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MAX5903LBETT+T

P1-P3P4-P6P7-P9P10-P12P13-P14
MAX5902/MAX5903
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
________________________________________________________________ Maxim Integrated Products 1
19-1988; Rev 3; 1/07
General Description
The MAX5902/MAX5903 are hot-swap controllers that
allow a circuit card to be safely hot plugged into a live
backplane without causing a glitch on the power-sup-
ply rail. These devices operate from +9V to +72V and
provide the simplest hot-swap solution by eliminating all
external components except the external p-channel
MOSFET.
The MAX5902/MAX5903 limit the inrush current to the
load and provide a circuit-breaker function for overcurrent
protection. During startup the circuit-breaker function is
disabled and the MAX5902/MAX5903 limit the inrush cur-
rent by gradually turning on the external MOSFET. Once
the external MOSFET is fully enhanced, the circuit-break-
er function is enabled and the MAX5902/MAX5903 pro-
vide overcurrent protection by monitoring the voltage
drop across the external MOSFET’s on-resistance.
The MAX5902/MAX5903 include an undervoltage lock-
out (UVLO) function, ON/OFF control input, and a
power-good status output, PGOOD (MAX5902) or
PGOOD (MAX5903). A built-in thermal shutdown fea-
ture is also included to protect the external MOSFET in
case of overheating.
The MAX5902/MAX5903 offer latched or autoretry fault
management and are available with 300mV, 400mV or
500mV circuit-breaker thresholds. Both the MAX5902 and
MAX5903 are available in small SOT23 and TDFN pack-
ages, and are specified for the extended -40°C to +85°C
temperature range. For specific ordering information, see
the Selector Guide at the end of the data sheet.
Applications
Network Routers Servers
Network Switches RAID
Base Station Line Industrial Systems
Cards
Features
♦ Wide +9V to +72V Operation
♦ Requires No External Sense Resistor
♦ Drives External p-Channel MOSFET
♦ Limits Inrush Current
♦ Circuit-Breaker Function
♦ Less than 2mA Quiescent Current
♦ ON/OFF Input Permits Load Power-Supply
Control and Sequencing
♦ Adjustable Undervoltage Lockout
♦ Power-Good Output with +72V Rating
♦ Latching or Automatic Retry Fault Management
♦ Thermal Shutdown Helps Protect the External
MOSFET
♦ Available in Two Small Packages
6-Pin TDFN and SOT23
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX5902_ _EUT-T+*
-40°C to +85°C 6 SOT23-6
U6F+6
MAX5902_ _ETT-T+*
-40°C to +85°C 6 TDFN-6
T633+2
MAX5903_ _EUT-T+*
-40°C to +85°C 6 SOT23-6
U6F+6
MAX5903_ _ETT-T+*
-40°C to +85°C 6 TDFN-6
T633+2
*For specific part numbers see the Selector Guide at end of
data sheet.
+Denotes lead-free package.
GND
16ON/OFF
5 PGOOD (PGOOD)
V
S
MAX5902
MAX5903
SOT23-6
TOP VIEW
( ) ARE FOR MAX5903 ONLY.
2
34
DRAIN
GATE
Pin Configurations
Typical Operating Circuits
GND
ON/OFF
HOT-SWAP CONTROLLER
V
S
GND
50W ISOLATED
POWER SUPPLY
V
IN
(-)
ON/OFF
LUCENT
JW050A1
V
IN
(+)
GATE
DRAIN
PGOOD
+48V
BACKPLANE CIRCUIT CARD
IRFR5410
MAX5902
Simple Swapper is a trademark of Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
Typical Operating Circuits continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX5902/MAX5903
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
S
= +9V to +72V, GND = 0V, ON/OFF open circuit, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
S
= +48V
and T
A
= +25°C.) (Notes 1, 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Terminal Voltage (with respect to GND unless otherwise noted)
V
S
, DRAIN, PGOOD, PGOOD ................................-0.3V to +76V
ON/OFF ....................................................................-0.3V to +4V
GATE to V
S
............................................................-12V to +0.3V
Current into any Pin ............................................................±3mA
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 9.1mW/°C above +70°C)..........727mW
6-Pin TDFN (derate 18.2mW/°C above +70°C) .......1454mW
Junction to Case
Thermal Resistance, θ
JC
(TDFN) ..............................8.5°C/W
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
PARAMETER
C O ND IT IO N S
M IN
T YP
M A X
U N IT S
Supply Voltage
V
S
972V
Supply Current
I
GND
M easur ed out of G N D , P GO O D or PGOOD
op en ci r cui t, D RAIN = V
S
12mA
V
S
= +36V to +72V
91011
External Gate Drive
V
GS
V
S
- V
GATE
V
S
= +9V
8 8.5
V
V
S
= +36V to +72V
5918
Load Voltage Slew-Rate
Magnitude
SR
| dV
DRAIN
/dt |
C
L
= 10µF
V
S
= +9V
3611
V/ms
Default Undervoltage Lockout
V
UVLO
V
S
increasing
28.5 31.5 34.5
V
Undervoltage Lockout
Hysteresis
3.5 V
ON/OFF Pin Input Resistance
R
ON/OFF
19 32 52 kΩ
DRAIN to GND Resistance
R
DGND
900
kΩ
DRAIN to V
S
Resistance R
DS
650
kΩ
ON/OFF Reference Threshold
V
ON/OFF
V
ON/OFF
Increasing
1.14 1.26 1.38
V
ON/OFF Hysteresis
140
mV
Start Delay (Note 3)
t
ON
80
150 280
ms
ON/OFF Off Delay (Note 4)
t
OFF
V
S
- V
GATE
< 1V
51018ms
MAX590_ _AEUT
200 300 460
MAX590_ _BEUT
280 400 540
Circuit-Breaker Threshold
V
CB
V
S
- V
DRAIN
MAX590_ _CEUT
400 500 660
mV
C
GATE
= 1nF
2 6.5
C
GATE
= 4.7nF
411
Circuit-Breaker Delay (Note 5)
t
CB
(V
S
- V
DRAIN
) > V
CB
until (V
S
- V
GATE
)
< 1V, 200mV
overdrive step
C
GATE
= 10nF
717
µs
Restart Delay (Note 3)
t
RS
After circuit breaker event,
MAX590_ A_EUT only
80
150 280
ms
P ow er - G ood O utp ut Low V ol tag e
V
OL
I
OL
= 1mA
0.3 0.6 V
MAX5902/MAX5903
+72V, SOT23/TDFN, Simple Swapper Hot-Swap
Controllers
_______________________________________________________________________________________ 3
Note 1: All currents into device pins are positive, all currents out of device pins are negative, and all voltages are referenced to
GND, unless otherwise noted.
Note 2: All specifications are 100% tested at T
A
= +25°C, unless otherwise noted. Specifications over -40°C to +85°C are guaran-
teed by characterization.
Note 3: This is the delay time from a valid on condition until V
GS
begins rising. Valid on conditions are: the device is not in undervolt-
age lockout; ON/OFF is not driven low; and the device is not in thermal shutdown.
Note 4: This is the delay from a valid low on ON/OFF until V
GS
falls. Pulses on ON/OFF less than t
OFF
are ignored, offering glitch
immunity.
Note 5: Guaranteed by characterization, not production tested. C
GATE
is a capacitor from GATE to V
S
.
ELECTRICAL CHARACTERISTICS (continued)
(V
S
= +9V to +72V, GND = 0V, ON/OFF open circuit, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
S
= +48V
and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
C O ND IT IO N S
M IN
T YP
M A X
U N IT S
Power-Good Output Open-Drain
Leakage Current
I
OH
V
PGOOD
= 72V (MAX5902)
V
PGOOD
= 72V (MAX5903)
10 µA
Thermal Shutdown Temperature
T
SD
Junction temperature
+125
°C
Thermal Shutdown Hysteresis
T
HY
15 °C
Typical Operating Characteristics
(V
S
= +48V, GND = 0V, and T
A
= +25°C, unless otherwise noted. See Figure 2 for test circuits.)
0.7
0.8
1.0
0.9
1.1
1.2
03015 45 60 75
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX5902 toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
0.7
0.8
1.0
0.9
1.1
1.2
-40 10-15 35 60 85
SUPPLY CURRENT
vs. TEMPERATURE
MAX5902 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
IN
= +70V
V
IN
= +48V
V
IN
= +12V
25
28
27
26
29
30
31
32
33
34
35
-40 10-15 356085
V
UVLO
THRESHOLD
vs. TEMPERATURE
MAX5902 toc03
TEMPERATURE (°C)
LOCKOUT VOLTAGE (V)
INCREASING V
IN
DECREASING V
IN
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX5903LBETT+T

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Buy MAX5903LBETT+T
Manufacturer:
Maxim Integrated
Description:
Hot Swap Voltage Controllers 72V Hot-Swap Controller
Lifecycle:
New from this manufacturer.
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