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Date: 6th Jan 2011

Dual output sync type DC/DC controller from ADI supports 50 Amps o/p current

Analog Devices (ADI) has made available ADP1850, the new synchronous DC-to-DC switching controller. ADI says this device 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.

Other notable advantages and features of ADP1850 as said by ADI include:

1. The ADP1850 include precision ENABLE and accurate POWER_GOOD functions supporting accurate daisy-chain sequencing between channels or another device, a feature required for powering multi-input voltage FPGA, DSP and ASIC devices.

2. The ADP1850 controller integrates start-up linear regulator and a boot-strap diode for the high-side drive, which is ideal for high-density designs.

3. 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.

4. 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.

5. 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.

6. Flexibility is provided by externally programmable loop compensation, soft start and frequency, current limit and current-sense gain settings.

7. Accurate current share between phases allows the ADP1850 to operate in interleaved mode and provide current and thermal balance between phases.

8. Integrated tracking and sequencing capability ensures reliable power-up with fewer components.

9. Synchronisation input eliminates system beat frequencies with 180 degrees phase shifted minimizes input ripple current.

Package: LFCSP 5 mm x 5 mm
Availability: Now
Price: Each $1.85 for 1K pieces

"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."

Editorial Product Rating: ** (Average Plus)

 
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