Analog Devices LT8619 | Demoboard DC2137A

Description

Demonstration circuit 2137A is a monolithic step-down DC/DC switching regulator featuring the LT®8619. The LT8619 is a high efficiency, high speed synchronous monolithic step-down switching regulator that con¬sumes only 6μA of quiescent current. The demo circuit is designed for 5V, 1.2A output from 6V to 48V input with the transient input voltage up to 60V. The wide input range makes it suitable for regulating power from a wide variety of sources, including automotive, industrial systems and telecom supplies. The power switch, compensation and other necessary circuits are inside of the LT8619 to mini¬mize external components and simplify design.

Features

• Wide Input Voltage Range: 3V to 60V
• Fast Minimum Switch-On Time: 30ns
• Ultralow Quiescent Current Burst Mode Operation:
  • 6μA IQ Regulating 12VIN to 3.3VOUT
  • 10mVP-P Output Ripple at No Load
• Synchronizable/Programmable Fixed Frequency Forced Continuous Mode Operation: 300kHz to 2.2MHz
• High Efficiency Synchronous Operation:
  • 92% Efficiency at 0.5A, 5VOUT from 12VIN
  • 90% Efficiency at 0.5A, 3.3VOUT from 12VIN
• Low Dropout: 360mV at 0.5A
• Low EMI
• Accurate 1V Enable Pin Threshold
• Internal Soft-Start and Compensation
• Power Good Flag
• Small Thermally Enhanced 16-Lead MSOP Package and 10-Lead (3mm × 3mm) DFN Packages

Typical applications

• Industrial Supplies
• 12V Automotive Systems / 12V and 24V Commercial Vehicles / 48V Electric and Hybrid Vehicles

More information

• Datasheet