MAX853CSA+

Overview

The MAX853CSA+ is a low-noise, regulated negative charge-pump power supply manufactured by Analog Devices Inc./Maxim Integrated. It operates with an input voltage range of 4.5V to 10V and provides a fixed -4.1V output or an adjustable output from -0.5V to -9V at up to 5mA load current. The device features a 100kHz switching frequency and achieves typical output ripple of less than 1mVp-p. It includes a logic-level shutdown mode with maximum current consumption of 1µA over temperature. The component is housed in an 8-pin SOIC package and is rated for commercial operating temperatures from 0°C to +70°C.

Feature Summary

• Provides low-noise, regulated negative voltage generation suitable for sensitive analog circuits
• Features a logic-level shutdown mode that minimizes current consumption during inactive periods
• Delivers stable output performance with minimal ripple across the specified load range

Applications

• GaAsFET bias power supplies
• Low-noise analog circuit power conditioning
• Portable equipment requiring efficient negative voltage conversion

Procurement Notes

Verify the specific suffix 'CSA+' against official Analog Devices documentation to confirm the commercial temperature grade and lead-free status. Confirm availability through authorized distributors as stock levels fluctuate. Ensure the ordering part number matches the required package type and thermal rating before finalizing procurement orders.

Selection Notes

Select this component when a regulated negative voltage is required from a single positive supply rail. It is appropriate for designs needing low output ripple and high efficiency without external inductors. Consider the 5mA output limit and input voltage range to ensure compatibility with the system power architecture.

Part Context

This part belongs to the MAX850–MAX853 family of negative charge-pump regulators designed for low-noise applications. These devices are commonly used in communication systems and instrumentation where clean power rails are critical for signal integrity.

Replacement Considerations

Check for MAX853ISA+ for extended temperature range variants. Verify pinout and electrical specifications against datasheets before substituting.