PWM, Step-Down DC-to-DC Controller with Margining and Tracking
The ADP1822 regulated output can track another power supply and can be dynamically adjusted up or down with the controller’s margining-control inputs, making it ideal for high reliability applications. It is well suited for a wide range of high power applications, such as DSP power and processor core power in telecommunications, medical imaging, high performance servers, and industrial applications. It operates from a 3.7 V to 5.5 V supply with power input voltage ranging from 1.0 V to 24 V.
The ADP1822 can operate at any frequency between 300 kHz and 1.2 MHz, either by synchronizing with an external source or an internally generated, logic-controlled clock of 300 kHz or 600 kHz. It includes an adjustable soft start to allow sequencing and quick power-up while preventing input inrush current. Output reverse-current protection at startup prevents excessive output voltage excursions. The adjustable, virtually lossless current-limit scheme reduces external part count and improves efficiency.
The ADP1822 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead QSOP package.
- Telecommunications and networking systems
- High performance servers
- Medical imaging systems
- DSP core power supplies
- Microprocessor core power supplies
- Mobile communication base stations
- Distributed power
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
This describes the design, operation, and test of the ADP1822 standard evaluation board. In all tests, the board is operated from an input voltage range of 9 V to 15 V, and generates up to 10 A at VOUT = 1.8 V. The switching frequency is fixed at 300 kHz.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.