ADM660: CMOS Switched-Capacitor Voltage Converter

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 uF external capacitor is suitable, while with 120 kHz the capacitor may be reduced to 2.2 uF. 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.

ADM660 特点

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

ADM660 功能框图

ADM660 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
ADM660AN	量产	8 ld PDIP	8	工业
ADM660ANZ	量产	8 ld PDIP	8	工业
ADM660AR	量产	8 ld SOIC	8	工业
ADM660AR-REEL	量产	8 ld SOIC	8	工业
ADM660ARU	量产	16 ld TSSOP	16	工业
ADM660ARU-REEL	量产	16 ld TSSOP	16	工业
ADM660ARU-REEL7	量产	16 ld TSSOP	16	工业
ADM660ARUZ	量产	16 ld TSSOP	16	工业
ADM660ARUZ-REEL	量产	16 ld TSSOP	16	工业
ADM660ARUZ-REEL7	量产	16 ld TSSOP	16	工业
ADM660ARZ	量产	8 ld SOIC	8	工业
ADM660ARZ-REEL	量产	8 ld SOIC	8	工业

ADM660 应用技术支持与电子电路设计开发资源下载

1. ADM660 数据手册DataSheet 下载 . PDF
2. ADI 模拟器件公司比较器产品选型指南 . PDF
3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .PDF