- Ultra-Low IQ: 2.5 µA
- Input Voltage: 2.4 V to 18 V
- Output Voltage Options Available:
- Fixed: 1.25 V to 5 V
- Adjustable: 1.24 V to 17.45V
- 1% Accuracy Over Temperature
- Low Dropout: 550 mV (max) at 500 mA
- Open-Drain Power-Good Output
- Internal Soft-Start Limits Inrush Current
- Thermal Shutdown and Overcurrent Protection
- Operating Junction Temperature: –40°C to +125°C
- Stable With 1-µF Output Capacitor
- Packages: WSON-6
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The TPS7A26 low-dropout linear voltage regulator (LDO) introduces a unique combination ofa 2.4-V to 18-V input voltage range with very-low quiescent current (IQ).These features help modern appliances meet increasingly stringent energy requirements, and helpextend battery life in portable-power solutions.
The TPS7A26 is available in both fixed and adjustable versions. The fixed-voltage versioneliminates external resistors and minimizes printed circuit board (PCB) area. For more flexibilityor higher output voltages, the adjustable version uses feedback resistors to set the output voltagefrom 1.24 V to 17.45 V. Both versions have 1% output regulation accuracy that provides precisionregulation for most Micro-Controller Units (MCUs).
The TPS7A26 LDO operates more efficiently than standard linear regulators because themaximum dropout voltage is less than 550 mV at 500 mA of current. This maximum dropout voltageallows for 89% efficiency from a 5.6-V input voltage (VIN) to
5.0-V output voltage (VOUT).
The power good (PG) indicator can be used to either hold an MCU in reset until power isgood, or for sequencing. The PG pin is an open-drain output; therefore, the pin is easilylevel-shifted for monitoring by a rail other than VOUT. The built-in currentlimit and thermal shutdown help to protect the regulator in the event of a load short or fault.