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LM1117IMPX-ADJ/NOPB

TILM1117IMPX-ADJ/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Adjustable 1 Output 800mA SOT-223-4
NRND6,420 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM1117IMPX-ADJ/NOPB is a versatile low-dropout (LDO) linear voltage regulator capable of providing up to 800mA of output current. It features an adjustable output voltage range starting from 1.25V up to 13.8V, making it suitable for a wide variety of local on-card regulation tasks. The device includes built-in thermal protection and current limiting to ensure system reliability under fault conditions.

Why Choose This Part

The LM1117 series offers a high Power Supply Rejection Ratio (PSRR) of 75dB at 120Hz, ensuring excellent noise immunity. It utilizes a Zener trimmed band-gap reference to maintain high output accuracy. The SOT-223 package provides a balance between small surface-mount footprint and effective thermal dissipation.

Applications

Microprocessor Core Supplies
Providing stable, low-noise local regulation for digital logic and processing cores requiring up to 800mA.
Battery Chargers
Utilizing the adjustable output to set precise float voltages for various battery chemistries.
Post-Regulation for Switching Supplies
Reducing ripple and noise from DC/DC converters to provide clean rails for sensitive analog circuitry.
Consumer Electronics
High-efficiency regulation for handheld devices where space is limited and a SOT-223 package is preferred.

Key Specifications

PSRR 75dB (120Hz)
Output Type Adjustable
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
Voltage - Output (Max) 13.8V
Supplier Device Package SOT-223-4
Current - Quiescent (Iq) 5 mA
Voltage - Output (Min/Fixed) 1.25V

Getting Started

When designing with the adjustable version, use two external resistors to set the output voltage based on the 1.25V internal reference. Ensure a minimum of 10uF tantalum capacitance at the output for stability across all load conditions. Consult the datasheet for the thermal resistance calculations of the SOT-223 package to ensure proper PCB copper pouring for heat sinking.

LM1117 Family

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

Part Number Package Output V PSRR Output Type Temp Range Voltage - Input (Max) Stock
LM1117IMPX-ADJ/NOPB (this part) 4-261 1.25V 120Hz Adjustable -40degC ~ 125degC 15V 6,420
LM1117MPX-5.0/NOPB 4-261 5V 120Hz Fixed 0degC ~ 125degC 15V 2,995
LM1117IMPX-3.3/NOPB 4-261 3.3V 120Hz Fixed -40degC ~ 125degC 15V 51,850
LM1117MPX-1.8/NOPB 4-261 1.8V 120Hz Fixed 0degC ~ 125degC 15V 2,787
LM1117MPX-33NOPB (onsemi) 4-261 3.3V 120Hz Fixed 0degC ~ 125degC (TA) 20V 39,892
LM1117MP-3.3/NOPB (Various) 4-261 3.3V 120Hz Fixed 0degC ~ 125degC 15V 52,590
LM1117IMPX-5.0/NOPB 4-261 5V 120Hz Fixed -40degC ~ 125degC 15V 3,044
LM1117IDTX-3.3/NOPB 3-252 3.3V 120Hz Fixed -40degC ~ 125degC 15V 6,626
Also available as: LM1117MPX-ADJ/NOPB, LM1117MPX-3.3/NOPB, LM1117T-3.3/NOPB

Also Consider

AMS1117-ADJ Advanced Monolithic Systems - A widely available and cost-effective alternative for general purpose regulation in non-NOPB required designs.

Categories

Power Management > LDO Voltage Regulators
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