Product details

Vin (Min) (V) 7 Vin (Max) (V) 42 Vout (Min) (V) 1.23 Vout (Max) (V) 37 Iout (Max) (A) 2.5 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 500 Features Enable, Frequency Synchronization, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
Vin (Min) (V) 7 Vin (Max) (V) 42 Vout (Min) (V) 1.23 Vout (Max) (V) 37 Iout (Max) (A) 2.5 Iq (Typ) (uA) 3000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 500 Features Enable, Frequency Synchronization, Over Current Protection Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1
HTSSOP (PWP) 20 42 mm² 6.5 x 6.4
  • Integrated 42V, 160mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range from 7V to 42V
  • Internal Bias Regulator
  • Adjustable Output Voltage from 1.225V
  • 1.5% Feedback Reference Accuracy
  • Current Mode Control with Emulated Inductor Current Ramp
  • Single Resistor Oscillator Frequency Setting
  • Oscillator Synchronization Input
  • Programmable Soft-Start
  • Shutdown / Standby Input
  • Wide Bandwidth Error Amplifier
  • Thermal Shutdown

All trademarks are the property of their respective owners.

  • Integrated 42V, 160mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range from 7V to 42V
  • Internal Bias Regulator
  • Adjustable Output Voltage from 1.225V
  • 1.5% Feedback Reference Accuracy
  • Current Mode Control with Emulated Inductor Current Ramp
  • Single Resistor Oscillator Frequency Setting
  • Oscillator Synchronization Input
  • Programmable Soft-Start
  • Shutdown / Standby Input
  • Wide Bandwidth Error Amplifier
  • Thermal Shutdown

All trademarks are the property of their respective owners.

The LM25005 switching regulator features all of the functions necessary to implement an efficient, high voltage buck regulator using a minimum of external components. This easy to use regulator includes a 42V, 160mΩ, N-channel MOSFET, with an output current capability of 2.5 Amps. The regulator control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line voltage 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 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM25005 regulators to self-synchronize or to be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shutdown capability. The device is available in a power enhanced HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

The LM25005 switching regulator features all of the functions necessary to implement an efficient, high voltage buck regulator using a minimum of external components. This easy to use regulator includes a 42V, 160mΩ, N-channel MOSFET, with an output current capability of 2.5 Amps. The regulator control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line voltage 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 50kHz to 500kHz. An oscillator synchronization pin allows multiple LM25005 regulators to self-synchronize or to be synchronized to an external clock. Additional protection features include: current limit, thermal shutdown and remote shutdown capability. The device is available in a power enhanced HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.

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Type Title Date
* Data sheet LM25005 42V, 2.5A Step-Down Switching Regulator datasheet (Rev. C) 20 Mar 2013
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 03 Jul 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
White paper Buck regulator topologies for wide input/output voltage differentials (Rev. A) 15 Sep 2016
User guide AN-1749 LM25005 Evaluation Board (Rev. A) 24 Apr 2013

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