ADP1031ACPZ-1 - Isolated PMU with 3 Regulators | Analog Devices
MPN: ADP1031ACPZ-1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.76 | $276.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.08 | $2,080.00 |
ADP1031ACPZ-1 Overview
An isolated PMU is a power management IC that combines multiple power conversion stages with galvanic isolation, enabling safe and noise-free power transfer across an isolation barrier. It integrates the isolation components (such as transformers) and control circuitry into a single package, simplifying design and reducing board space. The ADP1031 belongs to the family of isolated power management units, which are essential in industrial automation, medical equipment, and communication systems where safety and noise immunity are critical.
Key features of the ADP1031ACPZ-1 include a wide input voltage range, high efficiency, and integrated isolation. The flyback regulator provides a regulated output, while the inverting and buck regulators offer additional rails with different polarities and voltage levels. The device also features overvoltage protection (OVP) on the inverting regulator, which monitors the FB3 pin and stops switching if the voltage falls below VFB3 by 10%, ensuring safe operation. The integrated SPI isolation channels eliminate the need for external digital isolators, reducing component count and system cost.
Technically, the ADP1031 uses a proprietary architecture that combines a primary-side controller with secondary-side regulation, achieving high efficiency and accurate output regulation. The device supports a wide range of output voltages and currents, making it versatile for various applications. The package is designed for excellent thermal performance, with an exposed pad for heat dissipation.
Typical applications include isolated data acquisition systems, industrial process control, programmable logic controllers (PLCs), and isolated sensor interfaces. The device is particularly suited for applications requiring multiple isolated power rails and high-speed data isolation, such as motor drives and smart grid equipment.
When designing with the ADP1031ACPZ-1, it is important to carefully select the external transformer and components to meet the required isolation and efficiency specifications. Proper PCB layout is essential to minimize noise and ensure reliable operation. The device also requires careful thermal management due to its power dissipation.
Drop-in alternatives for ADP1031ACPZ-1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADP1031ACPZ-1 (same form factor and footprint).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADP1031ACPZ-1-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADP1031ACPZ-3
✅ Drop-In📋 Reference alternative (not in catalog)
ADP1031ACPZ-2
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.08 / Unit
View Datasheet →ADP1031ACPZ-4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADP1031ACPZ-5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADP1031ACPZ-1 Maximum Ratings & Electrical Characteristics
| Number of Regulators | 3 (flyback, inverting, buck) |
| SPI Isolation Channels | 4 |
| Package | 41-LFCSP (9x7 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| REACH Status | Compliant |
| AEC-Q100 Qualified | No |
| Lead-Free | Yes |
ADP1031ACPZ-1 Pin Configuration
| Pin 1 | VIN — Input voltage supply |
| Pin 2 | GND — Ground |
| Pin 3 | VOUT1 — Flyback regulator output |
| Pin 4 | VOUT2 — Inverting regulator output |
| Pin 5 | VOUT3 — Buck regulator output |
| Pin 6 | FB1 — Feedback for flyback regulator |
| Pin 7 | FB2 — Feedback for inverting regulator |
| Pin 8 | FB3 — Feedback for buck regulator |
| Pin 9 | EN1 — Enable for flyback regulator |
| Pin 10 | EN2 — Enable for inverting regulator |
| Pin 11 | EN3 — Enable for buck regulator |
| Pin 12 | SCLK — SPI clock input |
| Pin 13 | SDI — SPI data input |
| Pin 14 | SDO — SPI data output |
| Pin 15 | CS — SPI chip select |
Typical Applications
ADP1031ACPZ-1 is suitable for 6 applications: Isolated Data Acquisition, Industrial Process Control, Programmable Logic Controllers (PLCs), Isolated Sensor Interfaces, Motor Drives, Smart Grid Equipment.
Isolated Data Acquisition
The ADP1031ACPZ-1 provides isolated power and data transfer for data acquisition systems. Its integrated flyback, inverting, and buck regulators generate multiple isolated rails, while the four SPI isolation channels enable high-speed data communication across the isolation barrier. This eliminates the need for separate isolated power supplies and digital isolators, simplifying design and reducing board space. The device's high efficiency and low noise ensure accurate signal integrity in precision measurement applications.
Recommended
Industrial Process Control
In industrial process control, the ADP1031ACPZ-1 provides isolated power rails for sensors, actuators, and controllers. The multiple regulators can generate positive and negative supplies needed for analog circuits, while the isolation protects sensitive electronics from high-voltage transients. The integrated SPI isolation channels allow safe communication between the control unit and field devices. The device's wide input voltage range and robust protection features make it suitable for harsh industrial environments.
Recommended
Programmable Logic Controllers (PLCs)
PLCs require multiple isolated power rails for I/O modules and communication interfaces. The ADP1031ACPZ-1 integrates three regulators to provide these rails from a single input, reducing component count and board space. The four SPI isolation channels enable high-speed isolated communication between the PLC CPU and I/O modules. The device's high efficiency reduces heat dissipation, improving reliability in enclosed control cabinets.
Recommended
Isolated Sensor Interfaces
The ADP1031ACPZ-1 is ideal for isolated sensor interfaces, providing clean power to sensors and isolating the signal path. The inverting regulator can generate a negative supply for sensors that require bipolar operation, while the buck regulator provides a low-noise positive rail. The SPI isolation channels transmit sensor data across the isolation barrier without corruption. This integration simplifies the design of isolated sensor modules and improves measurement accuracy.
Recommended
Motor Drives
In motor drive applications, the ADP1031ACPZ-1 provides isolated power for gate drivers and control electronics. The flyback regulator can generate a high-side supply, while the buck regulator powers the low-side logic. The isolation protects the control circuitry from high-voltage transients on the motor lines. The integrated SPI isolation channels enable high-speed communication between the microcontroller and gate drivers, improving switching performance and reducing EMI.
Recommended
Smart Grid Equipment
The ADP1031ACPZ-1 is used in smart grid equipment such as smart meters and power quality monitors. It provides isolated power for measurement circuits and communication interfaces, ensuring safety and noise immunity. The multiple regulators can generate the required voltage levels for analog front-ends and digital logic. The SPI isolation channels enable secure data transfer between the metering IC and the communication module, meeting stringent regulatory requirements.
Recommended
Recommended Products Summary
Engineering reference data for ADP1031ACPZ-1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADP1031ACPZ-1-R7 | ADP1031ACPZ-3 | ADP1031ACPZ-2 |
|---|---|---|---|---|
| Package | 41-LFCSP (9x7) | 41-LFCSP (9x7) | 41-LFCSP (9x7) | 41-LFCSP (9x7) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Regulators | 3 | 3 | 3 | 3 |
| SPI Isolation Channels | 4 | 4 | 4 | 4 |
| Output Voltage Configuration | Variant -1 | Variant -1 | Variant -3 | Variant -2 |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant |
| Lead-Free | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | No | No | No | No |
Key Differentiators
- Integrated three regulators and SPI isolation in one package (vs Discrete solutions using separate regulators and isolators)
- High-speed SPI isolation channels (vs ADP1031ACPZ-1-R7 (same device))
- Multiple output configurations (variants -1 to -5) (vs ADP1031ACPZ-3)
Design Notes
For optimal performance, place the ADP1031ACPZ-1 close to the isolation barrier and keep the high-frequency switching loops compact. Use a solid ground plane under the device and minimize trace lengths for the SPI lines. The exposed pad should be soldered to a thermal pad on the PCB to enhance heat dissipation.
The ADP1031ACPZ-1 can dissipate significant power depending on the load and input voltage. Ensure adequate thermal management by providing a copper area on the PCB connected to the exposed pad. For high-power applications, consider adding thermal vias to transfer heat to other layers. Monitor the junction temperature to stay within the specified limits.
One common pitfall is improper transformer selection for the flyback regulator. The transformer must have the correct turns ratio and isolation rating to achieve the desired output voltage and isolation. Additionally, ensure that the feedback resistors are accurately set to the required output voltages. Incorrect feedback can lead to output voltage errors or instability.
Compliance Information
RoHS and REACH compliant per distributor listings. Not AEC-Q100 qualified.
