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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsLM5000SD-3
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LM5000SD-3 - Texas Instruments

Manufacturer Part Number
LM5000SD-3
Manufacturer
Texas Instruments
Allelco Part Number
32D-LM5000SD-3
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,070 pcs available, New & Original
Parts Description
IC REG MULTI CONFG ADJ 16WSON
Package
16-WSON (5x5)
Data sheet
LM5000SD-3.pdf

HTML Datasheet

LM5000.pdf
RoHs Status
 
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Specifications

LM5000SD-3 Tech Specifications
Texas Instruments - LM5000SD-3 technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - LM5000SD-3

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 3.1V
Voltage - Output (Max) 80V (Switch)
Voltage - Input (Min) 3.1V
Voltage - Input (Max) 40V
Topology Boost, Flyback, Forward Converter
Synchronous Rectifier No
Supplier Device Package 16-WSON (5x5)
Series -
Package / Case 16-WFDFN 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
Function Step-Up, Step-Up/Step-Down
Frequency - Switching 300kHz, 700kHz
Current - Output 1.35A (Switch)
Base Product Number LM5000

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

LM5000SD-3 Image
LM5000SD-3 (1)

Manufacturer Part Number

LM5000SD-3

Manufacturer

Texas Instruments

Introduction

High-performance, wide-input voltage range DC/DC switching regulator IC

Product Features and Performance

Wide input voltage range: 3.1V to 40V

Wide output voltage range: Up to 80V

35A output current capability

High efficiency up to 95%

Adjustable output voltage

Switching frequency options: 300kHz or 700kHz

Supports boost, flyback, and forward converter topologies

Thermal shutdown and current limit protection

Product Advantages

Allows for simple, compact, and efficient power supply designs

Wide range of input and output voltage options

High output current capability

Flexible switching frequency choices

Robust protection features

Key Technical Parameters

Input voltage range: 3.1V to 40V

Output voltage range: Up to 80V

Output current: 1.35A

Switching frequency: 300kHz or 700kHz

Topology: Boost, flyback, forward converter

Quality and Safety Features

Thermal shutdown protection

Current limit protection

Compatibility

Compatible with a wide range of applications requiring a high-performance, wide-input voltage range DC/DC converter

Application Areas

Industrial equipment

Telecom and networking equipment

Automotive electronics

Power tools

General purpose power supplies

Product Lifecycle

Active product, no discontinuation planned

Replacement/upgrade options available from Texas Instruments

Key Reasons to Choose This Product

Wide input and output voltage range for flexibility

High output current capability

Efficiency up to 95% for energy savings

Multiple switching frequency options for design optimization

Robust protection features for reliable operation

Compatibility with a wide range of applications

Frequently Asked Questions(FAQ)

How does the LM5000SD-3 compare to other members of the LM5000 series in terms of input voltage tolerance and switching frequency options?
The LM5000SD-3 offers a wide input voltage range from 3.1V to 40V, which is typical across the LM5000 family, but it specifically supports two fixed switching frequencies—300kHz and 700kHz—depending on configuration. While most variants maintain this broad input capability, differences in external component selection can influence efficiency and thermal performance at the upper end of the 40V input. Unlike some higher-voltage variants, this device does not support operation above 40V, making it suitable for industrial and automotive systems where transient protection is critical.
What are the key trade-offs when selecting the LM5000SD-3 for a high-efficiency boost converter design operating above 60V output?
When designing with the LM5000SD-3 to generate outputs greater than 60V, designers must balance inductor size, switching frequency, and duty cycle constraints. At higher output voltages, the peak switch current increases due to energy transfer requirements, which raises conduction losses in the internal MOSFET. Although the 700kHz switching option helps reduce passive component footprint, it also increases switching losses. Therefore, achieving high efficiency above 60V often requires careful optimization of the external inductor’s DC resistance and core material to minimize losses without compromising transient response.
Can the LM5000SD-3 be used in a flyback topology for isolated power delivery in a compact PCB layout?
Yes, the LM5000SD-3 supports flyback operation, making it viable for isolated power supplies in space-constrained applications. However, unlike dedicated flyback controllers, it lacks built-in secondary-side feedback or optocoupler compensation networks, so accurate regulation typically requires an auxiliary winding and a feedback circuit such as an optocoupler or shunt regulator. This increases bill-of-materials complexity compared to specialized isolated regulators but allows flexibility in transformer design and output voltage adjustment.
Why might the LM5000SD-3 exhibit reduced efficiency at light loads despite its adjustable switching frequency capability?
The LM5000SD-3 does not implement true pulse-skipping or variable-frequency modulation under light load; instead, it operates continuously unless externally configured for burst mode. Continuous conduction at low currents leads to higher fixed switching and gate-drive losses relative to output power. For applications sensitive to standby power consumption—such as battery-powered devices—designers may need to implement external techniques like forced discontinuous conduction or use a secondary controller that supports skip-cycle mode.
How does the LM5000SD-3 handle inrush current during hot insertion into a 36V system?
Upon hot insertion into a 36V input rail, the LM5000SD-3 does not have inherent soft-start or current-limiting features beyond basic undervoltage lockout. Without external soft-start capacitors or current-sense resistors, the inrush current surge can stress input capacitors and upstream circuitry. Designers should include input filtering with precharge circuits or series resistors and consider using bulk capacitance with current-limiting NTC thermistors to mitigate this risk, especially in automotive or industrial environments prone to voltage transients.
Is the LM5000SD-3 suitable for use in a forward converter configuration requiring tight output voltage accuracy?
While the LM5000SD-3 can operate in forward converter topology, its internal reference accuracy is specified within ±2% over temperature, which may not meet stringent industrial or precision instrumentation standards. Additionally, transformer coupling tolerances and leakage inductance introduce variability in output regulation. For applications demanding better than ±1% output accuracy, additional post-regulation via linear stages or digital feedback loops would be necessary, increasing system complexity and cost.
What precautions should be taken when routing signals near the exposed pad of the LM5000SD-3 package during PCB layout?
The 16-WSON (5x5) package with an exposed thermal pad requires careful attention to signal isolation and grounding. High-speed switching nodes connected to the SW pin should maintain short return paths directly under the exposed pad to minimize loop area and electromagnetic interference. Analog feedback traces should avoid crossing noisy switching loops, and the thermal pad must be solidly connected to a low-impedance ground plane to ensure effective heat dissipation and noise immunity.
How does the LM5000SD-3 compare to modern synchronous buck-boost controllers in terms of BOM cost and component count for non-isolated applications?
Compared to integrated synchronous buck-boost solutions like the LT8390 or TPS63020, the LM5000SD-3 typically results in a lower BOM cost due to its simpler architecture and lack of integrated rectification control. However, it requires more external components—including discrete diodes, inductors, and possibly snubber networks—especially when supporting bidirectional or wide-input-range operation. For non-isolated, unidirectional step-up/step-down needs, the LM5000SD-3 can offer a cost-effective solution, though newer devices provide superior efficiency and integration, reducing board space and assembly complexity.
What impact does operating the LM5000SD-3 near its maximum junction temperature have on reliability and long-term stability?
Operating near 125°C junction temperature accelerates electromigration and reduces mean time between failures, particularly in high-current or high-ambient environments. The device’s internal thermal shutdown activates around 165°C, but frequent excursions close to the absolute maximum can degrade bond wire integrity and semiconductor interfaces over time. Designers should ensure adequate airflow, copper area under the thermal pad, and derating of power dissipation to maintain safe operating margins and extend product lifespan.
Can the LM5000SD-3 replace a traditional PWM controller in a legacy industrial machine retrofit project?
Yes, the LM5000SD-3 is well-suited for retrofitting older industrial equipment due to its robust 40V input rating, wide output capability, and compatibility with standard discrete components. Its ability to drive external N-channel MOSFETs allows flexibility in selecting high-voltage switches appropriate for legacy transformer-based topologies. However, firmware or control logic changes may still be required to integrate with existing supervisory systems, depending on whether analog or digital feedback is used.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments LM5000SD-3

Product Attribute LM5000SDX-3 LM5000SDX-3/NOPB LM5000SDX-6 LM5000SDX-6/NOPB
Part Number LM5000SDX-3 LM5000SDX-3/NOPB LM5000SDX-6 LM5000SDX-6/NOPB
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Voltage - Input (Max) - - - -
Voltage - Input (Min) - - - -
Frequency - Switching - - - -
Number of Outputs - - - -
Voltage - Output (Min/Fixed) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Current - Output - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Output (Max) - - - -
Function - - - -
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Synchronous Rectifier - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output Configuration - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Topology - - - -

LM5000SD-3 Datasheet PDF

Download LM5000SD-3 pdf datasheets and Texas Instruments documentation for LM5000SD-3 - Texas Instruments.

HTML Datasheet
LM5000.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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In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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LM5000SD-3 Image

LM5000SD-3

Texas Instruments
32D-LM5000SD-3

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