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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsLM76003RNPR
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LM76003RNPR - Texas Instruments

Manufacturer Part Number
LM76003RNPR
Manufacturer
Texas Instruments
Allelco Part Number
32D-LM76003RNPR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
16,460 pcs available, New & Original
Parts Description
IC REG BUCK ADJ 3.5A 30WQFN
Package
30-WQFN (6x4)
Data sheet
LM76003RNPR.pdf

PCN Design/Specification

LM7600y Datasheet Chg 15/Oct/2019.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 16460
  • Unit Price: $1.755
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.755 $1.76
10+ $1.506 $15.06
30+ $1.351 $40.53
100+ $1.192 $119.20
500+ $1.12 $560.00
1000+ $1.089 $1,089.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

LM76003RNPR Tech Specifications
Texas Instruments - LM76003RNPR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LM76003RNPR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 1V
Voltage - Output (Max) 57V
Voltage - Input (Min) 3.5V
Voltage - Input (Max) 60V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package 30-WQFN (6x4)
Series -
Package / Case 30-WFQFN Exposed Pad
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Adjustable
Output Configuration Positive
Operating Temperature -40°C ~ 125°C (TJ)
Number of Outputs 1
Mounting Type Surface Mount, Wettable Flank
Function Step-Down
Frequency - Switching 300kHz ~ 2.2MHz
Current - Output 3.5A
Base Product Number LM76003

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

LM76003RNPR Image
LM76003RNPR (1)

Manufacturer Part Number

LM76003RNPR

Manufacturer

Texas Instruments

Introduction

High-performance, highly integrated 3.5A synchronous buck regulator

Product Features and Performance

Wide input voltage range: 3.5V to 60V

Adjustable output voltage from 1V to 57V

5A continuous output current

Switching frequency range: 300kHz to 2.2MHz

Synchronous rectification for high efficiency

Internal slope compensation for stability

Cycle-by-cycle current limiting

Thermal shutdown protection

Undervoltage lockout

Product Advantages

Compact 30-WQFN (6x4) package

High efficiency and power density

Wide input voltage range

Adjustable output voltage

Robust protection features

Key Technical Parameters

Input voltage range: 3.5V to 60V

Output voltage range: 1V to 57V

Output current: 3.5A

Switching frequency: 300kHz to 2.2MHz

Package: 30-WQFN (6x4)

Quality and Safety Features

ROHS3 compliant

Thermal shutdown protection

Cycle-by-cycle current limiting

Undervoltage lockout

Compatibility

Surface mount, wettable flank

Tape and reel packaging

Application Areas

Industrial and automotive applications

Power supplies for communications equipment

Battery chargers and power tools

Distributed power systems

Product Lifecycle

Current product, no indication of discontinuation

Replacement or upgrade options available from Texas Instruments

Several Key Reasons to Choose This Product

Wide input voltage range for versatile applications

High output current capability up to 3.5A

Adjustable output voltage from 1V to 57V

Compact 30-WQFN package for space-constrained designs

Robust protection features for reliable operation

High efficiency and power density

Frequently Asked Questions(FAQ)

How does the LM76003RNPR handle input voltage transients during automotive cold crank conditions, and what are the implications for system-level robustness?
The LM76003RNPR supports an input voltage range of 3.5V to 60V, which enables it to maintain regulation even under significant input drops or surges typical in automotive environments. During cold crank events—where a battery voltage can momentarily dip below nominal levels—the regulator’s wide input tolerance allows continued operation without dropout, assuming sufficient headroom exists between the transient minimum and the set output voltage. However, if the input falls below the sum of the desired output and the minimum required drop-out voltage (typically a few hundred millivolts at full load), the device may enter dropout mode, causing output instability. Designers should ensure that the worst-case cold crank voltage, combined with inductor DC resistance and switch on-resistance losses, still leaves enough margin above the output voltage setting for stable operation.
What trade-offs exist between switching frequency selection and efficiency when using the LM76003RNPR in high-current, thermally constrained applications?
The LM76003RNPR operates over a programmable frequency range from 300kHz to 2.2MHz, allowing designers to balance component size against conduction and switching losses. Lower frequencies within this range reduce switching losses and improve efficiency, particularly beneficial in continuous conduction mode (CCM) at high loads like 3.5A. However, lower frequencies require larger inductors and capacitors to maintain ripple specifications, increasing board real estate and cost. Conversely, higher frequencies enable smaller passive components but increase switching losses and electromagnetic interference (EMI). For thermal-sensitive designs, selecting a moderate frequency around 1–1.5MHz often provides a practical compromise, leveraging the integrated synchronous rectifier to minimize diode conduction losses and keep junction temperatures manageable under full load.
Can the LM76003RNPR be used in parallel to share current between multiple regulators, and what synchronization challenges must be addressed?
While the LM76003RNPR does not support interleaving or forced-phase synchronization natively, it is technically possible to operate multiple units in parallel for higher total current delivery. However, this requires careful attention to loop stability, current balancing, and noise coupling due to lack of phase alignment. Without external synchronization, beat-frequency interactions can cause audible noise or degraded ripple performance. Moreover, internal feedback loops may interfere with one another, leading to oscillation or poor transient response. TI typically recommends against paralleling unless strictly necessary, and even then, only with additional active current-sharing circuitry and thorough layout validation. In most cases, a single 3.5A regulator like the LM76003RNPR suffices, eliminating such complexity.
How does the adjustable output voltage configuration of the LM76003RNPR affect PCB layout requirements compared to fixed-output alternatives?
Because the LM76003RNPR features an adjustable output (1V to 57V), the feedback resistor network directly influences output accuracy and noise sensitivity. This necessitates tighter layout constraints than fixed-output regulators: the FB pin traces must be short, isolated from noisy nodes, and placed close to the output capacitor to minimize parasitic inductance and capacitance. Poor routing can introduce measurement errors, degrade transient response, or create susceptibility to EMI-induced glitches. Additionally, standard design practices recommend using precision resistors with low temperature coefficients and ensuring Kelvin connections to the output node. These considerations are more critical than in fixed-voltage designs, where internal reference tolerances dominate error budgets rather than external divider imperfections.
What role does the wettable flank package play in automated optical inspection (AOI) during high-volume manufacturing of circuits using the LM76003RNPR?
The 30-WQFN exposed pad package with wettable flank technology facilitates reliable solder joint inspection by allowing molten solder to wick up along the sides of the leads during reflow. This creates visually detectable fillets that AOI systems can easily recognize as proper wetting, reducing false rejects from insufficient or incomplete solder joints. For high-volume production involving the LM76003RNPR, this feature enhances process control and reduces yield loss due to hidden defects. It also improves mechanical strength of the connection, which is especially valuable given the thermal cycling stresses common in automotive and industrial applications.
When designing a battery-powered system with variable load profiles, how should the switching frequency of the LM76003RNPR be optimized across different operating modes?
In battery-powered applications, maximizing efficiency at light loads is often more impactful than peak efficiency at full load. The LM76003RNPR supports pulse-skipping or discontinuous modes depending on implementation, but its fixed-frequency architecture means frequency itself doesn’t change with load. Instead, designers can exploit the 300kHz–2.2MHz range to select a frequency that minimizes quiescent current overhead while accommodating small form factor requirements. For example, choosing 800kHz might allow use of compact 0402-sized passives while keeping switching losses low enough for acceptable efficiency across the entire load curve. The key is aligning frequency choice with target BOM cost, size, and EMI compliance needs rather than seeking absolute peak efficiency.
What precautions are necessary when implementing overcurrent protection with the LM76003RNPR beyond relying solely on its internal foldback scheme?
Although the LM76003RNPR includes internal current limiting and short-circuit protection, external safeguards are advisable for mission-critical systems. Overcurrent events can arise from shorts downstream or inductive kick during turn-off; thus, adding a fast-acting polyfuse or electronic circuit breaker provides an extra layer of defense. Additionally, monitoring the SW node slew rate or using a dedicated current-sense amplifier upstream can enable predictive fault detection before catastrophic failure occurs. Since the device can deliver up to 3.5A continuously, even brief overloads at higher currents could exceed package thermal limits despite internal protection, so derating based on ambient temperature and airflow remains essential.
How do environmental factors such as altitude or vibration affect long-term reliability of the LM76003RNPR in ruggedized embedded systems?
Operating the LM76003RNPR within its specified -40°C to +125°C junction temperature range ensures semiconductor integrity under thermal stress. However, altitude affects convective cooling, reducing heat dissipation capability and potentially pushing the die closer to Tj(max) under identical power losses. Vibration primarily impacts mechanical solder joints and nearby discrete components but has minimal direct effect on the IC itself unless severe PCB flexing induces cracking. Given its surface-mount QFN package with an exposed pad, proper thermal vias and robust land pattern design mitigate these risks. As long as the system maintains adequate airflow or heatsinking, and mechanical mounting avoids excessive stress concentration near the IC, the LM76003RNPR should exhibit robust performance in harsh environments.
Why would someone choose the LM76003RNPR over a simpler linear regulator despite its higher complexity and cost, particularly in automotive infotainment systems?
Linear regulators become impractical when the input-to-output differential exceeds a few volts at multi-amp loads due to excessive power dissipation. For instance, stepping down 12V to 3.3V at 3A results in 26W of waste heat in a linear solution, requiring large heatsinks or complex thermal management. The LM76003RNPR, operating in buck topology, dissipates only the conduction and switching losses—typically under 1W at similar conditions—making it far more efficient and thermally feasible. In automotive infotainment systems drawing several amps from a 12V rail, this efficiency advantage translates into reduced cooling needs, smaller PCB area, and longer battery life in hybrid/electric vehicles. Thus, despite added control circuitry and layout complexity, the buck converter delivers superior overall system economics and reliability.
What considerations apply when cascading the LM76003RNPR with another stage in a multi-rail power architecture, especially concerning stability and noise coupling?
Cascading regulators introduces inter-stage dynamics that can destabilize either stage if not carefully managed. The output impedance of the first stage acts as a load variation source for the second, potentially violating its minimum load requirement or triggering premature shutdown. Additionally, high-frequency ripple from the LM76003RNPR’s switch node may couple into the next stage’s input filter, degrading output purity. To mitigate this, designers should ensure sufficient spacing between stages, use low-ESR/ESL output capacitors, and possibly add LC filters at intermediate nodes. Stability analysis via simulation or prototype testing is strongly recommended, as compensation networks differ significantly between stages and simple datasheet guidelines rarely suffice for robust implementation.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments LM76003RNPR

Product Attribute LM76003QRNPRQ1 LM76005RNPR LM76002QRNPRQ1 LM76005HTQRNPRQ1
Part Number LM76003QRNPRQ1 LM76005RNPR LM76002QRNPRQ1 LM76005HTQRNPRQ1
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Voltage - Output (Min/Fixed) - - - -
Voltage - Output (Max) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Function - - - -
Voltage - Input (Min) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Output Type - Current - Unbuffered Voltage - Buffered -
Voltage - Input (Max) - - - -
Frequency - Switching - - - -
Topology - - - -
Synchronous Rectifier - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Number of Outputs - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current - Output - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output Configuration - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -

LM76003RNPR Datasheet PDF

Download LM76003RNPR pdf datasheets and Texas Instruments documentation for LM76003RNPR - Texas Instruments.

HTML Datasheet
LM76002, LM76003 Datasheet.pdf
PCN Design/Specification
LM7600y Datasheet Chg 15/Oct/2019.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • 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.

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LM76003RNPR Image

LM76003RNPR

Texas Instruments
32D-LM76003RNPR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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