LT1086CT-5 Precision Low Dropout (LDO) Regulator (LT1086CT-5 IC)
The LT1086CT-5 is a high-efficiency 1.5A low dropout positive regulator fixed at a 5V output. While you mentioned "DIP IC," it is important to note that this specific high-power regulator is almost exclusively found in the 3-pin TO-220 through-hole package to handle the thermal demands of its 1.5A output. It features a unique architecture that operates with as little as a 1V input-to-output differential, making it significantly more efficient than standard regulators like the 7805.
In the Indian industrial sector, the LT1086CT-5 is a primary choice for microprocessor power supplies, battery chargers, and post-regulators for switching supplies. Its internal circuitry is laser-trimmed to ensure 1% output voltage accuracy, and it includes built-in thermal limiting and current limit protection to prevent damage during overload conditions.
Key Features
- Low Dropout Voltage: Guaranteed maximum dropout of 1.5V at 1.5A, decreasing at lower load currents.
- High Efficiency: Operates down to a 1V differential, minimizing power loss and heat generation.
- Precision Performance: On-chip trimming ensures 1% output voltage accuracy and excellent line/load regulation.
- Thermal Protection: Includes a 100% thermal limit functional test to ensure reliability under heavy loads.
- High Ripple Rejection: Provides >75dB ripple rejection, essential for clean power in sensitive analog circuits.
- Pin Compatibility: Designed to be pin-compatible with older three-terminal adjustable regulators for easy upgrades.
- Wide Operating Range: Operates with input voltages up to 20V for the 5V fixed version.
Specifications
- IC Type: Low Dropout (LDO) Linear Regulator
- Output Voltage: 5V (Fixed)
- Output Current: 1.5A
- Dropout Voltage: 1.3V (Typical) / 1.5V (Max at 1.5A)
- Line Regulation: 0.015% (Typical)
- Load Regulation: 0.1% (Typical)
- Quiescent Current: 5 mA (Typical)
- Package Type: TO-220-3 (Through-Hole)
- Operating Temperature: 0°C to 125°C
Pinout Configuration (TO-220-3)
- Pin 1 (ADJ / GND): Ground for the fixed 5V version.
- Pin 2 (VOUT): Regulated 5V Output (Note: The TAB is also connected to VOUT).
- Pin 3 (VIN): Unregulated Input Voltage (Max 20V).
