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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LT3077ACRZ-R7 Datenblatt(PDF) 1 Page - Analog Devices |
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LT3077ACRZ-R7 Datenblatt(HTML) 1 Page - Analog Devices |
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1 / 38 page  Data Sheet LT3077 5.5V, 3A, Ultra-Low Noise, High PSRR, 85mV Dropout Ultra-Fast Linear Regulator Rev. 0 DOCUMENT FEEDBACK TECHNICAL SUPPORT One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A. Tel: 781.329.47 00 ©2024 Analog Devices, Inc. Al l rights rese rve d. FEATURES Ultra-low RMS Noise: 1.2μVRMS (10Hz to 100kHz) Ultra-low Spot Noise: 3.5nV/√ at 10kHz Ultra-low1/fNoise:7µVP-P from0.1Hz to 10Hz High-Frequency PSRR: 50dB at 1MHz Ultra-fast Transient Response Dropout Voltage: 85mV Typical Digitally Programmable VOUT: 0.5V to 4.2V Output Tolerance : ±1.5% Over Line, Load, and Temperature Programmable Output Current Limit: ±10% at 3A Input Range: 0.6V to 5.5V Stable with Ceramic Output Capacitors (10μF Minimum) ParallelMultipleDevicesforHigherCurrent Precision Enable/Undervoltage Lockout (UVLO) Power Good (PG) Flag 18-Lead (3mm × 3mm) LFCSP-RT 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 The LT®3077 is a low voltage, ultra-low noise, and ultra-fast transient response linear regulator. The device supplies up to 3A with a typical dropout voltage of 85mV. A 4.7µF reference bypass capacitor decreases output voltage noise to 1.2µVRMS. The wide bandwidth and high PSRR permit the use of small ceramic capacitors, saving bulk capacitance and cost. The LT3077 is ideal for powering high-performance FPGAs, data converters, RF, and noise-sensitive signal chain applications. The output voltage is digitally selectable in 50mV increments from 0.5V to 1.2V, 100mV increments from 1.2V to 1.8V, and discrete levels at 2V, 2.5V, 3V, 3.3V, and 4.2V. The LT3077’s unity-gain operation provides virtually constant output noise, PSRR, and bandwidth independent of the programmed output voltage. Precision current limiting allows users to minimize input power supply size and cost. Built-in protection includes UVLO, internal current limit, and thermal shutdown with hysteresis. The LT3077 is available in a compact 18-lead (3mm x 3mm) LFCSP-RT package. SIMPLIFIED APPLICATION DIAGRAM Figure 1. Simplified Application Diagram Figure 2. Transient Response VOUT = 1V VIN = 1.3V VBIAS = 3.3V IOUT = 300mA TO 3A 3A/µs SLEW RATE COUT = 10µF 5µs/DIV VOUT AC-COUPLED 20mV/DIV IOUT 2A/DIV A N A L O G D E V I C E S C O N F I D E N T I A L |
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