19-5128; Rev 0; 1/10
TION KIT
EVALUA BLE
AVAILA
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
General Description
The MAX5970 dual hot-swap controller provides com-
plete protection for systems with two supply voltages
from 0V to +16V. The MAX5970 includes four program-
mable LED outputs. The two hot-swap channels can be
configured to operate as independent hot-swap control-
lers, or as a pair operating together so that both chan-
nels shut down if either channel experiences a fault.
The MAX5970 provides two programmable levels of
overcurrent circuit-breaker protection: a fast-trip thresh-
old 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 logic input IRNG_, or by program-
ming though the I
2
C interface.
The MAX5970 is an advanced hot-swap controller that
monitors voltage and current with an internal 10-bit
ADC which is continuously multiplexed to convert the
output voltage and current of both hot-swap channels at
10ksps. Each 10-bit sample is stored in an internal circu-
lar 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 device includes five user-programmable digital
comparators per hot-swap channel to implement over-
current warning and two levels of overvoltage/undervolt-
age detection. When any of the measured values violates
the programmable limits, an external
ALERT
output is
asserted. In addition to the
ALERT
signal, the MAX5970
can be programmed to deassert the power-good signal
and/or turn off the external MOSFET.
The MAX5970 features four I/Os that can be indepen-
dently configured as general-purpose inputs/outputs
(GPIOs) or as open-drain LED drivers with program-
mable blinking. These four I/Os can be configured for
any mix of LED driver or GPIO function.
The MAX5970 is available in a 36-pin thin QFN-EP pack-
age and operates over the -40NC to +85NC extended
temperature range.
from 0V to +16V
S
10-Bit ADC Monitors Voltage and Current of Each
Features
S
Two Independent Hot-Swap Controllers Operate
MAX5970
Channel
S
Circular Buffers Store 5ms of Current and Voltage
Measurements
S
Two Independent Internal Charge Pumps
Generate n-Channel MOSFET Gate Drives
S
Internal 500mA Gate Pulldown Current for Fast
Shutdown
S
VariableSpeed/BiLevel™ Circuit-Breaker
Protection
S
Independent Precision-Voltage Enable Inputs
S
Alert Output Indicates Fault and Warning
Conditions
S
Independent Power-Good Outputs
S
Independent Fault Outputs
S
Four Open-Drain Outputs Sink 25mA to Directly
Drive LEDs
S
Programmable LED Flashing Function
S
Autoretry or Latched Fault Management
S
400kHz I
2
C Interface
S
Small 6mm x 6mm, 36-Pin TQFN-EP Package
Applications
Single PCI Express
M
Hot-Plug Slot
Blade Servers
Disk Drives/DASD/Storage Systems
Soft-Switch for ASICs, FPGAs, and Microcontrollers
with Independent Core and I/O Voltages
Ordering Information
PART
MAX5970ETX+
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
36 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc.
PCI Express is a registered trademark of PCI-SIG Corp.
_______________________________________________________________
Maxim Integrated Products
1
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.
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
MAX5970
ABSOLUTE MAXIMUM RATINGS
IN, SENSE_, MON_, GATE_ to AGND ..................-0.3V to +30V
LED_ to AGND ......................................................-0.3V to +16V
ON_, SDA, SCL to AGND........................................-0.3V to +6V
REG, DREG, IRNG_, MODE, PROT, A_,
PG_,
ALERT, FAULT_
to AGND ................................ -0.3V to +4V
REG to DREG .......................................................-0.3V to +0.3V
RETRY, HWEN, POL to AGND ................-0.3V to (V
REG
+ 0.3V)
GATE1 to MON1, GATE2 to MON2 ........................-0.3V to +6V
GND_, DGND to AGND .......................................-0.3V to +0.3V
SDA,
ALERT
Current ....................................... -20mA to +50mA
LED_ Current ................................................. -20mA to +100mA
GATE_, MON_, GND_ Current .........................................750mA
All Other Pins Input/Output Current ...................................20mA
Continuous Power Dissipation (T
A
= +70NC)
36-Pin, 6mm x 6mm TQFN
(derate 35.7mW/°C above +70°C).......................... 2857mW**
Junction-to-Ambient Thermal Resistance (B
JA
) (Note 1).. 28NC/W
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal consideration, refer to
www.maxim-ic.com/thermal-tutorial.
**As per JEDEC51 Standard (Multilayer Board)
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
IN
= 2.7V to 16V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= +25NC.) (Note 2)
PARAMETER
Supply Input-Voltage Range
Hot-Swap Voltage Range
Supply Current
Internal LDO Output Voltage
Undervoltage Lockout
Undervoltage Lockout
Hysteresis
MON_, SENSE_ Input-Voltage
Range
SENSE_ Input Current
MON_ Input Current
Current Measurement LSB
Voltage
V
SENSE_
, V
MON_
= 16V
V
SENSE_
, V
MON_
= 16V
25mV range
50mV range
100mV range
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
SENSE_
- V
MON_
= 5mV
V
SENSE_
- V
MON_
= 20mV
V
SENSE_
- V
MON_
= 5mV
V
SENSE_
- V
MON_
= 20mV
V
SENSE_
- V
MON_
= 10mV
V
SENSE_
- V
MON_
= 40mV
V
SENSE_
- V
MON_
= 10mV
V
SENSE_
- V
MON_
= 40mV
-6.57
-6.71
-9.71
-10.24
-4.24
-4.53
-4.50
-4.20
I
IN
REG
UVLO
UVLO
HYS
I
REG
= 0 to 5mA, V
IN
= 2.7V to 16V
V
IN
rising
100
2.49
SYMBOL
V
IN
CONDITIONS
MIN
2.7
0
2.5
2.53
TYP
MAX
16
16
4
2.6
2.7
UNITS
V
V
mA
V
V
mV
CURRENT-MONITORING FUNCTION
0
32
180
24.34
48.39
96.77
+6.22
+6.82
+8.92
+9.36
+3.78
+5.36
+4.00
+4.50
% FS
% FS
FV
16
75
280
V
FA
FA
Current Measurement Error
(25mV Range)
Current Measurement Error
(50mV Range)
2
______________________________________________________________________________________
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 2.7V to 16V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= +25NC.) (Note 2)
PARAMETER
Current Measurement Error
(100mV Range)
SYMBOL
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
V
MON_
= 0V
V
MON_
= 2.5V
to 16V
t
FCB
t
SCB
CONDITIONS
V
SENSE_
- V
MON_
= 20mV
V
SENSE_
- V
MON_
= 80mV
V
SENSE_
- V
MON_
= 20mV
V
SENSE_
- V
MON_
= 80mV
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
Circuit breaker, DAC = 102
Circuit breaker, DAC = 255
MIN
-2.70
-3.63
-3.14
-3.80
-2.106
-2.986
-3.000
-3.500
-3.1188
-4.873
-3.2668
-4.7
-4.7987
-8.9236
-4.9991
-8.262
-1.7965
-1.86
-2.149
-2.2285
-2.3992
-2.5146
-2.4716
-2.7421
-3.3412
-3.8762
-3.2084
-3.8424
2
2.4
1.2
0.6
ms
TYP
MAX
+2.43
+4.56
+3.19
+3.93
+0.888
+0.641
+1.000
+1.500
+0.926
+0.3421
+0.9228
+1.0212
+1.1812
+0.202
+0.6374
+1
+1.5496
+1.5916
+1.9868
+1.9982
+1.8723
+2.1711
+2.181
+2.1152
+2.989
+3.6789
+2.7798
+2.6483
Fs
mV
mV
mV
mV
mV
mV
% FS
UNITS
MAX5970
Fast Current-Limit Threshold
Error (25mV Range)
Fast Current-Limit Threshold
Error (50mV Range)
Fast Current-Limit Threshold
Error (100mV Range)
Slow Current-Limit Threshold
Error (25mV Range)
Slow Current-Limit Threshold
Error (50mV Range)
Slow Current-Limit Threshold
Error (100mV Range)
Fast Circuit-Breaker
Response Time
Slow Current-Limit Response
Time
THREE-STATE INPUTS
A_, IRNG_, MODE, PROT
Low Current
A_, IRNG_, MODE, PROT T
High Current
A_, IRNG_, MODE, PROT
Open Current
I
IN_LOW
I
IN_HIGH
I
FLOAT
Overdrive = 10% of current-sense range
Overdrive = 4% of current-sense range
Overdrive = 8% of current-sense range
Overdrive = 16% of current-sense range
Input voltage = 0.4V
Input voltage = V
REG
- 0.2V
Maximum source/sink current for open state
-40
40
-4
+4
FA
FA
FA
_______________________________________________________________________________________
3
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
MAX5970
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 2.7V to 16V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= +25NC.) (Note 2)
PARAMETER
A_, IRNG_, MODE, PROT
Low Voltage
A_, IRNG_, MODE, PROT
High Voltage
TWO-STATE INPUTS
ON_ Input Voltage
ON_ Input Hysteresis
ON_ Input Current
TIMING
50
MON_ to PG_ Delay
Register configurable
(see Tables 31a and 31b)
100
200
400
CHARGE PUMP (GATE_)
Charge-Pump Output Voltage
Charge-Pump Output Source
Current
GATE_ Discharge Current
I
G(UP)
I
G(DN)
V
GATE_
- V
MON_
= 2V
I
SINK
= 3.2mA
Relative to MON_, I
GATE
= 0
4.5
4
5.1
5
500
0.2
1
V
IL
V
IH
V
OL
I
GPIO_IX
I
LED_
= 25mA
V
LED_
= 16V
-1
2
10
INL
Two voltage and two current-sense conversion
16V range
MON_ LSB Voltage
8V range
4V range
2V range
16V range
MON_ Code 000H to 001H
Transition Voltage
8V range
4V range
2V range
95
15.23
7.655
3.811
1.899
10
4.7
2
0.5
1
100
15.49
7.743
3.875
1.934
25
12
6
3
110
15.69
7.811
3.933
1.966
41
21
12
5.5
mV
mV
1.4
0.7
+1
0.4
5.5
6
V
FA
mA
V
FA
V
V
V
FA
FA
Bits
LSB
Fs
ms
V
ON_
V
ON_HYS
-100
0.582
0.592
4
+100
0.602
V
%
nA
SYMBOL
CONDITIONS
Relative to AGND
Relative to REG
-0.24
MIN
TYP
MAX
0.4
UNITS
V
V
OUTPUT (FAULT_, PG_,
ALERT)
Output-Voltage Low
Output Leakage Current
LED INPUT/OUTPUT
LED_ Input Threshold Low Level
LED_ Input Threshold High Level
LED_ Output Low
LED_ Input Leakage Current
(Open Drain)
LED_ Weak Pullup Current
ADC PERFORMANCE
Resolution
Maximum Integral Nonlinearity
ADC Total Monitoring Cycle
Time
I
PU_WEAK
V
LED_
= V
IN
- 0.65V
4
______________________________________________________________________________________
0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 2.7V to 16V, T
A
= -40NC to +85NC, unless otherwise noted. Typical values are at V
IN
= 3.3V and T
A
= +25NC.) (Note 2)
PARAMETER
I
2
C
iNTERFACE
f
SCL
t
BUF
t
SU:STA
t
HD:STA
t
SU:STO
t
HIGH
t
LOW
t
SU:DAT
t
HD:DAT
t
OF
t
SP
V
IH
V
IL
V
HYST
-1
15
V
OL
I
SINK
= 4mA
0.4
0.22
+1
1.8
0.8
Transmit
Receive
C
BUS
= 10pF to 400pF
50
1.3
0.6
0.6
0.6
0.6
1.3
100
100
300
900
250
400
kHz
Fs
Fs
Fs
Fs
Fs
Fs
ns
ns
ns
ns
V
V
V
FA
pF
V
Serial-Clock Frequency
Bus Free Time Between
STOP and START Condition
START Condition Setup Time
START Condition Hold Time
STOP Condition Setup Time
Clock High Period
Clock Low Period
Data Setup Time
Data Hold Time
Output Fall Time
Pulse Width of Spike
Suppressed
SDA, SCL Input High Voltage
SDA, SCL Input Low Voltage
SDA, SCL Input Hysteresis
SDA, SCL Input Current
SDA, SCL Input Capacitance
SDA Output Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5970
Note 2:
All devices are 100% production tested at T
A
= +25NC. Limits over the temperature range are guaranteed by design.
Typical Operating Characteristics
(V
IN
= 3.3V, T
A
= +25NC, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5970 toc01
SUPPLY CURRENT vs. TEMPERATURE
MAX5970 toc02
GATE-DRIVE VOLTAGE vs. V
MON_
5.15
GATE-DRIVE VOLTAGE (V)
5.10
5.05
5.00
4.95
4.90
4.85
4.80
V
GATE
REFERRED TO MON_
MAX5970 toc03
2.50
3.0
2.9
2.8
SUPPLY CURRENT (mA)
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
5.20
SUPPLY CURRENT (mA)
2.45
BOTH CHANNELS ON
2.40
2.35
BOTH CHANNELS OFF
2.30
0
2
4
6
8
10
12
14
16
SUPPLY VOLTAGE (V)
-40
-15
10
35
60
85
0
2
4
6
8
10
12
14
16
TEMPERATURE (°C)
V
MON_
(V)
_______________________________________________________________________________________
5
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