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Texas Instruments LM2651MTC-ADJ/NOPB — Discrete Semiconductors

Texas Instruments LM2651MTC-ADJ/NOPB Buck Regulator, 1.5 A

MPNLM2651MTC-ADJ/NOPB
End of Life

Texas Instruments LM2651MTC-ADJ/NOPB adjustable step-down buck converter, 1.5 A output, 300 kHz switching, synchronous rectification, 16-TSSOP package, -40°C to 125°C junction temperature.

$4.76Ref. price · indicative, final on quote
Texas Instruments LM2651MTC-ADJ/NOPB datasheet (PDF)
Packaging16-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM2651MTC-ADJ/NOPB specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input14V
Voltage - output13V
Voltage - output (Min (Fixed))1.238V
Output current1.5A
Frequency - switching300kHz
I/O channels1
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
FunctionStep-Down
TopologyBuck
Case16-TSSOP (0.173\", 4.40mm Width)
Output configurationPositive
Synchronous rectifierYes

Product details

1.5 A adjustable buck with synchronous rectification

The LM2651MTC-ADJ/NOPB: The 300 kHz fixed switching frequency is a deliberate choice — it keeps switching losses moderate while allowing small inductor values (typically 10 µH to 33 µH) and ceramic output capacitors. The internal synchronous rectifier eliminates the external Schottky catch diode, improving efficiency at low output voltages where the diode forward drop would otherwise dominate conduction loss.

Temperature grade and package for board integration

The ROHS3 compliance covers the full bill of materials including the lead-frame finish — no exemption declarations needed for EU or UKCA market entry.

Frequently asked questions

What is the closest functional second-source to LM2651MTC-ADJ/NOPB?

The TPS65261RHBT is a triple-output buck converter with 3 A per channel and 2 MHz switching frequency — it is not a pin-compatible or drop-in replacement for the single-output 1.5 A LM2651MTC-ADJ/NOPB. The TPS65261RHBT targets a different application space (multi-rail POL regulation) and requires a different PCB layout and inductor selection.

What compliance documentation does Texas Instruments provide for LM2651MTC-ADJ/NOPB?

The part is ROHS3 Compliant, covering the full bill of materials without exemptions. Texas Instruments provides a Declaration of Conformity and material composition data through their product page.