Texas Instruments LM2744MTC/NOPB

Mfr. Part

LM2744MTC/NOPB

Manufacturer

Luminary Micro / Texas Instruments

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Detailed Description

Synchronous buck controller for step-down DC/DC power conversion. Drives external N-channel MOSFETs and regulates a positive output. Wide adjustable switching frequency (50 kHz to 1 MHz), 3 V to 6 V control supply, single-phase output, and robust control features for reliable point-of-load regulation. Package: 14-pin TSSOP, RoHS3 compliant, lead-free (NOPB).

Key Features

Topology: Buck (step-down)

Output type: Transistor driver for external N-MOSFETs (synchronous rectification enabled)

Supply voltage (VCC): 3 V to 6 V

Switching frequency: Adjustable 50 kHz to 1 MHz

Outputs: 1, single-phase

Duty cycle max: 80%

Output configuration: Positive

Control features: Current limit, Enable, Frequency control (RT), Power Good (PG), Soft-start (SS), Output tracking (TRACK)

Clock sync: No

Operating temperature: -40°C to +125°C (TJ)

Mounting type: Surface-mount

Package/case: 14-TSSOP (0.173" body width, 4.40 mm)

Base product number: LM2744

RoHS: ROHS3 compliant

Shipment packaging: Tube

Key Advantages

Flexible design: Wide frequency range lets you optimize efficiency vs. transient response

High efficiency: Synchronous rectification reduces conduction losses with external MOSFETs

Fast startup and safe ramp: Soft-start and tracking simplify sequencing of multiple rails

Reliable regulation: Power Good and current limit improve system robustness

Compact footprint: 14-TSSOP package fits dense boards

Simple control supply: Operates from standard 3.3 V or 5 V bias rails

Packaging

Type: 14-TSSOP surface-mount IC

Material: Molded epoxy package, copper lead frame; Pb-free NOPB; RoHS3 compliant

Size: 4.40 mm body width, ~5.0 mm length, low profile height; 0.65 mm pin pitch (typical for TSSOP-14)

Pin configuration (typical functional pins): VCC, GND, FB (feedback), COMP (compensation), SS (soft-start), EN (enable), PGOOD, TRACK, RT (frequency set), UGATE (high-side gate drive), LGATE (low-side gate drive), BOOT (bootstrap), SW (switch node), ILIM/CS (current sense/limit). Refer to datasheet for exact pinout.

Thermal characteristics: Junction temperature range -40°C to +125°C; thermal performance depends on PCB layout and copper area (use ample ground plane for heat spreading)

Electrical properties: VCC 3–6 V control supply; synchronous gate drivers for N-MOSFETs; adjustable 50 kHz–1 MHz switching; up to 80% duty cycle; single-phase operation; positive output

Lifecycle

Status: Active and widely supported

Not nearing discontinuation based on current availability

Equivalent/alternative models (verify fit to your design requirements):

- TI LM2743: Synchronous buck controller in the same family, similar feature set with variations in ramp/compensation

- TI LM2745 / LM2746: Related TI buck controllers with differing voltage ranges and control features

- TI TPS40190/193 series: TI synchronous buck controllers with comparable gate drivers and feature sets

Selection depends on input bus voltage, desired switching frequency, gate-drive strength, protection features, and pinout. Review datasheets to confirm compatibility.

If you need a drop-in replacement or a vetted cross-reference, contact our sales team via the Y-IC website for detailed guidance

Key Application Areas

Point-of-load regulators for CPUs, GPUs, FPGAs, ASIC cores

Industrial and test equipment low-voltage rails

Telecom and networking infrastructure

Storage, servers, and workstation motherboards

Consumer electronics and embedded systems needing 3.3 V/5 V to sub-1 V rails

Battery-powered or portable systems using 5 V bias for control supply

Datasheet

Y-IC provides the most authoritative, up-to-date datasheet for LM2744MTC/NOPB on our product page. We recommend downloading it here to get full specifications, pin definitions, typical application circuits, and design guidelines.

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