MAX17504ATP+

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The MAX17504ATP+ is a high-efficiency DC-DC step-down converter designed to operate over a wide input voltage range of 3V-28V. This device features a high power-switch current of 1.2A with current-mode control and uses synchronous rectification for high efficiency across the input voltage range. Its wide input voltage range and high efficiency enable the MAX17504ATP+ to provide excellent performance in harsh automotive and industrial applications, where conditions vary from 3V to 28V.

Overview

The MAX17504ATP+ is a high-performance step-down DC-DC converter. Using a high-side switch operating with synchronous rectification, the converter exhibits high efficiency across a wide input voltage range of 3V to 28V. Control and protection features include output overvoltage protection, undervoltage lockout, overcurrent protection, and over-temperature protection. Output voltage is adjustable and is set using external resistors.

Features

• Wide input voltage range: 3V to 28V
• High power-switch current of 1.2A
• Current-mode control
• High efficiency over input voltage range and wide output voltage range
• External resistor set for output voltage
• Fixed 1.2MHz switching frequency
• Seven output slew-rate setting options
• Selectable soft-start options
• Internal compensation for ease of use
• Full-featured protection: overvoltage protection, undervoltage lockout, overcurrent protection, over-temperature protection
• Small 28-pin thermally enhanced TSSOP package

Application Field

The MAX17504ATP+ can be used in a wide range of applications including automotive, computing, industrial automation, LED lighting, and telecom/networking, to provide high-efficiency power conversion and regulation. The device is designed to provide high power efficiency, tight regulation, wide output voltage range, and small board footprint required for these applications.

Working Principle

The MAX17504ATP+ is a highly integrated DC-DC step-down converter. The device works as a buck regulator, with a high-side switch operating in conjunction with synchronous rectification to provide high conversion efficiency over a wide input voltage range. The power switch is controlled by the internal current-mode control loop, which maintains an output voltage regulated to the external reference voltage and is set using external resistors. The feedback voltage is sensed and compared to the internal reference voltage to achieve tight regulation. The internal loop compensates for changes in input voltage, temperature, and output current. The device automatically shuts down when it detects an overvoltage or overcurrent condition, and operates in a low-power sleep mode when the load current is low.

The MAX17504ATP+ integrates several protection features, including overvoltage protection, undervoltage lockout, overcurrent protection, and over-temperature protection. When an error condition is detected, the device will shut down and restart after the error condition is corrected. The device also features an adjustable soft-start time to prevent current surges on change-over of output voltage. The full-featured protection and adjustable soft-start time make the MAX17504ATP+ ideal for automotive and industrial applications.

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