Analog Devices ADP2441 | Demoboard CN0321 / EVAL-CN0321-SDPZ

Beschreibung

The ADP2441 is a constant frequency, current mode control, synchronous, step-down dc-to-dc regulator that is capable of driving loads up to 1 A with excellent line and load regulation characteristics. The ADP2441 operates with a wide input voltage range of 4.5 V to 36 V, which makes it ideal for regulating power from a wide variety of sources. In addition, the ADP2441 has very low minimum on time (50 ns) and is, therefore, suitable for applications requiring a very high step-down ratio. The output voltage can be adjusted from 0.6 V to 0.9 V × VIN. High efficiency is obtained with integrated low resistance Nchannel MOSFETs for both high-side and low-side devices. The switching frequency is adjustable from 300 kHz to 1 MHz with an external resistor. The ADP2441 also has an accurate power-good (PGOOD) open-drain output signal. At light load conditions, the regulator operates in pulse skip mode by skipping pulses and reducing switching losses to improve energy efficiency. In addition, at medium to heavy load conditions, the regulator operates in fixed frequency pulse-width modulation (PWM) mode to reduce electromagnetic interference (EMI).

Eigenschaften

• Wide input voltage range of 4.5 V to 36 V
• Low minimum on time of50 ns
• Maximum load current of 1 A
• High efficiency of up to 94%
• Adjustable output down to 0.6 V
• ±1% output voltage accuracy
• Adjustable switching frequency of 300 kHz to 1 MHz
• Pulse skip mode at light load for power saving
• Precision enable input pin
• Open-drain power good
• External soft start with tracking
• Overcurrent-limit protection
• Reference similar product ADP2442 with synchronization capability.
• See data sheet for additional features.

Typische Anwendungen

• Temperature controller, PLC, Field instruments
• Temperature measurement, Spectrometer, digital X-ray, ECG meashurement
• Radar Systems

Weiterführende Informationen

• Datenblatt