Texas Instruments LM2745MTC/NOPB

Mfr. Part

LM2745MTC/NOPB

Manufacturer

Luminary Micro/Texas Instruments

Y-IC is a quality distributor of Texas Instruments brand products. We commit to supplying genuine parts, fast delivery, and professional technical support to give you the best products and services.

Detailed Description

Synchronous buck PWM controller that drives external N‑channel MOSFETs to step down a higher input to a lower regulated output

Operates from a 3 V to 6 V bias supply, with programmable switching from 50 kHz to 1 MHz and external clock synchronization

Single phase, voltage‑mode control with current limit, soft start, tracking, enable, frequency control, and power‑good signaling

Ideal for high‑efficiency point‑of‑load supplies derived from 5 V rails

RoHS3 compliant, surface‑mount 14‑TSSOP package

Base product number LM2745

Key Features

Topology buck (step‑down), positive output

Synchronous rectification for high efficiency

Output type transistor gate driver for external MOSFETs

Supply voltage 3 V to 6 V (VCC bias)

Switching frequency 50 kHz to 1 MHz (programmable) with clock sync

Duty cycle up to 86 percent (max)

Control features current limit, enable, frequency control, power good, soft start, tracking

Output phases 1

Operating temperature −40°C to +125°C (TJ)

RoHS3 compliant

Key Advantages

High efficiency at medium to high load due to synchronous operation

Wide frequency range lets you optimize for size, efficiency, or EMI

External MOSFETs give design freedom for current and voltage targets

Power‑good, soft start, and tracking simplify sequencing of CPUs, FPGAs, and ASICs

Clock sync helps reduce system EMI and beat‑frequency issues

Compact 14‑TSSOP saves board space and eases routing

Proven TI LM274x architecture with broad ecosystem and documentation

Packaging

Type 14‑TSSOP, tube packaging for assembly lines

Material molded epoxy package with copper leadframe and lead‑free plating (RoHS3 compliant)

Size body width about 4.40 mm, standard TSSOP‑14 footprint (see datasheet package outline for exact dimensions)

Pin configuration 14 leads, 0.65 mm pitch typical for TSSOP‑14

• Typical functional pins include VCC, EN, PGOOD, SS/TRK, COMP, FB, RT/SYNC or FS/SYNC, UGATE, LGATE, SW/PHASE, BOOT, AGND/PGND (refer to the datasheet for exact pin names and assignments)

Thermal characteristics junction operating −40°C to +125°C; thermal resistance depends strongly on PCB copper and airflow (see datasheet for θJA/θJC and recommended layout with thermal copper)

Electrical properties at the controller level

• Bias supply 3 V to 6 V

• Switching frequency 50 kHz to 1 MHz adjustable, external sync supported

• Max duty cycle 86 percent

• Synchronous gate drive for high‑side and low‑side N‑MOSFETs

• Control features current limit, soft start, tracking, power good, enable

Lifecycle

Status based on public information generally active and not near discontinuation. For the latest lifecycle confirmation, please check with Y‑IC.

Equivalent or alternative models to consider (verify specs, pinout, and control method for your design)

• Texas Instruments LM2743, LM2744, LM2746 (same LM274x family, synchronous buck controllers with similar control features and frequency ranges)

• Texas Instruments TPS40061, TPS40060 (voltage‑mode synchronous buck controllers, wide input options)

• Texas Instruments TPS40140 (dual‑phase controller if you need higher current or multiphase)

• ON Semiconductor NCP1587A, NCP1588 (synchronous buck controllers for 5 V/12 V systems)

• Analog Devices ADP1828, ADP1829 (synchronous buck controllers, single/dual)

• Renesas/Intersil ISL6522, ISL6549 (synchronous buck controllers for POL)

• Richtek RT728x/RT8xxx controllers (various synchronous buck controllers for POL)

If none of these meet your exact requirements or you need a pin‑compatible drop‑in, contact our sales team via the Y‑IC website for tailored recommendations.

Key Application Areas

Point‑of‑load regulators for CPUs, GPUs, FPGAs, and ASICs

Telecom and networking line cards and base stations powered from 5 V intermediate bus

Industrial and instrumentation systems needing efficient local rails

Storage, servers, and PC motherboards or add‑in cards

Distributed power architectures and VRMs

High‑current step‑down supplies with sequencing and tracking needs

Datasheet

Y‑IC hosts the most authoritative datasheet for LM2745MTC/NOPB on our product page. We recommend downloading it now for full electrical characteristics, pinout, layout guidance, and package drawings.

Request for Quotation Now

Ready to buy or need volume pricing Save time and cost with Y‑IC

Get a Quote today on our website

Limited Time Offer fast response and competitive pricing

Learn More by contacting our sales team online for technical cross‑references, stocking plans, and supply assurance