LT3046
LT3046
RECOMMENDED FOR NEW DESIGNS20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $3.32
Viewing:
Overview
- Ultra-Low RMS Noise: 0.8μVRMS (10Hz to 100kHz)
- Ultra-Low Noise: 2.2nV/√Hz at 10kHz
- Ultra-Low 1/f Noise: 2.5μVP-P (0.1Hz to 10Hz)
- Ultra-High PSRR: 82dB at 1MHz
- Output Current: 200mA
- Wide Input-Voltage Range: 2.2V to 20V
- Single Capacitor Improves Noise and PSRR
- SET Pin Current: 100μA, ±0.5% Initial Accuracy
- Single Resistor Programs Output Voltage
- Programmable Current Limit
- Low Dropout Voltage: 300mV
- Output-Voltage Range: 0.2V to 19V
- 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
- Compact, Low-Profile, 12-Lead, 3mm × 3mm, DFN Package and 11-Ball, 1.621mm × 1.680mm, WLCSP Package
The LT3046 is a high-performance, low-dropout linear regulator featuring Analog Devices, Inc. ultra-low noise and ultra-high PSRR architecture for powering noisesensitive applications. Designed as a precision current reference followed by a high-performance voltage buffer, the LT3046 can be easily paralleled to further reduce noise, increase output current, and spread heat on the PCB.
The device supplies 200mA at a typical 300mV dropout voltage. Operating quiescent current is nominally 3.7mA and drops to 26μA in shutdown. The LT3046’s wide output-voltage range (0.2V to 19V) 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 capability, and programmable power good to indicate output voltage regulation.
Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3046 is available in thermally enhanced, 12-lead, 3mm × 3mm, DFN and 11-Ball, 1.621mm × 1.680mm, WLCSP packages.
APPLICATIONS
- RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs
- Very Low-Noise Instrumentation
- High-Speed/High-Precision Data Converters
- Post-Regulator for Switching Supplies
Documentation
Data Sheet 1
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3046ANQ+ | WLCSP | ||
| LT3046ANQ+T | WLCSP | ||
| LT3046ATC+ | LFCSP | ||
| LT3046ATC+T | LFCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT3046
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
Evaluation Kit for the LT3046 20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator