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PDF MAX5978 Data sheet ( Hoja de datos )
| Número de pieza | MAX5978 | |
| Descripción | Hot-Swap Controller | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX5978 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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19-5328; Rev 0; 7/10
EVAALVUAAILTAIOBNLEKIT
www.DataSheet4U.com
0 to 16V, Hot-Swap Controller with 10-Bit
Current, Voltage Monitor, and 4 LED Drivers
General Description
The MAX5978 hot-swap controller provides complete pro-
tection for systems with a supply voltage from 0 to 16V.
The device includes four programmable LED outputs.
The IC provides two programmable 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 with a trilevel logic input
(IRNG), or by programming through the I2C interface.
The IC 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 at 10ksps. Each 10-bit sample is stored in an
internal circular buffer so that 50 past samples of each
signal can be read back through the I2C interface at any
time or after a fault condition.
The device includes five user-programmable digital
comparators to implement overcurrent warning and two
levels of overvoltage/undervoltage detection. When mea-
sured values violate the programmable limits, an external
ALERT output is asserted. In addition to the ALERT sig-
nal, the IC can be programmed to deassert the power-
good signal and/or turn off the external MOSFET.
The IC features four I/Os that can be independently
configured as general-purpose input/outputs (GPIOs) or
as open-drain LED drivers with programmable blinking.
These four I/Os can be configured for any mix of LED
driver or GPIO function.
The device is available in a 32-pin thin QFN-EP pack-
age and operates over the -40NC to +85NC extended
temperature range.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5978ETJ+
-40NC to +85NC
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Features
S Hot-Swap Controller Operates from 0 to 16V
S 10-Bit ADC Monitors Load Voltage and Current
S Circular Buffers Store 5ms of Current and Voltage
Measurements
S Internal Charge Pump Generates n-Channel
MOSFET Gate Drive
S Internal 500mA Gate Pulldown Current for Fast
Shutdown
S VariableSpeed/Bilevel™ Circuit-Breaker
Protection
S Precision-Voltage Enable Input
S Alert Output Indicates Fault and Warning
Conditions
S Open-Drain Power-Good Output with
Programmable Polarity
S Open-Drain Fault Output
S Four Open-Drain General-Purpose Outputs Sink
25mA to Directly Drive LEDs
S Programmable LED Flashing Function
S Latched-Off Fault Management
S 400kHz I2C Interface
S Small, 5mm x 5mm, 32-Pin TQFN-EP Package
Applications
Blade Servers
DC Power Metering
Disk Drives/DASD/Storage Systems
Soft-Switch for ASICs, FPGAs, and
Microcontrollers
Network Switches/Routers
VariableSpeed/Bilevel is a trademark of Maxim Integrated
Products, Inc.
________________________________________________________________ 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.
1 page  
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0 to 16V, Hot-Swap Controller with 10-Bit
Current, Voltage Monitor, and 4 LED Drivers
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 2.7V to 16V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = 3.3V and TA = +25NC.) (Note 2)
PARAMETER
MON LSB Voltage
MON Code 000H to 001H
Transition Voltage
I2C INTERFACE
Serial-Clock Frequency
Bus Free Time Between
STOP and START Conditions
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
16V range
8V range
4V range
2V range
16V range
8V range
4V range
2V range
CONDITIONS
fSCL
tBUF
tSU:STA
tHD:STA
tSU:STO
tHIGH
tLOW
tSU:DAT
tHD:DAT
tOF
tSP
VIH
VIL
VHYST
Transmit
Receive
CBUS = 10pF to 400pF
VOL ISINK = 4mA
MIN
15.23
7.655
3.811
1.899
10
4.7
2
0.5
1.3
0.6
0.6
0.6
0.6
1.3
100
100
300
1.8
-1
TYP
15.49
7.743
3.875
1.934
25
12
6
3
MAX
15.69
7.811
3.933
1.966
41
21
12
5.5
UNITS
mV
mV
400
900
250
50
0.22
15
0.8
+1
0.4
kHz
Fs
Fs
Fs
Fs
Fs
Fs
ns
ns
ns
ns
V
V
V
FA
pF
V
Note 2: All devices 100% production tested at TA = +25NC. Limits over the temperature range are guaranteed by design.
5
5 Page 
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0 to 16V, Hot-Swap Controller with 10-Bit
Current, Voltage Monitor, and 4 LED Drivers
Typical Operating Circuit
VCC
VS VIN = 2.7V TO 16V ID
SETTING
R1ON
IN A0 A1
ON
R2ON
VCC
R1
R2
R3
µP
VCC
4.7kI
4.7kI
V+
V+ Q1
RLED2
RLED1
RSENSE
TO
LOAD
GATE
SENSE
MAX5978
MON
LED1
LED2
GND
10I
1µF
1µF
RLED3
LED3
LED4
CONFIGURATION
SETTINGS
RLED4
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX5978.PDF ] | |
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