LM5005

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SNVS397C – SEPTEMBER 2005 – REVISED MARCH 2007

LM5005 High Voltage 2.5 Amp Buck Regulator

Check for Samples: LM5005

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FEATURES

DESCRIPTION

The LM5005 high voltage switching regulator features

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Integrated 75V, 2.5A N-Channel Buck Switch

all of the functions necessary to implement an

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Ultra-wide input voltage range from 7V to 75V

efficient high voltage buck regulator using a minimum

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Internal high voltage bias regulator

of external components. This easy to use regulator

includes a 75V N-Channel buck switch with an output

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Adjustable output voltage from 1.225V

current capability of 2.5 Amps. The regulator control

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1.5% feedback reference accuracy

method is based upon current mode control utilizing

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Current mode control with emulated inductor

an emulated current ramp. Current mode control

current ramp

provides inherent line feed-forward, cycle-by-cycle

current limiting and ease of loop compensation. The

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Single resistor oscillator frequency setting

use of an emulated control ramp reduces noise

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Oscillator synchronization input

sensitivity of the pulse-width modulation circuit,

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Programmable soft-start

allowing reliable control of very small duty cycles

necessary in high input voltage applications. The

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Shutdown / Standby input

operating frequency is programmable from 50kHz to

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Wide bandwidth error amplifier

500kHz. An oscillator synchronization pin allows

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Thermal Shutdown

multiple LM5005 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.

Package

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HTSSOP (Exposed Pad)

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PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.