Overview
The UA7810CKTTR, produced by Texas Instruments, is part of the µA78xx series of fixed-voltage integrated-circuit voltage regulators. These regulators are designed for a wide range of applications, including on-card regulation to eliminate noise and distribution problems associated with single-point regulation. Each regulator in this series can deliver up to 1.5 A of output current and features internal current-limiting and thermal-shutdown protections, making them robust against overload conditions.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| Output Voltage | IO = 5 mA to 1 A, VI = 12.5 V to 25 V | V | 9.6 | 10 | 10.4 |
| Input Voltage Regulation | VI = 12.5 V to 28 V | mV | 7 | 200 | |
| Ripple Rejection | VI = 13 V to 23 V, f = 120 Hz | dB | 55 | 71 | |
| Output Voltage Regulation | IO = 250 mA to 750 mA | mV | 4 | 100 | |
| Output Resistance | f = 1 kHz | Ω | 0.018 | ||
| Temperature Coefficient of Output Voltage | IO = 5 mA, 0°C to 125°C | mV/°C | -1 | ||
| Output Noise Voltage | f = 10 Hz to 100 kHz, 25°C | μV | 70 | ||
| Dropout Voltage | IO = 1 A, 25°C | V | 2 | ||
| Bias Current | 25°C | mA | 4.3 | 8 | |
| Short-Circuit Output Current | 25°C | mA | 400 | ||
| Peak Output Current | 25°C | A | 2.2 |
Key Features
- 3-Terminal Regulators: Simple and compact design with input, output, and ground terminals.
- Fixed Output Voltages: Available in fixed output voltages of 5 V, 8 V, 10 V, 12 V, 15 V, and 24 V.
- High Output Current: Capable of delivering up to 1.5 A of output current.
- Internal Thermal-Overload Protection: Reduces output current to lower the device temperature in case of overheating.
- Short-Circuit Current Limiting: Limits the output current to safe levels in the event of a short circuit.
- High Power-Dissipation Capability: Efficient in handling high power dissipation requirements.
- Low Output Noise and Ripple Rejection: Ensures stable output voltage with minimal noise and ripple.
Applications
The UA7810CKTTR is suitable for a variety of applications, including:
- On-Card Regulation: Eliminates noise and distribution problems associated with single-point regulation.
- Power Supplies: Used in linear power supplies to provide stable and regulated output voltage.
- Precision Regulators: Can be used as the power-pass element in precision voltage regulators.
- Adjustable Output Voltages and Currents: Can be used with external components to obtain adjustable output voltages and currents.
Q & A
- What is the maximum output current of the UA7810CKTTR?
The UA7810CKTTR can deliver up to 1.5 A of output current.
- What are the available fixed output voltages in the µA78xx series?
The µA78xx series includes fixed output voltages of 5 V, 8 V, 10 V, 12 V, 15 V, and 24 V.
- Does the UA7810CKTTR have thermal protection?
- How does the UA7810CKTTR handle short circuits?
In the event of a short circuit, the device limits its own current to safe levels by lowering the bias voltage of internal pass transistors.
- What is the dropout voltage of the UA7810CKTTR?
The dropout voltage is 2 V at an output current of 1 A and 25°C.
- What is the typical bias current of the UA7810CKTTR?
The typical bias current is 4.3 mA at 25°C.
- What is the ripple rejection of the UA7810CKTTR?
The ripple rejection is 55 dB to 71 dB for frequencies around 120 Hz.
- Can the UA7810CKTTR be used for adjustable output voltages?
- What are the recommended capacitors for input and output in typical applications?
A 0.33-μF capacitor across the input and a 0.1-μF capacitor across the output are recommended for filtering noise and stabilizing the output.
- What is the peak output current of the UA7810CKTTR?
The peak output current is 2.2 A at 25°C.
