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)