LM5067 Negative Hot Swap / Inrush Current Controller with Power Limiting

1 Features

• Wide operating range: –9 V to –80 V

• In-rush current limit for safe board insertion into

live power sources

• Programmable maximum power dissipation in the

external pass device

• Adjustable current limit

• Circuit breaker function for severe overcurrent

events

• Adjustable undervoltage lockout (UVLO) and

hysteresis

• Adjustable overvoltage lockout (OVLO) and

hysteresis

• Initial insertion timer allows ringing and transients

to subside after system connection

• Programmable fault timer avoids nuisance trips

• Active high open drain POWER GOOD output

• Available in latched fault and automatic restart

versions

2 Applications

• Server backplane systems

• In-Rush current limiting

• Solid state circuit breaker

• Transient voltage protector

• Solid state relay

• Undervoltage lock-out

• Power good detector and indicator

3 Description

The LM5067 negative 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 LM5067 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

operation within the Safe Operating Area (SOA). In

addition, the LM5067 provides circuit protection by

monitoring for over-current and over-voltage

conditions. The POWER GOOD output indicates

when the output voltage is close to the input voltage.

The input under-voltage and over-voltage lockout

levels and hysteresis are programmable, as well as

the fault detection time. The LM5067-1 latches off

after a fault detection, while the LM5067-2

automatically attempts restarts at a fixed duty cycle.

The LM5067 is available in a 10-pin VSSOP package

and a 14-pin SOIC package.

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM5067

VSSOP (10)

3.00 mm x 3.00 mm

SOIC (14)

8.99 mm x 7.49 mm

(1)

For all available packages, see the orderable addendum at

the end of the datasheet.

GND

VCC

VEE

SENSE

TIMER

UVLO/EN

GATE

OVLO

PGD

LM5067

PWR

OUT

LOAD

Q 1

- 48V

Copyright © 2016, Texas Instruments Incorporated

Negative Power Bus In-Rush and Fault Protection

www.ti.com

LM5067

SNVS532D – OCTOBER 2007 – REVISED AUGUST 2020

Copyright © 2020 Texas Instruments Incorporated

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LM5067

SNVS532D – OCTOBER 2007 – REVISED AUGUST 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.