MAX765CSA

Voltage Regulators - DC DC Switching Regulators Overview

The MAX765CSA is an inverting switching regulator from the MAX764/MAX765/MAX766 series, manufactured by Analog Devices Inc./Maxim Integrated. It delivers a fixed -12V output with a maximum output current of 120mA and operates within a 3V to 16V input voltage range. The device utilizes a pulse-frequency-modulated (PFM) control scheme with an internal P-channel power MOSFET, achieving high efficiency across wide load currents. Key electrical parameters include a 300kHz switching frequency, 120µA maximum supply current, and 5µA maximum shutdown current. It supports Dual Mode operation for adjustable outputs from -1V to -16V using external resistors.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Employs a unique current-limited pulse-frequency-modulated (PFM) control scheme that combines benefits of traditional PFM and PWM converters for high efficiency at both light and heavy loads.
• Integrates an internal P-channel power MOSFET to minimize external component count while maintaining high efficiency over a wide range of load currents.
• Supports Dual Mode operation, allowing the fixed -12V output to be adjusted from -1V to -16V using two external resistors.

Voltage Regulators - DC DC Switching Regulators Applications

• LCD-bias generators
• Portable instruments
• LAN adapters
• Remote data-acquisition systems
• Battery-powered applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'CSA' against official datasheets to confirm the SOIC-8 package and commercial temperature range. Confirm availability status as distribution channels may list limited stock or obsolete status. Ensure the required -12V fixed output aligns with system design needs, as adjustable variants exist within the same family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a negative voltage rail is required from a single positive supply source. The MAX765 provides a fixed -12V output, distinguishing it from the -5V (MAX764) and -15V (MAX766) variants. Consider the low quiescent current for battery-operated designs where power conservation is critical during standby modes.

Voltage Regulators - DC DC Switching Regulators Part Context

The MAX765 belongs to a family of highly efficient inverting switching regulators designed for portable and battery-powered applications. It shares architectural similarities with the MAX764 and MAX766, differing primarily in preset output voltages. The series is characterized by its ability to deliver up to 1.5W of power with minimal external components.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with newer Maxim Integrated PMIC families if obsolescence is a concern.