Product details

Vin (Min) (V) 3.8 Vin (Max) (V) 42 Vout (Min) (V) 1.5 Vout (Max) (V) 15 Iout (Max) (A) 30 Iq (Typ) (uA) 35 Switching frequency (Min) (kHz) 350 Switching frequency (Max) (kHz) 2600 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 3.8 Vin (Max) (V) 42 Vout (Min) (V) 1.5 Vout (Max) (V) 15 Iout (Max) (A) 30 Iq (Typ) (uA) 35 Switching frequency (Min) (kHz) 350 Switching frequency (Max) (kHz) 2600 Features Adjustable Current Limit, Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Fixed Operating temperature range (C) -40 to 125 Regulated outputs (#) 1 Number of phases 1 Rating Catalog
VQFN (RGE) 24 16 mm² 4 x 4
  • –40°C to +125°C Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 45 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 15 V with ±0.8% Accuracy
  • Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75 mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power Good Indication Output
  • Selectable Diode Emulation or Forced Pulse Width Modulation
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer
  • –40°C to +125°C Ambient Operating Temperature Range
  • An AEC-Q100 Qualified Device is Available
  • VIN 3.8 V to 45 V (47 V Absolute Maximum)
  • Output: Fixed 3.3 V, 5 V, or Adjustable From
    1.5 V - 15 V with ±0.8% Accuracy
  • Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
  • High-Side and Low-Side Gate Drive With Slew Rate Control
  • Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
  • Optional Synchronization to an External Clock
  • Optional Spread Spectrum
  • Shutdown Mode IQ: 10 µA Typical
  • Low Standby Mode IQ: 35 µA Typical
  • 75 mV Current Limit Threshold with ±0.9% Accuracy
  • External Resistor or DCR Current Sensing
  • Output Enable Logic Input
  • Hiccup Mode for Sustained Overload
  • Power Good Indication Output
  • Selectable Diode Emulation or Forced Pulse Width Modulation
  • QFN-24 Package with Wettable Flanks
  • Create a Custom Design Using the LM25141 With the WEBENCH® Power Designer

The LM25141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141 features slew rate control to simplify the compliance with EMI requirements.

The LM25141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with slew rate control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

The LM25141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141 features slew rate control to simplify the compliance with EMI requirements.

The LM25141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with slew rate control that can be adjusted to reduce EMI.

In light or no-load conditions, the LM25141 operates in skip cycle mode for improved low power efficiency. The LM25141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.

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Technical documentation

Design & development

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Evaluation board

LM5141QRGEVM — LM5141QRG Synchronous Buck Converter Evaluation Module

The LM5141QRGEVM evaluation board provides a fully functional buck power supply, employing peak current mode control. The evaluation board provides a 5.0V @ 5A. The nonomal input voltage range is 8V-18V.
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Limit: 5
Simulation model

LM5141-Q1 and LM25141-Q1 PSpice Transient Model (Rev. A)

SNVMAU4A.ZIP (123 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

LM25141DESIGN-CALC — LM25141-Q1 controller quickstart design tool

Welcome to the LM25141-Q1 quickstart calculator design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM25141-Q1 42-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an (...)
Calculation tool

LM25141-Q1 Quickstart Design Calculator Tool (Rev. A)

SNVC236A.ZIP (1689 KB)
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VQFN (RGE) 24 View options

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