Analog Devices LT3074
The LT3074 is a low voltage, ultralow noise, and ultrafast transient response linear regulator with a PMBus serial interface. The device supplies up to 3A with a typical dropout voltage of 45mV. The wide bandwidth and high PSRR permit the use of small ceramic capacitors, saving bulk capacitance and cost.| Part No. | LT3074 |
|---|---|
| Datasheet | LT3074 Download |
| Manufacturer |  Analog Devices |
| Description | 5.5V 3A Ultralow Noise High PSRR Dropout Linear Regulator |
| Buy | Stock & Price |
FEATURES
● Ultralow RMS Noise: 1.2µVRMS (10Hz to 100kHz)● Ultralow Spot Noise: 3.5nV/√Hz at 10kHz
● Ultralow 1/f Noise: 7µVP-P (0.1Hz to 10Hz)
● High PSRR at High Frequency: 52dB at 1MHz
● Ultrafast Transient Response
● Dropout Voltage: 45mV Typical
● 100µA Reference Current: ±0.5% Initial Accuracy
● Precision Current Monitor: ±3% Accuracy at 3A
● PMBus Capability Includes:
● VOUT, IOUT, VIN, VBIAS, and Temperature Reporting
● VOUT Margining
● IOUT Overcurrent and Undercurrent Warn Limits
● VOUT, VIN, and VBIAS Undervoltage and Overvoltage Warn Limits
● Overtemperature Warn Limit
● Stable with Ceramic Output Capacitors (10μF Minimum)
● Parallel Multiple Devices for Higher Current
● VIOC Pin to Control Upstream Switching Converter
● 22-Lead (3mm × 4mm) LQFN Package
APPLICATIONS
● RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs● High Speed/High Precision Data Converters
● Low Noise Instrumentation
● Post-Regulator for Switching Supplies
● FPGA and DSP Power Supplies
● Medical
APPLICATIONS
GENERAL DESCRIPTION
A 4.7µF reference bypass capacitor decreases output voltage noise to 1.2μVRMS.
