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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16126 Datasheet

(MAX16126 / MAX16127) Load-Dump/Reverse-Voltage Protection Circuits

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19-6053; Rev 0; 11/11
MAX16126/MAX16127
Load-Dump/Reverse-Voltage Protection Circuits
General Description
The MAX16126/MAX16127 load-dump/reverse-voltage
protection circuits protect power supplies from dam-
aging input voltage conditions, including overvoltage,
reverse-voltage, and high-voltage transient pulses. Using
a built-in charge pump, the devices control two exter-
nal back-to-back n-channel MOSFETs that turn off and
isolate downstream power supplies during damaging
input conditions, such as an automotive load-dump pulse
or a reverse-battery condition. Operation is guaranteed
down to 3V to ensure proper operation during automo-
tive cold-crank conditions. These devices feature a flag
output (FLAG) that asserts during fault conditions.
For reverse-voltage protection, external back-to-back
MOSFETs outperform the traditional reverse-battery
diode, minimizing the voltage drop and power dissipa-
tion during normal operation.
The MAX16126/MAX16127 use external resistors to
adjust the overvoltage and undervoltage comparator
thresholds for maximum flexibility.
The MAX16127 provides limiter-mode fault manage-
ment for overvoltage and thermal shutdown conditions;
whereas the MAX16126 provides switch-mode fault
management for overvoltage and thermal shutdown con-
ditions. In the limiter mode, the output voltage is limited
and FLAG is asserted low during a fault. In the switch
mode, the external MOSFETs are switched off and FLAG
is asserted low after a fault. The switch mode is available
in four options: latch mode, 1 autoretry mode, 3 autoretry
mode, and always autoretry mode.
The MAX16126/MAX16127 are available in 12-pin TQFN
packages. These devices operate over the automotive
temperature range (-40NC to +125NC).
Applications
Automotive
Industrial
Avionics
Telecom/Server/Networking
Benefits and Features
S Operates Down to +3V, Riding Out Cold-Crank
Conditions
S -30V to +90V Wide Input Voltage Protection Range
S Minimal Operating Voltage Drop Reverse-Voltage
Protection
S Fast Gate Shutoff During Fault Conditions with
Complete Load Isolation
S Adjustable Undervoltage/Overvoltage Thresholds
S Thermal Shutdown Protection
S Low Supply Current and Low Shutdown Current
S Charge-Pump Circuit Enhances External
n-Channel MOSFETs
S FLAG Output Identifies Fault Condition
S Automotive Qualified
S -40NC to +125NC Operating Temperature Range
S Available in 3mm x 3mm, 12-Pin TQFN Package
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX16126.related.
����������������������������������������������������������������� 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.
Datasheet pdf - http://www.DataSheet4U.net/


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16126 Datasheet

(MAX16126 / MAX16127) Load-Dump/Reverse-Voltage Protection Circuits

No Preview Available !

www.DataSheet.co.kr
MAX16126/MAX16127
Load-Dump/Reverse-Voltage Protection Circuits
ABSOLUTE MAXIMUM RATINGS
(All pins referenced to GND.)
IN .............................................................................-30V to +90V
SHDN.............................................-0.3V to max (0V, VIN + 0.3V)
TERM.............................................-0.3V to max (0V, VIN + 0.3V)
SRC, GATE..............................................................-30V to +45V
SRC to GATE...........................................................-30V to +30V
OUT........................................................................-0.3V to +45V
FLAG......................................................................-0.3V to +45V
OVSET, UVSET.........................................................-0.3V to +6V
Continuous Sink/Source (all pins).................................. Q100mA
Continuous Power Dissipation (TA = +70NC) (multilayer board)
TQFN (derate 14.7mW/NC above +70NC)...............1176.5mW
Operating Temperature Range......................... -40NC to +125NC
Junction Temperature......................................................+150NC
Storage Temperature Range............................. -60NC to +150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (BJA)...........68NC/W
Junction-to-Case Thermal Resistance (BJC)................11NC/W
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 considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VIN = 12V, CGATE-SOURCE = 1nF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
Input Voltage Range
Input Supply Current
SRC Input Current
IN Undervoltage Lockout
OVSET/UVSET Input Current
OVSET/UVSET Threshold (Rising)
OVSET/UVSET Threshold Hysteresis
POK Threshold Rising
POK Threshold Falling
TERM On-Resistance
Startup Response Time
Autoretry Timeout
GATE Rise Time
OVSET to GATE Propagation Delay
SYMBOL
CONDITIONS
VIN
Operating range
Protection range
IIN
SHDN = high
SHDN = low
ISRC
VUVLO
VIN rising
IUVSET/OVSET
VTH VIN rising
VTH-HYS
VPOK+
VPOK-
RTERM
tSTART
(Note 3)
tRETRY
tRISE
VGATE rising (GND to VSRC + 6V)
tOVG
VOVSET rising (VTH - 100mV to
VTH + 100mV)
MIN TYP MAX
3 24
-30 +90
224 320
34 50
75 110
2.8
500
1.2 1.225 1.25
5
0.9 x VIN
0.87 x VIN
0.7
1.2
150
150
1
0.55
UNITS
V
FA
FA
V
nA
V
%
V
V
kI
Fs
ms
ms
Fs
UVSET to GATE Propagation Delay
tUVG
VUVSET rising (VTH - 100mV to
VTH +100mV)
20 Fs
����������������������������������������������������������������� Maxim Integrated Products  2
Datasheet pdf - http://www.DataSheet4U.net/


Part Number MAX16126
Description (MAX16126 / MAX16127) Load-Dump/Reverse-Voltage Protection Circuits
Maker Maxim Integrated Products
Total Page 19 Pages
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