Overview
The TPS7A02, specifically the TPS7A0230PDBVR model from Texas Instruments, is an ultra-low quiescent current (IQ) low-dropout linear regulator (LDO) designed for applications requiring minimal power consumption. This device is part of the TPS7A02 family and is packaged in a 5-pin SOT-23 (DBV) package. It is optimized for battery-powered devices and other applications where low power consumption is critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 200 | mA |
| Quiescent Current (IQ) | 25 | nA (typ) |
| Shutdown IQ | 3 | nA (typ) |
| Output Voltage Range | 0.8 to 5.0 | V (in 50-mV steps) |
| Dropout Voltage | VIN - VOUT = 0.5 V or 2.0 V (whichever is greater) | V |
| Operating Junction Temperature | -40 to 125 | °C |
| Package Type | SOT-23-5 (DBV) | |
| Thermal Resistance (RθJA) | 181.9 | °C/W |
| Start-up Time | 500 to 1600 | μs |
| Power-Supply Rejection Ratio (PSRR) | 55 | dB (at f = 1 kHz, IOUT = 30 mA) |
| Output Voltage Noise | 130 | μVRMS (BW = 10 Hz to 100 kHz, VOUT = 0.8 V, IOUT = 30 mA) |
Key Features
- Ultra-low Quiescent Current: 25 nA (typ) even in dropout mode, and 3 nA (typ) in shutdown mode, extending battery life.
- Excellent Transient Response: Less than 10-μs settling time for load transients from 1 mA to 50 mA.
- Smart Enable Circuit: Features an internally controlled pulldown resistor, minimizing external components and current drawn through the external pulldown circuit.
- Wide Output Voltage Range: Available in steps of 50 mV from 0.8 V to 5.0 V, supporting lower core voltages of modern microcontrollers.
- High Accuracy and Stability: Maintains output voltage accuracy across a wide range of input voltages and temperatures.
- Compact Packages: Available in ultra-small packages such as X2SON, DSBGA, and SOT-23-5.
Applications
- Battery-Powered Devices: Ideal for devices where low power consumption is critical, such as wearables, IoT devices, and portable electronics.
- Low-Power Microcontrollers: Supports the lower core voltages of modern microcontrollers.
- Sensor Networks: Suitable for sensor networks and other low-power sensing applications.
- Industrial Automation: Can be used in low-power industrial automation and control systems.
- Medical Devices: Applicable in medical devices that require low power consumption and high reliability.
Q & A
- What is the typical quiescent current of the TPS7A02?
The typical quiescent current (IQ) of the TPS7A02 is 25 nA, even in dropout mode, and 3 nA in shutdown mode. - What is the maximum output current of the TPS7A02?
The TPS7A02 can source up to 200 mA of output current. - What is the output voltage range of the TPS7A02?
The output voltage range is from 0.8 V to 5.0 V, available in 50-mV steps. - What is the operating junction temperature range of the TPS7A02?
The operating junction temperature range is from -40°C to +125°C. - What packages are available for the TPS7A02?
The TPS7A02 is available in X2SON, DSBGA, and SOT-23-5 packages. - How does the smart enable circuit work?
The smart enable circuit features an internally controlled pulldown resistor, which keeps the LDO disabled when the EN pin is left floating and minimizes the current drawn through the external pulldown circuit. - What is the start-up time of the TPS7A02?
The start-up time ranges from 500 to 1600 μs, depending on the output voltage. - What is the power-supply rejection ratio (PSRR) of the TPS7A02?
The PSRR is 55 dB at f = 1 kHz and IOUT = 30 mA. - What is the output voltage noise of the TPS7A02?
The output voltage noise is 130 μVRMS over a bandwidth of 10 Hz to 100 kHz, with VOUT = 0.8 V and IOUT = 30 mA. - What are some typical applications of the TPS7A02?
Typical applications include battery-powered devices, low-power microcontrollers, sensor networks, industrial automation, and medical devices.
