LM5069MM-2+ National Semiconductor, LM5069MM-2+ Datasheet

LM5069MM-2+

Manufacturer Part Number

LM5069MM-2+

Description

Manufacturer

National Semiconductor

Datasheet

1.LM5069MM-2.pdf (22 pages)

Specifications of LM5069MM-2+

Notes

NEW

Date_code

10+

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LM5069

Positive High Voltage Hot Swap / Inrush Current

Controller with Power Limiting

General Description

The LM5069 positive hot swap controller provides intelligent

control of the power supply connections during insertion and

removal of circuit cards from a live system backplane or

other "hot" power sources. The LM5069 provides in-rush

current control to limit system voltage droop and transients.

The current limit and power dissipation in the external series

pass N-Channel MOSFET are programmable, ensuring op-

eration within the Safe Operating Area (SOA). The POWER

GOOD output indicates when the output voltage is within

1.25V of the input voltage. The input under-voltage and

over-voltage lockout levels and hysteresis are program-

mable, as well as the initial insertion delay time and fault

detection time. The LM5069-1 latches off after a fault detec-

tion, while the LM5069-2 automatically restarts at a fixed

duty cycle. The LM5069 is available in a 10 pin MSOP

package.

Features

n Wide operating range: +9V to +80V

n In-rush current limit for safe board insertion into live

n Programmable maximum power dissipation in the

Typical Application

power sources

external pass device

DS201972

Positive Power Supply Control

n Adjustable current limit

n Circuit breaker function for severe over-current events

n Internal high side charge pump and gate driver for

n Adjustable under-voltage lockout (UVLO) and hysteresis

n Adjustable over-voltage lockout (OVLO) and hysteresis

n Initial insertion timer allows ringing and transients to

n Programmable fault timer avoids nuisance trips

n Active high open drain POWER GOOD output

n Available in latched fault and automatic restart versions

Applications

n Server Backplane Systems

n Base Station Power Distribution Systems

n Solid State Circuit Breaker

n 24V/48V Industrial Systems

Package

n MSOP-10

external N-channel MOSFET

subside after system connection

20197201

September 2006

www.national.com

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