Automotive, 125°C Operation, 36V Input, 50mA
Voltage Tracker with Reverse Current Protection
Low offset voltage, small size and low current consumption
contribute to higher-accuracy sensing
Contributes to higher-accuracy sensing
The electrification of automobiles and the introduction of Advanced Driver Assistance Systems (ADAS) mean a great variety of sensors has to be installed to enable high accuracy for safe control.
The S-19720 is a voltage tracker with the industry’s lowest offset voltage of ±5mV.
This helps keep the power supply voltage of the off-board ratiometric sensor equal to the reference voltage (Vref) of the AD converter (ADC) handling ECU measurements, raising sensor reading accuracy.
» What is a Voltage Tracker?
Reduces overall footprint
The voltage tracker with its 36V input and 50mA output current is housed in an HSNT-6(2025), the industry’s smallest package.
The S-19720 helps further reduce the footprint of automotive devices.
The S-19720 also integrates an overcurrent protection circuit, a thermal shutdown circuit and a reverse current protection function.
As a result, it will protect an ECU even in the event of a short to power / short to ground in a wire harness.
Lowers ECU standby current
When IG is off, off-board sensors such as current sensors, ambient light sensors do not need to perform sensing; therefore, they are not supplied power by a tracker. However, the reverse current protection function, which protects an ECU even in the event of a short to power in a wire harness, has to continue to operate.
The S-19720 achieves the industry's lowest class current consumption during power-off of 4µA typ. when this function operates.
Power supply for an automotive ECU off-board ratiometric sensors
|ECU||Off-board ratiometric sensor|
|On-board Charger||Current sensor|
|Body Control Module||Ambient light sensor|
|Cluster||Fuel sender gauge|
|Engine Control Unit||Angular position sensor|
|Electric Fuel Injection||Pressure sensor|
Automotive Linear Regulator (125°C operation) Product Lineup
|Input voltage||4.0V to 36.0V|
|Offset voltage||±5mV (0.1mA ≤ IOUT ≤ 50mA)|
|Dropout voltage||160mV typ. (VADJ / EN = 4.0V, IOUT = 10mA)|
|Output current||Possible to output 50mA (VIN = VADJ / EN + 2.0V)|
|Current consumption||During operation: 30µA typ.
During power-off: 4.0μA typ.
|Automotive quality||AEC-Q100 qualified|
|Operation temperature range||Ta = -40°C to +125°C|