Analog Devices’ DC-DC Switching Controller Features Current-mode and Voltage-mode Options for High-current Applications
11 Juni 2012 - 2:00PM
Business Wire
Analog Devices, Inc. (ADI), a global leader in high-performance
semiconductors for signal-processing applications, today introduced
the ADP1853 wide-input-range, synchronous, step-down DC-to-DC
controller with voltage tracking and advanced clock synchronization
capability. The versatile ADP1853 can be configured as a
voltage-mode controller with input feed-forward or as a
current-mode controller, depending on the application and customer
preference. The ADP1853 has clock-out and synchronization input to
ensure 180-degree phase-shifted synchronization, eliminating
troublesome “beat” frequencies and reducing system input
capacitance when multiple devices are used. The new controller’s
tracking capability enables controlled start-up. Simple, robust
sequencing can be implemented using the precision enable and
power-good functions. The ADP1853 can be connected in parallel to
achieve higher current delivery—up to 50 A depending on the
external FETs. The ADP1853 is designed for high-efficiency,
high-current, fast-transient, point-of-load applications in a broad
range of communications networking, industrial, medical, and
consumer applications.
Versatile DC-DC Switching Controller with
Current-mode and Voltage-mode (Photo: Business Wire)
- Order samples and download data sheet:
http://www.analog.com/ADP1853
- Connect with engineers and ADI product
experts on EngineerZone™, an online technical support community:
http://ez.analog.com/community/power
- Learn more about ADI’s power management
applications, design tools and case studies:
http://www.analog.com/en/power-management/products/index.html
More About the ADP1853 DC-to-DC Switching Controller
In current-mode control, the ADP1853 architecture detects the
current during the off period to improve noise immunity using the
on-resistance of the low-side FET—or a series sense resistor for
higher accuracy. Externally adjustable slope compensation is added
to optimize performance in current mode. With minor adjustments to
external resistor settings, the ADP1853 can be configured for
voltage-mode control, using input-line feed-forward for excellent
line rejection. The ADP1853 has a selectable pulse-skip mode to
increase efficiency during light load operation. The device also
has an accurate current limit, which allows optimal sizing
selection of external components to optimize valuable PCB space.
The ADP1853 is accompanied by ADI’s online ADIsimPowerTM tools for
ease of use and reduced design time.
ADP1853 Key Features and Benefits:
- Configurable as voltage-mode or
current-mode controller depending on the application and customer
preference
- Clock-out function allows the device to
operate as a system synchronization master to other ADP1853 devices
eliminating potential “beat” frequencies and reducing input current
ripple using phase-shift synchronization.
- Power-good and precision-enable
facilitate simple, robust sequencing and health detection
- 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
- Parallel connection to reach higher
load-current capability in dual-phase mode
- Easy to Use ADIsimPowerTM tool reduces
design time
Availability and Pricing
Product
FullProduction
TemperatureRange
Price EachPer 1,000
Packaging ADP1853ACPZ-R7 Now –40°C to
+125°C $1.20 20-lead LFCSP
ADP1853-EVALZ
June 2012 -- $60.00 --
About Analog Devices
Innovation, performance, and excellence are the cultural pillars
on which Analog Devices has built one of the longest standing,
highest growth companies within the technology sector. Acknowledged
industry-wide as the world leader in data conversion and signal
conditioning technology, Analog Devices serves over 60,000
customers, representing virtually all types of electronic
equipment. Analog Devices is headquartered in Norwood,
Massachusetts, with design and manufacturing facilities throughout
the world. Analog Devices is included in the S&P 500 Index.
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journal, visit: http://www.analog.com/library/analogDialogue/
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