MAX631

PRODUCTION

CMOS Fixed/Adjustable Output Step-Up Switching Regulators Integrated Catch Diode Reduces Component Count

Analog Devices MAX631 Product Info

10 February 2026 7

Features

Fixed +SV, +12V, +15V Output Voltages
Adjustable Output with 2 Resistors
80% Typ Efficiency
Only 2 External Components
Charge Pump for Negative Output
135µA Typ Operating Current

Part details & applications

The MAX631, MAX632, and MAX633 are +5V, + 12V, and +15V fixed output, step-up DC-DC converters for use in low-power, high-efficiency switching regulator applica tions. The only external components required are an output filter capacitor and a low-cost inductor. Included on-chip are low battery detection circuitry and a charge pump output for generating a negative voltage in dual supply applications.

Though most simply used as fixed output regulators, the Ordering Information MAX631/632/633 can also be set for other output volt ages by adding an external voltage divider.

Maxim manufactures a broad line of step-up, step-down, and inverting DC-DC converters, with features such as logic-level shutdown, adjustable oscillator frequency, and external MOSFET drive.

APPLICATIONS

Minimum Component, High-Efficiency

DC-DC Converters

Portable Instruments

Rechargeable and Primary Battery Power Conversion

Uninterruptable On-Board Power Supplies

Card Level Multiple Power Conversion

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