The ADP1031 is a high performance, isolated micropower
management unit (PMU) that combines an isolated flyback
dc-to-dc regulator, an inverting dc-to-dc regulator, and a
buck dc-to-dc regulator, providing three isolated power rails.
Additionally, the ADP1031 contains four, high speed, serial
peripheral interface (SPI) isolation channels and three general-purpose isolators for channel to channel applications where low
power dissipation and small solution size is required.
Operating over an input voltage range of +4.5 V to +60 V, the
ADP1031 generates isolated output voltages of +6 V to +28 V
(adjustable version) or+ 21 V and +24 V (fixed versions) for
VOUT1, factory programmable voltages of +5.15 V, +5.0 V, or
+3.3 V for VOUT2, and an adjustable output voltages of −24 V to
−5 V for VOUT3.
By default, the ADP1031 flyback regulator operates at a 250 kHz
switching frequency and the buck and inverting regulators operate
at 125 kHz. All three regulators are phase shifted relative to each
other to reduce electromagnetic interference (EMI). The ADP1031
can be driven by an external oscillator in the range of 350 kHz
to 750 kHz to ease noise filtering in sensitive applications.
The digital isolators integrated in the ADP1031 use Analog
Devices, Inc., iCoupler® chip scale transformer technology,
optimized for low power and low radiated emissions.
The ADP1031 is available in a 9 mm × 7 mm, 41-lead LFCSP and
is rated for a −40°C to +125°C operating junction temperature
range.
Applications
- Industrial automation and process control
- Instrumentation and data acquisition systems
- Data and power isolation
