19-3264; Rev 0; 4/04
KIT
ATION
EVALU
BLE
AVAILA
Positive High-Voltage, Hot-Swap Controller
General Description
The MAX5932 is a fully integrated hot-swap controller for
+9V to +80V positive supply rails. The MAX5932 allows
for the safe insertion and removal of circuit cards into a
live backplane without causing glitches on the back-
plane power-supply rail. This device is pin and function
compatible to LT1641-1. The MAX5932 features a pro-
grammable foldback-current limit. If the device remains
in current limit for more than a programmable time, the
external n-channel MOSFET latches off. Other features
include a programmable undervoltage lockout and a
programmable output-voltage slew rate through an
external n-channel MOSFET.
The MAX5932 provides a power-good output (PWRGD)
to indicate the status of the output voltage. For a variety
of PWRGD/PWRGD, latch/autoretry-fault management,
autoretry duty-cycle options, refer to the MAX5933 and
MAX5934 data sheets.
The MAX5932 operates in the -40°C to +85°C extended
temperature range. This device is available in an
8-pin SO package.
Features
o
Pin and Function Compatible with LT1641-1
o
Provides Safe Hot Swap for +9V to +80V Power
Supplies
o
Safe Board Insertion and Removal from Live
Backplanes
o
Active-High Power-Good Output (PWRGD)
o
Programmable Foldback-Current Limiting
o
High-Side Drive for an External N-Channel MOSFET
o
Undervoltage Lockout (UVLO)
o
Overvoltage Protection
o
Latched Fault Management
o
User-Programmable Supply Voltage
Power-Up Rate
MAX5932
Applications
Hot Board Insertion
Electronic Circuit Breaker
Industrial High-Side Switch/Circuit Breaker
Network Routers and Switches
24V/48V Industrial/Alarm Systems
PART
MAX5932ESA
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 SO
Pin Configuration
TOP VIEW
Typical Application Circuit appears at end of data sheet.
ON
1
FB
2
8
7
V
CC
SENSE
GATE
TIMER
MAX5932
PWRGD
3
6
5
GND
4
SO
________________________________________________________________
Maxim Integrated Products
1
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.
Positive High-Voltage, Hot-Swap Controller
MAX5932
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
V
CC
.........................................................................-0.3V to +85V
SENSE, FB, ON ..........................................-0.3V to (V
CC
+ 0.3V)
TIMER, PWRGD......................................................-0.3V to +85V
GATE ......................................................................-0.3V to +95V
Maximum GATE Current ....................................-50mA, +150mA
Maximum Current into Any Other Pin................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)..................470mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
ESD Rating (Human Body Model)......................................2000V
Lead Temperature (soldering, 10s) .................................+300°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.
ELECTRICAL CHARACTERISTICS
(V
CC
= +24V, GND = 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Supply Current
V
CC
Undervoltage Lockout
V
CC
Undervoltage Lockout
Hysteresis
FB High-Voltage Threshold
FB Low-Voltage Threshold
FB Hysteresis
FB Input Bias Current
FB Threshold Line Regulation
SENSE Trip Voltage
(V
CC
- V
SENSE
)
GATE Pullup Current
GATE Pulldown Current
External N-Channel Gate Drive
TIMER Pullup Current
TIMER Pulldown Current
ON Logic-High Threshold
ON Logic-Low Threshold
ON Hysteresis
ON Input Bias Current
PWRGD Leakage Current
PWRGD Output Low Voltage
SENSE Input Bias Current
Thermal Shutdown
Thermal Shutdown Hysteresis
SYMBOL
V
CC
I
CC
V
LKO
V
LKOHYST
V
FBH
V
FBL
V
FBHYST
I
INFB
∆V
FB
V
SENSETRIP
I
GATEUP
I
GATEDN
∆V
GATE
I
TIMERUP
I
TIMERON
V
ONH
V
ONL
V
ONHYST
I
INON
I
OH
V
OL
I
SENSE
V
ON
= 0V
V
PWRGD
= 80V
I
O
= 2mA
I
O
= 4mA
V
SENSE
= 0V to V
CC
Temperature rising
-1
150
20
-1
V
FB
= 0V
9V
≤
V
CC
≤
80V, ON = 0V,
T
A
= 0°C to +70°C
V
FB
= 0V, T
A
= 0°C to +70°C
V
FB
= 1V, T
A
= 0°C to +70°C
Charge pump on, V
GATE
= 7V
Any fault condition, V
GATE
= 2V
V
GATE
- V
CC
V
TIMER
= 0V
V
TIMER
= 1V
ON low-to-high transition
ON high-to-low transition
V
CC
= 10.8V to 20V
V
CC
= 20V to 80V
8
39
-5
35
4.5
10
-24
1.5
1.280
1.221
12
47
-10
70
6.2
13.6
-80
3
1.313
1.233
80
+1
10
0.4
2.5
+3
-1
FB low-to-high transition
FB high-to-low transition
1.280
1.221
V
ON
= 3V, V
CC
= 80V
V
CC
low-to-high transition
7.5
CONDITIONS
MIN
9
1.4
8.3
0.4
1.313
1.233
80
+1
0.05
17
55
-20
100
18
18
-120
4.5
1.355
1.245
1.345
1.245
TYP
MAX
80
3.5
8.8
UNITS
V
mA
V
V
V
V
mV
µA
mV/V
mV
µA
mA
V
µA
µA
V
V
mV
µA
µA
V
µA
°C
°C
2
_______________________________________________________________________________________
Positive High-Voltage, Hot-Swap Controller
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +24V, GND = 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
ON Low-to-GATE Low
Propagation Delay
ON High-to-GATE High
Propagation Delay
FB Low-to-PWRGD Low
Propagation Delay
FB High-to-PWRGD High
Propagation Delay
(V
CC
- V
SENSE
) High-to-GATE
Low Propagation Delay
SYMBOL
t
PHLON
t
PLHON
t
PHLFB
t
PLHFB
t
PHLSENSE
CONDITIONS
C
GATE
= 0, Figures 1, 2
C
GATE
= 0, Figures 1, 2
Figures 1, 3
Figures 1, 3
T
A
= +25°C, C
GATE
= 0, Figures 1, 4
0.5
MIN
TYP
6
1.7
3.2
1.5
2
MAX
UNITS
µs
µs
µs
µs
µs
MAX5932
Note 1:
All currents into the device are positive and all currents out of the device are negative. All voltages are referenced to
ground, unless noted otherwise.
_______________________________________________________________________________________
3
Positive High-Voltage, Hot-Swap Controller
MAX5932
Test Circuit and Timing Diagrams
ON
V
CC
24V
MAX5932
FB
SENSE
1.313V
ON
5V
PWRGD
5kΩ
GATE
10nF
GATE
5V
t
PLHON
t
PHLON
1V
1.233V
GND
TIMER
Figure
1. Test Circuit
Figure
2. ON to GATE Timing
1.313V
FB
t
PLHFB
PWRGD
1V
1.233V
t
PHLFB
1V
V
CC
- SENSE
GATE
47mV
t
PHLSENSE
V
CC
Figure
3. FB to PWRGD Timing
Figure
4. SENSE to GATE Timing
4
_______________________________________________________________________________________
Positive High-Voltage, Hot-Swap Controller
Typical Operating Characteristics
(V
CC
= +48V, T
A
= +25°C, unless otherwise noted.)
FB LOW-VOLTAGE THRESHOLD
vs. TEMPERATURE
MAX5932 toc02
MAX5932
I
CC
vs. V
CC
MAX5932 toc01
I
CC
vs. TEMPERATURE
3.0
2.5
2.0
I
CC
(mA)
1.5
1.0
V
CC
= 48V
1.250
1.245
FB LOW-VOLTAGE THRESHOLD (V)
1.240
1.235
1.230
1.225
1.220
1.215
1.210
1.205
0
1.200
-40
-15
10
35
60
85
-40
2.4
2.1
1.8
I
CC
(mA)
1.5
1.2
0.9
0.6
0.3
0
0
8
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
0.5
V
CC
= 24V
16 24 32 40 48 56 64 72 80
V
CC
(V)
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
FB HIGH-VOLTAGE THRESHOLD
vs. TEMPERATURE
MAX5932 toc04
FB HYSTERESIS vs. TEMPERATURE
MAX5932 toc05
I
GATE
PULLUP CURRENT
vs. TEMPERATURE
-6
I
GATE
PULLUP CURRENT (µA)
-7
-8
-9
-10
-11
-12
-13
MAX5932 toc06
1.335
1.330
FB HIGH-VOLTAGE THRESHOLD (V)
1.325
1.320
1.315
1.310
1.305
1.300
1.295
1.290
1.285
1.280
-40
-15
10
35
60
0.11
0.10
FB HYSTERESIS (V)
0.09
0.08
0.07
0.06
0.05
0.04
-5
85
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
GATE DRIVE vs. TEMPERATURE
MAX5932 toc07
GATE DRIVE vs. V
CC
14
GATE DRIVE (V
GATE
- V
CC
) (V)
12
10
8
6
4
2
0
MAX5932 toc08
15
14
GATE DRIVE (V
GATE
- V
CC
) (V)
13
12
11
10
9
8
7
6
5
-40
-15
10
35
60
V
CC
= 10.8V
V
CC
= 48V
16
85
0
20
40
V
CC
(V)
60
80
TEMPERATURE (°C)
_______________________________________________________________________________________
MAX5932 toc03
2.7
5
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