Two-Channel, Isolated Micropower Management

Unit with Seven Digital Isolators

Data Sheet

ADP1032

Rev. 0

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FEATURES

Wide input supply voltage range: 4.5 V to 60 V

Integrated flyback power switch

Generates two isolated, well regulated independent outputs

Uses a 1:1 ratio transformer for simplified transformer design

Peak current limiting and OVP for flyback and buck regulators

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

channels

Three 100 kbps general-purpose isolated data channels

41-lead, 9 mm × 7 mm LFCSP form factor enables small

overall solution size

−40°C to +125°C operating junction temperature range

Safety and regulatory approvals (pending)

CISPR11 Class B radiated emission

UL recognition: 2500 V rms for 1 minute duration 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

APPLICATIONS

Industrial automation and process control

Instrumentation and data acquisition systems

Data and power isolation

GENERAL DESCRIPTION

The ADP1032 is a high performance, isolated micropower

management unit (PMU) that combines an isolated flyback and a

dc-to-dc regulator providing two isolated power rails. Additionally,

the ADP1032 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 ADP1032 generates isolated

output voltages of 6 V to 28 V (adjustable version) or 24 V

By default, the ADP1032 flyback regulator operates at a 250 kHz

switching frequency, and the buck regulator operates at 125 kHz.

TYPICAL APPLICATION CIRCUIT

3.3V, 5.0V, 5.15V

6V TO 28V

Tx1

PGND

SW2

FB1

VOUT1

ADP1032

VOUT2

SYNC

PGNDP

VINP

SLEW

SWP

L1

GNDP

SGND2

EN

D1

R3

R2

1.8V TO 5.5V

2.3V TO 5.5V

ISOLATED GPIO

CHANNELS AND SPI

INTERFACE

ISOLATED GPIO

CHANNELS AND SPI

INTERFACE

SGND2

SVDD2

C3

SGND1

SVDD1

PWRGD

MGND

MVDD

C4

C1

R1

4.5V TO 60V

Figure 1.

The two regulators are phase shifted relative to each other to

reduce electromagnetic interference (EMI). The ADP1032 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 ADP1032 use Analog

Devices, Inc., iCoupler® chip scale transformer technology,

optimized for low power and low radiated emissions.

The ADP1032 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.

Table 1. Family Models

Model

Flyback Switch

(mA)

Buck Switch

(mA)

Inverter Switch

(mA)

ADP1031

300

300

300

ADP1032

440

300

Not applicable

COMPANION PRODUCTS

Analog Output DAC: AD5758

Universal Analog input: AD4110-1

Software Defined Input/Output: AD74412R

Precision Data Acquisition Subsystem: AD7768-1

Additional companion products on the ADP1032 product page