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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT3093 датащи(PDF) 1 Page - Analog Devices |
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LT3093 датащи(HTML) 1 Page - Analog Devices |
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1 / 32 page  LT3093 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION –20V, 200mA, Ultralow Noise, Ultrahigh PSRR Negative Linear Regulator The LT®3093 is a high performance low dropout negative linear regulator featuring ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applica- tions. The device can be easily paralleled to further reduce noise, increase output current and spread heat on a PCB. The LT3093 supplies 200mA at a typical 190mV dropout voltage. Operating quiescent current is nominally 2.35mA and drops to 3µA in shutdown. The device’s wide output voltage range (0V to –19.5V) error amplifier operates in unity-gain and provides virtually constant output noise, PSRR, bandwidth, and load regulation independent of the programmed output voltage. Additional features are a bipolar enable pin, programmable current limit, fast start- up capability and programmable power good to indicate output voltage regulation. The regulator incorporates a tracking function to control an upstream supply to main- tain a constant voltage across the LT3093 to minimize power dissipation and optimize PSRR. The LT3093 is stable with a minimum 4.7µF ceramic out- put capacitor. Built-in protection includes internal current limit with foldback and thermal limit with hysteresis. The LT3093 is available in thermally enhanced 12-Lead MSOP and 3mm × 3mm DFN Packages. APPLICATIONS n Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz) n Ultralow Spot Noise: 2.2nV/√Hz at 10kHz n Ultrahigh PSRR: 73dB at 1MHz n Output Current: 200mA n Wide Input Voltage Range: –1.8V to –20V n Single Capacitor Improves Noise and PSRR n 100µA SET Pin Current: ±1% Initial Accuracy n Single Resistor Programs Output Voltage n Programmable Current Limit n Low Dropout Voltage: 190mV n Output Voltage Range: 0V to –19.5V n Programmable Power Good and Fast Start-Up n Bipolar Precision Enable/UVLO Pin n VIOC Pin Controls Upstream Regulator to Minimize Power Dissipation and Optimize PSRR n Minimum Output Capacitor: 4.7µF Ceramic n 12-Lead MSOP and 3mm × 3mm DFN Packages n RF and Precision Power Supplies n Very Low Noise Instrumentation n High Speed/High Precision Data Converters n Medical Applications: Diagnostics and Imaging n Post-Regulator for Switching Supplies All registered trademarks and trademarks are the property of their respective owners. Power Supply Ripple Rejection LT3093 SET GND 3093 TA01a – + 100µA ILIM PGFB OUTS OUT 4.7µF 3.3V 4.7µF 33.2k 200k PIN NOT USED IN THIS CIRCUIT: VIOC 9.76k VOUT –3.3V IOUT(MAX) –200mA IN PG VIN –5V EN/UV 4.7µF 50k 450k VIN = –5V RSET = 33.2k COUT = 4.7µF CSET = 4.7µF IL = –200mA FREQUENCY (Hz) 10 100 1k 10k 100k 1M 10M 0 15 30 45 60 75 90 105 120 3093 TA01b |
Аналогичный номер детали - LT3093 |
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Аналогичное описание - LT3093 |
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