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Analog Devices Inc. ADUM3070ARQZ-RL7
- Part No.:
- ADUM3070ARQZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADUM3070ARQZ-RL7.pdf
- Description:
- IC REG PSH-PULL ADJ 350MA 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
ADUM3070ARQZ-RL7 from Analog Devices is an isolated switching regulator IC with integrated iCoupler® feedback, designed as a primary-side transformer driver for up to 2.5 W isolated output power. It delivers regulated adjustable output (3.3 V to 24 V), supports 200 kHz–1 MHz oscillator frequency, achieves up to 80% efficiency, and provides 2500 V rms isolation - used in gate drive bias supplies and isolated sensor interfaces.
For engineers reviewing the ADUM3070ARQZ-RL7 datasheet, ADUM3070ARQZ-RL7 pinout, ADUM3070ARQZ-RL7 application, or ADUM3070ARQZ-RL7 equivalent, key selection considerations include its integrated PWM feedback architecture, QSOP-16 package, 565 V peak reinforced insulation rating (VDE 0884-17), pulse-by-pulse overcurrent protection, and soft-start functionality at power-up.
Technical Context
The ADUM3070ARQZ-RL7 implements a secondary-side-controlled isolated dc-dc architecture using iCoupler® chip-scale transformers for isolated PWM feedback transmission. Its internal push-pull driver (X1/X2 pins) drives external transformers, while the FB pin receives voltage-divider feedback from the isolated output to regulate via duty-cycle modulation.
It features undervoltage lockout (UVLO) with hysteresis on VDD1, thermal shutdown at 150°C with 20°C hysteresis, and operates across −40°C to +105°C ambient. The OC pin enables oscillator frequency programming (200 kHz–1 MHz) via external resistor, and the VREG/VDD2 interface supports dual-supply configurations (e.g., 5 V input → 15 V isolated output).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2500 V rms for 1 minute; VIORM = 565 V peak per VDE 0884-17 - enables reinforced insulation in industrial and medical safety-critical systems. |
| Output Voltage Range | 3.3 V to 24 V (adjustable via FB resistor divider) - supports single- or dual-output isolated supplies including 5 V, 12 V, 15 V, and 24 V rails. |
| Max Output Power | 2.5 W at 5 V input - sufficient for gate drivers, isolated ADC/DAC bias, and low-power sensor signal conditioning. |
| Switching Frequency | 200 kHz to 1 MHz (programmable via OC pin resistor) - allows optimization of transformer size, EMI, and efficiency trade-offs. |
| Efficiency | Up to 80% at full load - exceeds unregulated isolated converters and reduces thermal stress in compact enclosures. |
| Protection Features | Pulse-by-pulse overcurrent protection + thermal shutdown - prevents damage during short-circuit or overload transients without latch-off. |
| Package | 16-lead QSOP (5.3 mm × 10.2 mm) - surface-mount compatible with standard PCB assembly and provides 3.5 mm creepage/clearance. |
Pinout & Package
ADUM3070ARQZ-RL7 is housed in a 16-lead QSOP package with gull-wing leads, optimized for high-voltage isolation and thermal performance. Pin 1 is marked by a dot; GND1 (Pins 2, 8) and GND2 (Pins 9, 15) are separated to maintain isolation integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| X1 | Transformer Driver Output 1 | Drives one side of external push-pull transformer primary; complements X2 for complementary switching. |
| X2 | Transformer Driver Output 2 | Drives opposite side of transformer primary; forms full push-pull pair with X1 for efficient power transfer. |
| VDDA | Primary-Side Supply Input | Accepts 3.0 V–5.5 V input; powers internal logic and driver stages; requires 0.1 µF bypass capacitor to GND1. |
| VREG | Secondary Regulator Input | Accepts 5.5 V–15 V external supply to generate regulated 5.0 V on VDD2; enables higher-output configurations (e.g., 5 V → 15 V). |
| FB | Feedback Input | Monitors isolated output via resistor divider; sets VISO = 1.25 V × (R1 + R2)/R2; required even in open-loop mode for soft start. |
| OC | Oscillator Control | Resistor-to-GND2 sets switching frequency (200 kHz–1 MHz); logic-high disables regulation (open-loop mode). |
| GND1 / GND2 | Isolated Ground References | Separate ground domains for primary (Pins 2, 8) and secondary (Pins 9, 15); critical for maintaining 2500 V rms isolation barrier. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated iCoupler® PWM Feedback | Eliminates optocouplers and external compensation components - reduces BOM count and improves loop stability across temperature and load. |
| Soft Start Function | Prevents inrush current and output overshoot during power-up - essential for reliable startup in systems with downstream LDOs or microcontrollers. |
| High Common-Mode Transient Immunity | >25 kV/µs - maintains regulation integrity in noisy industrial environments with fast-switching IGBTs or SiC MOSFETs. |
| Reinforced Insulation Certification | UL 1577, VDE 0884-17, IEC 62368-1, IEC 61010-1 - meets safety requirements for medical, industrial, and process control equipment. |
| Thermal Shutdown with Hysteresis | Triggers at 150°C junction temperature with 20°C hysteresis - ensures safe recovery after overload without manual reset. |
Applications
| Industrial Motor Drives | Isolated Sensor Signal Chains |
|---|---|
|
Use Scenario: Providing gate-drive bias for isolated half-bridge IGBT/SiC modules in variable-frequency drives. IC Role / Device Role / Timing Role: Isolated switching regulator supplying clean, regulated 15 V to gate driver ICs, referenced to floating high-side switch node. Use Value: Enables direct integration of bias supply without external optocoupler-based feedback, reducing layout complexity and improving transient response under PWM switching noise. |
Use Scenario: Powering isolated analog front-ends (e.g., precision ADCs, RTD interfaces) in hazardous-area process transmitters. IC Role / Device Role / Timing Role: Generating 5 V or 3.3 V isolated rail from 24 V loop-powered bus, with <2% load regulation over 10–500 mA range. Use Value: Delivers stable, low-noise supply despite wide input variation and harsh EMI - critical for sub-16-bit measurement accuracy. |
| Medical Patient Monitoring | Programmable Logic Controller (PLC) I/O Modules |
|
Use Scenario: Supplying isolated power to EEG/ECG front-end amplifiers where patient-connected circuits require reinforced insulation. IC Role / Device Role / Timing Role: Regulated 3.3 V isolated output powering instrumentation amplifiers and SAR ADCs, meeting IEC 60601-1 creepage/clearance and leakage current limits. Use Value: Achieves 2500 V rms withstand and 565 V peak working voltage - satisfies reinforced insulation requirements without discrete isolation transformers. |
Use Scenario: Powering isolated digital I/O channels (e.g., 24 V inputs, relay drivers) in modular PLC backplanes. IC Role / Device Role / Timing Role: Delivering 5 V or 12 V isolated supply to opto-isolator LEDs or solid-state relays, with pulse-by-pulse OCP preventing field-wiring fault propagation. Use Value: Integrates protection, regulation, and isolation in one QSOP package - reduces footprint vs. discrete DC-DC + optocoupler solutions by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated dc-dc regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4070ARWZ | Higher isolation rating (5000 V rms), wider input range (3.0–5.5 V), same QSOP-16 package and FB/OC pin compatibility. | Required for applications needing enhanced creepage (≥8 mm) or double-reinforced insulation per IEC 61800-5-1. | Select ADUM4070ARWZ when system-level safety certification demands higher dielectric strength or extended lifetime under partial discharge stress. |
| TI ISOW7841DWER | Integrated transformer + isolated DC-DC + data isolator in SOIC-16; fixed 5 V output; no adjustable VISO or OC frequency control. | Suitable for space-constrained designs needing combined power + signal isolation, but lacks programmability and multi-output flexibility. | Choose ISOW7841DWER only when both isolated power and data (SPI/I2C) are needed simultaneously and output voltage is fixed at 5 V. |
Compared with ADUM3070ARQZ-RL7, ADUM4070ARWZ offers higher isolation margin for demanding safety standards, while ISOW7841DWER trades adjustability and efficiency for monolithic integration - making ADUM3070ARQZ-RL7 optimal for cost-sensitive, programmable isolated bias supplies requiring 3.3–24 V outputs.
Availability
ADUM3070ARQZ-RL7 is available at Aetrix Electronics and suitable for industrial motor drives, isolated sensor interfaces, medical monitoring equipment, and PLC I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for ADUM3070ARQZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADuM3070 product line delivers isolated power regulation with integrated feedback for compact, certified, and robust dc-dc conversion - targeting applications where safety, reliability, and board space are critical constraints.
FAQ
What is the maximum isolated output voltage supported by the ADUM3070ARQZ-RL7?
The ADUM3070ARQZ-RL7 supports an isolated output voltage range of 3.3 V to 24 V, set via external resistor divider on the FB pin using VISO = 1.25 V × (R1 + R2)/R2. For outputs above 15 V, the Figure 32 voltage-doubling schematic must be used with VREG supplied at ~12 V to avoid exceeding the 15 V absolute maximum rating on that pin.
Does the ADUM3070ARQZ-RL7 require an external transformer, and what are key design constraints?
Yes, ADUM3070ARQZ-RL7 requires an external push-pull transformer. Key constraints include: turns ratio NS/NP = 2 for 3.3 V/5 V outputs, NS/NP = 3 for 5 V → 15 V, ≤40% max duty cycle, and use of Schottky diodes with ≤0.5 V forward drop. Recommended transformers include Coilcraft JA4631-BL (1:2) and Halo TGSAD-290V6LF (1:3).
How does the ADUM3070ARQZ-RL7 achieve regulation without an optocoupler?
The ADUM3070ARQZ-RL7 uses Analog Devices' iCoupler® chip-scale transformer technology to transmit isolated PWM feedback from the secondary-side controller to the primary-side driver. This integrated digital channel replaces the optocoupler, providing precise, temperature-stable regulation with built-in loop compensation - eliminating drift and aging issues associated with optocouplers.
What safety certifications apply to the ADUM3070ARQZ-RL7?
The ADUM3070ARQZ-RL7 is certified to UL 1577 (2500 V rms, 1 min), VDE 0884-17 (reinforced, VIORM = 565 V peak), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1. These approvals validate its suitability for industrial, medical, and test equipment requiring reinforced insulation and pollution degree 2 compliance.
Can the ADUM3070ARQZ-RL7 operate with a 3.3 V input to generate a 5 V isolated output?
Yes, ADUM3070ARQZ-RL7 supports 3.3 V primary input to generate 5 V isolated output. Per Table 2 and Figure 9, it delivers up to 350 mA at 70% efficiency with a 1:3 Halo transformer (TGSAD-290V6LF) at 500 kHz. Minimum load of 10 mA is recommended to ensure stable regulation and low output noise.
ADUM3070ARQZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Push-Pull
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 350mA
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADUM3070ARQZ-RL7 FAQ
1.How can I place an order for ADUM3070ARQZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3070ARQZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADUM3070ARQZ-RL7 reliable?
The price and inventory of ADUM3070ARQZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3070ARQZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM3070ARQZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3070ARQZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3070ARQZ-RL7?
ADUM3070ARQZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3070ARQZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADUM3070ARQZ-RL7?
For technical support, including ADUM3070ARQZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3070ARQZ-RL7 requirements.
6.How does Aetrix verify that ADUM3070ARQZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM3070ARQZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADUM3070ARQZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM3070ARQZ-RL7?
All ADUM3070ARQZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3070ARQZ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADUM3070ARQZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM3070ARQZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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