MAX8505EEE+

MAX8505EEE+ Application Field and Working Principle

MAX8505EEE+ is a highly integrated regulator for DC/DC switching regulators. It integrates an adjustable high-side MOSFET and a low-side MOSFET into a single package, making it a complete high performance solution for portable DC/DC switching applications. Whether used as a stand-alone solution or integrated into a larger system, the MAX8505EEE+ is an ideal choice for portable DC/DC switching applications.

Features

The main features of the MAX8505EEE+ are:

• High-Side and Low-Side MOSFETs Highly Integrated into a Single Package
• Flexible Operating Voltage Range: Up to 22V
• Internal Charge Pump for Output Voltage Tracking
• Internal Bootstrap Diode to Reduce Component Count
• Internal Soft Start for Input Overshoot Protection
• Shutdown and Sleep Mode for Power Savings
• Wide Temperature Range: -40°C to +85°C

Application Field

The MAX8505EEE+ can be used in a variety of DC/DC switching regulator applications, including portable battery-powered systems, portable USB charger and adapter, automotive power systems, telecommunications, notebook computers, and other portable and non-portable applications.

Operation Principles

The MAX8505EEE+ includes a high-side and low-side MOSFET, which are connected in a standard buck converter topology. The converter consists of an inductor and a capacitor, which are connected in series as the “load”. When the MOSFETs are switched on, the inductor begins to store the energy of the input power source. When the high-side and low-side MOSFETs are switched off, the energy stored in the inductor begins to charge the output capacitor, and the output voltage begins to rise. This cycle is repeated at a predetermined frequency and is regulated by the control circuit integrated into the MAX8505EEE+.

In addition to controlling the switching of the MOSFETs, the MAX8505EEE+ also features adjustable output voltage and an internal soft start, which limits the current during startup and prevents the occurrence of input voltage overshoot and input voltage undershoot. The MAX8505EEE+ also features a shutdown mode, which can be used to reduce device power consumption when not in use.

Conclusion

The MAX8505EEE+ is a highly integrated regulator for DC/DC switching regulator applications, which includes a high-side and low-side MOSFET and is able to control the voltage through a standard buck converter topology. Additionally, it has adjustable output voltage, internal soft start, and shutdown mode for improved power savings. With its wide operating voltage range and wide temperature range (-40ªC to +85ªC), the MAX8505EEE+ is an ideal choice for DC/DC switching application in portable and non-portable applications.