Analog Devices expand versatible DC-DC Switching Controller Family featuring Current-mode and Voltage-mode Configuration Options for high-current Applications

Analog Devices, Inc. (ADI), introduced the ADP1851 wide-input-range, synchronous, step-down DC-to-DC controller with voltage tracking and synchronization capability. The ADP1851 expands ADI’s popular series of configurable controllers following the recently introduced ADP1853. The versatile ADP1851/53 can be configured to work as a voltage-mode controller with input feed-forward or as a current-mode controller, depending on the application and customer preference. The ADP1851/53 are designed for high efficiency, high current, fast, transient point-of-load applications in a broad range of communications networking, industrial, medical, and consumer applications.

The ADP1851/53 can be connected in parallel to achieve higher current delivery—up to 50 A depending on the external FETs. The ADP1851 features a synchronization input eliminating troublesome “beat” frequencies and reducing system input capacitance when multiple devices with phase-shifted synchronization are used. ADP1851 also has a tracking capability that enables controlled start-up. Simple, robust sequencing can be implemented using the precision enable and power good functions. The ADP1851 is available in a 16-lead LFCSP (4-mm x 4-mm) package while the ADP1853 with clock out is available in a 24-lead (4-mm x4-mm) LFCSP package. 

ADP1851/ADP1853 Key Features and Benefits:  

• Configurable as voltage-mode or current-mode controller depending on the application and customer preferences
• Wide range input from 2.75 V to 20 V allows operation from commonly used voltage rails: 3.3 V, 5 V and 12 V
• Power good and precision enable simple, robust sequencing and health detection
• Programmable, accurate current limit optimizes output inductor and solution size.
• Synchronization function eliminates potential “beat” frequencies and can be used to reduce input current ripple using phase-shift synchronization
• ADP1853 adds clock out master feature
• Reference accuracy ±1% over the temperature range from –40°C to +125°C and ±0.5% from –40°C to +85°C.
• Selectable pulse-skip mode for energy saving at light load
• Easy to Use ADIsimPowerTM tool reduces design time  

Availability and Pricing Components 

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