ADUM4471 Series

Isolated Switch Regulator with Quad-Channel Isolators (3/1 Channel Directionality)

Catalog

Isolated Switch Regulator with Quad-Channel Isolators (3/1 Channel Directionality)

Part	Data Rate	Package / Case	Package / Case [y]	Package / Case [y]	Number of Channels	Operating Temperature [Min]	Operating Temperature [Max]	Pulse Width Distortion (Max) [Max]	Propagation Delay tpLH / tpHL (Max) [custom]	Propagation Delay tpLH / tpHL (Max) [custom]	Supplier Device Package	Technology	Isolated Power	Channel Type	Rise / Fall Time (Typ) [custom]	Rise / Fall Time (Typ) [custom]	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Inputs - Side 1/Side 2 [custom]	Inputs - Side 1/Side 2 [custom]	Common Mode Transient Immunity (Min) [Min]	Type	Propagation Delay tpLH / tpHL (Max)
Analog Devices ADUM4471ARIZ-RL	1 Mbps	20-SOIC	0.295 in	7.5 mm	4	-40 °C	105 ░C	40 ns	100 ns	100 ns	20-SOIC-IC	Magnetic Coupling		Unidirectional	2.5 ns	2.5 ns	3.6 V 5.5 V	3 V 4.5 V	Surface Mount	3	1	25 kV/µs	General Purpose
Analog Devices ADUM4471CRIZ	25 MBd	20-SOIC	0.295 in	7.5 mm	4	-40 °C	105 ░C	6 ns			20-SOIC-IC	Magnetic Coupling		Unidirectional	2.5 ns	2.5 ns	3.6 V 5.5 V	3 V 4.5 V	Surface Mount	3	1	25 kV/µs	General Purpose	60 ns

Catalog

Isolated Switch Regulator with Quad-Channel Isolators (3/1 Channel Directionality)

Key Features

• Isolated PWM feedback with built-in compensation

• Primary side transformer driver for up to 2.5 W output power with 5 V input voltage

• Regulated adjustable output: 3.3 V to 24 V

• Up to 80% efficiency

• Quad DC-to-25 Mbps (NRZ) signal isolation channels

• 200 kHz to 1 MHz adjustable oscillator

• Soft start function at power-up

• Pulse-by-pulse overcurrent protection

• Thermal shutdown

• 5000 V rms isolation

• High common-mode transient immunity: >25 kV/μs

• 20-lead SOIC package with 8.3 mm creepage

• High temperature operation: 105°C

• Safety and regulatory approvalsUL recognition: 5000 V rms for 1 minute per UL 1577CSA certification per IEC 62368-1, IEC 61010-1, and IEC 60601-1VDE certificate of conformityVDE V 0884-10VIORM= 849 V peak

• UL recognition: 5000 V rms for 1 minute per UL 1577

• CSA certification per IEC 62368-1, IEC 61010-1, and IEC 60601-1

• VDE certificate of conformity

• VDE V 0884-10

• VIORM= 849 V peak

Description

TheADuM4470/ ADuM4471 /ADuM4472/ADuM4473/ADuM4474are quad-channel, digital isolations with a regulated DC/DC isolated power supply controller with an internal MOSFET driver. The DC/DC controller has an internal isolated PWM feedback from the secondary side based on theiCoupler®chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability.The ADuM447x isolator provides a more stable output voltage and higher efficiency compared to unregulated isolated dc-to-dc power supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution.The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM3070 enables a DC/DC converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage, with an output power of up to 2.5 W.The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. (The x in ADuM447x throughout this data sheet stands for the ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474).APPLICATIONSPower supply startup bias and gate drivesIsolated sensor interfacesProcess controlsRS-232/RS-422/RS-485 transceivers