Features
- 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)
Description
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 N-channel 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.
Parameters
| Attributes | Value |
|---|---|
| Input Voltage (Min) (V) | 1.5 |
| Input Voltage (Max) (V) | 10 |
| Output Voltage (Min) (V) | -1.5 |
| Output Voltage (Max) (V) | -10 |
| IOUT (Max) (mA) | 20 |
| IS (Typical) | 170 |
| IS (mA) | 0.5 |
| Switching Frequency Range (Typical) (kHz) | 10 - 10 |
| Qualification Level | Standard |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SOICN | 4.9 x 3.9 x 0.00 | 8 | 1.3 |
Applications
- On Board Negative Supply for Dynamic RAMs
- Localized µProcessor (8080 Type) Negative Supplies
- Inexpensive Negative Supplies
- Data Acquisition Systems
Support Communities
-
About Typical Performance Curvess of the ICL7660S
Hello, Please tell me about the typical performance curves of the ICL7660S. Regarding the boost pin of the ISL7660S, is there a graph showing an example of the boost pin voltage vs. oscillation frequency characteristics? In addition, regarding the boost pin of the ISL7660S, are there any graphs showing examples ...
Feb 17, 2025 -
The difference between ICL7660S and ICL7660A.
... ICL7660A has an additional 3V electrical characteristic. Regarding electrical characteristics, other than the addition of the 3V standard,if there are any differences between the ICL7660S and the ICL7660A,please let me know. ■Reason for selling the ICL7660SSince the 5V characteristics are the same, I don't really understand why ...
Feb 10, 2025
Knowledge Base
-
Can I replace TC7660SEOA with the ICL7660AIBA?
Question: I would like to replace a TC7660SEOA with the ICL7660AIBAZA. The two components are pin for pin compatible except for pin 1. It is tied to 5V on the PCB. Pin 1 is listed as a no connect on the data sheet. Would there be an issue if it ...
Support Communities
