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Analog Devices Inc. ADP1051ACPZ-RL
- Part No.:
- ADP1051ACPZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Supply Controllers, Monitors
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP1051ACPZ-RL.pdf
- Description:
- IC DGTL PWR MGMT 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,182
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Product details
Overview
ADP1051ACPZ-RL from Analog Devices is a digital voltage mode controller for isolated DC-DC power supplies, implementing high-speed input voltage feedforward, six PWM outputs with 625 ps resolution, and PMBus-compliant telemetry. It supports switching frequencies from 49 kHz to 625 kHz, adaptive dead time compensation, and pre-bias startup-enabling high-density intermediate bus converters in server and networking infrastructure.
For engineers reviewing the ADP1051ACPZ-RL datasheet, ADP1051ACPZ-RL pinout, ADP1051ACPZ-RL application, or ADP1051ACPZ-RL equivalent, key selection criteria include its 24-lead LFCSP package, 6-channel PWM timing control, synchronous rectification support, and integrated EEPROM for field-programmable configuration without external host intervention.
Technical Context
The ADP1051ACPZ-RL employs 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 a dedicated 12-bit CS2 current sense channel supporting both high-side and low-side configurations. Its PLL-based oscillator delivers 190–210 MHz internal clocking, enabling 625 ps PWM resolution across all six outputs (OUTA–OUTD, SR1, SR2).
It implements closed-loop digital input voltage feedforward via the VF pin (1.56 MHz ADC sampling, 10 µs feedforward period), real-time droop current sharing between parallel units, and conditional overvoltage protection triggered by OVP pin comparator (0.75–1.5 V range, ±1.6% threshold accuracy). Fault response includes reverse current detection on CS2 (±3 mV threshold programmability) and 82 µs OCP latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 49 kHz to 625 kHz - enables optimization for efficiency vs. size in isolated topologies like LLC or phase-shifted full-bridge. |
| PWM Resolution | 625 ps - allows precise duty cycle control for tight regulation under fast transients and multi-phase synchronization. |
| Voltage Sense Accuracy | ±5% FSR (0–100% input range) on VS+ / VS− - ensures stable output regulation despite resistor divider tolerance and layout parasitics. |
| Current Sense Resolution | 12-bit ADC on CS2+, CS2− - supports accurate bidirectional current measurement for parallel current sharing and reverse current protection. |
| Operating Temperature | −40°C to +125°C junction - validated for industrial and telecom power systems with high ambient thermal stress. |
| Supply Current | 33 mA typical (normal operation) - minimizes auxiliary supply loading in high-efficiency designs targeting <100 mW standby loss. |
| PMBus Compliance | Fully compliant with SMBus 2.0 and PMBus 1.2 - enables standardized telemetry (VOUT, IOUT, temperature), fault logging, and dynamic configuration in system management controllers. |
Pinout & Package
ADP1051ACPZ-RL is housed in a 24-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad soldered to AGND for optimal thermal performance (θJA = 36.26°C/W). Pin 1 is located at the top-left corner adjacent to the marking dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS+, VS− | Differential output voltage sense inputs | Enable high-accuracy feedback with trimming support; require ≤0.5% resistor dividers for ±0.5% output regulation. |
| CS2+, CS2− | Differential current sense inputs | Support programmable high/low-side sensing with factory-trimmed gain; critical for droop current share and reverse current protection. |
| OUTA–OUTD, SR1, SR2 | 6x PWM logic outputs | Each drives external gate drivers; OUTC/OUTD configurable as SYNO for master/slave synchronization. |
| VF | Feedforward / input UVLO sense | Provides real-time line-voltage feedforward (10 µs sampling) and primary-side undervoltage lockout with 1 V nominal bias. |
| OVP | Output overvoltage comparator input | Triggers VOUT_OV_FAULT flag within 85 ns; threshold set externally between 0.75 V and 1.5 V referenced to VS−. |
| SYNI/FLGI | Synchronization input / flag trigger | Accepts external clock (90–110% period match) or user-defined fault signals; 360 ns pulse width minimum. |
| SDA, SCL | PMBus interface pins | Support 10–400 kHz clock rates; include glitch immunity (50 ns) and timeout protection (25–35 ms SCL low). |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive dead time compensation | Adjusts SR1/SR2 turn-off delay dynamically across load to minimize body diode conduction loss in synchronous rectifiers. |
| Pre-bias startup | Enables controlled soft-start into pre-charged output rails without reverse current or overshoot-critical for hot-swap and OR-ing applications. |
| Direct parallel control | Eliminates need for external OR-ing FETs or diodes by coordinating multiple ADP1051ACPZ-RL units via PMBus and sync signals. |
| On-board EEPROM | Stores full configuration (compensator, protection thresholds, timing) with 10,000 write cycles at 85°C-enables field reprogramming without host MCU. |
| Conditional overvoltage protection | Detects failing units in parallel arrays by comparing individual OVP flags and initiating safe shutdown before bus collapse. |
Applications
| Intermediate Bus Converter | Redundant Server PSU |
|---|---|
Use Scenario: 48 V to 12 V conversion feeding multiple point-of-load regulators in rack-mounted servers. IC Role / Device Role / Timing Role: Primary digital controller managing transformer drive, synchronous rectification, and input feedforward for transient response. Use Value: 625 ps PWM resolution and adaptive dead time enable >95% peak efficiency at 300 kHz while maintaining <±0.5% output regulation under 50 A step loads. |
Use Scenario: N+1 redundant 1 kW power modules sharing load in telecom shelf systems with hot-swap capability. IC Role / Device Role / Timing Role: Parallel coordinator using PMBus current readback and SYNO synchronization to enforce <±2% current imbalance across units. Use Value: Droop current sharing and conditional OVP prevent single-point failure propagation, extending mean time between failures (MTBF) by >3× versus analog controllers. |
| Industrial Isolated DC-DC Module | Networking Line Card Power |
Use Scenario: Compact 36 mm × 36 mm isolated 24 V/20 A module for PLC backplanes operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Voltage mode controller with RTD-based thermal monitoring and deep light-load mode for <1 W no-load consumption. Use Value: Integrated 12-bit RTD ADC (±0.45% FSR) and 100 mW typical active power reduce BOM count by eliminating external thermistors and LDOs. |
Use Scenario: 12 V intermediate rail powering FPGA, SerDes, and PHY ICs on 1U switch line cards with strict EMI limits. IC Role / Device Role / Timing Role: Digital controller implementing frequency dithering, soft-start sequencing, and PMBus telemetry for system-level power management. Use Value: Programmable 49–625 kHz switching range allows EMI peak suppression via spread-spectrum modulation without hardware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolated power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC2897A | Analog voltage-mode controller with fixed 625 ps resolution but no PMBus, EEPROM, or digital compensator. | Lacks telemetry, remote reconfiguration, and adaptive dead time-requires external circuitry for current sharing. | Choose UCC2897A only when digital interface and field updates are unnecessary and cost sensitivity outweighs feature flexibility. |
| MAX15301 | Hot-swap controller + digital PMBus power manager-not a full-function isolated DC-DC controller; lacks PWM outputs and feedforward. | Designed for secondary-side monitoring and protection, not primary-side topology control or transformer drive. | Select MAX15301 only for post-regulator supervision; it cannot replace ADP1051ACPZ-RL's core function as a primary-side digital controller. |
Compared with UCC2897A and MAX15301, the ADP1051ACPZ-RL uniquely integrates full digital control, six programmable PWM outputs, on-chip EEPROM, and PMBus telemetry-making it the only option capable of autonomous, reprogrammable, parallel-ready isolated power conversion without external microcontroller dependency.
Availability
ADP1051ACPZ-RL is available at Aetrix Electronics and suitable for high-density isolated DC-DC power supplies, intermediate bus converters, and high-availability parallel power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP1051ACPZ-RL 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 precision instrumentation, industrial automation, and power management markets since 1965.
The ADP1051ACPZ-RL belongs to Analog Devices' digital power controller product line, designed specifically for high-efficiency, high-reliability isolated DC-DC conversion in data center, telecom, and industrial infrastructure where programmability, telemetry, and parallel operation are mandatory.
FAQ
What is the primary function of the ADP1051ACPZ-RL in an isolated power supply?
The ADP1051ACPZ-RL serves as a digital voltage mode controller that manages PWM generation, synchronous rectification, input voltage feedforward, and system-level protection for isolated DC-DC topologies such as phase-shifted full-bridge and LLC resonant converters. Its six PWM outputs directly drive external gate drivers, and its PMBus interface enables real-time telemetry and configuration-making ADP1051ACPZ-RL central to achieving high density, efficiency, and reliability in modern power systems.
Does the ADP1051ACPZ-RL support parallel operation of multiple power supplies?
Yes, the ADP1051ACPZ-RL supports robust parallel operation through dedicated features including programmable droop current sharing, synchronization inputs/outputs (SYNI/SYNO), reverse current protection on CS2, and conditional overvoltage detection. These capabilities allow multiple ADP1051ACPZ-RL-controlled supplies to share load within ±2% imbalance while safely isolating faulty units-eliminating the need for external OR-ing devices in N+1 redundant architectures.
How does the ADP1051ACPZ-RL implement input voltage feedforward?
The ADP1051ACPZ-RL implements closed-loop digital input voltage feedforward via the VF pin, which connects to a resistor divider on the primary-side input. The internal 11-bit feedforward ADC samples VF every 10 µs and dynamically adjusts PWM duty cycle in real time to suppress line-induced output transients. This results in faster response to input variations than traditional analog feedforward, improving noise immunity and transient performance-key for ADP1051ACPZ-RL deployment in unstable AC-DC front-end environments.
What package type and thermal characteristics does the ADP1051ACPZ-RL use?
The ADP1051ACPZ-RL uses a 24-lead, 4 mm × 4 mm LFCSP package with exposed thermal pad. Its thermal resistance is θJA = 36.26°C/W and θJC = 1.51°C/W when mounted per JEDEC standards. The exposed pad must be soldered to a solid AGND plane to achieve rated performance and sustain continuous operation up to +125°C junction temperature-verified in ADP1051ACPZ-RL reference designs for high-power density modules.
Can the ADP1051ACPZ-RL operate without external programming after initial configuration?
Yes, the ADP1051ACPZ-RL contains on-board EEPROM that stores all configuration registers-including compensator settings, protection thresholds, PWM timing, and PMBus addresses. Once programmed via the GUI or PMBus commands, ADP1051ACPZ-RL boots autonomously with full functionality and requires no external host processor or firmware. This self-contained operation is essential for space-constrained or safety-critical applications where host dependency introduces risk.
ADP1051ACPZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Digital Power Controller
- Voltage - Input:
- 0V ~ 1.6V
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 28.5 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP (4x4)
ADP1051ACPZ-RL FAQ
1.How can I place an order for ADP1051ACPZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1051ACPZ-RL 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 ADP1051ACPZ-RL reliable?
The price and inventory of ADP1051ACPZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1051ACPZ-RL is usually 5 days.
3.What payment methods are accepted for ADP1051ACPZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1051ACPZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1051ACPZ-RL?
ADP1051ACPZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1051ACPZ-RL 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 ADP1051ACPZ-RL?
For technical support, including ADP1051ACPZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1051ACPZ-RL requirements.
6.How does Aetrix verify that ADP1051ACPZ-RL is sourced from the original manufacturer or authorized distributors?
All ADP1051ACPZ-RL 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 ADP1051ACPZ-RL meets industry standards.
7.What is the process for return or replacement of ADP1051ACPZ-RL?
All ADP1051ACPZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADP1051ACPZ-RL, 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 ADP1051ACPZ-RL part is unused and in its original packaging.
Return procedure for ADP1051ACPZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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