LM25005

ACTIVE

7-42V Wide Vin, 2.5A, Current Mode Non-Synchronous Buck Regulator

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 7 Vin (max) (V) 42 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Frequency synchronization, Over Current Protection Control mode current mode Vout (min) (V) 1.23 Vout (max) (V) 37 Iq (typ) (µA) 3000 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2.5 Vin (min) (V) 7 Vin (max) (V) 42 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Features Enable, Frequency synchronization, Over Current Protection Control mode current mode Vout (min) (V) 1.23 Vout (max) (V) 37 Iq (typ) (µA) 3000 Duty cycle (max) (%) 98
HTSSOP (PWP) 20 41.6 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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Technical documentation

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Type Title Date
* Data sheet LM25005 42V, 2.5A Step-Down Switching Regulator datasheet (Rev. C) 20 Mar 2013
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
EVM User's guide AN-1749 LM25005 Evaluation Board (Rev. A) 24 Apr 2013

Design & development

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LM5005 PSpice Transient Model

SNVMAB6.ZIP (256 KB) - PSpice Model
Simulation model

LM5005 Unencrypted PSpice Transient Model

SNVMAL0.ZIP (4 KB) - PSpice Model
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HTSSOP (PWP) 20 Ultra Librarian

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