ADUM4473 Series

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

Catalog

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

Part	Mounting Type	Common Mode Transient Immunity (Min) [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Propagation Delay tpLH / tpHL (Max)	Isolated Power	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Package / Case [y]	Package / Case [y]	Rise / Fall Time (Typ) [custom]	Rise / Fall Time (Typ) [custom]	Channel Type	Inputs - Side 1/Side 2 [custom]	Inputs - Side 1/Side 2 [custom]	Pulse Width Distortion (Max) [Max]	Type	Data Rate	Number of Channels	Technology	Supplier Device Package
Analog Devices ADUM4473CRIZ	Surface Mount	25 kV/µs	3.6 V 5.5 V	3 V 4.5 V	60 ns		-40 °C	105 ░C	20-SOIC	0.295 in	7.5 mm	2.5 ns	2.5 ns	Unidirectional	3	1	6 ns	General Purpose	25 MBd	4	Magnetic Coupling	20-SOIC-IC

Catalog

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

ADuM4470/ADuM4471/ADuM4472/ ADuM4473 /ADuM4474is a four-channel digital isolator with integrated regulated DC-DC isolated power supply controller and integrated internal MOSFET driver. The DC/DC controller has a built-in isolated PWM feedback on the primary side, usingiCoupler®chip-level transformer technology and complete loop compensation. It is not necessary to use an optocoupler for feedback and to compensate the loop for stability.Compared to unregulated isolated DC/DC power supplies, ADuM447x isolators can provide a more stable output voltage and higher efficiency. It is packaged in a wide-body SOIC, fully integrated feedback and loop compensation, providing a smaller size and 8.3 mm creepage distance solution. Regulated feedback can provide a relatively flat efficiency curve over the entire output power range. AduM3070 can enable a DC/DC converter with an isolated output voltage range of 3.3 V to 24 V from an input voltage of 5.0 V or 3.3 V, with an output power of 2.5 WADuM447x isolators provide four independent isolation channels, supporting multiple channel configurations and data rates. (The ADuM447x mentioned in this data sheet represents ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474)APPLICATIONSPower startup bias and gate driveIsolation sensor interfaceProcess controlRS-232/RS-422/RS-485 transceiver