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Home Products Integrated Circuits (ICs)Specialized ICs~~LM20144QMHX/NOPB~~

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LM20144QMHX/NOPB - Texas Instruments

Name: Texas Instruments LM20144QMHX/NOPB
Brand: Texas Instruments
SKU: LM20144QMHX/NOPB
Availability: InStock
Rating: 5 (4 reviews)

Manufacturer Part Number: LM20144QMHX/NOPB

Manufacturer: Texas Instruments

Allelco Part Number: 41D-LM20144QMHX/NOPB

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 4,920 pcs available, New & Original

Parts Description: HTSSOP-16

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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LM20144QMHX/NOPB Tech Specifications
Texas Instruments - LM20144QMHX/NOPB technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LM20144QMHX/NOPB

Product Attribute	Attribute Value
Part Number	LM20144QMHX/NOPB
Package	HTSSOP-16
Description	HTSSOP-16
Stock Condition	Get 4920 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

LM20144QMHX/NOPB

Manufacturer

Texas Instruments

Introduction

The LM20144QMHX/NOPB is a high-performance, synchronous step-down DC-DC converter that provides a regulated output voltage from a wide input voltage range. It features an adjustable output voltage, high efficiency, and advanced protection features, making it suitable for a variety of power management applications.

Product Features and Performance

Wide input voltage range: 2.95V to 5.5V

Adjustable output voltage: 0.8V to 4.68V

Output current capacity: up to 4A

Switching frequency range: 500kHz to 1.5MHz

Synchronous rectification for high efficiency

Advanced protection features: overcurrent, overvoltage, and thermal shutdown

Product Advantages

High efficiency performance for improved power savings

Adjustable output voltage for flexibility in design

Robust protection features for reliable operation

Small surface-mount package for compact design

Key Reasons to Choose This Product

Exceptional power conversion efficiency to maximize battery life

Wide input voltage range and adjustable output for versatile applications

Compact size and integrated features simplify power supply design

Automotive-grade quality and reliability for demanding environments

Quality and Safety Features

Automotive-qualified to AEC-Q100 standard

Surface-mount package for robust mechanical integrity

Thermal shutdown and overcurrent protection for safe operation

Compatibility

The LM20144QMHX/NOPB is compatible with a wide range of electronic devices and systems that require a regulated DC power supply, including:

Automotive electronics

Industrial control systems

Consumer electronics

Portable devices

Application Areas

Automotive electronics

Industrial control systems

Consumer electronics

Portable devices

Product Lifecycle

The LM20144QMHX/NOPB is an active product, and our website's sales team continues to manufacture and support this model. There are no known equivalent or alternative models at this time. For the latest information on product availability and support, please contact our website's sales team.

Frequently Asked Questions(FAQ)

What are the key design constraints when integrating the LM20144QMHX/NOPB into an automotive power system, and how does its AEC-Q100 qualification influence reliability in harsh environments?: The LM20144QMHX/NOPB is designed for automotive applications requiring high reliability under extreme conditions. Its AEC-Q100 Grade 1 qualification ensures operation across a junction temperature range of -40°C to 125°C, which is critical for systems exposed to elevated temperatures or thermal cycling. The device’s robust internal protection mechanisms—including overcurrent, overtemperature, and undervoltage lockout—reduce failure risk during transient events common in vehicle environments. When designing with this regulator, engineers must ensure PCB layout minimizes parasitic inductance and resistance to maintain efficiency and thermal performance, especially given the 4A output current capability.

How does the adjustable output voltage range of the LM20144QMHX/NOPB impact component selection for low-voltage digital loads such as microcontrollers or sensors?: With an adjustable output from 0.8V to 4.68V, the LM20144QMHX/NOPB supports a wide range of modern low-power digital loads, including microcontrollers operating at sub-1V core voltages. This flexibility allows designers to precisely match supply requirements, improving power efficiency by avoiding unnecessary voltage headroom that would otherwise dissipate as heat. However, achieving stable regulation near the lower end (e.g., 0.8V) requires careful attention to feedback resistor tolerance, PCB noise immunity, and inductor selection to prevent instability due to reduced phase margin at high switching frequencies.

In what scenarios would the synchronous rectification feature of the LM20144QMHX/NOPB provide significant efficiency gains compared to a non-synchronous buck topology?: Synchronous rectification improves efficiency by replacing the body diode of a standard MOSFET with a low-resistance switch, reducing conduction losses—especially important at higher input-to-output differentials and full load currents. For the LM20144QMHX/NOPB, this translates to measurable improvements in systems where the input voltage is significantly greater than the output (e.g., 5V in, 1.8V out), or when operating at maximum 4A output under sustained loads. In battery-powered automotive subsystems, even small efficiency gains can extend operational life or reduce thermal stress on adjacent components.

How should the switching frequency range of 500kHz to 1.5MHz be managed when selecting external components for the LM20144QMHX/NOPB?: The programmable switching frequency enables trade-offs between size, efficiency, and EMI characteristics. Higher frequencies allow smaller inductors and capacitors but increase switching losses and electromagnetic interference. Designers typically select a frequency within this range based on available inductor footprints, acceptable ripple current, and noise budgets. For compact automotive modules, frequencies near 1.2–1.5MHz may be preferred to minimize passive component size, while lower frequencies like 750kHz might offer better efficiency if space permits larger components. The choice directly affects the value and saturation current rating of the external inductor and the RMS ripple current handling of output capacitors.

What are the implications of the LM20144QMHX/NOPB’s PowerWise® series heritage for total system power budgeting in energy-constrained automotive designs?: As part of Texas Instruments’ PowerWise® family, the LM20144QMHX/NOPB emphasizes optimized power conversion efficiency across load ranges. This means not only peak efficiency under full load but also effective operation at light loads—critical for always-on sensor nodes or infotainment systems that spend significant time in standby. The device includes features like pulse-skipping or forced PWM modes (if configurable via pin strapping), helping maintain regulation with minimal quiescent current draw. Engineers leveraging this device benefit from reduced thermal dissipation and improved battery life in hybrid or electric vehicles.

Can the LM20144QMHX/NOPB safely operate with input voltages below 2.95V, and what protections exist against reverse polarity or brownout conditions?: No, the absolute minimum input voltage is 2.95V per specifications; operation below this threshold risks latch-up or improper regulation. The device does not include built-in reverse polarity protection, so external diodes or FET-based circuits must be implemented if the application involves potential negative voltage transients. Additionally, the undervoltage lockout (UVLO) feature ensures the regulator disables switching when VIN drops too low, preventing unstable outputs that could corrupt downstream logic. Input capacitance must also meet minimum recommendations to support fast transient response during startup or load steps.

How does the HTSSOP package affect thermal management strategies when using the LM20144QMHX/NOPB in densely populated PCBs?: The 16-pin HTSSOP (PowerPad™) package offers excellent thermal performance through its exposed thermal pad, enabling heat spreading to the PCB ground plane. However, in high-density automotive electronics with limited copper area or multiple layers, thermal vias under the pad are essential to conduct heat away efficiently. Without adequate heatsinking, junction temperatures may exceed 125°C under continuous 4A loads with elevated ambient temperatures, triggering thermal shutdown. Designers should calculate power loss (P_loss = (V_in - V_out) × I_load + I_q × V_in) and verify derating curves from the datasheet to ensure safe operating margins.

How does the LM20144QMHX/NOPB compare to alternative buck regulators like the TPS62840 or LM5164 in terms of integration and automotive suitability?: While the TPS62840 offers similar adjustable output and up to 4A capability, it targets industrial rather than automotive grades and lacks AEC-Q100 qualification, making it less suitable for production vehicles. The LM5164 is another automotive-qualified option but uses a flyback-based quasi-resonant topology optimized for wide input ranges, whereas the LM20144QMHX/NOPB employs a traditional fixed-frequency PWM buck architecture with tighter output accuracy (±1%) and faster transient response. The LM20144’s integrated compensation network and simplified external component count make it advantageous in space-constrained, high-reliability designs where stability and ease of tuning are priorities.

What precautions are necessary when configuring the soft-start function on the LM20144QMHX/NOPB to avoid inrush current or upstream voltage sag?: The soft-start capacitor sets the ramp-up time of the output voltage, limiting inrush current during startup. If set too quickly (low capacitance), excessive current may flow into capacitive loads, potentially causing input rail droop or tripping upstream protections. Conversely, overly slow soft-start prolongs turn-on time unnecessarily. Typical values range from 10nF to 100nF depending on output capacitance and desired ramp rate. Designers should simulate or measure the initial current spike and ensure the upstream power source (e.g., a battery or pre-regulator) can sustain it without degradation. Coordination with other system rails via enable sequencing is also recommended.

Is the LM20144QMHX/NOPB suitable for use in systems requiring strict output voltage accuracy over temperature, such as precision sensor interfaces?: Yes, the LM20144QMHX/NOPB provides tight output accuracy typically within ±1% over the full operating temperature range (-40°C to 125°C), assuming proper feedback resistor selection and layout. This makes it appropriate for precision analog front-ends or ADC reference supplies where voltage drift impacts measurement integrity. However, unlike dedicated LDOs or precision references, it is not optimized for ultra-low noise; additional post-regulation filtering may be needed if the load is highly sensitive to ripple or switching noise. The high switching frequency also allows smaller filter components compared to lower-frequency alternatives.

How does moisture sensitivity level (MSL) classification affect storage and handling of tape-and-reel LM20144QMHX/NOPB units in manufacturing?: Classified as MSL 1, the LM20144QMHX/NOPB has unlimited floor life when stored in sealed, dry packaging. This simplifies inventory management and reduces the need for baking prior to assembly, which is beneficial in high-volume automotive production lines. Nevertheless, operators should adhere to ESD protocols during handling, as all surface-mount devices remain vulnerable to electrostatic discharge despite the protective reel and moisture barrier film. Standard JEDEC-compliant storage conditions (below 30°C, <60% RH) are sufficient for long-term preservation.

What role does the enable pin play in power sequencing when multiple PMICs share a common supply domain with the LM20144QMHX/NOPB?: The active-high enable pin allows external control of the regulator’s activation, facilitating coordinated power-up and shutdown sequences. This is crucial in multi-rail automotive systems where some ICs require earlier or later power delivery to prevent latch-up or data corruption. By connecting the enable pin to a supervisory IC or microcontroller GPIO, designers can implement precise timing relationships between the LM20144QMHX/NOPB and other regulators. Pull-down resistors should be avoided during normal operation to prevent unintended disablement due to floating inputs.

How does the base product number LM20144 relate to variant suffixes like QMHX/NOPB, and what distinguishes them in terms of compliance and availability?: The base part number LM20144 identifies the core functionality, while the suffixes denote specific attributes: “Q” indicates AEC-Q100 qualification, “M” specifies commercial temperature range (though here TJ extends to 125°C), “H” denotes HTSSOP package, and “NOPB” signifies lead-free and RoHS3 compliant finish. These variants ensure compatibility with automotive supply chains and regulatory standards. Engineers selecting the LM20144QMHX/NOPB confirm they are procuring a fully qualified, environmentally compliant device intended for mass production in safety-critical applications.

In a dual-battery automotive system with alternator spikes up to 40V, how should the LM20144QMHX/NOPB be protected from transient overvoltage events?: Although the LM20144QMHX/NOPB supports inputs up to 5.5V, real-world automotive transients (e.g., load dump) can exceed this. An external TVS diode rated for 40V clamping voltage should be placed close to the input connector, followed by bulk input capacitance. A pre-regulator or zener clamp circuit may also be used to limit VIN before it reaches the LM20144QMHX/NOPB. The device itself lacks transient overload protection beyond UVLO, so external safeguards are mandatory for robustness in live-jack or hot-plug scenarios typical in heavy-duty vehicles.

How does the synchronous rectifier configuration affect PCB layout complexity compared to asynchronous designs when implementing the LM20144QMHX/NOPB?: Synchronous rectification eliminates the need for a separate Schottky diode, simplifying the circuit by reducing component count and board space. However, it introduces additional high-side and low-side MOSFET connections that require careful placement to minimize parasitic inductance in the current path. For optimal performance with the LM20144QMHX/NOPB, gate drivers must be routed symmetrically, and power traces kept short and wide to reduce resistance and switching losses. Misalignment can cause shoot-through or inefficient conduction, degrading both efficiency and thermal performance.

What considerations apply when using the LM20144QMHX/NOPB in parallel with another regulator to share load current?: The LM20144QMHX/NOPB does not support true parallel operation natively. Attempting to share load without isolation diodes or active control leads to imbalance, circulating currents, and potential overstress. If load sharing is required, each regulator should drive separate branches with series diodes or use a dedicated load-sharing IC. Alternatively, a single high-current regulator or a multiphase controller might be more appropriate. For most automotive point-of-load applications, however, a single 4A solution like the LM20144QMHX/NOPB suffices without parallelization.

How does the frequency synchronization feature (if available) influence EMI mitigation strategies when deploying the LM20144QMHX/NOPB in a noisy RF environment?: Although the LM20144QMHX/NOPB operates in a fixed-frequency range, many variants support external clock synchronization to align switching edges with other converters, thereby concentrating EMI energy at a predictable frequency rather than spreading it across a spectrum. This aids compliance testing and reduces broadband noise. In automotive cabins with sensitive radio receivers or CAN bus communications, synchronizing multiple regulators can prevent beat frequencies that interfere with RF signals. Proper grounding and shielding remain essential regardless of synchronization.

What are the typical applications where the combination of 4A output, adjustable voltage, and automotive grading of the LM20144QMHX/NOPB provides distinct advantages?: This device excels in powering FPGAs, microprocessors, and memory subsystems in infotainment ECUs, ADAS cameras, and gateway modules where moderate current demands meet tight space and reliability constraints. Its ability to step down from 5V legacy buses (e.g., LIN or local interconnect) to modern processor cores enables backward-compatible architectures without sacrificing efficiency. The AEC-Q100 qualification and wide operating temperature range further ensure consistent performance in engine compartments, lighting hubs, and body control units exposed to vibration, humidity, and temperature extremes.

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Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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