Overview
The TPS75733KTTRG3 is a 3-A low-dropout (LDO) voltage regulator from Texas Instruments, part of the TPS757xx family. This device is designed to provide a stable 3.3-V output voltage and is available in a 5-pin TO-263 (KTT) surface-mount package. It features an open-drain power-good (PG) status output, fast transient response, and low quiescent current. The regulator is suitable for applications requiring high current and low voltage drop, making it ideal for various power management needs.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Output Voltage | 3.3 V | Typical |
| Output Current | Up to 3 A | |
| Dropout Voltage | Typically 150 mV at 3 A | VI = 3.2 V |
| Quiescent Current | 125 µA (typical at full load) | 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 | |
| Power-Good (PG) Trip Threshold Voltage | 89% to 93% of VO | |
| PG Hysteresis Voltage | 0.5% of VO |
Key Features
- Low Dropout Voltage: Typically 150 mV at 3 A output current.
- Low Quiescent Current: 125 µA at full load, dropping to less than 1 µA when disabled.
- Fast Transient Response: Suitable for large load current changes.
- Power-Good (PG) Status Output: Open-drain, active low output indicating the status of the output voltage.
- Thermal Shutdown Protection: Prevents overheating by shutting down the regulator at 150 °C junction temperature.
- Adjustable and Fixed Output Options: Although the TPS75733KTTRG3 is a fixed 3.3-V option, the TPS757xx family includes adjustable and other fixed voltage options.
Applications
The TPS75733KTTRG3 is suitable for a variety of applications requiring high current and low voltage drop, including:
- Power supplies for embedded systems and microcontrollers.
- Industrial control systems and automation.
- Telecommunication equipment and networking devices.
- Medical devices and diagnostic equipment.
- Automotive electronics and infotainment systems.
Q & A
- What is the typical output voltage of the TPS75733KTTRG3?
The typical output voltage is 3.3 V.
- What is the maximum output current of the TPS75733KTTRG3?
The maximum output current is up to 3 A.
- What is the dropout voltage of the TPS75733KTTRG3 at 3 A output current?
The dropout voltage is typically 150 mV at 3 A output current.
- What is the quiescent current of the TPS75733KTTRG3?
The quiescent current is typically 125 µA at full load and less than 1 µA when disabled.
- Does the TPS75733KTTRG3 have thermal shutdown protection?
- What is the purpose of the power-good (PG) status output?
The PG status output indicates the status of the output voltage, going low when the output voltage falls below approximately 89% of the regulated voltage.
- In what package is the TPS75733KTTRG3 available?
The TPS75733KTTRG3 is available in a 5-pin TO-263 (KTT) surface-mount package.
- What is the operating junction temperature range of the TPS75733KTTRG3?
The operating junction temperature range is -40°C to 125°C.
- How does the enable (EN) terminal function?
The EN terminal enables or shuts down the device. A logic high on EN shuts down the device, while a logic low enables it.
- What is the minimum input voltage required for valid PG operation?
The minimum input voltage required for valid PG operation is such that IO(PG) = 300 µA and V(PG) ≤ 0.8 V.
