Product Description:
The Analog Devices LT3045MPDD#TRPBF is a high-performance 500mA low dropout linear regulator featuring an ultralow-noise and ultrahigh-PSRR architecture for noise-sensitive analog and RF applications. It supports a 1.8V to 20V input range and a programmable 0V to 15V output range, making it suitable for RF power supplies, precision instrumentation, high-speed data converters, and post-regulation of switching supplies.
The LT3045 delivers just 0.8µVRMS output noise from 10Hz to 100kHz, with typical spot noise of 2nV/√Hz at 10kHz. Power-supply rejection reaches 76dB at 1MHz, helping suppress high-frequency supply ripple and switching noise in precision signal-chain applications.
The regulator supplies up to 500mA with a typical dropout voltage of only 260mV. Typical operating quiescent current is 2.2mA, falling to well below 1µA in shutdown. A single resistor programs the output voltage, while programmable current limiting, power-good monitoring, precision enable/UVLO, and fast-start capability simplify power-system design.
Multiple LT3045 devices can be paralleled to reduce noise, increase output current, and distribute heat across the PCB. The device is stable with a minimum 10µF ceramic output capacitor and includes reverse-battery protection, reverse-current protection, foldback current limiting, and thermal protection with hysteresis.
The LT3045MPDD#TRPBF is supplied in a 10-lead 3mm × 3mm DFN package with exposed pad. The MP-grade version is specified for -55°C to +150°C operation and appears in ADI’s Enhanced Product portfolio. The #TRPBF suffix denotes lead-free tape-and-reel packaging.
Key Features:
- Manufacturer: Analog Devices / ADI
- Part Number: LT3045MPDD#TRPBF
- Device Type: Low Dropout Linear Regulator
- Maximum Output Current: 500mA
- Input Voltage Range: 1.8V to 20V
- Output Voltage Range: 0V to 15V
- Typical Dropout Voltage: 260mV
- RMS Output Noise: 0.8µVRMS, 10Hz to 100kHz
- Spot Noise: 2nV/√Hz at 10kHz
- PSRR: 76dB at 1MHz
- Bandwidth: 1MHz
- Typical Quiescent Current: 2.2mA
- SET Pin Current: 100µA
- SET Initial Accuracy: ±1%
- Programmable Output Voltage: Yes
- Programmable Current Limit: Yes
- Power Good: Yes
- Fast Start-Up: Yes
- Precision Enable / UVLO: Yes
- Parallel Operation: Supported
- Minimum Output Capacitor: 10µF Ceramic
- Protection: Reverse Battery, Reverse Current, Current Limit, Thermal Limit
- Temperature Range: -55°C to +150°C
- Package: 10-Lead DFN with Exposed Pad
- Package Size: 3mm × 3mm
- Mounting Type: Surface Mount
- Packaging: Tape & Reel, Pb-Free.
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