Linear Technology Corporation announces the LT3063, a high voltage, low noise, low dropout voltage linear regulator with active output discharge. The IC delivers up to 200 mA of continuous output current with a 300 mV dropout voltage at full load. The LT3063 includes an internal NMOS pull-down that discharges the output voltage if either the SHDN pin is driven low or the input voltage is turned off. This rapid output discharge helps protect the load in applications requiring power conditioning on both start-up and shutdown, such as high-end imaging sensors.
The LT3063 features a wide 1.6 V to 45 V input voltage range and delivers adjustable output voltages from 0.6 V to 19 V. A single capacitor provides programmable ultralow noise operation, only 30 µV RMS across a 10 Hz to 100 kHz bandwidth and reference soft-start functionality, preventing output voltage overshoot at turn-on. The LT3063’s output voltage tolerance is highly accurate at ±2% over line, load and temperature. The device’s input and output voltage range, fast transient response, low quiescent current of 45 µA (operating) and <3 µA (in shutdown) make it an excellent choice for portable battery-powered systems that require optimum run time, and for usage in automotive, industrial and avionic power supply applications.
The LT3063 operates with a small, low cost, ceramic output capacitor, optimizing stability and transient response. The IC is stable with a minimum value 3.3 µF output capacitor. The device’s internal protection circuitry includes reverse-battery protection, reverse-current protection, current limit with foldback and thermal limiting.
Summary of Features: LT3063
- Output Current: 200 mA
- Low Dropout Voltage: 300 mV
- Active Output Voltage Discharge in Shutdown or Input Supply Removal
- Low Noise: 30 µVRMS (10 Hz to 100 kHz)
- Low Quiescent Current: 45 µA
- Wide Input Voltage Range: 1.6 V to 45 V
- Adjustable Output Voltage Range: 0.6 V to 1 9V
- Output Tolerance: ±2% Over Load, Line & Temperature
- Single Capacitor Soft-Starts Reference & Lowers Output Noise
- Stable with 3.3 µF Ceramic Capacitors
- Low Shutdown Current <3 µA
- Reverse Battery & Reverse Current Protection
- Thermal Limiting & Current Limiting with Foldback
- Thermally Enhanced 8-Lead 2 mm × 3 mm DFN & MSOP Packages
