Analog Devices Inc. ADP1052ACPZ-R7

Overview

ADP1052ACPZ-R7 from Analog Devices is a digital PWM controller IC for isolated DC-DC power supplies, implementing voltage-mode control with input voltage feedforward, six 625 ps-resolution PWM outputs (OUTA–OUTD, SR1, SR2), and PMBus™ interface compliance. It supports switching frequencies from 49 kHz to 625 kHz, adaptive dead time compensation, and operates across −40°C to +125°C in a 4 mm × 4 mm LFCSP package.

For engineers reviewing the ADP1052ACPZ-R7 datasheet, ADP1052ACPZ-R7 pinout, ADP1052ACPZ-R7 application, or ADP1052ACPZ-R7 equivalent, key selection criteria include its six-programmable PWM logic outputs, PMBus-compliant telemetry and configuration, adaptive dead time optimization, prebias startup capability, and support for parallel redundant power systems requiring accurate droop current sharing and reverse current protection.

Technical Context

The ADP1052ACPZ-R7 implements a flexible state machine architecture with dual ADC paths: a 12-bit VS+ / VS− voltage sense channel (0–1.6 V differential, ±5% FSR accuracy) and independent 12-bit CS1/CS2 current sense inputs supporting both high-side and low-side configurations. Its digital compensator enables closed-loop regulation with programmable gain, pole/zero placement, and volt-second balance control.

It integrates a 200 MHz PLL clock generator, 625 ps PWM timing resolution, and hardware-level fault response including conditional overvoltage protection, prebias startup sequencing, and 82 µs fast OVP/UVP comparator latency. Synchronization operates bidirectionally-master or slave-with ±10% period tolerance and <280 ns inter-cycle drift on SYNI/FLGI.

Key Specifications

Pinout & Package

ADP1052ACPZ-R7 is housed in a 24-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed thermal pad soldered to AGND for optimal thermal performance (θ_JA = 36.26°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolated power controller applications.

Compared with UCC28950RTWR and LM5145RHFT, the ADP1052ACPZ-R7 uniquely combines PMBus telemetry, six programmable PWM outputs, adaptive dead time, and built-in EEPROM - making it the only option among the three qualified for high-availability, software-defined, and thermally managed isolated power systems.

Availability

ADP1052ACPZ-R7 is available at Aetrix Electronics and suitable for server intermediate bus converters, industrial redundant power systems, telecom backup supplies, and high-density data center PSU modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP1052ACPZ-R7 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and power management.

The ADP1052ACPZ-R7 belongs to Analog Devices' digital power controller product line, designed specifically for high-efficiency, high-density isolated DC-DC conversion in infrastructure applications demanding telemetry, configurability, and parallel redundancy.

FAQ

What is the primary function of the ADP1052ACPZ-R7 in a power supply design?

The ADP1052ACPZ-R7 serves as a fully programmable digital PWM controller for isolated DC-DC power supplies. It executes voltage-mode control with input voltage feedforward, manages up to six PWM outputs for primary switching and synchronous rectification, and provides real-time telemetry via PMBus. Its architecture supports advanced features like adaptive dead time compensation, prebias startup, and parallel current sharing - all critical for high-efficiency, high-availability power systems.

Does the ADP1052ACPZ-R7 support synchronization with other controllers?

Yes, the ADP1052ACPZ-R7 supports bidirectional frequency synchronization via its SYNI/FLGI pin. It can operate as either master or slave, with synchronization tolerance of ±10% of internal clock period and inter-cycle drift under 280 ns. OUTC or OUTD pins can be configured as SYNO outputs to drive other devices, enabling precise phase alignment in multi-phase or parallel power supply configurations without external timing circuitry.

How does the ADP1052ACPZ-R7 implement reverse current protection?

The ADP1052ACPZ-R7 detects reverse current using its CS2+ and CS2− differential inputs, with a dedicated comparator that triggers the SR_RC_FAULT flag when differential voltage falls below user-configurable thresholds (e.g., −3 mV to −24 mV). Upon detection, it disables SR1 and SR2 outputs within 150 ns propagation delay, preventing energy backfeed in OR-ing or N+1 redundant systems - a hardware-level response independent of firmware execution.

Can the ADP1052ACPZ-R7 operate without external programming?

Yes, the ADP1052ACPZ-R7 ships with factory-default settings stored in on-board EEPROM and begins operation immediately upon power-up. All critical functions - including PWM generation, voltage regulation, fault protection, and telemetry - are active without host intervention. Programming via PMBus is optional and used only to customize compensation, protection thresholds, or operational modes for specific application requirements.

What thermal sensing capability does the ADP1052ACPZ-R7 provide?

The ADP1052ACPZ-R7 integrates an RTD temperature sense input (pin 23) with a programmable current source (9.1–47.3 µA) and 12-bit ADC. Using an external NTC thermistor (e.g., 100 kΩ, beta = 4250) and 16.5 kΩ reference resistor, it delivers linearized temperature readings with ±5°C accuracy from 25°C to 100°C and ±7°C from 100°C to 125°C - enabling thermal margining, fan control, and derating decisions directly within the controller.