SIMPLE SWITCHER®, 36V, 1.5A Synchronous Step-Down Converter

SIMPLE SWITCHER®, 36V, 1.5A Synchronous Step-Down Converter - LMR23615


The LMR23615 SIMPLE SWITCHER® is an easy-to-use 36-V, 1.5-A synchronous step-down regulator. With a wide input range from 4 V to 36 V, the device is suitable for various industrial applications 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 the device 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 and also minimizes the external components needed. An extended family is available in 2.5-A (LMR23625) and 3-A (LMR23630) load-current options in pin-to-pin compatible packages, allowing 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
  • 1.5-A Continuous Output Current
  • Integrated Synchronous Rectification
  • Current-Mode Control with internal compensation
  • Minimum Switch ON-Time: 60 ns
  • Adjustable Switching Frequency
  • PFM Mode at Light Load
  • Frequency Synchronization to External Clock
  • 75-µA Quiescent Current
  • Soft Start into a Prebiased Load
  • High-Duty-Cycle Operation Supported
  • Output Short-Circuit Protection With Hiccup Mode
  • Thermal Protection
  • 12-Pin WSON Wettable Flanks Package With PowerPAD™
  • Create a Custom Design Using the LMR23615 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 LMR23615

Version Part Number Definition
Automotive LMR23615-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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WEBENCH® Designer LMR23615

  Min   Max Range
Vin  V 4.0 to 36.0V
Vout  V 1 to 28V
Iout  A ≤ 1.5A
Ambient Temp  °C -40 to 125°C

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