Texas Instruments LP38693MP-3.3 3.3V 500mA LDO Voltage Regulator SOT-223-5

The Texas Instruments LP38693MP-3.3 LDO Voltage Regulator provides a fixed 3.3V output with a maximum current of 500mA, making it a practical choice for stable power regulation. Its low-dropout CMOS linear design is suited to efficient, dependable power delivery across a wide range of electronic systems.

Overview

This precision linear voltage regulator uses a PMOS power transistor architecture, which removes the need for DC base-drive current. The result is a ground pin current below 100µA across all load currents, input voltages, and operating temperatures. With an extremely low dropout voltage of 250mV, it maintains stable operation even when the input voltage is close to the output level, which helps maximise battery life in portable applications.

Key Features

• Tight output voltage tolerance, typically within 2%, achieved through a trimmed band-gap reference
• Thermal overload protection that shuts down the regulator when excessive junction temperature is detected
• Fold-back current limiting for short-circuit and overload protection
• Enable pin for external control, supporting power sequencing and helping to reduce overall system power consumption
• Off-state quiescent current of just 1µA
• Designed for stability with ultralow equivalent series resistance (ESR) ceramic output capacitors

Specifications

• Output Voltage: 3.3V fixed
• Maximum Output Current: 500mA
• Dropout Voltage: 250mV
• Package: SOT-223-5
• Dimensions: Width 3.3, Depth 1.5, Height 4.3
• Weight: 0.239 g

Applications

Suited to a wide range of electronic systems that require clean, stable, and efficient power regulation, and to portable applications where battery life is a priority. The device is manufactured with no antimony or bromine (no Sb/Br), in line with environmental directives. Choose the Texas Instruments LP38693MP-3.3 LDO Voltage Regulator when a fixed 3.3V, 500mA supply with low dropout and enable control is required.