Overview
The TPS73701DRBT from Texas Instruments is a 1A low-dropout (LDO) voltage regulator designed with advanced BiCMOS technology. This regulator features an NMOS pass transistor in a voltage-follower configuration, which provides high precision, very low dropout voltages, and low ground pin current. It is particularly suited for portable applications due to its low current consumption when not enabled, which is less than 20nA. The device includes thermal shutdown and foldback current limit for enhanced protection and reliability.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| VIN Input voltage range | 2.2 | 5.5 | V | ||
| VFB Internal reference (DCQ package) | TJ = 25°C | 1.198 | 1.204 | 1.21 | V |
| VFB Internal reference (DRB and DRV packages) | TJ = 25°C | 1.192 | 1.204 | 1.216 | V |
| VOUT Output voltage range (TPS73701) | 5.5 | V | |||
| Output voltage accuracy | Nominal TJ = 25°C | -1 | 1 | % | |
| ISC Short-circuit current | VOUT = 0V, legacy silicon | 450 | mA | ||
| ISC Short-circuit current | VOUT = 0V, new silicon | 510 | mA | ||
| IREV Reverse leakage current | VEN ≤ 0.5V, 0V ≤ VIN ≤ VOUT | 0.1 | µA | ||
| IGND Ground pin current | IOUT = 10mA | 400 | µA | ||
| IGND Ground pin current | IOUT = 1A, legacy silicon | 1300 | µA | ||
| IGND Ground pin current | IOUT = 1A, new silicon | 880 | µA | ||
| ISHDN Shutdown current | VEN ≤ 0.5V, VOUT ≤ VIN ≤ 5.5V | 20 | nA | ||
| PSRR Power-supply rejection ratio | f = 100Hz, IOUT = 1A | 58 | dB | ||
| TSD Thermal shutdown temperature | Shutdown, temperature increasing | 160 | °C | ||
| TJ Operating junction temperature | -40 | 125 | °C |
Key Features
- Ultra-Low Dropout Voltage: The TPS73701DRBT features very low dropout voltages, making it suitable for applications where input voltage is close to the output voltage.
- Reverse Current Protection: The device includes reverse current blockage, protecting the regulator from backflow currents.
- Flexible Output Capacitor Options: The NMOS topology allows for a wide variety of load configurations and is relatively insensitive to the output capacitor value and ESR.
- Enable Input: The regulator has an enable pin that allows it to be turned on or off, which is useful for power management in portable devices.
- Thermal and Overcurrent Protection: The device is protected by thermal shutdown and foldback current limit, ensuring reliability and safety.
- Low Ground Pin Current: The regulator has low ground pin current, especially when not enabled, making it energy-efficient for battery-powered devices.
- Adjustable and Fixed Output Voltages: Available in both adjustable and fixed-output voltage versions, offering flexibility in design.
Applications
- Portable Electronics: Ideal for battery-powered devices such as smartphones, tablets, and other handheld electronics due to its low power consumption and high efficiency.
- Industrial Control Systems: Suitable for use in industrial control systems where stable and regulated voltage is required.
- Medical Devices: Can be used in medical devices that require precise voltage regulation and low noise.
- Automotive Systems: Applicable in automotive systems where robust and reliable voltage regulation is necessary.
Q & A
- What is the maximum output current of the TPS73701DRBT?
The TPS73701DRBT can supply up to 1A of output current.
- What are the input voltage range and output voltage range of the TPS73701DRBT?
The input voltage range is 2.2V to 5.5V, and the output voltage range can be adjusted or fixed, with fixed versions available from 1.2V to 5.5V.
- Does the TPS73701DRBT have thermal protection?
Yes, the device includes thermal shutdown and foldback current limit for thermal protection.
- What is the typical ground pin current when the device is enabled?
The typical ground pin current when the device is enabled and delivering 10mA output current is 400µA.
- Can the TPS73701DRBT be used in portable applications?
Yes, it is designed for portable applications due to its low current consumption when not enabled and its overall efficiency.
- What is the significance of the enable pin on the TPS73701DRBT?
The enable pin allows the regulator to be turned on or off, which is useful for power management in battery-powered devices.
- How does the TPS73701DRBT handle reverse current?
The device includes reverse current blockage, protecting the regulator from backflow currents.
- What are the package options available for the TPS73701DRBT?
The device is available in DCQ (SOT-223), DRB (VSON), and DRV (WSON) packages.
- What is the operating junction temperature range of the TPS73701DRBT?
The operating junction temperature range is -40°C to 125°C.
- Does the TPS73701DRBT require specific output capacitors?
No, the NMOS topology allows for a wide variety of load configurations and is relatively insensitive to the output capacitor value and ESR.
