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Analog Devices Inc. ADP1822ARQZ-R7
- Part No.:
- ADP1822ARQZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADP1822ARQZ-R7.pdf
- Description:
- IC REG CTRLR BUCK 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,069
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Product details
Overview
ADP1822ARQZ-R7 from Analog Devices is a synchronous voltage-mode PWM step-down DC-to-DC controller driving all-N-channel MOSFET power stages to regulate output voltages as low as 0.6 V with 1% reference accuracy, 300 kHz/600 kHz selectable switching frequency, and integrated margining/tracking functions for high-reliability DSP and microprocessor core power supplies.
For engineers reviewing the ADP1822ARQZ-R7 datasheet, ADP1822ARQZ-R7 pinout, ADP1822ARQZ-R7 application, or ADP1822ARQZ-R7 equivalent, key selection criteria include its lossless current-sense architecture, dual-voltage margining control (MUP/MDN), tracking comparator inputs (TRKP/TRKN), and QSOP-24 package compatibility with high-density server and telecom board layouts.
Technical Context
The ADP1822ARQZ-R7 implements fixed-frequency voltage-mode PWM control with internal 0.6 V reference and error amplifier open-loop gain of 70 dB, enabling stable regulation across −40°C to +125°C junction temperature. Its programmable soft start uses an external capacitor on SS pin to control ramp rate while preventing reverse inductor current during prebiased startup.
Switching frequency is set via FREQ pin (300 kHz or 600 kHz) or synchronized externally via SYNC pin (300–1200 kHz range). Current limiting uses a 50 µA source into CSL pin with cycle-by-cycle detection of low-side MOSFET on-state voltage-eliminating sense resistors and associated losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.6 V to 85% of input voltage - supports low-voltage DSP/microprocessor cores without external LDO post-regulation |
| Reference Voltage Accuracy | ±1% over −40°C to +125°C - ensures tight output regulation under thermal stress in servers and medical imaging systems |
| Switching Frequency | 300 kHz / 600 kHz (pin-selectable) or 300–1200 kHz (synchronized) - enables optimization of size vs. EMI in dense PCB layouts |
| Current Sense Method | Voltage-based, lossless sensing at CSL pin - avoids power loss and board space of discrete current-sense resistors |
| Power-Good Output | Open-drain PWGD with 750 mV OV / 550 mV UV thresholds - provides precise system-level power sequencing feedback |
| Shutdown Current | 10 µA - enables ultra-low-power standby in battery-backed or energy-sensitive applications |
| Operating Junction Temp | −40°C to +125°C - qualified for industrial and telecom base station environments without derating |
Pinout & Package
ADP1822ARQZ-R7 is housed in a 24-lead QSOP package (5.0 mm × 6.2 mm, 0.635 mm pitch), optimized for thermal performance on 4-layer PCBs (θJA = 82°C/W) and compatible with standard surface-mount assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | High-side gate driver boost supply | Connects to flying capacitor between SW and BST to generate gate voltage > VIN for N-channel high-side MOSFET enhancement |
| DH | High-side gate driver output | Drives gate of external high-side N-MOSFET; swings between SW and BST voltages |
| SW | Power switch node | Common connection point for high-side source and low-side drain; feeds output LC filter |
| SYNC | External clock synchronization input | Accepts 300–1200 kHz logic-level signal to align switching with system clock or reduce beat frequencies |
| FREQ | Internal frequency select input | Logic-low = 300 kHz, logic-high = 600 kHz - sets nominal operating frequency without external components |
| MAR / MSEL | Margining control interface | Combination selects high-margin (MUP→FB), low-margin (MDN→FB), or nominal regulation (no FB change) |
| TRKP / TRKN | Tracking comparator inputs | TRKP monitors output; TRKN receives reference rail - forces output to track external supply during startup |
| CSL | Lossless current sense input | 50 µA current source referenced to PGND - converts low-side MOSFET VDS into programmable current-limit threshold |
| SS | Soft start timing control | Capacitor from SS to GND sets ramp time; internal 100 kΩ pull-up charges SS to 0.8 V for controlled output rise |
| PWGD | Open-drain power-good indicator | Sinks current when FB < 550 mV or > 750 mV - signals fault or out-of-regulation condition to system supervisor |
Key Features
| Feature | Design Value |
|---|---|
| All-N-channel MOSFET drive | Enables use of lower RDS(on) high-side switches than P-channel alternatives, improving efficiency in high-current (>10 A) core rails |
| Output voltage margining | Hardware-controlled up/down adjustment via MUP/MDN pins - supports production test validation without firmware intervention |
| Output voltage tracking | Internal comparator (TRKP/TRKN) enforces monotonic startup alignment with companion rails - prevents back-feeding in multi-rail systems |
| Lossless current limit | Eliminates sense resistor and associated I²R loss - preserves >94% efficiency at 15 A load (5 V → 1.8 V, Figure 1) |
| Programmable soft start | Capacitor-timed ramp with reverse-current protection - avoids output collapse during prebiased turn-on in hot-swap applications |
Applications
| Telecom Core Power | Medical Imaging DSP Supply |
|---|---|
Use Scenario: Regulating 1.2 V core voltage for FPGA-based signal processors in 5G baseband units with strict sequencing requirements. IC Role / Device Role / Timing Role: Primary step-down controller managing dynamic load steps up to 10 A/µs while coordinating with PMIC sequencer via PWGD and tracking inputs. Use Value: Margining capability validates ±3% output tolerance during burn-in; tracking ensures synchronized ramp with I/O supply to prevent latch-up. |
Use Scenario: Generating stable 1.8 V rail for high-speed ADC/DAC interfaces in MRI gradient control modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Synchronous buck controller delivering low-noise, thermally robust power with 1% reference stability over −40°C to +85°C ambient. Use Value: −40°C to +125°C junction rating and 70 dB error amplifier gain maintain regulation accuracy without compensation drift in sealed enclosures. |
| Server CPU Core Supply | Industrial PLC Processor Rail |
Use Scenario: High-efficiency 0.85 V/25 A core supply for x86 server CPUs where layout space and thermal density constrain solution size. IC Role / Device Role / Timing Role: Voltage-mode PWM controller driving paralleled N-MOSFETs with dead-time optimized by internal DL/DH drivers (33 ns/42 ns). Use Value: QSOP-24 footprint allows compact placement near CPU socket; 600 kHz operation reduces inductor volume by 2× vs. 300 kHz designs. |
Use Scenario: Reliable 3.3 V processor rail in DIN-rail mounted PLCs subject to vibration, humidity, and extended temperature cycling. IC Role / Device Role / Timing Role: Industrial-grade DC-DC controller with thermal shutdown (145°C) and undervoltage lockout (2.7 V) ensuring fail-safe operation during brownouts. Use Value: 10 µA shutdown current extends backup battery life; PGND/DGND separation minimizes noise coupling in mixed-signal control circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS40210DRCT | Current-mode control; requires external current-sense resistor; no margining or tracking features | Lacks hardware-based voltage margining and tracking - unsuitable for high-availability telecom or medical systems requiring coordinated rail startup | Choose for cost-sensitive, single-rail industrial supplies where sequencing simplicity outweighs margining needs |
| ISL62883CRZ-T | Integrated MOSFET drivers with bootstrap diode; supports 1.5 MHz max frequency; no dedicated margining pins | Higher max frequency enables smaller magnetics but lacks MUP/MDN/TRKP/TRKN pins - limits use in systems requiring production test margining or multi-rail tracking | Prefer for space-constrained laptop GPU rails where 1.5 MHz operation reduces component count, but avoid where margining is mandatory |
Compared with TPS40210DRCT and ISL62883CRZ-T, ADP1822ARQZ-R7 uniquely integrates margining and tracking circuitry in a QSOP-24 package with lossless current sensing-making it the only option among the three qualified for telecom equipment compliance testing and medical imaging system certification workflows.
Availability
ADP1822ARQZ-R7 is available at Aetrix Electronics and suitable for telecommunications infrastructure, medical imaging systems, and high-performance server power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADP1822ARQZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The ADP1822 product line delivers cost-optimized, feature-rich DC-DC controllers for high-current core power applications in telecom, medical, and computing systems-emphasizing reliability, thermal robustness, and hardware-based system integration.
FAQ
What is the minimum output voltage supported by the ADP1822ARQZ-R7?
The ADP1822ARQZ-R7 supports a minimum regulated output voltage of 0.6 V, set by its internal precision 0.6 V reference with ±1% accuracy over −40°C to +125°C. This enables direct powering of modern low-voltage DSP and microprocessor cores without intermediate regulation stages. The ADP1822ARQZ-R7 achieves this using a resistive feedback divider from output to FB pin, where the divider ratio scales the output down to match the 0.6 V reference.
How does the ADP1822ARQZ-R7 implement lossless current limiting?
The ADP1822ARQZ-R7 implements lossless current limiting by sourcing a precise 50 µA current from the CSL pin into an external resistor connected to the SW node. The resulting voltage drop across that resistor sets the current-limit threshold, eliminating the need for a power-dissipating sense resistor. When the low-side MOSFET's on-state voltage exceeds this threshold, the ADP1822ARQZ-R7 holds the low-side driver active to reduce inductor current-enabling accurate, efficient overcurrent protection without added board area or thermal load.
Can the ADP1822ARQZ-R7 synchronize to an external clock, and what is its sync range?
Yes, the ADP1822ARQZ-R7 can synchronize its switching frequency to an external clock applied to the SYNC pin. Its synchronization range spans 300 kHz to 1.2 MHz, with maximum allowable SYNC frequency limited to twice the nominal internal frequency selected by the FREQ pin (i.e., ≤600 kHz for 300 kHz mode, ≤1.2 MHz for 600 kHz mode). This capability allows noise-sensitive systems to align switching edges with master clocks or avoid critical EMI bands-ensuring clean operation in dense telecom and medical PCB layouts.
What is the purpose of the TRKP and TRKN pins on the ADP1822ARQZ-R7?
The TRKP (tracking positive) and TRKN (tracking negative) pins on the ADP1822ARQZ-R7 form an internal comparator that forces the output voltage to track an external reference rail during startup. TRKP connects to the ADP1822ARQZ-R7's output, while TRKN receives the target tracking voltage. If TRKN voltage is below the regulated output, the high-side switch disables to clamp output at TRKN level-preventing overshoot and back-feeding in multi-rail systems such as server motherboards or medical imaging power trees.
Does the ADP1822ARQZ-R7 support programmable soft start, and how is it configured?
Yes, the ADP1822ARQZ-R7 supports fully programmable soft start via an external capacitor connected between the SS pin and ground. An internal 100 kΩ pull-up resistor charges this capacitor to 0.8 V, and the rising SS voltage linearly scales the FB reference until it exceeds 0.6 V-enabling controlled output ramp-up. During overload, SS discharges through a 2.5 kΩ internal path to reduce output voltage, providing constant-current foldback. This configuration eliminates external timing components while supporting prebiased startup with reverse-current protection.
ADP1822ARQZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 3.7V ~ 5.5V
- Frequency - Switching:
- 310kHz, 570kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Margining, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
ADP1822ARQZ-R7 FAQ
1.How can I place an order for ADP1822ARQZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1822ARQZ-R7 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 ADP1822ARQZ-R7 reliable?
The price and inventory of ADP1822ARQZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1822ARQZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP1822ARQZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1822ARQZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1822ARQZ-R7?
ADP1822ARQZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1822ARQZ-R7 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 ADP1822ARQZ-R7?
For technical support, including ADP1822ARQZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1822ARQZ-R7 requirements.
6.How does Aetrix verify that ADP1822ARQZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP1822ARQZ-R7 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 ADP1822ARQZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP1822ARQZ-R7?
All ADP1822ARQZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1822ARQZ-R7, 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 ADP1822ARQZ-R7 part is unused and in its original packaging.
Return procedure for ADP1822ARQZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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