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LM2596SX-12/NOPB

TILM2596SX-12/NOPB

Texas Instruments
Buck Switching Regulator IC Positive Fixed 12V 1 Output 3A TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
NRND1,607 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM2596SX-12/NOPB is a fixed-output monolithic step-down switching regulator capable of driving a 3A load with high efficiency. Operating at a switching frequency of 150kHz, it simplifies power supply design by requiring a minimum number of external components. This TO-263 surface-mount device provides a stable 12V rail from input voltages up to 40V.

Why Choose This Part

This regulator features internal frequency compensation and a fixed-frequency oscillator, which reduces the complexity of the external circuit design. It includes robust protection features such as thermal shutdown and cycle-by-cycle current limiting, alongside a low-power standby mode with a typical shutdown current of 80uA.

Applications

Fixed 12V System Rails
Providing a regulated 12V supply for industrial control systems and logic boards from higher voltage DC buses.
Pre-Regulator for Linear Regulators
Acting as a high-efficiency first stage to drop input voltages before final precision regulation.
On-Card Switching Regulators
Efficiently localizing power conversion to reduce noise and thermal overhead on dense PCB layouts.

Key Specifications

Function Step-Down
Topology Buck
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Current - Output 3A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 150kHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 4.5V
Supplier Device Package TO-263 (DDPAK-5)
Voltage - Output (Min/Fixed) 12V

Getting Started

When designing with this part, ensure the input capacitor is placed as close as possible to the VIN and GND pins to minimize inductive ringing. Reference the Texas Instruments datasheet for specific inductor and catch diode selection tables tailored for the 12V fixed output version to ensure stability across the full 3A load range.

Part of LM2596 Switching Regulators family » LM2596

LM2596 Family

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

Part Number Output Type Output V Stock
LM2596SX-12/NOPB (this part) Fixed 12V 1,607
LM2596S-ADJ-EV (EVVO) Adjustable 1.2V 694
Also available as: LM2596DSADJG, LM2596TVADJG, LM2596

Categories

Power Management > Switching Regulators