MAX17225ENT+T

MAX17225ENT+T DC DC Switching Regulator

The MAX17225ENT+T is a DC DC switching regulator from MAXIM Integrated Products which offers integrated power management for multiple loads in a wide range of applications. The device is optimized for small form factor applications, enabling greater system power efficiency. The MAX17225ENT+T uses Pulse Width Modulation (PWM) technology to control the switch operation and output voltage levels, while also providing power-good and fault protection features.

Typical Applications

The MAX17225ENT+T DC DC switching regulator has a number of potential applications, where it can be used to provide high efficiency power management for multiple loads, such as:

• Battery-powered devices such as PDAs and mobile phones
• Embedded systems for medical, industrial, and consumer applications
• Network systems and routers
• System-level DC/DC power converters
• Notebook computers

Key Specifications

The MAX17225ENT+T DC DC switching regulator has the following key specifications:

• Input supply voltage range: 2.4V to 5.5V
• Output voltage range: 0.9V to 5.5V
• Switching frequency range: 100kHz to 500kHz
• Output current capability: 2A (continuous)
• Output power capability: 10W
• Low-dropout linear regulator mode: 0.25% accuracy
• Integrated power-good and fault protection features

Working Principle

The MAX17225ENT+T DC DC switching regulator operates on a fixed switching frequency (set by an external resistor from 600kHz to 1000kHz). The device contains an internal oscillator, which is used to generate a high-frequency PWM switching signal. The PWM signal is used to control the on-time of the power MOSFET switch and the current level of the output inductor. This provides a constant output voltage regardless of line and load conditions, reducing system noise and power consumption.

The MAX17225ENT+T also includes a current-limiting feature and an overload protection (OLP) circuit. The OLP circuit senses the load current and shuts down the device if the load current exceeds a predetermined level. If a short circuit occurs, the OLP circuit immediately switches off the output and lowers the current to safe operating levels. An integrated Under-Voltage Lockout (UVLO) feature also provides protection in the event of an input voltage drop.

Conclusion

The MAX17225ENT+T DC DC switching regulator from MAXIM Integrated Products is a low-cost, high-efficiency device which is ideally suited for powering multiple loads in small form factor application. The device uses Pulse Width Modulation (PWM) switching technology to ensure constant output voltage regardless of line and load conditions. It also provides integrated power-good and fault protection features to prevent damage and ensure system reliability.