Overview
The TPS76733QD is a fast-transient-response, 1-A low-dropout linear voltage regulator produced by Texas Instruments. This device is part of the TPS767xx family, which offers a range of fixed and adjustable output voltage options. The TPS76733QD specifically provides a fixed output voltage of 3.3 V, making it suitable for various applications requiring stable and efficient voltage regulation.
This regulator features a PMOS pass element, which results in a very low dropout voltage of typically 230 mV at an output current of 1 A. It also boasts an ultralow quiescent current of 85 µA, significantly improving the operating life of battery-powered systems. The device includes thermal shutdown protection, an open-drain power-on reset with a 200-ms delay, and a sleep mode to further reduce power consumption.
Key Specifications
| Parameter | Test Conditions | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| Output Voltage | TJ = 25°C, 4.3 V < VIN < 10 V | 3.2346 | 3.3 | 3.366 | V |
| Output Voltage (over temperature range) | TJ = −40°C to 125°C, 4.3 V < VIN < 10 V | 3.2346 | - | 3.366 | V |
| Dropout Voltage | IO = 1 A, TJ = 25°C | 350 | - | 575 | mV |
| Quiescent Current | EN = 0 V, IO = 0 mA to 1 A | - | 85 | 125 | µA |
| Output Current Limit | VO = 0 V | 1.2 | - | 1.7 | A |
| Thermal Shutdown Junction Temperature | - | - | - | 150 | °C |
| Input Voltage Range | - | 2.7 | - | 10 | V |
| Operating Junction Temperature Range | - | −40 | - | 125 | °C |
Key Features
- Low Dropout Voltage: Down to 230 mV at 1 A for the TPS76750, and typically 350 mV for the TPS76733QD.
- Ultralow Quiescent Current: Typically 85 µA over the full range of output current, reducing power consumption in standby mode to 1 µA.
- Fast Transient Response: Ensures stable output voltage under rapid changes in load current.
- High Accuracy: 2% tolerance over specified conditions for fixed-output versions.
- Thermal Shutdown Protection: Prevents overheating by shutting down the regulator when the junction temperature exceeds 150°C.
- Open Drain Power-On Reset: With a 200-ms delay, providing a clean startup sequence.
- Sleep Mode: Reduces quiescent current to 1 µA when the enable pin is set high.
- High Power Supply Ripple Rejection (PSRR): Up to 60 dB at 1 kHz.
Applications
- Battery-Powered Systems: The low quiescent current and low dropout voltage make it ideal for extending battery life.
- Portable Electronics: Suitable for use in handheld devices, smartphones, and other portable electronic devices.
- Industrial Control Systems: Can be used in various industrial applications requiring stable voltage regulation.
- Automotive Systems: Applicable in automotive electronics where reliable and efficient voltage regulation is crucial.
- Medical Devices: Used in medical equipment that requires precise and stable voltage supply.
Q & A
- What is the output voltage of the TPS76733QD?
The TPS76733QD provides a fixed output voltage of 3.3 V.
- What is the typical dropout voltage of the TPS76733QD at 1 A output current?
The typical dropout voltage is 350 mV at 1 A output current.
- What is the quiescent current of the TPS76733QD?
The quiescent current is typically 85 µA over the full range of output current.
- Does the TPS76733QD have thermal shutdown protection?
- How does the sleep mode function in the TPS76733QD?
The sleep mode reduces the quiescent current to 1 µA when the enable pin is set high.
- What is the power supply ripple rejection (PSRR) of the TPS76733QD?
The PSRR is up to 60 dB at 1 kHz.
- What are the package options for the TPS76733QD?
The device is available in 8-pin SOIC and 20-pin TSSOP PowerPAD™ packages.
- What is the operating junction temperature range for the TPS76733QD?
The operating junction temperature range is from −40°C to 125°C.
- Does the TPS76733QD have an open-drain power-on reset feature?
- What is the typical output noise voltage of the TPS76733QD?
The typical output noise voltage is 55 µVrms over a bandwidth of 200 Hz to 100 kHz.
