SIMPLE SWITCHER®, 36V 2.5A Synchronous Step-Down Converter

SIMPLE SWITCHER®, 36V 2.5A Synchronous Step-Down Converter - LMR23625

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The LMR23625 SIMPLE SWITCHER® is an easy-to-use 36-V, 2.5-A synchronous step-down regulator. With a wide input range from 4 V to 36 V, the device is suitable for various industrial application for power conditioning from unregulated sources. Peak current-mode control is employed to achieve simple control-loop compensation and cycle-by-cycle current limiting. A quiescent current of 75 µA makes it suitable for battery-powered systems. An ultra-low 2 µA shutdown current can further prolong battery life. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components. The device has an option for fixed-frequency FPWM mode to achieve small output-voltage ripple at light load. An extended family for HSOIC is available in 1-A (LMR23610) and 3-A (LMR23630) load current options in pin-to-pin compatible packages which allows simple, optimum PCB layout. A precision enable input allows simplification of regulator control and system power sequencing. Protection features include cycle-by-cycle current limit, hiccup-mode short-circuit protection and thermal shutdown due to excessive power dissipation.


  • 4-V to 36-V Input Range
  • 2.5-A Continuous Output Current
  • Integrated Synchronous Rectification
  • Current Mode Control
  • Minimum Switch ON Time: 60 ns
  • 2.1-MHz Switching Frequency With PFM and Forced-PWM-Mode Options (HSOIC)
  • 2.1-MHz Switching Frequency With Forced-PWM Mode Only (WSON)
  • Frequency Synchronization to External Clock
  • Internal Compensation for Ease of Use
  • 75-µA Quiescent Current at No Load
  • Soft Start into a Prebiased Load
  • High Duty-Cycle Operation Supported
  • Precision Enable Input
  • Output Short-Circuit Protection With Hiccup Mode
  • Thermal Protection
  • 8-Pin HSOIC With PowerPAD™ Package
  • 12-Pin WSON Wettable Flanks Package with PowerPAD™
  • Create a Custom Design Using the LMR23625 With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable   
Current Mode   
-40 to 125   

Other qualified versions of LMR23625

Version Part Number Definition
Automotive LMR23625-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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WEBENCH® Designer LMR23625

  Min   Max Range
Vin  V 4.0 to 36.0V
Vout  V 1 to 28V
Iout  A ≤ 2.5A
Ambient Temp  °C -40 to 125°C

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