Overview
The UCC284DPTR-ADJ is a 500-mA, negative, adjustable low-dropout voltage regulator produced by Texas Instruments. This device is part of the UCC384-x family, which is tailored for low-dropout applications where low-quiescent power is crucial. Fabricated with BCDMOS technology, it is ideally suited for low input-to-output differential applications, making it highly efficient in various power management scenarios.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 500 mA |
| Dropout Voltage | 0.2 V @ 0.5 A |
| Input Voltage Range | 3.2 V to 15 V |
| Output Voltage | 5 V, 12 V, and Adjustable |
| Quiescent Current | Typically 200 uA (max 350 uA with charge pump enabled) |
| Operating Temperature Range | -40°C to +85°C |
| Package | SOIC (D) with 8 pins |
| Thermal Shutdown Temperature | 140°C (turns off, restarts at 120°C) |
Key Features
- Precision Negative Series Pass Voltage Regulation
- Wide Input Voltage Range (3.2 V to 15 V)
- Low Quiescent Current Irrespective of Load
- Simple Logic Shutdown Interfacing
- 2.5% Duty Cycle Short Circuit Protection
- Integrated Charge Pump for Low VIN Conditions
- Thermal-Overload Protection Circuitry
Applications
The UCC284DPTR-ADJ is suitable for a variety of applications requiring low-dropout voltage regulation, such as:
- Power supplies in industrial and automotive systems
- Battery-powered devices where low quiescent current is essential
- Telecommunication equipment requiring stable and efficient voltage regulation
- Medical devices that demand precise and reliable power management
Q & A
- What is the maximum output current of the UCC284DPTR-ADJ?
The maximum output current is 500 mA. - What is the dropout voltage at 0.5 A?
The dropout voltage at 0.5 A is 0.2 V. - What is the input voltage range for this regulator?
The input voltage range is from 3.2 V to 15 V. - How does the quiescent current behave with load current?
The quiescent current does not increase with load current and is typically 200 uA. - What is the thermal shutdown temperature?
The thermal shutdown temperature is 140°C, and the device restarts at 120°C. - How does the short-circuit protection work?
The device turns off after a delay, stays off for 40 times the delay, and then pulses on and off at a 2.5% duty cycle to reduce power dissipation. - Can the UCC284DPTR-ADJ be shut down?
Yes, it can be shut down to 45 uA (maximum) by pulling the SD/CT pin more positive than 0.7 V. - What is the package type and pin count of the UCC284DPTR-ADJ?
The package type is SOIC (D) with 8 pins. - What are the key features of the integrated charge pump?
The integrated charge pump is enabled only when the device operates near dropout with low VIN, ensuring the device meets dropout specifications with a modest increase in quiescent current. - What are some typical applications for this regulator?
Typical applications include power supplies in industrial and automotive systems, battery-powered devices, telecommunication equipment, and medical devices.
