MAX8533 MAXIM [Maxim Integrated Products], MAX8533 Datasheet

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MAX8533

Manufacturer Part Number
MAX8533
Description
Smallest, Most Reliable, 12V, Infiniband- Compliant Hot-Swap Controller
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number:
MAX8533EUB+
Manufacturer:
Maxim Integrated Products
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MAX8533EUB+T
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The MAX8533 is a single-port, 12V, Infiniband
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.
19-2849; Rev 0; 4/03
Pin Configuration appears at end of data sheet.
Infiniband is a trademark of Infiniband
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.
12V Hot-Swap
Infiniband Bulk Power
Hot-Swap/Plug/Dock Power Management
Blade Servers
RAID
Network Routers and Switches
________________________________________________________________ Maxim Integrated Products
Smallest, Most Reliable, 12V, Infiniband-
General Description
SM
Trade Association.
Applications
Compliant Hot-Swap Controller
TM
-compli-
o 12V Hot-Swap Controller for 25W or 50W
o Programmable Overcurrent Protection Regulation
o EN and LPEN Inputs for Flexible Sequencing
o Power-Good Signal
o 16V Absolute Maximum Rating Withstands
o Soft-Start Overcurrent Protection During Turn-On
o Timed Current Regulation Period (Adjustable)
o 100ns IC Response Time to Output Dead Short
o Adjustable Overvoltage Protection
o Undervoltage Lockout
o Adjustable Turn-On Ramp
MAX8533EUB
VB_RET
VB_IN
VBxEN
Infiniband Ports
Level
Inductive Kickbacks
LPEN
BACKPLANE
PART
INFINIBAND
Typical Operating Circuit
MODULE
10V TO 14V
Ordering Information
-40 C to +85 C
TEMP RANGE
EN
LPEN
CTIM
IN
ISET
MAX8533
RET
GATE
Features
10 µMAX
PIN-PACKAGE
POK
OUT
OVP
VB_OUT
V
IN
1

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MAX8533 Summary of contents

Page 1

... 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 ...

Page 2

Smallest, Most Reliable, 12V, Infiniband- Compliant Hot-Swap Controller ABSOLUTE MAXIMUM RATINGS IN, POK to RET .......................................................-0.3V to +16V GATE to RET ...................................................-0. OUT, ISET, CTIM to RET ..............................-0. EN, LPEN, OVP to RET .............................................-0.3V to +6V ...

Page 3

Smallest, Most Reliable, 12V, Infiniband- ELECTRICAL CHARACTERISTICS (continued +12V +85 C, unless otherwise noted. Typical values are PARAMETER LPEN Rising Threshold Hysteresis = 120mV LPEN ...

Page 4

... V LPEN 0V 10V/div V POK 0V 10V/div V OUT 0V 5A/div MIN TYP MAX UNITS 1.3 2 µA 1.96 2. µ 1.4 2.2 V HOT PLUG INTO SHORT CIRCUIT MAX8533 toc03 10V/div POK V OUT 0V 5A/div 20ms/div MAX8533 toc05 5V/div 0V 10V/div 0V 10V/div 0V 5A/div 0A 200ms/div ...

Page 5

... A FUNCTION OF GATE CAPACITOR (C2) MAX8533 toc08 0.047 F 0.1 F 10V/div 0.022 F 0V 12V 10V/div V OUT 0V 2A/div 0A MAX8533 toc10 0. 2A/div V OUT FAULT CONDITION MAX8533 toc07 10V/div 0V 10V/div 0V 5V/div 0A 2ms/div MAX8533 toc09 0.22 F 0.47 F 5V/div 0V 40ms/div HOT UNPLUG MAX8533 toc11 10V/div 0V 10V/div 0V 2A/div 0A 4ms/div 5 ...

Page 6

... The MAX8533 is a single-port, 12V, IB-compliant versa- tile hot-swap controller IC designed for applications where a line card is inserted into a live backplane. The MAX8533 can be implemented in both IB Class I (non- isolated) and Class II (isolated) power-topology appli- cations. Normally, when a line card is plugged into a live backplane, the low impedance of the card’s dis- charged filter capacitors can momentarily collapse the input supply voltage ...

Page 7

... Smallest, Most Reliable, 12V, Infiniband- Startup Into Load The MAX8533 is intended to be used in a circuit where no load is applied until the POK signal is enabled application where the load is applied during the output- voltage ramp up, the R of the MOSFET is higher DS(ON) and the power dissipated by the MOSFET is larger. ...

Page 8

... the desired overvoltage threshold and V OVT 2V (typ). OVP latches off the MAX8533 if an overvoltage condition exists for 1.5ms. Toggle EN, LPEN, or input power to clear the latched fault condition. Overcurrent, severe overcurrent, and overvoltage con- ditions result in the MAX8533 entering a latched fault ) latches off the condition ...

Page 9

... IC. The traces from the current-sense resistor to IN and ISET should be as short as possible for accurate current sensing. Place the MAX8533 cir- cuit as close as possible to the backplane connector. A sample PC board layout is available in the MAX8533 Evaluation Kit. _______________________________________________________________________________________ Compliant Hot-Swap Controller ...

Page 10

Smallest, Most Reliable, 12V, Infiniband- Compliant Hot-Swap Controller (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages ÿ 0.50±0.1 0.6±0.1 1 0.6±0.1 TOP VIEW ...

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