Voltage Regulator
The one that keeps your circuits singing!
🛆 Brief description
A voltage regulator is always essential in electronic projects. It provides a constant, low-noise supply voltage. A regulator can only provide one supply voltage. On this board, all components require a supply voltage of 3.3V. Therefore, a single voltage regulator is implemented.
🛆 Voltage Regulator Chip
The TPS7A02 is an ultra-small, ultra-low quiescent current, low dropout linear regulator (LDO) widely used in electronic applications.
The device has very low power consumption (around 25nA), making it ideal for power management applications. In addition, this LDO can deliver up to 200mA, which is sufficient for the tracker's power requirements.
Technological capabilities
🛆 Hardware Integration
Pin Configuration & Description
The TPS7A02 IC is available in two packages: 4-pin X2SON (1x1mm) or 5-pin SOT-23 (2.9x2.8mm). I chose the SOT-23 package because it's easier to debug if necessary. The voltage regulator is a critical component on a board. It's important to be able to replace it if necessary.
The available pins are listed in the table below:
Kicad - Rooting
The voltage regulator chip is wired according to the data sheet (see page 26). A 1µF input and output is used for load transient response. Pin 4 is left floating and pin 3 is wired to the input voltage (voltage coming from the battery).
🛆 Documentation
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