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GENERAL DESCRIPTION

The ADP1034 is high performance, isolated micropower management

unit (PMU) that combines an isolated flyback dc-to-dc regulator,

an inverting buck boost dc-to-dc regulator, and a buck dc-todc

regulator, providing three isolated power rails. The ADP1034

includes 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

are required.

Operating over an input voltage range of 4.5 V to 60 V, the

ADP1034 generates isolated output voltage ranges of 6 V to 28 V

for VOUT1, ?24 V to ?2 V for VOUT3, and a factory-programmable

voltage of 5 V for VOUT2. Additionally, a PPC_IN pin is provided for

adjusting the VOUT1 setting on demand through a serial command

that allows higher efficiency in system level applications.

By default, the ADP1034 flyback regulator operates at a 250 kHz

switching frequency, and the buck and inverting regulators operate

at 125 kHz. The ADP1034 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 ADP1034 use Analog Devices,

Inc., iCoupler? chip scale transformer technology optimized for low

power and low radiated emissions. The ADP1034 is available in a

9 mm × 7 mm, 41-lead lead frame chip scale package (LFCSP)

and is rated for a ?40°C to +125°C operating junction temperature range.

FEATURES

? Wide input supply voltage range: 4.5 V to 60 V

? Integrated flyback power switch

? Generates isolated, independent, resistor-programmable bipolar

outputs and factory-programmable buck output

? VOUT1: 6 V to 28 V

? VOUT2: 5.0 V

? VOUT3: ?24 V to ?2 V

? 86 typical efficiency at 2.61 W output power

? Programmable power control pin (PPC_IN) for adjusting VOUT1

through serial command

? Uses a 1:1 ratio transformer for simplified transformer design

? Adjustable switching frequency via SYNC input

? Peak current limiting and overvoltage protection

? Internal compensation and soft start control per regulator

? Precision enable input

? 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 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 V peak

APPLICATIONS

? Industrial automation and process control

? Instrumentation and data acquisition systems

? Data and power isolation