LT3042EDD Ultra-Low Noise LDO 0.8andmu;V RMS Noise 76dB PSRR @1MHz 1.8-20V Input 3mmandtimes;3mm DFN-8 -40anddeg;C to +125anddeg;C
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FEATURES
andnbsp;Ultralow RMS Noise: 0.8andmicro;VRMS (10Hz to 100kHz)
andnbsp;Ultralow Spot Noise: 2nV/andradic;Hz at 10kHz
andnbsp;Ultrahigh PSRR: 79dB at 1MHz
andnbsp;Output Current: 200mA
andnbsp;Wide Input Voltage Range: 1.8V to 20V
andnbsp;Single Capacitor Improves Noise and PSRR
andnbsp;100andmicro;A SET Pin Current: andplusmn;1% Initial Accuracy
andnbsp;Single Resistor Programs Output Voltage
andnbsp;High Bandwidth: 1MHz
andnbsp;Programmable Current Limit
andnbsp;Low Dropout Voltage: 350mV
andnbsp;Output Voltage Range: 0V to 15V
andnbsp;Programmable Power Good
andnbsp;Fast Start-Up Capability
andnbsp;Precision Enable/UVLO
andnbsp;Parallelable for Lower Noise and Higher Current
andnbsp;Internal Current Limit with Foldback
andnbsp;Minimum Output Capacitor: 4.7andmicro;F Ceramic
andnbsp;Reverse Battery and Reverse Current Protection
n 10-Lead MSOP and 3mm andtimes; 3mm DFN Packages
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APPLICATIONS
andnbsp;RF Power Supplies: PLLs, VCOs, Mixers, LNAs
andnbsp;Very Low Noise Instrumentation
andnbsp;High Speed/High Precision Data Converters
andnbsp;Medical Applications: Imaging, Diagnostics
andnbsp;Precision Power Supplies
andnbsp;Post-Regulator for Switching Supplies
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DESCRIPTION
The LTandreg;3042 is a high performance low dropout linear regulator featuring LTCandrsquo;s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive RF applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3042 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB.
The device supplies 200mA at a typical 350mV dropout voltage. Operating quiescent current is nominally 2mA and drops to andlt;andlt;1andmicro;A in shutdown. The LT3042andrsquo;s wide output voltage range (0V to 15V) while maintaining unity gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capa bility and programmable power good to indicate output voltage regulation.
The LT3042 is stable with a minimum 4.7andmicro;F ceramic output capacitor. Built-in protection includes reverse bat tery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3042 is available in thermally enhanced 10-Lead MSOP and 3mm andtimes; 3mm DFN packages.
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INFORMATION
| Category | | andnbsp; |
| Mfr | | |
| Series | | |
| Packaging | | |
| Part Status | | |
| Output Configuration | | |
| Output Type | | |
| Number of Regulators | | |
| Voltage - Input (Max) | | |
| Voltage - Output (Min/Fixed) | | |
| Voltage - Output (Max) | | |
| Voltage Dropout (Max) | | |
| Current - Output | | |
| PSRR | 117dB ~ 56dB (120Hz ~ 10MHz) | |
| Control Features | Current Limit, Enable, Power Good | |
| Protection Features | Over Temperature, Reverse Polarity | |
| Operating Temperature | -40anddeg;C ~ 125anddeg;C | |
| Mounting Type | | |
| Package / Case | | |
| Supplier Device Package | | |
| Base Product Number | |
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LT3042EDD Ultra-Low Noise LDO 0.8μV RMS Noise 76dB PSRR @1MHz 1.8-20V Input 3mm×3mm DFN-8 -40°C to +125°C Images
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