In automotive microcontroller or microprocessor power-supply applications, the watchdog is used to monitor the microcontroller working status to prevent software runaway. It is necessary for the watchdog to be independent of the microcontroller in a reliable system.
The TPS7B63xx-Q1 device is a family of 300-mA watchdog LDOs designed for an operating voltage up to 40 V, with typical quiescent current of only 19 µA at light load. The devices integrate a programmable function for selecting a window watchdog or standard watchdog, with an external resistor to set the watchdog time within 9% accuracy.
The PG pin on the TPS7B63xx-Q1 devices indicate when the output voltage is stable and in regulation. The power-good delay period and power-good threshold can be adjusted by selecting external components. The devices also feature integrated short-circuit and overcurrent protection. The combination of such features makes these devices particularly flexible and suitable to supply microcontroller in automotive applications.
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Iout (Max) (A) |
Output Options |
Vin (Min) (V) |
Vin (Max) (V) |
Fixed Output Options (V) |
Vout (Min) (V) |
Vout (Max) (V) |
Iq (Typ) (mA) |
Vdo (Typ) (mV) |
Accuracy (%) |
PSRR @ 100KHz (dB) |
Output Capacitor Type |
Rating |
Operating Temperature Range (C) |
Pin/Package |
TPS7B63-Q1 | TPS7A63-Q1 | TPS7A6401-Q1 | TPS7B68-Q1 |
---|---|---|---|
0.3 | 0.3 | 0.3 | 0.5 |
Fixed Output | Adjustable Output Fixed Output | Adjustable Output | Fixed Output |
4 | 4 | 4 | 4 |
40 | 40 | 40 | 40 |
3.3 5 | 3.3 5 | 3.3 5 | |
3.3 | 2.5 | 2.5 | 3.3 |
5 | 7 | 7 | 5 |
0.019 | 0.035 | 0.035 | 0.019 |
300 | 300 | 300 | 150 |
2 | 2 | 2 | 2 |
55 | 40 | 40 | 50 |
Ceramic Non-Ceramic | Ceramic | Ceramic | Ceramic |
Automotive | Automotive | Automotive | Automotive |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
16HTSSOP | 10VSON 14HTSSOP | 14HTSSOP | 28HTSSOP |
Order Now | Order Now | Order Now | Order Now |