ICL7660MTV/883B

Voltage Regulators - DC DC Switching Regulators Overview

The ICL7660MTV/883B is a monolithic CMOS power circuit manufactured by Rochester Electronics, LLC, serving as a military-grade variant of the Intersil ICL7660. It functions as a small-power polarity reversal converter, transforming positive input voltages into complementary negative outputs. The device operates within an input range of +1.5V to +10.0V, producing corresponding negative output voltages from -1.5V to -10.0V. Key electrical parameters include a typical quiescent current of 170μA and a switching frequency of 10 kHz. It utilizes a TO-99-8 package and supports external clock driving or frequency reduction via an OSC pin capacitor.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Monolithic CMOS construction ensures latch-free operation through integrated logic that prevents forward biasing of N-channel switch source-substrate junctions.
• Requires only two non-critical external capacitors for charge pump and storage functions, eliminating the need for external diodes across temperature and voltage ranges.
• LV terminal allows bypassing the internal series regulator for improved low-voltage performance when grounded, while remaining floating at higher voltages to prevent latch-up.
• Oscillator can be overdriven by an external clock or have its frequency reduced by adding a capacitor to the OSC terminal.

Voltage Regulators - DC DC Switching Regulators Applications

• Providing onboard negative power supplies for dynamic RAM
• Generating negative power rails for centralized microprocessors such as the 8080 type
• Creating dual polarity power sources (+/- 5V) from single +5V logic supplies in data acquisition systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix /883B indicates compliance with MIL-PRF-38535 or similar military quality standards. Confirm lot traceability and screening requirements if intended for defense applications. Ensure the TO-99-8 ceramic package matches the thermal and mechanical constraints of the target assembly. Cross-reference with original Intersil datasheets for pinout compatibility.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when high reliability and radiation hardness are required compared to commercial variants. Consider the 10 kHz switching frequency for noise-sensitive designs. Evaluate the 170μA typical static current against system power budgets. Verify that the 1.5V to 10V input range aligns with the available supply voltage.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ICL7660 family of switched-capacitor voltage converters. It shares functional equivalence with the TC7662ACPA and MAX1044. The /883B designation typically denotes a screened version suitable for harsh environments, differing from standard commercial SOIC or DIP packages found in other ICL7660 variants.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct replacements include the Intersil ICL7660 and Maxim Integrated MAX1044. For equivalent functionality in different packages, consider the TC7662ACPA. Verify that substitute parts meet the same military qualification standards if the /883B specification is mandatory.

Voltage Regulators - DC DC Switching Regulators FAQ

How does the LV pin affect operation?

The LV pin should be grounded when the input voltage is below 3.5V to bypass the internal series regulator. When the input voltage is above 5V, the LV pin must remain floating to prevent device latch-up.

What is the maximum output voltage capability?

With a +10V input, the ICL7660 generates a -10V output. In voltage multiplier mode, it can produce up to +18.6V from a +10V input.