Power

Good

UVLO/EN

PWR

GND

TIMER

PGD

OUT

VIN

SENSE GATE

LM25061

FB

GND

LM25061

www.ti.com

SNVS611E – FEBRUARY 2011 – REVISED MARCH 2013

LM25061 Positive Low Voltage Power Limiting Hot Swap Controller

Check for Samples: LM25061

1

FEATURES

APPLICATIONS

2

•

Operating Range: +2.9V to +17V

•

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

the External Pass Device

PACKAGE

•

Adjustable Current Limit

•

VSSOP-10

•

Circuit Breaker Function for Severe Over-

DESCRIPTION

Current Events

The LM25061 positive hot swap controller provides

•

Internal High Side Charge Pump and Gate

intelligent control of the power supply voltage to the

Driver for External N-Channel MOSFET

load during insertion and removal of circuit cards from

•

Adjustable Under-Voltage Lockout (UVLO) and

a live system backplane or other "hot" power sources.

Hysteresis

The LM25061 provides in-rush current control to limit

•

Adjustable Output Voltage Monitoring and

system voltage droop and transients. The current limit

and power dissipation in the external series pass N-

Hysteresis

Channel

MOSFET

are

programmable,

ensuring

•

Initial Insertion Timer Allows Ringing and

operation within the Safe Operating Area (SOA). The

Transients to Subside After System

POWER GOOD output indicates when the output

Connection

voltage exceeds a programmable threshold. The

•

Programmable Fault Timer Avoids Nuisance

input

under-voltage

level

and

hysteresis

are

Trips

programmable, as well as the initial insertion delay

time and fault detection time. The LM25061-1 latches

•

Active High Open Drain POWER GOOD Output

off after a fault detection, while the LM25061-2

•

Available in Latched Fault and Automatic

automatically restarts at a fixed duty cycle. The

Restart Versions

LM25061 is available in a 10 pin VSSOP package.

Typical Application

Figure 1. Positive Power Supply Control

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2013, 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.