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LM25005MH Datasheet

  • LM25005MH

  • National Semiconductor [42V, 2.5A STEP-DOWN SWITCHING REGUL...

  • 770.54KB

  • NSC

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LM25005 42V, 2.5A Step-Down Switching Regulator
March 2006
LM25005
42V, 2.5A Step-Down Switching Regulator
General Description
The LM25005 switching regulator features all of the functions
necessary to implement an efficient, high voltage buck regu-
lator using a minimum of external components. This easy to
use regulator includes a 42V, 160m鈩? 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 in-
herent line voltage feed-forward, cycle-by-cycle current limit-
ing and ease of loop compensation. The use of an emulated
control ramp reduces noise sensitivity of the pulse-width mod-
ulation circuit, allowing reliable control of very small duty
cycles necessary in high input voltage applications. The op-
erating frequency is programmable from 50kHz to 500kHz.
An oscillator synchronization pin allows multiple LM25005
regulators to self-synchronize or to be synchronized to an ex-
ternal clock. Additional protection features include: current
limit, thermal shutdown and remote shutdown capability. The
device is available in a power enhanced TSSOP-20 package
featuring an exposed die attach pad to aid thermal dissipation.
Features
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Integrated 42V, 160m鈩?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
Package
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TSSOP-20EP (Exposed Pad)
Simplified Application Schematic
20170001
漏 2007 National Semiconductor Corporation
201700
www.national.com

LM25005MH 产品属性

  • National Semiconductor (TI)

  • 1.225 V to 40 V

  • 2.5 A

  • 50 KHz to 500 KHz

  • SMD/SMT

  • TSSOP EP

  • Tube

  • 1

  • 73

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