PAM3101AAA475

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The PAM3101AAA475 is a positive voltage linear regulator manufactured by Diodes Incorporated. It provides a fixed output voltage of 4.75V with a maximum continuous load current of 300mA. The device operates within an input supply voltage range of 2.5V to 5.5V and features a typical dropout voltage of 180mV at full load. It incorporates a low quiescent current of 65µA and high power supply ripple rejection of 70dB at 1kHz. The component utilizes a compact SOT-23-3 surface-mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Utilizes a P-channel MOSFET pass transistor to achieve low ground current consumption across varying load conditions.
• Integrates comprehensive protection mechanisms including thermal shutdown, current limiting, and short circuit protection.
• Features a fast discharge function that ensures the output discharges rapidly when the enable pin is deactivated.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Cellular Phones
• Bluetooth Earphones
• Digital Cameras
• Portable Electronics
• WLANs

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the exact pin configuration and output voltage rating. Confirm compliance with RoHS standards and ensure the package type matches the intended PCB footprint. Check for any discontinuation notices or recommended design replacements prior to finalizing procurement plans.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for battery-powered applications requiring stable voltage regulation with minimal power loss. Ensure the input voltage remains within the specified operating range while accounting for the dropout voltage under maximum load. Verify that the external capacitor selection meets stability requirements for the chosen package type.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the PAM3101 series of low-dropout CMOS linear regulators designed for portable electronics. The series offers various fixed output voltages and multiple space-saving package options to accommodate different design constraints. It is engineered to provide high performance in noise-sensitive environments through superior ripple rejection capabilities.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The datasheet explicitly recommends using AP2125 or AP2127 as alternatives for new designs due to the PAM3101 being marked as not recommended for new design.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the minimum required output capacitance for stable operation?

The PAM3101 requires an output ceramic capacitor with a value greater than 2.2µF and an equivalent series resistance (ESR) greater than 5mΩ to ensure stability.

How does the bypass pin affect performance?

Connecting a 10nF capacitor from the BYP pin to ground forms a low-pass filter with an internal resistor to suppress output noise, though increasing capacitance may slightly increase start-up time.