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LM5005MHX Datasheet

  • LM5005MHX

  • High Voltage 2.5 Amp Buck Regulator

  • 771.91KB

  • 21頁

  • NSC

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LM5005 High Voltage 2.5 Amp Buck Regulator
September 2005
LM5005
High Voltage 2.5 Amp Buck Regulator
General Description
The LM5005 high voltage switching regulator features all of
the functions necessary to implement an efficient high volt-
age buck regulator using a minimum of external compo-
nents. This easy to use regulator includes a 75V N-Channel
buck switch 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 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 appli-
cations. The operating frequency is programmable from
50kHz to 500kHz. An oscillator synchronization pin allows
multiple LM5005 regulators to self-synchronize or to be syn-
chronized to an external clock. Additional protection features
include: current limit, thermal shutdown and remote shut-
down 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 75V, 2.5A N-Channel Buck Switch
Ultra-wide input voltage range from 7V to 75V
Internal high voltage 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
20161901
漏 2005 National Semiconductor Corporation
DS201619
www.national.com

LM5005MHX 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 1.225 V to 70 V

  • 2.5 A

  • 50 KHz to 500 KHz

  • SMD/SMT

  • TSSOP EP

  • Reel

  • 1

  • 2500

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