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General Description
The MAX5961 0 to 16V, quad, hot-swap controller pro-
vides complete protection for systems with up to four
distinct supply voltages. The device allows the safe
insertion and removal of circuit cards into live back-
planes. The MAX5961 is an advanced hot-swap con-
troller that monitors voltage and current with an internal
10-bit ADC. The device provides two levels of overcur-
rent circuit-breaker protection; a fast-trip threshold for a
fast turn-off, and a lower slow-trip threshold for a
delayed turn-off. The maximum overcurrent circuit-
breaker threshold range is set independently for each
channel with a trilevel input (ILIM_) or by programming
though an I
2
C interface.
The internal 10-bit ADC is multiplexed to monitor the
output voltage and current of each hot-swap channel.
The total time to cycle through all the eight measure-
ments is 100µs (typ). Each 10-bit value is stored in an
internal circular buffer so that 50 past samples of each
signal can be read back through the I
2
C interface at
any time or after a fault condition.
The MAX5961 can be configured as four independent
hot-swap controllers, hot-swap controllers operating in
pairs, or as a group of four hot-swap controllers.
The device also includes five digital comparators per
hot-swap channel to implement overcurrent warning,
two levels of overvoltage detection, and two levels of
undervoltage detection. The limits for overcurrent, over-
voltage, and undervoltage are user-programmable.
When any of the measured values violates the program-
mable limits, an external ALERT signal is asserted. In
addition to the ALERT signal, depending on the select-
ed operating mode, the MAX5961 can deassert a
power-good signal and/or turn-off the external MOSFET.
The MAX5961 is available in a 48-pin thin QFN pack-
age and operates over the -40°C to +85°C extended
temperature range.
Applications
PCI Express
®
Hot Plug
Servers
Disk Drives
Storage Systems
ASICs
Features
o Four Independent Hot-Swap Controllers Protect
from 0 to 16V (Provided IN 2.7V)
o 10-Bit ADC Monitors Voltage and Current of Each
Channel
o Circular Buffer Stores 5ms of Current and Voltage
Measurements
o Four Independent Internal Charge Pumps
Generate n-Channel MOSFET Gate Drives
o Internal 500mA Gate Pulldown Current for Fast
Shutdown
o VariableSpeed/BiLevel™ Circuit-Breaker Protection
o Alert Output Indicates Undervoltage Warning,
Undervoltage Critical, Overvoltage Warning,
Overvoltage Critical, and Overcurrent Warning for
Each Channel
o Independent Power-Good Outputs
o Autoretry or Latched Fault Management
o 400kHz I
2
C Interface
o 7mm x 7mm 48-Pin TQFN Package
MAX5961
0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
________________________________________________________________
Maxim Integrated Products
1
TOP VIEW
MAX5961
THIN QFN
7mm x 7mm
13
14
15
16
17
18
19
20
21
22
23
24
FAULT1
FAULT2
FAULT3
FAULT4
SDA
SCL
ALERT
PG1
PG2
PG3
PG4
DGND
48
47
46
45
44
43
42
41
40
39
38
37
1
2
345678910
11
12
HWEN
MODE
PROT
A0
A1
REG
AGND
IN
ILIM1
ILIM2
ILIM3
ILIM4
ON3
ON1
DREG
POL
SENSE3
MON3
GATE3
GND3
GND1
GATE1
MON1
SENSE1
36
+
35
34 33 32 31 30 29 28 27
26
25
ON4
ON2
RETRY
I.C.
SENSE4
MON4
GATE4
GND4
GND2
GATE2
MON2
SENSE2
Pin Configuration
Ordering Information
19-4167; Rev 0; 6/08
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.
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-PACKAGE
MAX5961ETM+
-40°C to +85°C
48 Thi n QFN–E P *
PCI Express is a registered trademark of PCI-SIG Corp.
VariableSpeed/BiLevel is a trademark of Maxim Integrated
Products, Inc.
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
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Inhaltsverzeichnis

Seite 1 - Ordering Information

General DescriptionThe MAX5961 0 to 16V, quad, hot-swap controller pro-vides complete protection for systems with up to fourdistinct supply voltages.

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor10 _________________________________________________________________

Seite 3

MAX5961Functional DiagramRATIOREGISTERBANKCIRCULARBUFFERLDOUVLOREF/BIASINREGGATE_MON_SENSE_ILIM_4444AGND DGND GND1, GND2, GND3, GND4FAULT_PG_44ON_4HWE

Seite 4

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor12 _________________________________________________________________

Seite 5

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 6

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor14 _________________________________________________________________

Seite 7

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 8

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor16 _________________________________________________________________

Seite 9 - Pin Description

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 10 - Pin Description (continued)

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor18 _________________________________________________________________

Seite 11 - Functional Diagram

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 12 - Typical Operating Circuit

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor2 __________________________________________________________________

Seite 13 - Typical Application Circuit

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor20 _________________________________________________________________

Seite 14 - Detailed Description

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 15

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor22 _________________________________________________________________

Seite 16 - Grouping Hot-Swap Channels

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 17

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor24 _________________________________________________________________

Seite 18

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 19 - Circuit-Breaker Protection

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor26 _________________________________________________________________

Seite 20 - MAX5961 fig02

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 21

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor28 _________________________________________________________________

Seite 22

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 23 - Digital Current Monitoring

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 24

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor30 _________________________________________________________________

Seite 25

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 26 - Power-Good Outputs

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor32 _________________________________________________________________

Seite 27 - Digital Undervoltage and

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 28

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor34 _________________________________________________________________

Seite 29

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 30

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor36 _________________________________________________________________

Seite 31

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 32 - Using the Voltage and

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor38 _________________________________________________________________

Seite 33

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 34 - Circular Buffer

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor4 __________________________________________________________________

Seite 35 - Force-On Function

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor40 _________________________________________________________________

Seite 36 - Fault Logging and Indications

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 37 - FAULT_ Outputs

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage MonitorMaxim cannot assume responsibility for use of any circuitry other th

Seite 38 - C Serial Interface

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 39 - REPEATED START Conditions

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor6 __________________________________________________________________

Seite 40 - C Protocols

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

Seite 41 - Write Byte

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor8 __________________________________________________________________

Seite 42 - Package Information

MAX59610 to 16V, Quad, Hot-Swap Controller with 10-Bit Current and Voltage Monitor____________________________________________________________________

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