EVALUATION KIT AVAILABLE
MAX5924/MAX5925/
MAX5926
1V to 13.2V, n-Channel Hot-Swap Controllers
Require No Sense Resistor
General Description
Benefits and Features
● Hot Swap 1V to 13.2V with V
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 supplies
ranging from 1V to 13.2V provided that the device supply
≥ 2.25V
CC
● Drive High-Side nMOSFET
● Operation With or Without R
SENSE
● Temperature-Compensated R
Sensing
voltage, V , is at or above 2.25V and the hot-swapped
DS(ON)
CC
supply, V , does not exceed V
.
S
CC
● Protected During Turn-On into Shorted Load
● Adjustable Circuit-Breaker Threshold
● Programmable Slew-Rate Control
● Programmable Turn-On Voltage
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 operating
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.
● Autoretry or Latched Fault Management
®
● 10-Pin μMAX or 16-Pin QSOP Packages
Typical Operating Circuits
TYPICAL OPERATION WITHOUT R
SENSE
BACKPLANE
REMOVABLE CARD
N
V
OUT
1V TO V
CC
The devices include many integrated 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 nMOSFET.
V
S
2.25V TO 13.2V
V
CC
R
CB
R
SC
OUT
CB
GATE SENSE
SC_DET
V
The MAX5924/MAX5925/MAX5926 are available with
open-drain PGOOD and/or PGOOD outputs. The
MAX5925/MAX5926 also feature a circuit breaker
CC
MAX5925
MAX5926
GND
GND
with temperature-compensated R
sensing. The
DS(ON)
MAX5926 features a selectable 0ppm/°C or 3300ppm/°C
temperature coefficient. The MAX5924 temperature
coefficient is 0ppm/°C and the MAX5925 temperature
coefficient is 3300ppm/°C. Autoretry and latched fault-
management configurations are available (see the
Selector Guide).
SEE FIGURE 1 FOR A DETAILED TYPICAL OPERATING CIRCUIT WITHOUT R
.
SENSE
TYPICAL OPERATION WITH R
SENSE
BACKPLANE
REMOVABLE CARD
R
SENSE
N
V
1V TO V
OUT
CC
V
S
2.25V TO 13.2V
V
CC
Applications
R
CB
● Base Stations
● RAID
CB
OUT
SENSE GATE
● Remote-Access Servers
● Network Routers and Switches
● Servers
V
CC
MAX5924
MAX5926
GND
GND
● Portable Device Bays
μMAX is a registered trademark of Maxim Integrated Products, Inc.
SEE FIGURE 2 FOR A DETAILED TYPICAL OPERATING CIRCUIT WITH R
.
SENSE
Selector Guide and Ordering Information appears at end of
data sheet.
19-3443; Rev 4; 1/16