Overview
The TPS79718DCKRG4, part of the TPS797xx family, is a low-dropout voltage regulator (LDO) produced by Texas Instruments. This device is designed to offer ultra-low power operation and low dropout voltage, making it ideal for battery-powered microcontroller and microprocessor applications. The TPS79718DCKRG4 is packaged in a 5-pin SC70 (DCK) package, which minimizes board space consumption due to its miniaturized design. The regulator is stable with any capacitor greater than 0.47 µF and includes an integrated open-drain power good (PG) output, which can be used for power-on reset or low-battery indication.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VI) | 1.8 | - | 5.5 | V |
| Output Voltage (VO) | 1.8 | - | 3.3 | V |
| Output Current (IO) | 0 | - | 50 | mA |
| Input Capacitor (CI) | 0 | - | 0.1 | µF |
| Output Capacitor (CO) | 0.47 | - | 1 | µF |
| Junction Temperature (TJ) | -40 | - | 85 | °C |
| Dropout Voltage (V(DO)) at 10 mA | 110 | - | 200 | mV |
| Ground Pin Current (I(GND)) at 10 mA | 1.2 | - | 2 | µA |
| Power-Supply Rejection Ratio (PSRR) at 100 Hz | 50 | - | - | dB |
Key Features
- 50-mA Low-Dropout Regulator
- Ultra-Low 1.2-µA Quiescent Current at 10 mA
- 5-Pin SC70 (DCK) Package
- Integrated Open Drain Active-High Power Good (PG) Output
- Stable With Any Capacitor Greater Than 0.47 µF
- Typical Dropout Voltage of 105 mV at 10 mA (for TPS79733)
- Over-Current Limitation
- Operating Junction Temperature Range of –40°C to 85°C
Applications
- Battery-Powered Microcontrollers and Microprocessors
- Mixed-Signal Microcontrollers
- Low-Power Devices Requiring Regulated Input Voltage and Power Good Supervisory Signal
The TPS79718DCKRG4 is particularly suited for micropower applications where low dropout voltage and ultra-low quiescent current are crucial. It is often used to power microcontrollers like the TI MSP430, ensuring minimal impact on battery life due to its low power consumption.
Q & A
- What is the typical quiescent current of the TPS79718DCKRG4?
The typical quiescent current is 1.2 µA at 10 mA load current.
- What is the dropout voltage of the TPS79718DCKRG4 at 10 mA load current?
The typical dropout voltage is 110 mV at 10 mA load current.
- What is the recommended output capacitor value for the TPS79718DCKRG4?
The minimum recommended output capacitor value is 0.47 µF.
- What is the operating junction temperature range of the TPS79718DCKRG4?
The operating junction temperature range is –40°C to 85°C.
- Does the TPS79718DCKRG4 have an integrated power good output?
- What is the maximum output current of the TPS79718DCKRG4?
The maximum output current is 50 mA.
- What package type is the TPS79718DCKRG4 available in?
The TPS79718DCKRG4 is available in a 5-pin SC70 (DCK) package.
- How does the power good output function in the TPS79718DCKRG4?
The PG output goes to a high-impedance state when the output voltage exceeds approximately 90% of the regulated voltage and to a low-impedance state when the output voltage falls below approximately 90%.
- What is the power-supply rejection ratio (PSRR) of the TPS79718DCKRG4 at 100 Hz?
The PSRR is 50 dB at 100 Hz.
- Does the TPS79718DCKRG4 have over-current limitation?
