ICL7660 CMOS Voltage Converters

The Intersil ICL7660 and ICL7660A are monolithic CMOS power supply circuits which offer unique performance advantages over previously available devices. The ICL7660 performs supply voltage conversions from positive to negative for an input range of +1.5V to +10.0V resulting in complementary output voltages of -1.5V to -10.0V and the ICL7660A does the same conversions with an input range of +1.5V to +12.0V resulting in complementary output voltages of -1.5V to -12.0V. Only 2 noncritical external capacitors are needed for the charge pump and charge reservoir functions. The ICL7660 and ICL7660A can also be connected to function as voltage doublers and will generate output voltages up to +18.6V with a +10V input.

Contained on the chip are a series DC supply regulator, RC oscillator, voltage level translator, and four output power MOS switches. A unique logic element senses the most negative voltage in the device and ensures that the output NChannel switch source-substrate junctions are not forward biased. This assures latchup free operation.

The oscillator, when unloaded, oscillates at a nominal frequency of 10kHz for an input supply voltage of 5.0V. This frequency can be lowered by the addition of an external capacitor to the "OSC" terminal, or the oscillator may be overdriven by an external clock.

The "LV" terminal may be tied to GROUND to bypass the internal series regulator and improve low voltage (LV) operation. At medium to high voltages (+3.5V to +10.0V for the ICL7660 and +3.5V to +12.0V for the ICL7660A), the LV pin is left floating to prevent device latchup.

ICL7660 特点

Simple Conversion of +5V Logic Supply to ±5V Supplies
Simple Voltage Multiplication (VOUT = (-) nVIN)
Typical Open Circuit Voltage Conversion Efficiency 99.9%
Typical Power Efficiency 98%
Wide Operating Voltage Range
- ICL7660 1.5V to 10.0V
- ICL7660A 1.5V to 12.0V
ICL7660A 100% Tested at 3V
Easy to Use - Requires Only 2 External Non-Critical Passive Components
No External Diode Over Full Temp. and Voltage Range
Pb-Free Plus Anneal Available (RoHS Compliant)

ICL7660 应用

On Board Negative Supply for Dynamic RAMs
Localized uProcessor (8080 Type) Negative Supplies
Inexpensive Negative Supplies
Data Acquisition Systems

ICL7660 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ICL7660CBA	量产	民用级	8 Ld SOIC	1	0.56
ICL7660CBA-T	量产	民用级	8 Ld SOIC T+R	1	0.61
ICL7660CBAZ	量产	民用级	8 Ld SOIC	1	0.47
ICL7660CBAZ-T	量产	民用级	8 Ld SOIC T+R	1	0.51
ICL7660CBAZA	量产	民用级	8 Ld SOIC	1	0.47
ICL7660CBAZA-T	量产	民用级	8 Ld SOIC T+R	1	0.51
ICL7660CPA	量产	民用级	8 Ld PDIP	N/A	0.58
ICL7660CPAZ	量产	民用级	8 Ld PDIP	N/A	0.48