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DC/DC Cntrlr Single-OUT Step Down 20A 750kHz Automotive 20-Pin HTSSOP EP Tube

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LM25117QPMH/NOPB General Description

The LM25117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications.

The operating frequency is programmable from 50 kHz to 750 kHz. The LM25117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM25117’s unique analog telemetry feature provides average output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.

Texas Instruments, Inc Inventory

Key Features

  • LM25117-Q1 is Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range
  • Emulated Peak Current Mode Control
  • Wide Operating Range from 4.5 V to 42 V
  • Robust 3.3 A Peak Gate Drives
  • Adaptive Dead-time Output Driver Control
  • Free-run or Synchronizable Clock up to 750 kHz
  • Optional Diode Emulation Mode
  • Programmable Output from 0.8 V
  • Precision 1.5% Voltage Reference
  • Analog Current Monitor
  • Programmable Current Limit
  • Hiccup Mode Over Current Protection
  • Programmable Soft-start and Tracking
  • Programmable Line Undervoltage Lockout
  • Programmable Switch-over to External Bias Supply
  • Thermal Shutdown
Texas Instruments, Inc Original Stock
Texas Instruments, Inc Inventory


Vin (min) (V) 4.5 Vin (max) (V) 42
Vout (min) (V) 0.8 Vout (max) (V) 41
Iout (max) (A) 20 Iq (typ) (mA) 4.8
Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 750
Features Adjustable current limit, Enable, Frequency synchronization, Light Load Efficiency, Synchronous Rectification, Tracking, UVLO adjustable Operating temperature range (°C) -40 to 125
Regulated outputs (#) 1 Number of phases 1
Rating Automotive Control mode current mode
Type Controller feature-topology Step Down
feature-number-of-outputs 1 feature-output-voltage-v 0.8 to 41
feature-minimum-output-current-a feature-maximum-output-current-a 20
feature-minimum-input-voltage-v 4.5 feature-maximum-switching-frequency-khz 750
feature-maximum-input-voltage-v 42 feature-operating-supply-voltage-v 4.5 to 42
feature-maximum-supply-current-ma 5.8(Typ) feature-maximum-power-dissipation-mw
feature-minimum-switching-frequency-khz 50 feature-synchronous-rectifier Yes
feature-synchronous-clock Yes feature-packaging Tube
feature-rad-hard feature-pin-count 20
feature-supplier-package HTSSOP EP feature-standard-package-name1 SOP
feature-cecc-qualified No feature-esd-protection Yes
feature-military No feature-aec-qualified Yes
feature-aec-qualified-number AEC-Q100 feature-auto-motive Yes
feature-p-pap Yes feature-eccn-code EAR99
feature-svhc No


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The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


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Buying Guide

  • What is the lifespan of LM25117QPMH/NOPB?

    The lifespan of LM25117QPMH/NOPB depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of LM25117QPMH/NOPB?

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