MAX8640ZEXT15+T

Voltage Regulators - DC DC Switching Regulators Overview

The MAX8640ZEXT15+T is a synchronous step-down DC/DC converter manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.5 V. The device supports an output current of 500 mA with a switching frequency of 3.9 MHz. It features a low quiescent current of 10 nA in shutdown mode and a typical static current of 28 uA during operation. The component is housed in a compact SC-70-6 package and functions as a buck regulator suitable for space-constrained applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous step-down topology for high efficiency
• Ultra-low power consumption with shutdown capability
• Compact surface-mount packaging

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered electronics
• Cellular phones and mobile devices
• Personal digital assistants (PDAs)

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix EXT15 to confirm the fixed 1.5V output configuration, as other suffixes may indicate different voltages or frequencies. Ensure compatibility with the SC-70-6 footprint during PCB layout. Confirm RoHS compliance status through official manufacturer documentation prior to integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5V rail is required from a single-cell lithium-ion source. The 3.9 MHz switching frequency allows for smaller external inductors compared to lower-frequency alternatives. Evaluate thermal performance based on the small SC-70-6 package size and expected load currents.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the MAX8640 series of tiny, synchronous step-down converters. The series is designed for portable applications requiring efficient power management from single-cell batteries. The ZEXT15 suffix denotes the specific temperature grade, package type, and fixed output voltage setting.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Cross-reference with MAX8640YEXT25+T for similar form factor but different output voltage. Verify pinout compatibility before substituting with other MAX8640 variants.