max5931aeep Maxim Integrated Products, Inc., max5931aeep Datasheet

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max5931aeep

Manufacturer Part Number
max5931aeep
Description
Low-voltage, Triple, Hot-swap Controllers/ Power Sequencers/voltage Trackers
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX5931AEEP.pdf (23 pages)
The MAX5930A/MAX5931A/MAX5931B +1V to +15V
triple hot-swap controllers provide complete protection
for multisupply systems. They allow the safe insertion
and removal of circuit cards into live backplanes. These
devices hot swap multiple supplies ranging from +1V to
+15V, provided one supply is at or above +2.7V. The
input voltage rails (channels) can be configured to
sequentially turn-on/off, track each other, or have com-
pletely independent operation.
The discharged filter capacitors of the circuit card provide
low impedance to the live backplane. High inrush cur-
rents from the backplane to the circuit card can burn up
connectors and components, or momentarily collapse the
backplane power supply leading to a system reset. The
MAX5930A/MAX5931A/MAX5931B hot-swap controllers
prevent such problems by gradually ramping up the out-
put voltage and regulating the current to a preset limit
when the board is plugged in, allowing the system to sta-
bilize safely. After the startup cycle is complete, on-chip
comparators provide VariableSpeed/BiLevel™ protection
against short-circuit and overcurrent faults, and provide
immunity against system noise and load transients.
The load is disconnected in the event of a fault condi-
tion. The MAX5930A/MAX5931A/MAX5931B fault-man-
agement mode is selectable, allowing latched fault or
autoretry after a fault condition.
The MAX5930A/MAX5931A/MAX5931B offer a variety of
options to reduce external component count and
design time. All devices integrate an on-board charge
pump to drive the gates of low-cost, external n-channel
MOSFETs, an adjustable startup timer, and an
adjustable current limit. The devices offer integrated
features like startup current regulation and current
glitch protection to eliminate external timing resistors
and capacitors. The MAX5931A provides an open-
drain, active-low status output for each channel, the
MAX5931B provides an open-drain, active-high status
output for each channel, and the MAX5930A status out-
put polarity is selectable.
The MAX5930A is available in a 24-pin QSOP package,
and the MAX5931A/MAX5931B are available in a 20-pin
QSOP package. All devices are specified over the
extended -40°C to +85°C temperature range.
19-4200; Rev 0; 7/08
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.
Network Switches, Routers,
Hubs
Hot Plug-In Daughter Cards
RAID
Solid-State Circuit Breakers
Low-Voltage, Triple, Hot-Swap Controllers/
________________________________________________________________ Maxim Integrated Products
General Description
Power Sequencers/Voltage Trackers
Power-Supply
Sequencing/Tracking
Base-Station Line Cards
Portable Computer Device
Bays (Docking Stations)
Applications
o Safe Hot Swap for +1V to +15V Power Supplies
o Adjustable Circuit-Breaker/Current-Limit
o Configurable Tracking, Sequencing, or
o VariableSpeed/BiLevel Circuit-Breaker Response
o Internal Charge Pumps Generate n-Channel
o Inrush Current Regulated at Startup
o Autoretry or Latched Fault Management
o Programmable Undervoltage Lockout
o Status Outputs Indicate Fault/Safe Condition
+ Denotes a lead-free/RoHS-compliant package.
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
VariableSpeed/BiLevel is a trademark of Maxim Integrated
Products, Inc.
Pin Configurations continued at end of data sheet.
MAX5930AEEG+
MAX5931AEEP+
MAX5931BEEP+
with Any Input Voltage (V
Threshold from 25mV to 100mV
Independent Operation Modes
MOSFET Gate Drives
PART
TOP VIEW
SENSE1
LATCH
GATE1
STAT1
STAT2
STAT3
LIM1
ON2
ON1
POL
TIM
IN1
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
10
11
12
1
2
3
4
5
6
7
8
9
Pin Configurations
MAX5930A
QSOP
IN_
) ≥ 2.7V
24
23
22
21
20
19
18
17
16
15
14
13
MODE
ON3
LIM2
IN2
SENSE2
GATE2
LIM3
IN3
SENSE3
GATE3
GND
BIAS
PIN-PACKAGE
24 QSOP
20 QSOP
20 QSOP
Features
1

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max5931aeep Summary of contents

Page 1

... MOSFET Gate Drives o Inrush Current Regulated at Startup o Autoretry or Latched Fault Management o Programmable Undervoltage Lockout o Status Outputs Indicate Fault/Safe Condition PART MAX5930AEEG+ MAX5931AEEP+ MAX5931BEEP+ + Denotes a lead-free/RoHS-compliant package. Selector Guide and Typical Operating Circuit appear at end of data sheet. TOP VIEW Applications Pin Configurations continued at end of data sheet. ...

Page 2

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) IN_ ..........................................................................-0.3V to +16V GATE_.............................................................-0.3V to (IN_ + 6V) BIAS (Note 1) .............................................. (V ON_, STAT_, LIM_ (MAX5930A), TIM, MODE, LATCH, POL ...

Page 3

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ELECTRICAL CHARACTERISTICS (continued +1V to +15V, provided at least one supply is larger than or equal to +2.7V, T IN_ values are 12.0V 5.0V, V IN1 ...

Page 4

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ELECTRICAL CHARACTERISTICS (continued +1V to +15V, provided at least one supply is larger than or equal to +2.7V, T IN_ values are 12.0V 5.0V, V IN1 ...

Page 5

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ( Typical Operating Circuit , Fairchild FDB7030L, V erwise noted. Channels 1 through 3 are identical in performance. Where characteristics are interchangeable, channels 1 through 3 are ...

Page 6

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ( Typical Operating Circuit , Fairchild FDB7030L, V erwise noted. Channels 1 through 3 are identical in performance. Where characteristics are interchangeable, channels 1 through 3 are ...

Page 7

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ( Typical Operating Circuit , Fairchild FDB7030L, V erwise noted. Channels 1 through 3 are identical in performance. Where characteristics are interchangeable, channels 1 through 3 are ...

Page 8

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers PIN NAME MAX5931A/ MAX5930A MAX5931B 1 — POL 2 1 ON2 3 2 ON1 4 — LIM1 5 3 IN1 6 4 SENSE1 7 5 GATE1 8 6 STAT1 9 7 STAT2 10 ...

Page 9

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers PIN NAME MAX5931A/ MAX5930A MAX5931B 23 19 ON3 24 20 MODE Detailed Description The MAX5930A/MAX5931A/MAX5931B are circuit- breaker ICs for hot-swap applications where a line card is inserted into a live backplane. The ...

Page 10

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers R LIM1 LIM1* IN1 V V SC SENSE1 FAST COMPARATOR SENSE1 SLOW COMPARATOR GATE1 CHARGE Q1 PUMP OUT1 SLOW DISCHARGE FAST DISCHARGE 3mA 50mA 100μA STAT1 LIM3* R LIM3 ...

Page 11

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ON1 ON2 ON3 ANY IN_ IN2 IN3 * THE OUT_ DISCHARGE RATE IS A RESULT OF NATURAL DECAY OF THE LOAD RESISTANCE AND CAPACITANCE. Figure 2. Voltage-Tracking Timing Diagram (Provided t ______________________________________________________________________________________ * ...

Page 12

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ON1 ON2 ON3 ANY IN_ IN2 IN3 OUT1 OUT2 OUT3 * THE OUT_ DISCHARGE RATE IS A RESULT OF NATURAL DECAY OF THE LOAD RESISTANCE AND CAPACITANCE. Figure 3. Power-Sequencing Timing Diagram (Provided ...

Page 13

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ON1 = ON2 = ON3 OVERCURRENT FAULT CONDITION OUT1 OUT2 OUT3 * THE OUT_ DISCHARGE RATE IS A RESULT OF NATURAL DECAY OF THE LOAD RESISTANCE AND CAPACITANCE. Figure 4. Power-Sequencing Fault Turn-Off ...

Page 14

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ON1 ON2 ON3 IN1 IN2 IN3 t D,UVLO OUT1 OUT2 OUT3 * THE OUT_ DISCHARGE RATE IS A RESULT OF NATURAL DECAY OF THE LOAD RESISTANCE AND CAPACITANCE. Figure 5. Independent-Mode Timing Diagram ...

Page 15

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers ON_ STAT_ t START GATE_ V OUT_ V FC,TH R SENSE_ I LOAD_ t ON Figure 6. Independent-Mode Startup Waveforms Fast-Comparator Normal Operation In normal operation, if the load current ...

Page 16

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers Table 2. Selecting Fault-Management Mode (MAX5930A) LATCH FAULT MANAGEMENT Unconnected Fault condition latches MOSFETs off Low Autoretry mode Table 3. Selecting STAT_ Polarity (MAX5930A) POL Low Asserts low Unconnected Asserts high (open-drain) Applications ...

Page 17

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers Table 4. Status Output Truth Table: Voltage-Tracking and Power-Sequencing Modes CHANNEL 1 PART FAULT Yes X MAX5930A (POL = 1), X MAX5931B X No Yes X MAX5930A (POL = 0), X MAX5931A X ...

Page 18

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers Table 7. Component Manufacturers COMPONENT MANUFACTURER Vishay Sense Resistors IRC, Inc. Fairchild Semiconductor MOSFETs International Rectifier ON Semiconductor Setting the Startup Period, R The startup period ( adjustable from 0.4ms to ...

Page 19

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers R SENSE_ V IN_ R PULLUP IN_ SENSE_ GATE_ STAT_ MAX5930A MAX5931A MAX5931B ON_ GND Figure 9. Operating with an External Gate Capacitor With a 22nF gate capacitor, the inrush current, charge, and ...

Page 20

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers OFF GND V Z Figure 11. Power Sequencing: Channel Z Turns On t MOSFET Thermal Considerations During normal operation, the external MOSFETs dissi- pate little power. The MOSFET ...

Page 21

Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers BACKPLANE V V POWER IN OUT SUPPLY IN_ SENSE_ GATE_ MAX5930A MAX5931A MAX5931B ON_ Figure 12. Using the MAX5930A/MAX5931A/MAX5931B on a Backplane Layout Considerations To take full tracking advantage of the switch response ...

Page 22

... Low-Voltage, Triple, Hot-Swap Controllers/ Power Sequencers/Voltage Trackers BACKPLANE REMOVABLE CARD ON1 ON2 ON3 GND PART CURRENT LIMIT MAX5930AEEG+ MAX5931AEEP+ MAX5931BEEP+ 22 ______________________________________________________________________________________ R SENSE1 R SENSE2 R SENSE3 ON1 ON2 ON3 MAX5930A MAX5931A MAX5931B GND LIM1 LIM2 LIM3 *MAX5930A ONLY. **OPTIONAL COMPONENT. ...

Page 23

... For the latest package outline information and land patterns IN2 to www.maxim-ic.com/packages. 17 SENSE2 PACKAGE TYPE 16 GATE2 20 QSOP 15 IN3 24 QSOP 14 SENSE3 13 GATE3 12 GND 11 BIAS is a registered trademark of Maxim Integrated Products, Inc. Chip Information Package Information PACKAGE CODE DOCUMENT NO. E20-1 21-0055 E24-1 21-0055 ...

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