19-3282; Rev 1; 7/04
Positive High-Voltage, Hot-Swap Controllers with
Selectable Fault Management and Status Polarity
General Description
The MAX5934/MAX5934A are fully integrated hot-swap
controllers for +9V to +80V (MAX5934A) positive supply
rails. The MAX5934 is optimized for +33V to +80V
power-supply rails. These devices allow for the safe
insertion and removal of circuit cards into a live back-
plane without causing glitches on the backplane
power-supply rail. The MAX5934/MAX5934A feature a
programmable analog foldback current limit, program-
mable undervoltage lockout, and programmable out-
put-voltage slew rate through an external n-channel
MOSFET. In addition, if these devices remain in current
limit for more than a programmable time, the external
n-channel MOSFET latches off.
The MAX5934/MAX5934A feature pin-selectable
PWRGD_ assertion polarity (active low or active high)
and pin-selectable fault management (latched or
autoretry). Other features include automatic restart after
a circuit-breaker fault, selectable duty-cycle (DC)
options, and thermal-shutdown mode for overtempera-
ture protection.
The MAX5934/MAX5934A operate in the extended
(-40°C to +85°C) temperature range and are available
in a 16-pin QSOP package.
Features
♦
Provides Safe Hot Swap for +9V to +80V Power
Supplies (MAX5934A)
♦
Safe Board Insertion and Removal from a Live
Backplane
♦
Pin-Selectable Active-Low or Active-High Power-
Good Output
♦
Pin-Selectable Latched or Autoretry Fault
Management
♦
Programmable Foldback Current Limiting
♦
High-Side Drive for an External N-Channel MOSFET
♦
Built-In Thermal Shutdown
♦
Undervoltage Lockout (UVLO)
♦
Pin-Selectable Duty-Cycle Options (0.94%, 1.88%,
3.75%)
MAX5934/MAX5934A
Ordering Information
PART
MAX5934EEE
MAX5934AEEE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
16 QSOP
Applications
Hot Board Insertion
Electronic Circuit Breakers
Industrial High-Side Switch/Circuit Breakers
Network Routers and Switches
24V/48V Industrial/Alarm Systems
TOP VIEW
LATCH/RETRY 1
ON 2
POL_SEL 3
FB1 4
16 V
CC
15 DC
14 SENSE
Pin Configuration
Typical Application Circuit appears at end of data sheet.
PWRGD2 5
PWRGD1 6
PWRGD3 7
GND 8
MAX5934
MAX5934A
13 N.C.
12 FB2
11 GATE
10 TIMER
9
OUT
QSOP
Selector Guide
PART
MAX5934
MAX5934A
DEFAULT UVLO
(V)
31
8.3
SUPPLY VOLTAGE
RANGE (V)
+33 to +80
+9 to +80
LATCHED/
AUTORETRY FAULT
PROTECTION
Pin-selectable
Pin-selectable
DUTY CYCLE
Pin-selectable
Pin-selectable
PWRGD_
OUTPUT LOGIC
Pin-selectable
Pin-selectable
________________________________________________________________
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 Controllers with
Selectable Fault Management and Status Polarity
MAX5934/MAX5934A
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_, DC,
LATCH/RETRY,
POL_SEL ....-0.3V to +85V
GATE ......................................................................-0.3V to +95V
OUT ................................................(V
GATE
- 14V) to the lower of
(V
GATE
+ 0.3V) and (V
CC
+ 0.3V)
Maximum GATE Current ....................................-50mA, +150mA
Maximum Current into Any Other Pin................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
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 (MAX5934A), V
CC
= +48V (MAX5934), 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
FB1 High-Voltage Threshold
FB2 High-Voltage Threshold
FB1 Low-Voltage Threshold
FB2 Low-Voltage Threshold
FB_ Hysteresis
FB_ Input Bias Current
FB1 Threshold Line Regulation
FB2 Threshold Line Regulation
SENSE Trip Voltage
(V
CC
- V
SENSE
)
GATE Pullup Current
GATE Pulldown Current
(V
GATE
- V
CC
) at PWRGD3
Assertion
External N-Channel Gate Drive
TIMER Pullup Current
SYMBOL
V
CC
I
CC
V
LKO
V
LKOHYST
V
FB1H
V
FB2H
V
FB1L
V
FB2L
V
FBHYST
I
INFB
∆V
FB1
∆V
FB2
V
SENSETRIP
I
GATEUP
I
GATEDN
V
FB_
= 0V
V
CC(MIN)
≤
V
CC
≤
80V, MAX5934A,
ON = 0V
V
CC(MIN)
≤
V
CC
≤
80V, MAX5934A,
ON = 0V
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
8
39
-5
35
3.8
10
4.5
10
-24
12
47
-10
70
4.3
13.6
13.6
13.6
-75
-1
CONDITIONS
MAX5934A
MAX5934
V
ON
= 3V, V
CC
= 80V
V
CC
low-to-high
transition
MAX5934A
MAX5934
FB1 low-to-high transition
FB2 low-to-high transition
FB1 high-to-low transition
FB2 high-to-low transition
1.280
1.280
1.221
1.202
80
+1
0.05
0.05
17
55
-20
100
5
18
18.0
18
-120
µA
V
MAX5934A
MAX5934
MIN
9
33
1.4
7.5
29.5
8.3
31
0.4
2
1.313
1.313
1.233
TYP
MAX
80
80
3.5
8.8
32.5
UNITS
V
mA
V
V
1.345
1.345
1.245
1.264
V
V
V
V
mV
µA
mV/V
mV/V
mV
µA
mA
V
∆V
GATEPWRGD3
V
GATE
- V
CC
, low-to-high transition
V
GATE
- V
CC
, MAX5934
∆V
GATE
I
TIMERUP
V
GATE
- V
CC
,
MAX5934A
V
TIMER
= 0V
V
CC
= 10.8V to 20V
V
CC
= 20V to 80V
2
_______________________________________________________________________________________
Positive High-Voltage, Hot-Swap Controllers with
Selectable Fault Management and Status Polarity
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +24V (MAX5934A), V
CC
= +48V (MAX5934), GND = 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
TIMER Pulldown Current
ON High Threshold
ON Low Threshold
ON Hysteresis
ON Input Bias Current
LATCH/RETRY
and POL_SEL
Low-Voltage Threshold
LATCH/RETRY
and POL_SEL
High-Voltage Threshold
LATCH/RETRY
and POL_SEL
Input Current
Source GATE Clamp Voltage
PWRGD_ Output Low Voltage
PWRGD_ Leakage Current
Thermal Shutdown
Thermal-Shutdown Hysteresis
SENSE Input Bias Current
DC High-Voltage Threshold 1
DC High-Voltage Threshold 2
DC High-Voltage Threshold 1
Hysteresis
DC High-Voltage Threshold 2
Hysteresis
DC Input Open-Circuit Voltage
DC Input Impedance
DC Input Current
ON Low-to-GATE Low
Propagation Delay
ON High-to-GATE High
Propagation Delay
I
SENSE
V
DCHTH
V
DCLTH
V
DCLHYS
V
DCLHYS
V
DCOC
R
DC_IN
I
DC_IN
t
PHLON
t
PLHON
V
_DC
= 80V
V
_DC
= 0V
C
GATE
= 0, Figures 1 and 2
C
GATE
= 0, Figures 1 and 2
V
SENSE
= 0 to V
CC
Rising edge, DC transition from 3.75% to
1.88%
Rising edge, DC transition from 0.94% to
3.75%
-1
2.150
1.075
2.600
1.250
45
45
1.9
57
50
-34
6
1.7
SYMBOL
I
TIMERON
V
ONH
V
ONL
V
ONHYST
I
INON
V
LRIL
,
V
POS_SEL_IL
V
LRIH
,
V
POS_SEL_IH
I
LR_IN
,
I
POS_SEL_IN
V
SGZ
V
OL
I
OH
V
POL_SEL
= 80V
V
POL_SEL
= 0V
V
GATE
- V
OUT
I
O
= 2mA
I
O
= 4mA
V
PWRGD_
= 80V
Temperature rising
+150
20
+3
2.850
1.425
15
4.5
-37
16.4
19
0.4
2.5
10
V
ON
= 0V
-1
0.4
3.2
V
TIMER
= 1V
CONDITIONS
DC = 3.75%, DC = floating
DC = 1.88%, DC = high
DC = 0.94%, DC = low
ON low-to-high transition
ON high-to-low transition
MIN
1.5
0.75
0.37
1.280
1.221
TYP
3
1.5
0.75
1.313
1.233
80
+1
MAX
4.5
2.25
1.12
1.355
1.245
V
V
mV
µA
V
V
µA
V
V
µA
°C
°C
µA
V
V
mV
mV
V
kΩ
µA
µs
µs
µA
UNITS
MAX5934/MAX5934A
_______________________________________________________________________________________
3
Positive High-Voltage, Hot-Swap Controllers with
Selectable Fault Management and Status Polarity
MAX5934/MAX5934A
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +24V (MAX5934A), V
CC
= +48V (MAX5934), GND = 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
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
PHLFB_
t
PLHFB_
t
PHLSENSE
Figures 1, 3
Figures 1, 3
T
A
= +25°C, C
GATE
= 0, Figures 1 and 4
0.5
CONDITIONS
MIN
TYP
3.2
1.5
1.8
2.5
MAX
UNITS
µs
µs
µs
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.
Test Circuit and Timing Diagrams
ON
LATCH/
RETRY
POL_SEL
FB1
V
CC
DC
OUT
SENSE
ON
1.313V
t
PLHON
GATE
5V
1.233V
t
PHLON
1V
5V
5V
5V
5kΩ
PWRGD2
5kΩ
PWRGD1
5kΩ
PWRGD3
GND
MAX5934
MAX5934A
FB2
GATE
TIMER
N.C.
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
4
Figure 4. SENSE-to-GATE Timing
_______________________________________________________________________________________
Positive High-Voltage, Hot-Swap Controllers with
Selectable Fault Management and Status Polarity
Typical Operating Characteristics
(V
CC
= +48V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5934 toc01
MAX5934/MAX5934A
SUPPLY CURRENT vs. TEMPERATURE
MAX5934 toc02
FB_ LOW-VOLTAGE THRESHOLD
vs. TEMPERATURE
1.245
1.240
1.235
1.230
1.225
1.220
1.215
1.210
1.205
MAX5934 toc03
2.7
2.4
2.1
1.8
I
CC
(mA)
1.5
1.2
0.9
0.6
0.3
0
33
40
48
56
V
CC
(V)
64
72
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
3.0
2.5
2.0
I
CC
(mA)
V
CC
= 48V
1.5
1.0
V
CC
= 33V
0.5
0
1.250
FB_ LOW-VOLTAGE THRESHOLD (V)
1.200
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
80
FB_ HIGH-VOLTAGE THRESHOLD
vs. TEMPERATURE
MAX5934 toc04
FB_ HYSTERESIS vs. TEMPERATURE
MAX5934 toc05
I
GATE
PULLUP CURRENT
vs. TEMPERATURE
-6
I
GATE
PULLUP CURRENT (µA)
-7
-8
-9
-10
-11
-12
-13
-40
-15
10
35
60
85
MAX5934 toc06
1.335
FB_ HIGH-VOLTAGE THRESHOLD (V)
1.330
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
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
GATE DRIVE
vs. TEMPERATURE
16
GATE DRIVE (V
GATE
- V
CC
) (V)
15
14
13
12
11
10
9
8
7
-40
-15
10
35
60
85
TEMPERATURE (°C)
V
CC
= +33V
V
CC
= +48V
MAX5934 toc07
GATE DRIVE vs. SUPPLY VOLTAGE
MAX5934 toc08
17
17
16
GATE DRIVE (V
GATE
- V
CC
) (V)
15
14
13
12
11
10
32
40
48
56
V
CC
(V)
64
72
80
_______________________________________________________________________________________
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