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MAX8533EUB+T

P1-P3P4-P6P7-P9P10-P10
General Description
The MAX8533 is a single-port, 12V, Infiniband
TM
-compli-
ant (IB) versatile hot-swap controller. The device can be
implemented in both IB Class I (nonisolated) and Class II
(isolated) power-topology applications. Additionally, the
MAX8533 can be used as a reliable power controller on
hot-swappable blade servers, RAID cards, and network
switches or routers that are powered from a 12V bus.
The MAX8533 integrates several features that allow reli-
able insertion and removal of the circuit card, as well as
real-time monitoring of abnormal occurrences. The
MAX8533 allows for an adjustable soft-start ramp during
turn-on of the input voltage, while providing overcurrent
protection. It also provides accurate and consistent cur-
rent-regulated outputs for a programmable period of time
to latch off and soft-start in the presence of overcurrent
conditions (OC). Additionally, it provides a second level
of severe overcurrent (SOC) protection by responding to
a dead short in 100ns. The MAX8533 also includes
adjustable overvoltage protection.
The MAX8533 incorporates undervoltage lockout
(UVLO) and a power-good (POK) signal to the DC-to-
DC converters to confirm the status of output voltage
rails during operation. Two enable inputs EN (logic
enable) and LPEN (local power enable) provide flexible
sequencing. The MAX8533 is specified across the
extended temperature range and has an absolute maxi-
mum rating of 16V to withstand inductive kickback dur-
ing board removal.
The MAX8533 is available in the space-saving 10-pin
µMAX package.
Applications
12V Hot-Swap
Infiniband Bulk Power
Hot-Swap/Plug/Dock Power Management
Blade Servers
RAID
Network Routers and Switches
Features
♦ 12V Hot-Swap Controller for 25W or 50W
Infiniband Ports
♦ Programmable Overcurrent Protection Regulation
Level
♦ EN and LPEN Inputs for Flexible Sequencing
♦ Power-Good Signal
♦ 16V Absolute Maximum Rating Withstands
Inductive Kickbacks
♦ Soft-Start Overcurrent Protection During Turn-On
♦ Timed Current Regulation Period (Adjustable)
♦ 100ns IC Response Time to Output Dead Short
♦ Adjustable Overvoltage Protection
♦ Undervoltage Lockout
♦ Adjustable Turn-On Ramp
MAX8533
Smallest, Most Reliable, 12V, Infiniband-
Compliant Hot-Swap Controller
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2849; Rev 0; 4/03
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.
Pin Configuration appears at end of data sheet.
Infiniband is a trademark of Infiniband
SM
Trade Association.
PART TEMP RANGE PIN-PACKAGE
MAX8533EUB -40°C to +85°C 10 µMAX
MAX8533
IN
VB_IN
BACKPLANE
10V TO 14V
INFINIBAND
MODULE
ISET GATE OUT
VB_OUT
V
IN
OVP
POKRET
VB_RET
CTIM
LPEN
LPEN
EN
VBxEN
Typical Operating Circuit
MAX8533
Smallest, Most Reliable, 12V, Infiniband-
Compliant Hot-Swap Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V, V
EN
= 0, T
A
= 0
°°
C to +85
°°
C, unless otherwise noted. Typical values are at T
A
= +25°C.)
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.
IN, POK to RET .......................................................-0.3V to +16V
GATE to RET...................................................-0.3V to (V
IN
+ 7V)
OUT, ISET, CTIM to RET..............................-0.3V to (V
IN
+ 0.3V)
EN, LPEN, OVP to RET .............................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMax (derate 5.6 mW/°C above +70°C).......444.4 mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
VB BULK SUPPLY CONTROL
IN Supply Voltage Range 10 12 14 V
ISET Current Source 18.5 20 21.5 µA
Current-Limit Offset Voltage V
ISET
- V
IN
-4 0 +4 mV
OUT Input Current V
OUT
= 12V 6 12 µA
Severe Overcurrent Threshold With respect to current regulation threshold 150 mV
25W OUT Current Regulation R
ISET
= 3.09kΩ ±1%, R
SENSE
= 20mΩ ±1% 2.6 3.1 3.6 A
50W OUT Current Regulation R
ISET
= 3.09kΩ ±1%, R
SENSE
= 10mΩ ±1% 5.2 6.2 7.2 A
GATE PARAMETERS
Gate Response Time to Severe
Overcurrent
V
RSENSE
≥ (150mV + current regulation threshold +
50mV) until V
GATE
begins to slew low (Note 1)
100 ns
Gate Response Time to
Overcurrent
V
RSENSE
≥ current regulation threshold + 50mV until
V
GATE
begins to slew low (Note 1)
600 ns
Gate Turn-On Current 8.4 10 11.6 µA
Overcurrent, V
RSENSE
≥ (current regulation threshold +
100mV) (Note 1)
2.7
Gate Pulldown Current
Severe overcurrent 350
mA
Gate High Voltage V
IN
+ 4 V
IN
+ 5 V
IN PARAMETERS
Quiescent Supply Current 1.5 3 mA
IN UVLO Threshold Hysteresis = 300mV 7.5 8.4 9.0 V
POK Undervoltage Threshold Measured at OUT, rising edge, hysteresis = 300mV 9.2 9.6 10.0 V
POK Delay V
POK
rising 100 220 350 µs
POK Output Voltage V
OUT
< 9.2V, I
POK
= 1.6mA 0.1 0.25 V
POK Leakage Current V
OUT
> 10V, V
POK
= 14V 0.1 1 µA
EN Rising Threshold Hysteresis = 120mV 1.3 1.65 2.0 V
EN Pullup Voltage EN unconnected 4.5 5.5 V
EN Pullup Current 12 20 28 µA
MAX8533
Smallest, Most Reliable, 12V, Infiniband-
Compliant Hot-Swap Controller
_______________________________________________________________________________________ 3
PARAMETER CONDITIONS MIN TYP MAX UNITS
LPEN Rising Threshold Hysteresis = 120mV 1.3 1.65 2.0 V
LPEN Pullup Voltage LPEN unconnected 4.5 5.5 V
LPEN Pullup Current 12 20 28 µA
OVP Threshold Voltage Hysteresis = 10mV, V
OVP
rising 1.96 2.00 2.04 V
OVP Fault Timeout 1.5 ms
CTIM PARAMETERS
CTIM Charging Current V
CTIM
< 1.5V 16 20 24 µA
CTIM Fault Pullup Current V
CTIM
= 6V 6 8 12 mA
Current-Limit Timeout Threshold
Voltage
1.5 1.8 2.1 V
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +12V, V
EN
= 0, T
A
= 0
°°
C to +85
°°
C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
VB BULK SUPPLY CONTROL
IN Supply Voltage Range 10 14 V
ISET Current Source Current regulation threshold = I
SET
x R
ISET
18 22 µA
Current-Limit Offset Voltage V
ISET
- V
IN
-4 +4 mV
OUT Input Current V
OUT
= 12V 12 µA
25W OUT Current Regulation R
ISET
= 3.09kΩ ±1%, R
SENSE
= 20mΩ ±1% 2.5 3.7 A
50W OUT Current Regulation R
ISET
= 3.09kΩ ±1%, R
SENSE
= 10mΩ ±1% 5.0 7.4 A
GATE PARAMETERS
Gate Turn-On Current 812µA
Gate High Voltage V
IN
+ 4 V
IN PARAMETERS
Quiescent Supply Current 3mA
IN UVLO Threshold Hysteresis = 300mV 7.5 9.0 V
POK Undervoltage Threshold Measured at OUT, rising edge, hysteresis = 300mV 9.0 10.2 V
POK Delay V
POK
rising 100 350 µs
POK Output Voltage V
OUT
< 9.2V, I
POK
= 1.6mA 0.25 V
POK Leakage Current V
OUT
> 10V, V
POK
= 14V 1 µA
EN Rising Threshold Hysteresis = 120mV 1.3 2.0 V
EN Pullup Voltage EN unconnected 4.5 V
EN Pullup Current 12 28 µA
ELECTRICAL CHARACTERISTICS
(V
IN
= +12V, V
EN
= 0, T
A
= -40
°°
C to +85
°°
C, unless otherwise noted.) (Note 2)
P1-P3P4-P6P7-P9P10-P10

MAX8533EUB+T

Mfr. #:
Buy MAX8533EUB+T
Manufacturer:
Maxim Integrated
Description:
Hot Swap Voltage Controllers 12V InfiniBand-Comp Hot-Swap Controller
Lifecycle:
New from this manufacturer.
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