Overview
The TLV70218DBVR is a part of the TLV702 series of low-dropout (LDO) linear regulators produced by Texas Instruments. These regulators are designed for power-sensitive applications and are characterized by their low quiescent current, excellent line and load transient performance, and high power-supply rejection ratio (PSRR). The TLV70218DBVR is specifically a 300-mA, fixed 1.8V output regulator, making it ideal for battery-operated handheld equipment and other applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Output Current (IOUT) | 300 mA | VIN = VOUT + 0.5 V |
| Quiescent Current (IQ) | 370 μA | VIN = VOUT + 0.5 V, IOUT = 10 mA |
| Shutdown Current | 400 nA | VEN ≤ 0.4 V, 2 V ≤ VIN ≤ 4.5 V, TJ = –40°C to +85°C |
| Power-Supply Rejection Ratio (PSRR) | 68 dB | VIN = 2.3 V, VOUT = 1.8 V, IOUT = 10 mA, f = 1 kHz |
| Output Noise Voltage | 48 μVRMS | BW = 100 Hz to 100 kHz, VIN = 2.3 V, VOUT = 1.8 V, IOUT = 10 mA |
| Start-Up Time | 100 μs | COUT = 1 μF, IOUT = 300 mA |
| Enable Pin Voltage (VEN) | 0.9 VIN (high), 0.4 V (low) | |
| Undervoltage Lockout (UVLO) | 1.9 V (rising) | |
| Package | SOT-23-5, WSON-6 |
Key Features
- Low Quiescent Current: The TLV70218DBVR has a low quiescent current of 370 μA, making it suitable for power-sensitive applications.
- High PSRR: It features a high power-supply rejection ratio of 68 dB at 1 kHz, ensuring stable output voltage despite input voltage variations.
- Low Dropout Voltage: The regulator has a low dropout voltage, which is beneficial for applications where the input voltage is close to the output voltage.
- Precision Bandgap and Error Amplifier: Provides overall 2% accuracy in output voltage regulation.
- Thermal Shutdown and Current Limit: Integrated safety features to protect the device from overheating and overcurrent conditions.
- Active Pulldown (TLV702P): Quickly discharges the output when the device is disabled.
- Stability with Low Output Capacitance: Stable operation with an effective output capacitance as low as 0.1 μF.
Applications
- Battery-Operated Handheld Equipment: Ideal for devices such as smartphones, tablets, and other portable electronics.
- Wireless Communication Devices: Suitable for use in wireless modules, Bluetooth devices, and other communication equipment.
- Medical Devices: Can be used in medical devices that require stable and efficient power supply.
- Industrial Automation: Applicable in various industrial automation systems requiring reliable voltage regulation.
Q & A
- What is the maximum output current of the TLV70218DBVR?
The maximum output current is 300 mA.
- What is the typical quiescent current of the TLV70218DBVR?
The typical quiescent current is 370 μA.
- What is the power-supply rejection ratio (PSRR) of the TLV70218DBVR?
The PSRR is 68 dB at 1 kHz.
- What are the package options for the TLV70218DBVR?
The device is available in SOT-23-5 and WSON-6 packages.
- Does the TLV70218DBVR have built-in safety features?
Yes, it includes thermal shutdown, current limit, and undervoltage lockout (UVLO).
- What is the minimum output capacitance required for stable operation?
The device is stable with an effective output capacitance as low as 0.1 μF.
- How does the TLV70218DBVR handle startup time?
The start-up time is approximately 100 μs with a 1 μF output capacitor and 300 mA output current.
- What is the enable pin voltage range for the TLV70218DBVR?
The enable pin voltage range is 0.9 VIN (high) and 0.4 V (low).
- Is the TLV70218DBVR suitable for battery-operated devices?
Yes, it is designed for power-sensitive applications and is ideal for battery-operated handheld equipment.
- Does the TLV702P series have an active pulldown feature?
Yes, the TLV702P series includes an active pulldown circuit to quickly discharge the outputs when disabled.
