LTM8080 Datasheet

• 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: <1μV_RMS (10Hz to 100kHz)
• Ultralow Output Spot Noise: 2nV/√Hz at 10kHz
• Ultrahigh PSRR: 80dB at 100kHz
• Wide Input Voltage: 3.5V to 40V
• Wide Output Voltage: 0V to 8V
• Dual 500mA Continuous Current at T_A = 85°C
• Voltage Tracking Function to Minimize Power Loss
• 100μA SET Pin Current with ±1% Initial Accuracy
• Selectable Switching Frequency: 200kHz to 2.2MHz
• External Synchronization
• Programmable Power Good
• Parallelable for Lower Noise and Higher Current
• 9mm × 6.25mm × 3.32mm BGA

• RF Power Supplies: PLLs, VCOs, Mixers, LNAs
• Very Low Noise Instrumentation
• High Speed/High Precision Data Converters
• Medical Applications: Imaging, Diagnostics

The LTM8080 is a 40V_IN, dual 500mA or single 1A ultralow noise, ultrahigh PSRR μModule^® regulator. LTM8080 has cascaded architecture which contains a 40V_IN step-down Silent Switcher regulator with an integrated EMI noise shield followed by dual high-performance low dropout linear regulators. The dual LDOs feature ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise-sensitive applications. The LTM8080 is an integrated solution comprised of a switcher and LDOs, which offers both advantages while maintaining a small size and significantly reduced PCB layout sensitivity.

The package includes the controllers, power switches, inductors, and support components. In addition, the LTM8080 has a built-in voltage tracking function that automatically sets V_BUS to either 2.5V nominal or 1V higher than V_OUT1, whichever is greater, to achieve superior noise performance and minimize power dissipation.

The LTM8080 is packaged in a thermally enhanced, compact (9mm × 6.25mm × 3.32mm) over-molded Ball Grid Array (BGA) package suitable for automated assembly by standard surface mount equipment and is RoHS compliant.