LM1085IT-3.3 3A Low Dropout Positive Voltage Regulator TO-220-3 (LM1085IT-3.3V TO220-3)
The LM1085IT-3.3 is a high-performance low dropout (LDO) positive voltage regulator designed to provide a fixed 3.3V output with a current capability of up to 3A. It belongs to a family of regulators that utilize a floating architecture for improved load and line regulation. The device is specifically engineered to maintain a stable output even when the input-to-output voltage differential is low, featuring a maximum dropout of 1.5V at full load current.
This IC is primarily used in high-efficiency linear regulators, battery chargers, and microprocessor power supplies. It is a critical component for Arduino electronics projects in India that require a steady 3.3V rail for powering sensors, ESP8266/ESP32 modules, and other low-voltage digital logic from higher voltage sources like 5V or 12V adapters.
Key Features
- Fixed 3.3V output voltage
- 3A maximum output current capability
- Low dropout voltage (typically 1.3V at 3A)
- Internal current limiting and thermal overload protection
- Excellent line and load regulation (0.015 percent typical)
- Fast transient response for digital logic stability
- Standard TO-220 package for easy heat sinking
- Pin compatible with standard 1117 and 1084 series regulators
Specifications
- IC Type = Fixed Low Dropout (LDO) Regulator
- Output Voltage = 3.3V
- Max Output Current = 3A
- Max Input Voltage = 18V
- Dropout Voltage = 1.5V (at 3A)
- Package Type = TO-220-3
- Number of Pins = 3
- Mounting Type = Through-Hole
- Operating Temperature = -40 to 125 degrees Celsius
Interfaces
- PIN 1 (ADJ/GND) = Ground Connection
- PIN 2 (OUTPUT) = Fixed 3.3V Output (connected to Tab)
- PIN 3 (INPUT) = Unregulated DC Input Voltage
- TAB = Connected to Output Pin (provides heat dissipation)
