Product details


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Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new Find other Buck converters (integrated switch)


  • LM26003-Q1 is an Automotive-Grade Product
    That is AEC-Q100 Grade 1 Qualified (–40°C to
    +125°C Operating Junction Temperature)
  • High-Efficiency Sleep Mode
  • 40-µA Typical Iq in Sleep Mode
  • 10.8-µA Typical Iq in Shutdown Mode
  • 3.0-V Minimum Input Voltage
  • 4.0-V to 38-V Continuous Input Range
  • 1.5% Reference Accuracy
  • Cycle-by-Cycle Current Limit
  • Adjustable Frequency (150 kHz to 500 kHz)
  • Synchronizable to an External Clock
  • Power Good Flag
  • Forced PWM Function
  • Adjustable Soft-Start
  • 20-Pin HTSSOP Package
  • Thermal Shut Down
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The LM26003 is a switching regulator designed for the high-efficiency requirements of applications with standby modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10.8 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode.

The LM26003 device can deliver up to 3 A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0 V to 38 V and can operate with input voltages as low as 3 V during line transients.

Operating frequency is adjustable from 150 kHz to 500 kHz with a single resistor and can be synchronized to an external clock.

Other features include Power Good, adjustable soft-start, enable pin, input undervoltage protection, and an internal bootstrap diode for reduced component count.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet LM26003-xx 3-A Switching Regulator With High Efficiency Sleep Mode datasheet (Rev. F) Feb. 06, 2015
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Design an automotive cluster power supply Oct. 15, 2015
Technical articles Spread Spectrum: Headache tablet or vitamin pill? May 18, 2015
Technical articles Start/Stop and Cold Crank Applications Jan. 06, 2015
User guides AN-1884 LM26003 Evaluation Board (Rev. B) Apr. 24, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The LM26003 evaluation board is designed to demonstrate the capabilities of the LM26003 switching regulator. The LM26003 eval board can be configured to provide an output of 3.3V at up to 3A from the input range of 4V to 38V. The nominal operating frequency is 300kHz and can be synchronized from (...)

Design tools & simulation

SNVM185.ZIP (57 KB) - PSpice Model
SNVM874.ZIP (1 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

CISPR 25 Class 5 Rated Multi-Output Power Supply with Pre-Boost for Automotive Cluster Unit
PMP9477 The PMP9477 design is a conducted EMI optimized multi-output power supply for automotive cluster units.  The power supply has a pre-boost stage for cold crank and start-stop operation and two buck regulators.  The pre-boost stage features the LM3481 boost controller and will start to (...)
document-generic Schematic document-generic User guide
CISPR 25 Class 5 Rated 14W Multi-Output Power Supply for Automotive Cluster Unit Reference Design
PMP9458 The PMP9458 reference design is a conducted EMI optimized 2-layer board power supply for automotive cluster units. The power supply has two buck regulators in cascaded connection: the first stage buck generates a 5V, 2A output using the LM26003, and the second stage generates two outputs of 2.8V (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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HTSSOP (PWP) 20 View options

Ordering & quality

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