ILC6381AP-33

Voltage Regulators - DC DC Switching Regulators Overview

The Fairchild Semiconductor ILC6381AP-33 is a step-up DC-DC converter designed for single-cell lithium-ion battery applications. It operates from an input voltage range of 2.7V to 4.2V and provides a fixed 3.3V output. The device integrates synchronous rectification, eliminating the need for an external Schottky diode. It supports selectable PFM or PWM modes via the SEL pin to optimize efficiency across varying load currents. The oscillator frequency is internally set at 300kHz.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification to eliminate external diodes
• Provides true load disconnect from battery in shutdown mode
• Features selectable PFM or PWM operating modes
• Includes low battery detector with transient rejection

Voltage Regulators - DC DC Switching Regulators Applications

• Cellular phones and pagers
• Palmtops and PDAs
• Portable electronics powered by single-cell lithium-ion batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'AP-33' against official Fairchild or onsemi datasheets to confirm package type and temperature rating. Ensure compatibility with existing PCB footprints and thermal requirements. Confirm current availability status as legacy components may have limited supply chains.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for designs requiring high efficiency from single-cell lithium-ion sources. The fixed 3.3V output suits logic level translation. Consider the SEL pin configuration for noise-sensitive environments where PWM mode is preferred over PFM for lower ripple.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ILC638x series of boost converters. It serves as a direct replacement for the ILC6382 in applications where the SYNC pin functionality is not utilized. The series is optimized for wireless communications and portable devices requiring compact power solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The ILC6382 is documented as a compatible substitute when the SYNC pin is unused. Verify electrical parameter alignment before substitution.

Voltage Regulators - DC DC Switching Regulators FAQ

How is the operating mode selected?

The PFM or PWM mode is user-selectable by connecting the SEL pin to ground or leaving it open, respectively.

What is the function of the shutdown mode?

In shutdown mode, the device allows true load disconnect from the battery input, reducing battery drain.