PAM2805AF

Overview

The PAM2805AF is a high-efficiency step-up DC-DC converter designed for driving white LEDs in portable applications. It delivers an output current of up to 750mA, adjustable via an external resistor. The device operates with an input voltage range of 2.3V to 5.5V and switches at a constant frequency of 1.0MHz. This switching frequency enables the use of small passive components, optimizing board space. The IC integrates internal power MOSFETs and supports various LED configurations.

Feature Summary

• Integrates a 1.0MHz fixed-frequency switching controller for compact passive component selection
• Provides adjustable output current capability up to 750mA through external resistance setting
• Features integrated power MOSFETs to minimize external component count and footprint

Applications

• White LED backlighting for mobile phones
• LED illumination for personal digital assistants (PDAs)
• Portable media players requiring efficient step-up conversion

Procurement Notes

Verify the specific suffix 'AF' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with required operating temperatures and input voltage ranges for the target application design before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring a compact solution for driving multiple white LEDs from a single-cell lithium battery or similar low-voltage source. The 1.0MHz operation allows for smaller inductors compared to lower-frequency alternatives, making it suitable for space-constrained handheld devices.

Part Context

This part belongs to the PAM28xx series of LED drivers manufactured by Diodes Incorporated. These devices are engineered specifically for portable electronics where efficiency and size are critical constraints. The series typically includes variants with different current ratings and packaging options to suit diverse form factors.

Replacement Considerations

Consult official substitution lists for pin-compatible alternatives within the same family. Verify that any substitute maintains the 750mA current capability and 1.0MHz switching frequency to ensure identical performance in existing designs.