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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16126 Datasheet

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

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MAX16126/MAX16127
Load-Dump/Reverse-Voltage Protection Circuits
General Description
The MAX16126/MAX16127 load-dump/reverse-voltage
protection circuits protect power supplies from damaging
input voltage conditions, including overvoltage, reverse-
voltage, and high-voltage transient pulses. Using a
built-in charge pump, the devices control two external
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 automotive
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 dissipation
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 management
for overvoltage and thermal shutdown conditions; whereas
the MAX16126 provides switch-mode fault management
for overvoltage and thermal shutdown conditions. 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 (-40°C to +125°C).
Benefits and Features
● Increases Protection of Sensitive Electronic
Components in Harsh Environments
• -36V to +90V Wide Input-Voltage Protection Range
• Fast Gate Shutoff During Fault Conditions with
Complete Load Isolation
• Thermal-Shutdown Protection
• Active-Low FLAG Output Identifies Fault Condition
● AEC-Q100 Automotive Qualified
• Operates Down to +3V, Riding Out Cold-Crank
Conditions
• -40°C to +125°C Operating Temperature Range
● Integration Reduces Solution Size
• Internal Charge-Pump Circuit Enhances External
n-Channel MOSFET
• Adjustable Undervoltage/Overvoltage Thresholds
• 3mm x 3mm, 12-Pin TQFN Package
● Reduced Power Dissipation Compared to Discrete
Solutions
• Minimal Operating Voltage Drop for Reverse-
Voltage Protection
350μA (max) Supply Current and 100μA (max)
Shutdown Current at 30V Input
Applications
● Automotive
● Industrial
● Avionics
● Telecom/Server/Networking
Ordering Information appears at end of data sheet.
19-6053; Rev 9; 9/18


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX16126 Datasheet

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

No Preview Available !

MAX16126/MAX16127
Load-Dump/Reverse-Voltage Protection Circuits
Absolute Maximum Ratings
(All pins referenced to GND.)
IN .............................................................................-36V to +90V
SHDN............................................-0.3V to max (0V, VIN + 0.3V)
TERM............................................-0.3V to max (0V, VIN + 0.3V)
SRC, GATE.............................................................-36V to +45V
SRC to GATE..........................................................-36V to +36V
OUT........................................................................-0.3V to +45V
FLAG......................................................................-0.3V to +45V
OVSET, UVSET........................................................-0.3V to +6V
Continuous Sink/Source (all pins)...................................±100mA
Continuous Power Dissipation (TA = +70°C) (multilayer board)
TQFN (derate 14.7mW/°C above +70°C)............... 1176.5mW
Operating Temperature Range.......................... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -60°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°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.
Package Thermal Characteristics (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA)...........68°C/W
Junction-to-Case Thermal Resistance (θJC)................11°C/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.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(VIN = 12V, CGATE-SOURCE = 1nF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Input Voltage Range
Input Supply Current
SRC Input Current
IN Undervoltage Lockout
OVSET/UVSET Input Current
OVSET/UVSET Threshold (Rising)
SYMBOL
CONDITIONS
Operating range
VIN Protection range
VIN = VSRC =
SHDN = high
VOUT = 12V
IIN
VIN = VSRC =
VOUT = 30V
SHDN = low
VIN = 12V
VIN = 30V
ISRC
VSRC = VIN = 12V, SHDN = high
VSRC = VIN = 30V, SHDN = high
VUVLO VIN rising
IUVSET/OVSET
VTH VIN rising
OVSET/UVSET Threshold Hysteresis
VTH-HYS
POK Threshold Rising
VPOK+
POK Threshold Falling
TERM On-Resistance
VPOK-
RTERM
MIN TYP MAX UNITS
3 30
V
-36 +90
224 320
260 350
µA
34 50
64 100
136 200
240 350
µA
2.92
V
100 nA
1.2 1.225 1.25
V
0.05 x
VTH
0.9 x
VIN
0.87 x
VIN
0.7
1.2
V
V
V
kΩ
www.maximintegrated.com
Maxim Integrated 2


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