Overview
The TLV70218DBVT 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 feature low quiescent current, excellent line and load transient performance, and high power-supply rejection ratio (PSRR). The TLV702 series includes a precision bandgap and error amplifier, ensuring an overall output voltage accuracy of 2%. These devices are ideal for battery-operated handheld equipment and other portable applications due to their low noise and low dropout voltage characteristics.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VIN | Input voltage range | 2 | - | 5.5 | V |
| VOUT | DC output accuracy | -2% | 0.5% | 2% | % |
| VDO | Dropout voltage at IOUT = 300 mA, VOUT = 2.8 V | - | 220 mV | - | mV |
| IQ | Quiescent current | - | 35 μA | - | μA |
| PSRR | Power-supply rejection ratio at 1 kHz | - | 68 dB | - | dB |
| tSTR | Start-up time | - | 100 μs | - | μs |
| VEN(high) | Enable pin high (enabled) | 0.9 V | - | VIN | V |
| VEN(low) | Enable pin low (disabled) | 0 V | - | 0.4 V | V |
| IEN | Enable pin current | - | 0.04 μA | - | μA |
| UVLO | Undervoltage lockout | 1.9 V | - | - | V |
| Tsd | Thermal shutdown temperature | 165°C | - | - | °C |
| TJ | Operating junction temperature | -40°C | - | 125°C | °C |
Key Features
- Very Low Dropout Voltage: 37 mV at IOUT = 50 mA, VOUT = 2.8 V; 75 mV at IOUT = 100 mA, VOUT = 2.8 V; 220 mV at IOUT = 300 mA, VOUT = 2.8 V.
- High Accuracy: 2% DC output accuracy over the operating temperature range.
- Low Quiescent Current: 35 μA typical.
- Fixed-Output Voltage Options: Available in fixed-output voltage combinations from 1.2 V to 4.8 V.
- High PSRR: 68 dB at 1 kHz.
- Integrated Protection Features: Thermal shutdown, current limit, and undervoltage lockout (UVLO).
- Low Output Noise: 48 μVRMS output noise voltage over a bandwidth of 100 Hz to 100 kHz.
- Fast Start-Up Time: 100 μs start-up time with a 1 μF output capacitor.
Applications
The TLV70218DBVT is suitable for a variety of power-sensitive applications, including:
- Battery-Operated Handheld Equipment: Ideal for devices that require low power consumption and high efficiency.
- Portable RF Applications: The low noise and high PSRR make it suitable for RF applications where signal integrity is crucial.
- Industrial and Automotive Systems: The device operates over a wide temperature range (-40°C to +125°C), making it suitable for harsh environments.
- Consumer Electronics: Used in devices that require stable and efficient power supply, such as smartphones, tablets, and other portable electronics.
Q & A
- What is the typical quiescent current of the TLV70218DBVT?
The typical quiescent current is 35 μA.
- What is the dropout voltage at 300 mA output current for the TLV70218DBVT?
The dropout voltage is approximately 220 mV at IOUT = 300 mA, VOUT = 2.8 V.
- What is the power-supply rejection ratio (PSRR) of the TLV70218DBVT at 1 kHz?
The PSRR is 68 dB at 1 kHz.
- What are the operating temperature limits for the TLV70218DBVT?
The operating junction temperature range is -40°C to +125°C.
- Does the TLV70218DBVT have built-in protection features?
Yes, it includes thermal shutdown, current limit, and undervoltage lockout (UVLO).
- What is the recommended output capacitor for the TLV70218DBVT?
A 1-μF X5R- or X7R-type ceramic capacitor is recommended for stability.
- How long does it take for the TLV70218DBVT to start up with a 1 μF output capacitor?
The start-up time is approximately 100 μs with a 1 μF output capacitor.
- What is the output noise voltage of the TLV70218DBVT over a bandwidth of 100 Hz to 100 kHz?
The output noise voltage is 48 μVRMS.
- Can the TLV70218DBVT be used in automotive systems?
Yes, it is suitable for automotive systems due to its wide operating temperature range.
- What are the typical applications for the TLV70218DBVT?
Typical applications include battery-operated handheld equipment, portable RF applications, industrial systems, and consumer electronics.
