Automotive, 125°C Operation, 36V Input, 50mA
Voltage Tracker with Reverse Current Protection
S-19720 Series
The voltage tracker that solves the issues affecting an ECU with off-board sensors
- High-accuracy sensing provides safer control.
- Small packages reduce overall footprint.
- Low current consumption lowers ECU standby current.
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.
Applications
Power supply for an automotive ECU off-board ratiometric sensors
| ECU | Off-board ratiometric sensor |
|---|---|
| Inverter | Current sensor |
| On-board Charger | Current sensor |
| BMS | Temperature sensor |
| EPS | Torque sensor |
| Body Control Module | Ambient light sensor |
| HVAC | Temperature sensor |
| Cluster | Fuel sender gauge |
| Engine Control Unit | Angular position sensor |
| Electric Fuel Injection | Pressure sensor |
Automotive Linear Regulator (125°C operation) Product Lineup
Features
| Product name | S-19720 | |||||
|---|---|---|---|---|---|---|
| Automotive | ||||||
| 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. |
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| Package | SOT-23-5, HSNT-6(2025) |
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| Automotive quality | AEC-Q100 qualified | |||||
| Operation temperature range | Ta = -40°C to +125°C | |||||
| Datasheet | |
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