Featues
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Automotive |
● AEC-Q100 Grade 1 Qualified
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LDO Function |
● Wide Input Voltage Range: 3V to 40V ● Fixed 3.3V/5V Output Voltage, ±2% Accuracy● Up to 300mA Output Current ● Low Operation IQ: 16uA ● Low Shutdown ISHDN: 1.5µA ● Stable Control Loop with Wide range of 0.47uF to 200uF capacitance and 0Ω to100Ω ESR ● High PSRR 60dB @ 100Hz● Accurate EN control
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Watchdog Function |
● Window Watchdog ● Adjustable Watchdog Timer
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VBAT Sense Function |
● VBAT UVLO: Open Drain Output to MCU interrupt ● VBAT Sense: Analog Output to MCU ADC sampling ● Dedicated BEN Pin to minimize system IQ
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Protection Function |
● VOUT OV/UV Detection ● Thermal Shutdown and Auto Restart ● Over-Current Protection
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Device operating junction temperature range |
● –40°C to +150°C
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| Others |
● DFN-EP12 Package with Wettable Flanks
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Applications (Automotive 12V System Power Supplier) |
● Infotainment（IVI） ● Body Control Module（Body） ● ADAS ● Power train
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Description
LN22043Q1 is a low quiescent current watchdog LDO with a wide input voltage 
range of 3V to 40V. The series provides 3.3V, 5V fixed outputs anddelivers up to
300mA output current. Typical and a dedicated BEN pin, VBAT sense function can
be achieved by a minimum of peripheral circuit, shutdown current of LN22043Q1 is
less than 1.5uA, while the quiescent current under no-load condition is 16μA.
Watchdog function can provide an independent monitor for microcontrollers.
Window watchdog mode can monitor whether the frequency ofwatchdog service
signal (WDI) is within a preset range. Different fault conditions of missing pulsein
open window and receiving pulse in close window can both be reported on RESET pin.
Theduration of watchdog window can be set by delay capacitor.
LN22043Q1 provides a battery voltage sensefunction. By integrating an independent
switch without sacrificing system quiescent consumption.
LN22043Q1 also features power good indicator, over current protection and over temperature
shutdown with auto restart. The product family are available in DFN-EP12 package with wettable
