MAX759EWE

Voltage Regulators - DC DC Switching Regulators Overview

The MAX759EWE+ is a monolithic DC-DC converter manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-pin SOIC package. It operates as an inverting, current-mode PWM switching regulator designed to generate negative output voltages from positive input sources. The device provides a fixed -5V output with a maximum continuous output current of 300 mA. It functions within an input voltage range of 2.7V to 18V and maintains operation across an industrial temperature range of -40°C to +85°C. The internal oscillator switches at a frequency of 164 kHz, enabling the use of compact external components while delivering efficient power conversion for space-constrained applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-efficiency N-channel power switch and control circuitry into a single monolithic IC
• Employs current-mode PWM architecture for rapid transient response and inherent cycle-by-cycle current limiting
• Features a fixed-frequency oscillator that allows for precise timing and minimal external component count
• Includes thermal shutdown protection to safeguard the device during overload or excessive junction temperature conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Portable instrumentation requiring dual polarity power supplies
• Battery-powered systems needing negative rail generation
• Industrial control modules utilizing RS-232 or similar interface standards
• Telecommunications equipment requiring isolated or inverted logic levels

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation when ordering, as variations may exist regarding temperature grades or packaging formats. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected variant matches the required operating temperature range for the intended environment. Cross-reference the full part number with authorized distributors to confirm availability and authenticity. Review the latest datasheet for any updates to pin configurations or electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a stable negative voltage rail is required from a standard positive supply source. The fixed -5V output simplifies design compared to adjustable regulators, reducing external resistor requirements. Consider the 300 mA current limit to ensure it meets the load demands of the target circuit. The SOIC-16 package offers a balance between thermal performance and board space efficiency. Evaluate the 164 kHz switching frequency against EMI constraints and inductor size requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

The MAX759 belongs to the Maxim Integrated family of high-efficiency DC-DC converters. It is specifically engineered for inverting topologies, distinguishing it from step-down or boost variants within the same product line. This series targets applications where space savings and high efficiency are critical. The device represents a mature solution for generating negative voltages in portable and industrial electronics, offering reliability through integrated protection features.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the MAX759 family, such as different temperature grades (e.g., C vs E suffixes). Verify if newer generations offer improved efficiency or lower quiescent current. Ensure any substitute maintains the same inverting topology and output voltage specification. Confirm package compatibility to avoid PCB redesign efforts.