Una sugerencia.
Aunque personalmente no la he probado, quizás en breve lo haga, podría recomendar para alimentar electrónica sensible al ruido, fuentes de audio, instrumentación etc. Y de bajo consumo, fuentes basadas en un integrado relativamente reciente como el LT3042. Tiene características realmente buenas, como el ruido por debajo del μV y un PSRR muy alto.
http://cds.linear.com/docs/en/datasheet/3042fa.pdfhttp://www.ebay.com/itm/LT3042-precision-low-noise-power-supply-module-/272374975344?hash=item3f6ad04b70:g:NGcAAOSwFe5X2BkNEsta sería doble y me inspira más confianza.
http://www.diyinhk.com/shop/audio-kits/88-08uv-ultralow-noise-dac-power-supply-regulator-91215v-15ax2.htmlLT3042 - 20V, 200mA, Ultralow Noise, Ultrahigh PSRR RF Linear Regulator
Features
Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz)
Ultralow Spot Noise: 2nV/√Hz at 10kHz
Ultrahigh PSRR: 79dB at 1MHz
Output Current: 200mA
Wide Input Voltage Range: 1.8V to 20V
Single Capacitor Improves Noise and PSRR
100μA SET Pin Current: ±1% Initial Accuracy
Single Resistor Programs Output Voltage
High Bandwidth: 1MHz
Programmable Current Limit
Low Dropout Voltage: 350mV
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: 4.7μF Ceramic
Reverse Battery and Reverse Current Protection
10-Lead MSOP and 3mm × 3mm DFN Packages
Typical Application
LT3042 Typical Application
LT3042 Typical Application
Description
The LT®3042 is a high performance low dropout linear regulator featuring LTC’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 <<1μA in shutdown. The LT3042’s wide output voltage range (0V to 15V) while maintaining unitygain 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 capability and programmable power good to indicate output voltage regulation.
The LT3042 is stable with a minimum 4.7μF ceramic output capacitor. Built-in protection includes reverse battery 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 × 3mm DFN packages.
Applications
RF Power Supplies: PLLs, VCOs, Mixers, LNAs
Very Low Noise Instrumentation
High Speed/High Precision Data Converters
Medical Applications: Imaging, Diagnostics
Precision Power Supplies
Post-Regulator for Switching Supplies
