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Texas Instruments LM3370SD-3621/NOPB — Power Management (PMIC / Gate Driver)

LM3370SD-3621/NOPB Dual Buck Regulator, 2 MHz, Obsolete

MPNLM3370SD-3621/NOPB
Obsolete

Texas Instruments LM3370SD-3621/NOPB dual step-down buck regulator, 2 MHz switching frequency, fixed 1.5V and 3.3V outputs, 600 mA per channel, 16-WSON exposed pad, -30°C to 85°C.

Texas Instruments LM3370SD-3621/NOPB datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3370SD-3621/NOPB specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input5.5V
Voltage - output (Min (Fixed))1.5V, 3.3V
Output current600mA
Frequency - switching2MHz
I/O channels2
Operating temperature-30°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case16-WFDFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes

Product details

Dual 600 mA buck — fixed 1.5 V / 3.3 V rails

The LM3370SD-3621/NOPB is a dual-channel step-down (buck) switching regulator from Texas Instruments, delivering a fixed 1.5 V output on one channel and 3.3 V on the other, each rated for 600 mA continuous. The synchronous rectifier (no external Schottky diode needed) keeps the BOM count low, and the fixed output voltages mean no feedback divider resistors on the board.

For a production BOM, this part is a single-source risk — you will need to qualify a replacement or source remaining stock through independent distribution.

Package and thermal — 16-WSON exposed pad

The 2 MHz switching frequency pushes the switching losses, but the synchronous rectifier helps efficiency — layout should keep the switch node loop small to minimise radiated noise.

Frequently asked questions

Is LM3370SD-3621/NOPB obsolete?

Obsolete status blocks new designs and requires last-time buy or replacement search.

What is the replacement for LM3370SD-3621/NOPB?

Designers and buyers need a drop-in or functional alternative to continue production.

What is the output voltage of LM3370SD-3621/NOPB?

Fixed output voltage must match the load requirement; wrong voltage breaks the circuit.

Where can I buy LM3370SD-3621/NOPB in stock?

Sourcing inventory quickly avoids production delays; stock levels dictate procurement strategy.

What is the pin configuration of LM3370SD-3621/NOPB?

Pin compatibility with existing PCB layout is critical for drop-in replacement or new design.

What is the operating temperature range of LM3370SD-3621/NOPB?

Thermal environment must be within -30°C to 85°C to ensure reliable operation.