Three-Channel, Isolated Micropower
Management Unit with Seven Digital Isolators
Wide input supply voltage range: 4.5 V to 60 V
Integrated flyback power switch
Generates isolated, independent bipolar outputs and
factory programmable buck output
VOUT1: 21 V, 24 V or 6 V to 28 V
VOUT2: 5.15 V, 5.0 V, or 3.3 V
VOUT3: −24 V to −5 V
Uses a 1:1 ratio transformer for simplified transformer design
Peak current limiting and OVP for flyback, buck, and
Precision enable input and power-good output
Adjustable switching frequency via SYNC input
Internal compensation and soft start control per regulator
High speed, low propagation delay, SPI signal isolation
Three, 100 kbps general-purpose isolated data channels
9 mm × 7 mm LFCSP form factor enables small overall
−40°C to +125°C operating junction temperature range
Conforms to CISPR11 Class B radiated emission limits
Safety and regulatory approvals (pending)
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice 5A
300 V rms basic insulation between slave, master, and
field power domains (IEC 61010-1, pending)
VDE certificate of conformity
DIN V VDE 0884-10 (VDE 0884-10):2006-12
VIORM = 565 VPEAK
Industrial automation and process control
Instrumentation and data acquisition systems
Data and power isolation
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.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
TYPICAL APPLICATION CIRCUIT
4.5V TO 60V
6V TO 28V
3.3V, 5V, 5.15V
–24V TO –5V
CHANNELS AND SPI
2.3V TO 5.5V
CHANNELS AND SPI
1.8V TO 5.5V
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
Analog Output DAC: AD5758
Precision Data Acquisition Subsystem: AD7768-1
Additional companion products on theADP1031 product page
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
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