The LT3045EDD#TRPBF from Analog Devices is a high-performance ultralow noise, ultrahigh PSRR low dropout linear regulator (LDO) designed for noise-sensitive power supply applications requiring exceptional voltage stability and clean power delivery.
The device supports an input voltage range up to 20V and provides up to 500mA output current with a low dropout voltage of approximately 260mV. The adjustable output voltage range extends from 0V to 15V, allowing flexible power configuration for various precision analog and RF systems.
LT3045EDD#TRPBF features an advanced architecture combining a precision current reference with a high-performance voltage buffer, achieving extremely low output noise of approximately 0.8µVRMS (10Hz to 100kHz) and excellent power supply rejection performance up to 76dB at 1MHz. These characteristics make it ideal for powering sensitive analog circuits and high-resolution data converters.
The device integrates multiple protection and control functions, including programmable current limiting, thermal shutdown, reverse polarity protection, reverse current protection, undervoltage lockout (UVLO), enable control, and power good indication.
The LT3045EDD#TRPBF is supplied in a compact 10-pin DFN exposed-pad package (3mm × 3mm), making it suitable for space-constrained PCB designs. Typical applications include RF power supplies, PLL/VCO circuits, precision instrumentation, high-speed ADC/DAC power supplies, medical equipment, and post-regulation of switching converters.
Key Features
- Ultralow noise LDO regulator
- Ultrahigh PSRR performance
- Output current: 500mA
- Input voltage: up to 20V
- Adjustable output voltage: 0V to 15V
- Output noise: 0.8µVRMS
- PSRR: up to 76dB @ 1MHz
- Low dropout voltage: approximately 260mV
- Programmable current limit
- Enable and power good functions
- Thermal shutdown protection
- Reverse polarity protection
- Reverse current protection
- Undervoltage lockout
- Package: 10-pin DFN (3mm × 3mm)
- Operating temperature: -40°C to +125°C
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