Power

Good

UVLO

OVLO

PWR

GND

TIMER

PGD

OUT

VIN

SENSE GATE

LM5069

LM5069

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SNVS452D – SEPTEMBER 2006 – REVISED MAY 2013

LM5069 Positive High Voltage Hot Swap / Inrush Current Controller with Power Limiting

Check for Samples: LM5069

1

FEATURES

APPLICATIONS

2

•

Wide Operating Range: +9V to +80V

•

Server Backplane Systems

•

In-rush Current Limit for Safe Board Insertion

•

Base Station Power Distribution Systems

into Live Power Sources

•

Solid State Circuit Breaker

•

Programmable Maximum Power Dissipation in

•

24V/48V Industrial Systems

the External Pass Device

•

Adjustable Current Limit

PACKAGE

•

Circuit Breaker Function for Severe Over-

•

VSSOP-10

Current Events

DESCRIPTION

•

Internal High Side Charge Pump and Gate

Driver for External N-channel MOSFET

The LM5069 positive hot swap controller provides

intelligent control of the power supply connections

•

Adjustable Under-Voltage Lockout (UVLO) and

during insertion and removal of circuit cards from a

Hysteresis

live system backplane or other "hot" power sources.

•

Adjustable Over-Voltage Lockout (OVLO) and

The LM5069 provides in-rush current control to limit

Hysteresis

system voltage droop and transients. The current limit

and power dissipation in the external series pass N-

•

Initial Insertion Timer Allows Ringing and

Channel

MOSFET

are

programmable,

ensuring

Transients to Subside after System

operation within the Safe Operating Area (SOA). The

Connection

POWER GOOD output indicates when the output

•

Programmable Fault Timer Avoids Nuisance

voltage is within 1.25V of the input voltage. The input

Trips

under-voltage and over-voltage lockout levels and

•

Active High Open Drain POWER GOOD Output

hysteresis are programmable, as well as the initial

insertion delay time and fault detection time. The

•

Available in Latched Fault and Automatic

LM5069-1 latches off after a fault detection, while the

Restart Versions

LM5069-2 automatically restarts at a fixed duty cycle.

The LM5069 is available in a 10 pin VSSOP package.

TYPICAL APPLICATION

Figure 1. Positive Power Supply Control

1

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2013, 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.