Analog Devices Expands Versatile DC-DC Switching Controller Family Featuring Current-mode & Voltage-mode Configuration Option...
13 September 2012 - 2:00PM
Business Wire
Analog Devices, Inc. (ADI), a global leader in high-performance
semiconductors for signal-processing applications, today 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.
- Order samples and download data sheet:
http://www.analog.com/ADP1851
- 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
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.
More About the ADP1851/53 Versatile DC-to-DC Switching
Controller Family
In current-mode control, the ADP1851/53 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 ADP1851/53 can be configured for
voltage-mode control for improved noise performance, using input
line feed-forward for excellent line rejection. The ADP1851/53
series has a selectable pulse-skip mode to increase efficiency
during light load operation. The device also has an accurate
current limit, which allows for the sizing selection of external
components to optimize valuable PCB space. The ADP1851 and ADP1853
are supported by ADI’s online ADIsimPowerTM tools, making the
device easy to use and reducing design time.
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
Product
FullProduction
TemperatureRange
Price EachPer 1,000
Packaging
ADP1851ACPZ-R7
Now –40°C to +125°C $1.05 16-lead LFCSP
ADP1851-EVALZ
Now -- $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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