Synchronous DC/DC Controller offers tracking and sequencing features.

Press Release Summary:

Configurable for dual-output (up to 2 x 25 A) or 2-phase single interleaved-output, (50 A max) systems, ADP1850 switching controller has 2.75-20 V input range and provides tracking capability between supplies. Independent Enable and Power Good functions allow daisy-chain sequencing between channels or another device. Able to be synchronized to external clock, IC operates in current mode, uses valley-current sensing, and incorporates start-up linear regulator as well as boot-strap diode.

Original Press Release:

Analog Devices Adds Dual Output Synchronous Controller to Power Management Portfolio

ADI's new ADP1850 synchronous controller provides greater flexibility, integrates tracking and sequencing features, and can be configured as a dual-output or high-current interleaved DC-to-DC controller for input voltages ranging from 2.75 V to 20 V.

NORWOOD, Mass.--Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, announced today the availability of the ADP1850 synchronous DC-to-DC switching controller that is easily configurable as dual output or interleaved two-phase controller for a wide range of high-current, high-efficiency applications. The ADP1850 offers more flexibility than other DC-to-DC controllers by providing a wider input voltage range of 2.75 V to 20 V, as well as easy configuration for dual-output (up to 2 x 25 A) or single interleaved-output (up to 50 A) systems. The ADP1850 provides accurate tracking capability between supplies and includes independent, precision ENABLE and accurate POWER_GOOD functions that allow simple, precise, and accurate daisy-chain sequencing between channels or another device - an important feature for powering multi-input voltage FPGA, DSP and ASIC devices. To view the data sheet or order samples, visit the ADP1850 product page.

"The ADP1850 offers more versatility, performance, and integration than other DC-to-DC switching controllers available and provides a simpler approach for reliable system power-up sequencing," said Laurence McGarry, marketing manager, Power Management Products Group, Analog Devices. "Designers can easily leverage the ADP1850's performance and flexibility over a number of different platforms, applications and designs without re-qualifying new devices."

The ADP1850 controller's high-level of integration includes a start-up linear regulator and a boot-strap diode for the high-side drive, which is ideal for high-density designs.

The new DC-to-DC switching controller can be synchronized to an external clock to eliminate system beat frequencies between converters that can sometimes result in audible noise. The ADP1850 operates in current mode for improved transient response and uses valley-current sensing for enhanced noise immunity. The ADP1850's advanced architecture enables accurate current sharing between interleaved phases for high-current outputs up to 50 A. For low-load operation, the ADP1850 can be configured to operate in power-saving mode by skipping pulses and reducing switching losses to improve the energy efficiency at light load. Additional flexibility is provided by externally programmable loop compensation, soft start and frequency, current limit and current-sense gain settings.

Key Features and Benefits
  • Dual output (up to 2 x 25 A) and single interleaved output (up to 50 A) enables increased re-use and greater design flexibility.
  • A wider input voltage range is ideal for 3.3 V to 12 V input systems.
  • Accurate current share between phases allows the ADP1850 to operate in interleaved mode and provide current and thermal balance between phases.
  • Integrated tracking and sequencing capability ensures reliable power-up with fewer components.
  • Power-saving mode improves efficiency at light loads and standby mode.
  • Synchronisation input eliminates system beat frequencies with 180 degrees phase shifted minimizes input ripple current.
  • A high level of integration including start-up linear regulator and the boot-strap diode for the high-side drive in a small 32 LFCSP 5 mm x 5 mm package enables higher density designs.

    Availability and Pricing
    The ADP1850 DC-to-DC controller is supported by a single-phase, 14 A and a two-phase, 50 A evaluation board, as well as the ADISimPower(TM) evaluation tool ( ).

    Product Availability Input Temperature Price Packaging
    Voltage Range Junction Each Per
    Range 1000

    ADP1850 In volume 2.75 to 20V −40°C to $1.85 5mm x 5mm
    production now +125°C 32 LFCSP

    Single phase 14A In production - - $60.00 -
    ADP1850SP-EVALZ now each

    Two Phase 50A In production - - $60.00 -
    ADP1850DP-EVALZ now each

    ADI in Power Management
    Analog Devices brings world-class signal processing prowess to a portfolio of innovative power management ICs that complement high-performance signal processing functions in a wide range of portable and fixed-power applications in consumer electronics, medical equipment, industrial and instrumentation, and communications infrastructure. By supporting signal chain design requirements, such as dynamic range, transient performance, and reliability, ADI helps customers solve complex power challenges easily and quickly, differentiate their products and get to market faster. Learn more about ADI's power management solutions at

    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. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

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