MAX852ISA

Overview

The MAX852ISA is a low-noise, regulated negative charge-pump power supply designed for GaAsFET bias applications. It accepts an input voltage range of 4.5V to 10V and provides a fixed regulated output of -4.1V. The device delivers an output current of 5mA with a switching frequency of 100kHz. It features a logic-level shutdown mode with maximum shutdown current of 1µA over temperature. The unit operates within a commercial temperature range of 0°C to +70°C and is housed in an 8-SOIC package.

Feature Summary

• Provides a fixed regulated negative output voltage suitable for specialized analog circuit biasing
• Integrates an internal linear regulator to minimize output voltage ripple
• Includes a logic-level shutdown capability for significant power reduction

Applications

• GaAsFET bias power supplies
• Low-noise negative voltage generation for analog circuits
• Battery-powered systems requiring efficient negative rail conversion

Procurement Notes

Verify the specific suffix 'ISA' confirms the 0°C to +70°C commercial operating temperature range. Confirm the 8-SOIC package dimensions match your PCB footprint requirements. Ensure the fixed -4.1V output aligns with your system design needs, as adjustable variants exist within the family. Check RoHS compliance status for your region's regulatory standards.

Selection Notes

Select this component when a stable, low-noise negative voltage is required from a single positive supply. The fixed -4.1V output eliminates external resistor networks needed for adjustable regulators. Consider the 5mA current limit for load requirements. The 100kHz switching frequency allows for smaller external capacitors compared to lower-frequency alternatives.

Part Context

The MAX852ISA belongs to the MAX850–MAX853 series of low-noise, regulated negative charge-pump power supplies. These devices are optimized for powering GaAsFETs and other analog components requiring clean negative rails. The series shares common architecture but differs in output voltage options and temperature ranges.

Replacement Considerations

The MAX853ISA offers an adjustable output range (-0.5V to -9V) instead of a fixed voltage. The MAX851ISA provides similar functionality but may differ in specific electrical characteristics or packaging options. Verify pin compatibility and thermal performance before substitution.