19-3443; Rev 3; 4/10

1V to 13.2V, n-Channel Hot-Swap Controllers

Require No Sense Resistor

N

MAX5925

MAX5926

SC_DET

GND

REMOVABLE CARD

2.25V TO 13.2V

BACKPLANE

CB

SENSE

GATE

GND

OUT

SEE FIGURE 1 FOR A DETAILED TYPICAL OPERATING CIRCUIT WITHOUT RSENSE.

General Description

The MAX5924/MAX5925/MAX5926 1V to 13.2V hot-swap

controllers allow the safe insertion and removal of circuit

cards into live backplanes. These devices hot swap sup-

plies ranging from 1V to 13.2V provided that the device

The MAX5924/MAX5925/MAX5926 hot-swap controllers

limit the inrush current to the load and provide a circuit-

breaker function for overcurrent protection. The devices

operate with or without a sense resistor. When operat-

ing without a sense resistor, load-probing circuitry

ensures a short circuit is not present during startup,

then gradually turns on the external MOSFET. After the

load probing is complete, on-chip comparators provide

overcurrent protection by monitoring the voltage drop

across the external MOSFET on-resistance. In the event

of a fault condition, the load is disconnected.

The MAX5924/MAX5925/MAX5926 include many inte-

grated features that reduce component count and

design time, including configurable turn-on voltage,

slew rate, and circuit-breaker threshold. An on-board

charge pump provides the gate drive for a low-cost,

external n-channel MOSFET.

The MAX5924/MAX5925/MAX5926 are available with

open-drain PGOOD and/or PGOOD outputs. The

MAX5925/MAX5926 also feature a circuit breaker with

MAX5926 features a selectable 0ppm/°C or 3300ppm/°C

temperature coefficient. The MAX5924 temperature coef-

ficient is 0ppm/°C and the MAX5925 temperature coeffi-

cient is 3300ppm/°C. Autoretry and latched fault-

management configurations are available (see the

Selector Guide).

Applications

Base Stations

RAID

Remote-Access Servers

Network Routers and Switches

Servers

Portable Device Bays

Features

o Drive High-Side n-Channel MOSFET

o Protected During Turn-On into Shorted Load

o Adjustable Circuit-Breaker Threshold

o Programmable Slew-Rate Control

o Programmable Turn-On Voltage

o Autoretry or Latched Fault Management

________________________________________________________________

Maxim Integrated Products

1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Typical Operating Circuits

Ordering Information

EVALUATION

KIT

AVAILABLE

Selector Guide appears at end of data sheet.

Pin Configurations appear at end of data sheet.

PART

TEMP RANGE

PIN-PACKAGE

MAX5924AEUB

-40°C to +85°C

10 µMAX

MAX5924BEUB

-40°C to +85°C

10 µMAX

MAX5924CEUB*

-40°C to +85°C

10 µMAX

MAX5924DEUB*

-40°C to +85°C

10 µMAX

MAX5925AEUB

-40°C to +85°C

10 µMAX

MAX5925BEUB*

-40°C to +85°C

10 µMAX

MAX5925CEUB*

-40°C to +85°C

10 µMAX

MAX5925DEUB*

-40°C to +85°C

10 µMAX

MAX5926EEE

-40°C to +85°C

16 QSOP–EP**

Typical Operating Circuits continued at end of data sheet.

*

Future product—contact factory for availability.

**

EP = Exposed pad.

µMAX is a registered trademark of Maxim Integrated Products, Inc.