1.5V to +7V can be inverted into a negative -1.5V to -7V output supply. This inverting scheme is ideal for generating a negative rail in single power supply systems. Only two small external capacitors are needed for the charge pump. Output currents upto 50mA with greater than 90% efficiency are achievable, while 100mA achieves greater than 80% efficiency. A frequency control (FC) input pin is used to select either 25KHz or 120KHz charge-pump operation. This is used to optimize capacitor size and quiescent current. With 25KHz selected, a 10µF external capacitor is suitable, while with 120KHz the capacitor may be reduced to 2.2µF. The oscillator frequency on the device can also be controlled with an external capacitor connected to the OSC input or by driving this input with an external clock. It is used in application such as handheld instruments, portable computers, remote data acquisition, op-amp power supplies.

• Inverts or doubles input supply voltage
• 0.3V drop at 30mA load
• Supply current is 0.6mA typ at ((V+ = +5V, C1, C2 = 10F)
• Output resistance is 9 ohm typ at (IL = 100mA)
• Power efficiency is 94% typical at ( RL = 1KW connected from V+ to OUT)
• Voltage conversion efficiency is 99.96% typical at (No load, V+ = +5V, C1, C2 = 10)
• Operating temperature is -40°C to +85°C
• Package style is 8-lead standard small outline [SOIC-N]

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party