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Texas Instruments LM2576S-12 — Power Management (PMIC / Gate Driver)

LM2576S-12 Texas Instruments SIMPLE SWITCHER® 3A Buck

MPNLM2576S-12
NRND

Texas Instruments SIMPLE SWITCHER® series, LM2576S-12, fixed 12V output, 3A step-down buck regulator, 52 kHz switching frequency, TO-263-5 surface-mount package, -40°C to 125°C junction temperature range.

$4.0720Ref. price · indicative, final on quote
Texas Instruments LM2576S-12 datasheet (PDF)
PackagingTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
RoHSROHS3 Compliant
SeriesLM2576
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM2576S-12 specifications
ParameterValue
SeriesSIMPLE SWITCHER®
Output typeFixed
MountingSurface Mount
Voltage - input40V
Voltage - output (Min (Fixed))12V
Output current3A
Frequency52kHz
I/O channels1
Operating temperature-40°C~125°C(TJ)
PackageTube
FunctionStep-Down
TopologyBuck
CaseTO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Output configurationPositive
Synchronous rectifierNo

Product details

3A fixed 12V buck regulator for industrial power rails

The LM2576S-12 is a fixed 12 V output, 3 A step-down buck regulator from the SIMPLE SWITCHER® series. It operates from a 4 V to 40 V input range at a 52 kHz switching frequency, with no synchronous rectifier — the external Schottky diode handles the catch current. The 52 kHz switching frequency keeps inductor core losses modest and simplifies PCB layout.

New builds should evaluate a drop-in replacement from the same SIMPLE SWITCHER® family before a last-time-buy notice appears.

TO-263-5 package and thermal management

Supplied in a TO-263-5 (DDPAK) surface-mount package with an exposed tab on the D²Pak footprint. The tab is the ground path and the primary heat sink.

Frequently asked questions

Is LM2576S-12 obsolete or NRND?

The LM2576S-12 carries an NRND (Not Recommended for New Designs) status from Texas Instruments. It is not yet obsolete, but the manufacturer advises against using it in new designs. Existing production can continue, but a last-time-buy window may open. Sourcing is available per RFQ — confirm current availability and lead time at quote.

What is the difference between LM2576S-12 and LM2576S-ADJ?

The LM2576S-12 has a fixed 12 V output (no external feedback divider needed). The LM2576S-ADJ uses an adjustable output set by two external resistors. Both share the same 3 A current rating, 52 kHz switching frequency, TO-263-5 package, and pinout — the ADJ version is a direct footprint replacement if the feedback network is added.