Analog Devices Inc. LTM8080 μModule Regulators
Analog Devices Inc. LTM8080 µModule® Regulators are 40VIN, dual 500mA or single 1A ultralow noise, ultrahigh PSRR µModule regulators. The LTM8080 provides a cascaded architecture incorporating a 40VIN step-down Silent Switcher regulator, an integrated EMI noise shield, and dual high-performance low-dropout linear regulators. The dual LDOs implement ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise-sensitive applications.
The ADI LTM8080 is an integrated solution formed of a switcher and LDOs, which presents both advantages while maintaining a small size and significantly reduced PCB layout sensitivity. The device incorporates controllers, power switches, inductors, and support components. Furthermore, the regulators include a built-in voltage tracking function that automatically sets VBUS to either 2.5V nominal or 1V higher than VOUT1, whichever is greater, to accomplish superior noise performance and minimize power dissipation.
The LTM8080 is housed in a thermally enhanced, compact (9mm x 6.25mm x 3.32mm) over-molded Ball Grid Array (BGA) package designed for automated assembly by standard surface mount equipment and is RoHS compliant.
Features
- Dual LDOs powered by an integrated switching step-down regulator
- Low noise Silent Switcher® architecture with an integrated EMI noise shield
- CISPR22 Class B and CISPR25 Class 5 compliant
- Ultralow output RMS noise of <1μVRMS (10Hz to 100kHz)
- Ultralow output spot noise of 2nV/√Hz at 10kHz
- Ultrahigh PSRR of 80dB at 100kHz
- Wide input voltage of 3.5V to 40V
- Wide output voltage of 0V to 8V
- Dual 500mA continuous current at TA = +85°C
- Voltage tracking function to minimize power loss
- 100μA SET pin current with ±1% initial accuracy
- Selectable switching frequency of 200kHz to 2.2MHz
- External synchronization
- Programmable power good
- Parallelable for lower noise and higher current
- 9mm x 6.25mm x 3.32mm BGA
Applications
- RF power supplies of PLLs, VCOs, mixers, and LNAs
- Low noise instrumentation
- High-speed/high-precision data converters
- Medical, including imaging and diagnostics
Videos
Typical Application
Noise Spectral Density
Associated Eval Board
Analog Devices Inc. DC3071A Evaluation Board
Designed to evaluate the LTM8080 μModule® regulator, a complete ultra-high PSRR solution.