AP2151DFMG-7

Overview

The AP2151DFMG-7 is a single-channel high-side power switch IC from Diodes Incorporated, designed for USB power distribution. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an output current of 500 mA with a current limit of 800 mA. The device features a maximum on-resistance of 110 mOhms, ensuring efficient power delivery. Key timing parameters include a rise time of 50 us and a fall time of 50 us. It is housed in a UDFN-6 surface-mount package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated current limiting and thermal protection for short circuit safety
• Controlled rise time to minimize inrush current during activation
• Undervoltage lockout functionality for stable operation under low voltage conditions
• Open-drain flag output with deglitch capability for accurate fault reporting

Applications

• USB 2.0 port power switching and distribution
• Hot-swap applications requiring controlled power sequencing
• Peripheral device power management in consumer electronics
• Battery-powered systems needing efficient high-side switching

Procurement Notes

Verify the specific suffix 'DFMG-7' against the manufacturer's official datasheet to confirm the UDFN-6 package type and tape-and-reel orientation. Ensure that the ordering documentation explicitly references the AP2151 series specifications, particularly the 500 mA output current and 110 mOhm on-resistance values. Cross-reference the component marking code with the approved package outline to prevent substitution errors with similar variants in the same family.

Selection Notes

Select this component when a single-channel solution with precise current limiting is required for USB compliance. The UDFN-6 package offers a compact footprint suitable for space-constrained designs. Consider the 500 mA continuous output capability and 800 mA limit for load requirements. The integrated thermal and over-current protection simplifies design by reducing the need for external sensing components, making it ideal for direct integration into host controller interfaces.

Part Context

This part belongs to the AP2151 series of power switches optimized for Universal Serial Bus applications. The series includes variants with different packages such as MSOP-8EP and SOT-25-5, but the DFMG-7 suffix specifically denotes the UDFN-6 configuration. These devices are engineered to meet USB 2.0 standards, providing essential protection features like undervoltage lockout and controlled rise times within a small form factor.

Replacement Considerations

AP2151AW-7 (SOT-25-5 package)

FAQ

Does the AP2151DFMG-7 support hot-swap operations?

Yes, the device is optimized for hot-swap applications due to its controlled rise time and integrated current limiting features.

What is the purpose of the Flag output pin?

The open-drain Flag output indicates over-current or thermal shutdown events. It includes a 7ms deglitch capability to prevent false reporting without external components.