ICL7660SIPA

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The ICL7660SIPA is a versatile DC power converter integrated circuit by Intersil Corporation, and is a popular choice for many voltage regulator tasks. It is a bipolar charge pump-type voltage converter and is particularly useful for providing negative voltages, as well as DC-to-DC conversion. With efficient operation, small size and low cost, the ICL7660 can be effectively used in a variety of microprocessor-based applications. In this article, we will take a closer look at the ICL7660SIPA application field and working principle and discuss how it is classified as a PMIC (Power Management Integrated Circuit) with Voltage Regulators, specifically, DC DC Switching Regulators.

The ICL7660SIPA is an integrated switchmode charge pump voltage converter that comes in a space-saving 8-pin PDIP (Plastic Description In-line Package). It uses just two external capacitors and a power supply to generate output voltages as low as -4.4V or higher voltage conversions without the need for an external transformer. This makes the ICL7660 an ideal solution for embedded systems that are constrained by size. Because of the low operating voltage and low quiescent current, it is virtually noiseless and can be used to power low-noise subsystems. It also has dual-level logic inputs that allow control of the output with logic signals.

The ICL7660 operates with an input voltage between 1.8V and 6V. It can take up to 20mA of output current, which is enough to drive small loads, but can also be scaled up with transistors to drive larger loads. The ICL7660 has two outputs, labelled VOUT and V-(minus). It can generate either a positive or negative output, with a range of -4.4V to +5.5V. The IC can deliver up to 20mA at VOUT, and up to 2mA at V-. It also has a number of key features to ensure it provides robust performance, including low power consumption, current limiting, thermal shutdown, short-circuit protection and more.

The power conversion process of the ICL7660 is simple and easy to understand. It begins by taking an input voltage and then charge pumping it up to the desired output voltage. The device uses a dual pump design, meaning that it starts by pumping small charges up to the output, and then larger amounts when the voltage reaches a certain level. This strategy ensures that the output voltage is stable and can be accurately regulated. The device also features an oscillator that switches between pump-up and pump-down modes. This ensures that the output voltage is regulated in spite of the input voltage variations.

The versatility and low cost of the ICL7660 make it a desirable choice for many voltage regulator tasks. Despite its small size and limited current output, it is a solid solution for a variety of microprocessor-based applications, such as unregulated battery applications. Furthermore, its low power consumption, current limiting feature and several other safety features make it reliable and well suited for many system designs.

In conclusion, the ICL7660SIPA is an attractive voltage converter with many of the features desired in a microprocessor-based application. It can generate a wide range of output voltages, both positive and negative, and is a cost-effective solution. For these reasons and more, it is classified as a PMIC (Power Management Integrated Circuit) with Voltage Regulators, specifically, DC DC Switching Regulators.

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