High Voltage (30V, 1.25A) Step Down Switching Regulator


Product details


Vin (Min) (V) 8 Vin (Max) (V) 30 Vout (Min) (V) 2.5 Vout (Max) (V) 24 Iout (Max) (A) 1.25 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 45 Switching frequency (Max) (kHz) 750 Features Enable, Over Current Protection, UVLO Fixed Control mode Constant on-time (COT) Duty cycle (Max) (%) 94 Type Converter Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 WSON (DPR) 10 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)


  • Integrated 33V, N-Channel Buck Switch
  • Integrated Start-Up Regulator
  • Input Voltage Range: 8V to 30V
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Operating Frequency Remains Constant with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Start-Up
  • Adjustable Output Voltage
  • Valley Current Limit At 1.25A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown


  • 10-Pin WSON (4 mm x 4 mm)
  • 14-Pin HTSSOP
  • Exposed Thermal Pad For Improved Heat Dissipation

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Typical Applications

  • High Efficiency Point-Of-Load (POL) Regulator
  • Non-Isolated Telecommunication Buck Regulator
  • Secondary High Voltage Post Regulator
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The LM2695 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 1.25A to the load. This buck regulator contains a 33V N-Channel Buck Switch, and is available in the thermally enhanced WSON-10 and HTSSOP-14 packages. The hysteretic regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
LMR23615 ACTIVE SIMPLE SWITCHER®, 36-V, 1.5-A Synchronous Step-Down Converter Next-generation 36-V, 1.5-A synchronous step-down converter.

Technical documentation

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Type Title Date
* Datasheet LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator datasheet (Rev. A) Apr. 03, 2013
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides AN-1444 LM2695 Evaluation Board (Rev. A) Apr. 24, 2013

Design & development

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Hardware development

document-generic User guide

LM2695 High Voltage (30V, 1.25A) Step Down Switching Regulator

  • Integrated 33V, N-Channel buck switch
  • Integrated start-up regulator
  • Input voltage range: 8V to 30V
  • No loop compensation required
  • Ultra-Fast transient response
  • Operating frequency remains constant with load current and input voltage
  • Maximum Duty Cycle limited during start-up
  • Adjustable output voltage
  • Valley (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 14 View options
WSON (DPR) 10 View options

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