MAX853ESA

Overview

The MAX853ESA is a low-noise, regulated negative charge-pump power supply designed for GaAsFET bias applications. It operates from a 4.5V to 10V input voltage range and delivers a fixed -4.1V output or an adjustable output ranging 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 supports operation within a temperature range of 0°C to +70°C.

Feature Summary

• Provides low-noise regulated negative voltage generation suitable for sensitive analog circuits
• Offers flexible output configuration with fixed -4.1V or adjustable -0.5V to -9V ranges
• Integrates a logic-level shutdown mode for minimal power consumption during inactive states

Applications

• GaAsFET bias power supplies
• Low-noise negative voltage generation for analog signal processing
• Portable electronic devices requiring efficient step-down inversion

Procurement Notes

Verify the specific suffix 'ESA' against official Analog Devices documentation to confirm the exact temperature grade and packaging variant. Ensure compatibility with the required operating temperature range and pinout specifications before integration. Cross-reference the manufacturer's latest datasheet to confirm availability status and any potential obsolescence notices associated with this specific part number.

Selection Notes

Select the MAX853ESA when a regulated negative voltage is required with strict noise limitations. The fixed -4.1V option simplifies design for standard GaAsFET applications, while the adjustable range accommodates custom bias requirements. Consider the 100kHz switching frequency for EMI management and ensure the 5mA output current meets the target circuit's load demands without exceeding thermal limits in the SOIC-8 package.

Part Context

The MAX853 belongs to a family of switched-capacitor regulators from Maxim Integrated, optimized for generating negative voltages from positive single-supply sources. This series is characterized by its ability to provide stable regulation with minimal external components, making it distinct from inductive DC-DC converters. The MAX853ESA specifically denotes the industrial/commercial grade variant in the standard SOIC-8 footprint, aligning with other models like the MAX850 and MAX852 in the same functional lineage.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.