Overview
The TPS75533KTTRG3 is a 5-A low-dropout (LDO) voltage regulator from Texas Instruments, part of the TPS755xx family. This device is designed to provide a fixed output voltage of 3.3 V and is available in a 5-pin TO-263 (KTT) surface-mount package. It features an integrated power-good (PG) status output and is capable of supplying 5 A of output current with a low dropout voltage of typically 250 mV. The regulator is known for its fast transient response, low quiescent current, and thermal shutdown protection, making it suitable for a variety of applications, especially in battery-powered systems.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Output Voltage | 3.3 V | Fixed |
| Output Current | Up to 5 A | |
| Dropout Voltage | Typically 250 mV at 5 A | |
| Quiescent Current | Typically 125 µA | Full load |
| Quiescent Current (Shutdown) | Less than 1 µA | TJ = 25°C |
| Output Voltage Tolerance | ±3% over line, load, and temperature | |
| Thermal Shutdown Junction Temperature | 150°C | |
| Package Type | 5-pin TO-263 (KTT) | |
| Operating Junction Temperature Range | −40°C to 125°C |
Key Features
- Integrated power-good (PG) status output for fixed voltage options.
- Low dropout voltage of typically 250 mV at 5 A.
- Low quiescent current of typically 125 µA over the full range of output current.
- Fast transient response for large load current changes.
- Thermal shutdown protection.
- Enable (EN) input for shutdown control; applying a TTL high signal shuts down the regulator.
- Available in 5-pin TO-263 (KTT) surface-mount package.
Applications
The TPS75533KTTRG3 is suitable for various applications requiring a high-current, low-dropout voltage regulator. These include:
- Battery-powered systems where low quiescent current is crucial for extended battery life.
- Power supply systems requiring high current output with minimal voltage drop.
- Industrial and automotive systems that need robust and reliable voltage regulation.
- Telecommunication and networking equipment where stable voltage supply is essential.
Q & A
- What is the output voltage of the TPS75533KTTRG3?
The output voltage of the TPS75533KTTRG3 is 3.3 V.
- What is the maximum output current of the TPS75533KTTRG3?
The maximum output current is up to 5 A.
- What is the typical dropout voltage of the TPS75533KTTRG3 at 5 A output current?
The typical dropout voltage is 250 mV at 5 A output current.
- How does the enable (EN) input control the regulator?
The regulator is enabled when the EN input is connected to a low-level voltage. Applying a TTL high signal to EN shuts down the regulator.
- What is the purpose of the power-good (PG) terminal?
The PG terminal is an open drain, active low output that indicates the status of the output voltage (VO). It can be used to implement a power-on reset or a low-battery indicator.
- What is the thermal shutdown junction temperature of the TPS75533KTTRG3?
The thermal shutdown junction temperature is 150°C.
- In what package is the TPS75533KTTRG3 available?
The TPS75533KTTRG3 is available in a 5-pin TO-263 (KTT) surface-mount package.
- What is the operating junction temperature range of the TPS75533KTTRG3?
The operating junction temperature range is −40°C to 125°C.
- How does the quiescent current behave in shutdown mode?
In shutdown mode, the quiescent current reduces to less than 1 µA at TJ = 25°C.
- What is the output voltage tolerance of the TPS75533KTTRG3?
The output voltage tolerance is ±3% over line, load, and temperature ranges.
