ICL7660CUA Analog Devices Integrated Circuit (Small Outline Packages) In Stock
ICL7660CUA is a switched-capacitor voltage converter that inverts or doubles an input supply voltage from 1.5 V to 10 V with no inductors required. It delivers output currents up to 20 mA with only two external capacitors, operating across a wide temperature range. Available from Analog Devices in a small outline package with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- ICL7660CUA Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Inductor-free voltage inversion using only 2 external capacitors generates a negative rail from a positive supply, simplifying bipolar-supply PCB designs
- Wide input range from 1.5 V to 10 V covers single-cell battery, USB 5 V, and regulated 3.3 V rails without design changes
- Up to 20 mA output current supports dual-supply op-amp circuits, LCD bias generators, and low-power analog front ends
- Switched-capacitor architecture achieves high conversion efficiency at light loads, extending battery life in portable instrumentation
Applications
ICL7660CUA is widely used to generate a negative supply rail for dual-supply op-amp circuits in portable instruments and handheld test equipment that operate from a single positive battery. It also provides the negative bias voltage needed for LCD contrast adjustment in embedded systems and industrial panel displays without a bulky inductor-based inverter. In addition, the device serves as a voltage doubler in low-power RF or sensor circuits where a higher rail derived from a 3.3 V or 5 V source is required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does ICL7660CUA generate a negative supply rail for a dual-supply op-amp circuit from a single 5 V source?
ICL7660CUA uses internal charge-pump switches and two external capacitors (typically 10 µF each) to invert the 1.5 V to 10 V positive input, producing a -5 V output when powered from a 5 V rail. The resulting negative rail supplies the V- pin of dual-supply op-amps, enabling rail-to-rail signal swing without a second battery or an inductor-based inverting converter. Output current reaches up to 20 mA, which is sufficient for most single- or dual-op-amp stages.
What external components does ICL7660CUA require, and how does that compare to an inductor-based negative converter?
ICL7660CUA needs only 2 capacitors — typically two 10 µF electrolytic or ceramic caps for the charge-pump reservoir and output filter — versus an inductor-based SEPIC or inverting buck-boost that requires an inductor (100 µH or larger), an additional diode, and 3 to 4 capacitors. This reduces external component count by at least 3 parts and eliminates the EMI generated by switching inductors, making ICL7660CUA ideal for noise-sensitive analog circuits.
Can ICL7660CUA operate from a single-cell lithium battery and power an LCD bias circuit?
Yes. A fully charged 1-cell Li-ion battery provides 3.7 V to 4.2 V, well within ICL7660CUA's 1.5 V to 10 V input range. The inverted output of -3.7 V to -4.2 V provides the negative contrast bias needed for many STN and TN LCD panels that require a bias voltage between -2 V and -5 V. At the typical LCD bias current of 1 to 5 mA, the device operates efficiently, drawing less than 100 µA quiescent current to preserve battery runtime in handheld displays.
How does ICL7660CUA perform as a voltage doubler and what input voltage limits must be observed?
When the OSC pin is left open and the input and output capacitors are connected in the voltage-doubling configuration, ICL7660CUA delivers an output of approximately 2× Vin, such as 10 V from a 5 V input. The absolute maximum input is 10 V, so the doubled output must not exceed 20 V total supply stress on subsequent circuits. At 5 V input in doubling mode, output current capability drops to roughly 10 mA, which suits low-current EEPROM programming, piezo buzzer drives, or gate-bias supplies in portable equipment.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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