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LM1117IDTX-3.3/NOPB

TILM1117IDTX-3.3/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Fixed 1 Output 800mA TO-252-3
NRND6,626 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM1117IDTX-3.3/NOPB is a low dropout linear regulator (LDO) providing a fixed 3.3V output with a current capacity of 800mA. It is housed in a robust TO-252 (DPAK) surface mount package, making it suitable for applications requiring moderate power dissipation and thermal stability. This industrial-grade variant operates across a wide temperature range from -40 to 125 degrees Celsius.

Why Choose This Part

This regulator offers a high PSRR of 75dB at 120Hz, ensuring effective rejection of input supply noise. It features built-in current limiting and thermal protection to prevent damage during fault conditions. The Zener trimmed band-gap reference provides high output voltage accuracy over the full operating temperature range.

Applications

Microcontroller Power Rail
Providing a stable 3.3V supply for logic circuits and MCU cores from 5V or higher input rails.
Industrial Control Systems
Used in PLC and sensor modules where thermal protection and over-current limiting are required for reliability.
Post-Regulation
Cleaning up ripple from switching regulators to provide low-noise power for sensitive analog front-ends.

Key Specifications

PSRR 75dB (120Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-252-3, DPAK (2 Leads + Tab), SC-63
Current - Output 800mA
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 15V
Voltage Dropout (Max) 1.2V @ 800mA
Current - Supply (Max) 10 mA
Supplier Device Package TO-252-3
Current - Quiescent (Iq) 5 mA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

Ensure that a minimum of 10uF tantalum capacitor is placed at the output for stability, as LDOs of this type require ESR for compensation. When designing the PCB layout, provide sufficient copper area around the TO-252 tab to act as a heat sink for the 800mA load current.

Also Consider

TLV1117-33IDCYR TITexas Instruments - A pin-compatible alternative that often provides a slightly lower quiescent current in a smaller SOT-223 footprint.

Categories

Power Management > LDO Voltage Regulators