LD39300PT-R

$1.06

Description：IC REG LINEAR POS ADJ 3A PPAK
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:e235f657f64a Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR POS ADJ 3A PPAK
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Adjustable
Number of Regulators：1
Voltage - Input (Max)：6V
Voltage - Output (Min/Fixed)：1.22V
Voltage - Output (Max)：5V
Voltage Dropout (Max)：0.4V @ 3A
Current - Output：3A
Current - Quiescent (Iq)：5 µA
Current - Supply (Max)：2.5 mA
PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
Control Features：Enable
Protection Features：Over Current, Over Temperature
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
Supplier Device Package：PPAK
Grade：-
Qualification：-

Download product information

LD39300PT-R

Overview

The LD39300PT-R is an ultra-low dropout BICMOS voltage regulator manufactured by STMicroelectronics. It provides a guaranteed output current of 3A with an operating input voltage range from 2.5V to 6V. The device features an adjustable output voltage ranging from 1.22V to 5.0V, utilizing a reference voltage of 1.22V. Key electrical parameters include a typical dropout voltage of 40mV at 600mA load and 200mV at 3A load. Quiescent current is typically 1.2mA in ON mode and drops to 1µA maximum in OFF mode. Line regulation is specified at 0.04%, and load regulation at 0.06%. The unit operates within a temperature range of -40°C to +125°C.

Feature Summary

Ultra-low dropout voltage performance for high efficiency linear regulation
Logic-controlled electronic shutdown capability for power management
Internal current limit and thermal protection mechanisms
Stable operation with ceramic output capacitors

Applications

Microprocessor power supply
DSPs power supply
Post regulators for switching supplies
High efficiency linear regulator

Procurement Notes

Verify the exact part number suffix against official STMicroelectronics documentation to confirm pinout compatibility and package type (DPAK vs PPAK). Confirm that the adjustable version requirements match your circuit design, specifically regarding external feedback resistors. Ensure all ordering details align with the manufacturer's current datasheet specifications before procurement.

Selection Notes

Select this component when designing circuits requiring high current delivery up to 3A with minimal voltage drop across the regulator. Consider the adjustable output feature for custom voltage rails between 1.22V and 5.0V. Evaluate thermal dissipation requirements based on the junction-to-ambient resistance values provided in the datasheet for the specific package variant chosen.

Part Context

The LD39300 series belongs to STMicroelectronics' family of fast, ultra-low dropout linear regulators developed using BiCMOS technology. This process enables low quiescent current operation independent of the output load current. The series includes both fixed and adjustable output variants, designed primarily for low-voltage microprocessor and memory applications where noise and efficiency are critical.