LP2985SF5-3.3

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

The LP2985SF5-3.3 is a micropower low-dropout linear voltage regulator manufactured by TAEJIN, providing a fixed 3.3V output with a guaranteed continuous current capability of 150mA. It features ultra-low noise performance and high accuracy within ±1.0%. The device operates with an input voltage range from 2.0V to 16V and includes logic-controlled shutdown functionality via the EN pin. Designed for stability with low ESR MLCC capacitors, it incorporates over-current and over-temperature protection mechanisms.

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

• Ultra-low noise output designed for sensitive analog circuits
• Logic-controlled enable/shutdown option for power management
• Integrated over-current and over-temperature protection
• Stable operation with low ESR MLCC output capacitors

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

• Mobile phones and smart phones
• Portable communication devices
• Battery-powered devices
• GPS, PDAs and handhelds
• SMPS post-regulator/DC to DC modules

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

Verify that the component matches the specific TAEJIN manufacturer designation rather than generic TI equivalents. Confirm the package type is SOT-23-5L as specified in the ordering information. Ensure the datasheet version aligns with the required electrical characteristics for your design. Check for any specific handling or storage requirements mentioned in the revision notice.

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

Select this regulator when a fixed 3.3V supply is required with minimal noise impact on downstream components. Consider the thermal dissipation limits if operating near the maximum 150mA current or high input voltages. The inclusion of an enable pin makes it suitable for systems requiring controlled power sequencing or deep sleep modes.

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

This component belongs to the LP2985 series of low-noise LDO regulators. While similar parts exist from other manufacturers like Texas Instruments, the LP2985SF5-3.3 specifically denotes the TAEJIN variant with a 3.3V fixed output. The 'SF5' suffix indicates the SOT-23-5L package configuration.

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

LP2985SF5-5.0 (Same manufacturer, different output voltage)

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

What is the recommended bypass capacitor value for the BYP pin?

A 470 pF capacitor should be attached to the BYP pin to improve low-noise performance.

How does the Enable (EN) pin function?

The EN pin provides logic-controlled shutdown; applying a high signal enables the output, while a low signal shuts it down to reduce power consumption.