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LD39200DPUR

LD39200DPUR

STMicroelectronics
Linear Voltage Regulator IC Positive Adjustable 1 Output 2A 8-DFN (4x4)
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Overview

The LD39200DPUR is a high-current, low-dropout linear regulator providing up to 2A of output current from an input voltage as low as 1.25V. It is designed for high-efficiency power conversion in noise-sensitive applications, featuring an adjustable output voltage and a high Power Supply Rejection Ratio of 70dB at 1kHz. The device includes integrated protection against reverse polarity, thermal overload, and overcurrent conditions.

Why Choose This Part

The LD39200DPUR offers a significant current-to-size ratio in an 8-DFN (4x4) package with a very low quiescent current of 300uA and a logic-controlled shutdown mode. Its built-in Power Good signal simplifies system sequencing, while reverse polarity protection eliminates the need for external diodes in many designs.

Applications

Point-of-Load Regulation
High-current 2A capability makes it ideal for powering FPGAs, DSPs, and high-performance microprocessors from lower voltage rails.
Telecom Infrastructure
Provides stable, low-noise power for communication modules and base station sub-systems where high PSRR is required.
Industrial Instrumentation
Used to regulate sensitive analog circuitry requiring protection against reverse polarity and thermal events.
Post-Regulation
Acts as a high-current filter after a switching regulator to minimize ripple while maintaining high efficiency via low dropout voltage.

Key Specifications

PSRR 70dB ~ 40dB (1kHz ~ 1MHz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case 8-VDFN Exposed Pad
Control Features Enable, Power Good
Current - Output 2A
Protection Features Over Current, Over Temperature, Reverse Polarity
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Input (Max) 6V
Voltage Dropout (Max) 0.25V @ 2A
Current - Supply (Max) 3 mA
Voltage - Output (Max) 5.75V
Supplier Device Package 8-DFN (4x4)
Current - Quiescent (Iq) 300 uA
Voltage - Output (Min/Fixed) 0.5V

Getting Started

To evaluate the LD39200 series, engineers can use the STEVAL-ISB033V1 evaluation board or design a custom PCB following the datasheet recommendation for low-ESR ceramic capacitors. Ensure the 8-VDFN exposed pad is soldered to a large copper area to maximize thermal dissipation for high-current loads.