ADM8660: CMOS Switched-Capacitor Voltage Converter w/ Low Power Shutdown Pin

The ADM660/ADM8660 is a charge-pump voltage converter that can be used to either invert the input supply voltage giving VOUT = -VIN or double it (ADM660 only) giving VOUT = 2 x VIN. Input voltages ranging from +1.5 V to +7 V can be inverted into a negative -1.5 V to -7 V 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 up to 50 mA with greater than 90% efficiency are achievable, while 100 mA achieves greater than 80% efficiency.

A Frequency Control (FC) input pin is used to select either 25 kHz or 120 kHz charge-pump operation. This is used to optimize capacitor size and quiescent current. With 25 kHz selected, a 10 µF external capacitor is suitable, while with 120 kHz the capacitor may be reduced to 2.2 µF. The oscillator frequency on the ADM660 can also be controlled with an external capacitor connected to the OSC input or by driving this input with an external clock. In applications where a higher supply voltage is desired it is possible to use the ADM660 to double the input voltage. With input voltages from 2.5 V to 7 V, output voltages from 5 V to 14 V are achievable with up to 100 mA output current.The ADM8660 features a low power shutdown (SD) pin instead of the external oscillator (OSC) pin. This can be used to disable the device and reduce the quiescent current to 300 nA.

技术特性

ADM660: Inverts or Doubles Input Supply Voltage
ADM8660: Inverts Input Supply Voltage
100 mA Output Current
Shutdown Function (ADM8660)
2.2 µF or 10 µF Capacitors
0.3 V Drop at 30 mA Load
+1.5 V to +7 V Supply
Low Power CMOS: 600 µA Quiescent Current
Selectable Charge Pump Frequency (25 kHz/120 kHz)
Pin Compatible Upgrade for MAX660, MAX665, ICL7660
Available in 16-Lead TSSOP Package

技术指标

Input Voltage (V): 1.5 - 7
Vout Preset (V): -Vin
Iout : 100mA
Vout #2 (V): n/a
Iout #2 (µA): n/a
Vout #3 (V): n/
Iout #3 (µA): n/a
Power Efficiency (%): 80%
Supply Current : 4.5mA
Shutdown Current, max: 5µA
Package: PDIP-8,SOIC-8

订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
ADM8660ANZ 产品状态: 量产	8 ld PDIP	8	商业	Tube, 50	$ 2.02	$ 1.92	Y 材料信息
ADM8660ARZ 产品状态: 量产	8 ld SOIC	8	商业	Tube, 98	$ 2.02	$ 1.92	Y 材料信息

ADM8660 应用技术支持与电子电路设计开发资源下载

ADM8660 数据手册DataSheet 下载 . pdf(Rev C, 04/2011 pdf 282kB)
ADI 模拟器件公司比较器产品选型指南 . pdf
Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf