LT3045：High Performance Regulator

The LT3045 is a high performance low dropout linear regulator with LTC's ultralow noise and ultrahigh PSRR architecture, designed to power noise sensitive applications. The LT3045, which is designed as a precision current reference followed by a high performance voltage buffer, may be readily paralleled to minimize noise, boost output current, and spread heat on the PCB. In addition to the LT3045 feature set, the LT3045-1 includes a VIOC tracking function that controls an upstream switching converter to maintain a constant voltage across the LT3045-1 and therefore reduce power consumption.

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Footprint

3D Model

Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz)

 Ultralow Spot Noise: 2nV/√Hz at 10kHz

 Ultrahigh PSRR: 76dB at 1MHz

 Output Current: 500mA

 Wide Input Voltage Range: 1.8V to 20V

 Single Capacitor Improves Noise and PSRR

 100µA SET Pin Current: ±1% Initial Accuracy

 VIOC Pin Controls Upstream Regulator to Minimize Power Dissipation

 Single Resistor Programs Output Voltage

 Programmable Current Limit

 Low Dropout Voltage: 260mV

 Output Voltage Range: 0V to 15V

 Programmable Power Good

 Fast Start-Up Capability

 Precision Enable/UVLO

 Parallelable for Lower Noise and Higher Current

 Internal Current Limit with Foldback

 Minimum Output Capacitor: 10µF Ceramic

 Reverse Battery and Reverse Current Protection

 12-Lead MSOP and 3mm × 3mm DFN Packages

RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs

 Very Low Noise Instrumentation

 High Speed/High Precision Data Converters

 Medical Applications: Imaging, Diagnostics

 Post-Regulator for Switching Supplies

LT3045 Typical Application Circuit

Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, µModule subsystems, and wireless sensor network products.