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LM1117IMPX-3.3/NOPB

TILM1117IMPX-3.3/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Fixed 1 Output 800mA SOT-223-4
Active51,850 in stock
Datasheet Digi-Key Compare Prices

Overview

The LM1117IMPX-3.3/NOPB is a low-dropout linear regulator from Texas Instruments providing a fixed 3.3V output. It is capable of delivering up to 800mA of load current and features a wide operating temperature range of -40 to 125 degrees Celsius. This SOT-223 packaged device includes internal current limiting and thermal protection to ensure system reliability.

Why Choose This Part

The regulator features a high Power Supply Rejection Ratio (PSRR) of 75dB at 120Hz, making it effective at filtering input noise. It is robustly protected against faults with integrated over-current and over-temperature shutdown. The Zener trimmed band-gap reference ensures high output accuracy across its operating range.

Applications

Local Logic Supplies
Providing clean 3.3V power to microcontrollers and digital logic from a 5V or higher rail.
Post-Regulation for Switching Supplies
Reducing ripple and noise from DC-DC converters in sensitive analog or mixed-signal circuits.
Battery Powered Systems
Regulating 3.3V for portable electronics where 800mA capacity is required for peak loads.

Key Specifications

PSRR 75dB (120Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
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 SOT-223-4
Current - Quiescent (Iq) 5 mA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

When designing the PCB, ensure a minimum of 10uF tantalum capacitor is placed at the output to maintain stability. The SOT-223 package uses the Tab (Pin 4) as the VOUT connection and for heat dissipation; maximize copper area on this pin to manage thermal performance when operating near the 15V maximum input voltage.

Part of LM1117 / LD1117 LDO family » LM1117IMPX

LM1117IMPX Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Output Type Output V Stock
LM1117IMPX-3.3/NOPB (this part) Fixed 3.3V 51,850
LM1117IMPX-5.0/NOPB Fixed 5V 3,044
LM1117IMPX-ADJ/NOPB Adjustable 1.25V 6,420

Also Consider

AZ1117CH-3.3TRG1 DIODiodes Incorporated - A cost-effective 1A rated version of the 1117 regulator for applications needing slightly more current headroom.

Categories

Power Management > LDO Voltage Regulators