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Analog Devices Inc. ADP2166ACPZ-R7
- Part No.:
- ADP2166ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2166ACPZ-R7.pdf
- Description:
- IC REG BUCK ADJ 6A 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:672
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Product details
Overview
ADP2166ACPZ-R7 from Analog Devices is a 6 A synchronous step-down DC-DC regulator with integrated 19 mΩ high-side and 15 mΩ low-side MOSFETs, 0.6 V ±1% reference voltage, input range 2.7 V–5.5 V, and programmable switching frequency up to 1.4 MHz. It delivers point-of-load power for FPGA core rails requiring precise voltage tracking and robust sequencing.
For engineers reviewing the ADP2166ACPZ-R7 datasheet, ADP2166ACPZ-R7 pinout, ADP2166ACPZ-R7 application, or ADP2166ACPZ-R7 equivalent, key selection considerations include its 6 A continuous output current, 24-lead 4 mm × 4 mm LFCSP package, precision enable threshold (1.2 V typ), power-good output with 16-cycle deglitching, and support for startup into precharged outputs.
Technical Context
The ADP2166ACPZ-R7 employs current-mode PWM control with fixed-frequency operation (620 kHz or 1.2 MHz default) or adjustable frequency (250 kHz–1.4 MHz via RT resistor). Its dual feedback inputs-FB for regulation and TRK for voltage tracking-enable coordinated sequencing with master supplies in multi-rail systems.
Protection architecture includes hiccup-mode overcurrent response triggered at 7.5 A peak limit (typ), thermal shutdown at 150°C with 25°C hysteresis, overvoltage protection at 0.7 V FB, and undervoltage lockout on AVIN (2.6 V turn-on, 2.5 V turn-off). The internal 3.3 V bias regulator (VREG) powers control circuitry and supports external compensation via COMP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous - enables compact high-density POL solutions without external current-sense resistors |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V, and 5 V intermediate bus architectures |
| Reference Voltage | 0.6 V ±1% over −40°C to +125°C - ensures tight output accuracy across temperature for 1.0 V–3.3 V fixed/adjustable outputs |
| Switching Frequency | Fixed 620 kHz or 1.2 MHz; adjustable 250 kHz–1.4 MHz - allows EMI optimization and inductor size trade-offs |
| High-Side RDS(on) | 19 mΩ at VBST−VSW = 5 V - reduces conduction loss and improves full-load efficiency at 5 V input |
| Power-Good Accuracy | ±10% FB window with 16-cycle deglitch - provides reliable system-level power sequencing confirmation |
| Enable Threshold | 1.2 V typical with 100 mV hysteresis - supports precise UVLO-controlled startup using resistor dividers |
Pinout & Package
ADP2166ACPZ-R7 is housed in a 24-lead, 4 mm × 4 mm Lead Frame Chip Scale Package (LFCSP) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θJA = 38.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC | Synchronization input | Accepts external clock 250 kHz–1.4 MHz; enables phase alignment (in/out of phase) with RT pin configuration |
| RT | Frequency setting | Resistor-to-GND sets fSW; floating = 620 kHz, tied to VREG = 1.2 MHz - eliminates need for oscillator component |
| TRK | Voltage tracking input | Enables output to follow master rail (e.g., FPGA I/O); error amplifier selects lowest of TRK, SS, or 0.6 V reference |
| SS | Soft start control | Capacitor-to-GND programs ramp time; supports startup into precharged outputs without reverse inductor current |
| COMP | Error amplifier output | External RC network connects here for loop stability tuning - required for all adjustable-output configurations |
| FB | Feedback sense input | Monitors resistor divider output; regulates VOUT to 0.6 V - sets output as VOUT = 0.6 × (1 + RTOP/RBOT) |
| PGOOD | Open-drain power-good | Active-high signal confirms VFB within ±10%; 16-cycle delay prevents false assertions during transients |
| EN | Precision enable input | 1.2 V threshold with internal 1 MΩ pull-down - allows flexible sequencing via external divider or direct PVIN tie |
| BST | Bootstrap supply | 0.1 µF ceramic capacitor to SW generates gate drive for high-side FET - critical for 100% duty cycle capability |
| SW | Switching node | Connects to inductor; carries high di/dt - requires minimized loop area with PVIN and PGND pins |
| PGND | Power ground | Dedicated low-impedance return path for high-current switching; separate from analog GND to reduce noise coupling |
| PVIN | Main power input | Supplies high-side FET and power stage; bypassed with 10–47 µF ceramic capacitor placed adjacent to pin |
| AVIN | Bias supply input | Feeds internal VREG; requires 10 Ω series resistor and local bypass cap - isolates control circuitry from PVIN noise |
| VREG | Internal bias regulator | 3.3 V ±0.2 V output; powers internal logic and COMP amplifier - bypassed with 1 µF ceramic to GND |
| GND | Analog ground | Reference for FB, COMP, and EN circuits; connected to quiet ground plane - kept separate from PGND except at single-point star |
Key Features
| Feature | Design Value |
|---|---|
| Voltage tracking input (TRK) | Enables synchronized ramp-up with master supply (e.g., FPGA core/I/O rails), eliminating sequencing ICs in multi-rail designs |
| Programmable soft start (SS) | Capacitor-based timing allows precise control of inrush current; prevents output collapse during startup into precharged loads |
| External compensation (COMP) | Full control over loop dynamics via RC network - supports wide range of inductors/capacitors while maintaining stability |
| Synchronization with phase shift | SYNC pin accepts external clock; RT pin configures 0° or 180° phase alignment - reduces system-level EMI through frequency coordination |
| Accurate current limit | 7.5 A typical peak limit (ADP2166) with hiccup-mode recovery - protects against sustained overload without latch-off |
Applications
| Communications Baseband Processing | FPGA Core Power Delivery |
|---|---|
Use Scenario: Powering baseband processors in 4G/5G small cells where thermal density and transient response are critical. IC Role / Device Role / Timing Role: Primary POL regulator delivering 1.0 V/1.2 V at up to 6 A with <100 ns load-step response. Use Value: High-side RDS(on) of 19 mΩ and current-mode control achieve >90% efficiency at 1.2 V/4 A, reducing heatsink requirements. | Use Scenario: Supplying configurable logic cores in Xilinx or Intel FPGAs requiring strict voltage tracking between auxiliary and core rails. IC Role / Device Role / Timing Role: Tracking regulator synchronized to I/O rail via TRK pin; enables simultaneous voltage ramp with <10 mV offset. Use Value: TRK-to-FB offset of ±9 mV ensures sub-1% tracking error, meeting FPGA vendor sequencing specifications without external op-amps. |
| Industrial PLC I/O Modules | Medical Imaging Signal Chain |
Use Scenario: Providing isolated 3.3 V and 1.8 V rails in programmable logic controller modules operating in extended temperature ranges. IC Role / Device Role / Timing Role: Dual-output POL solution using fixed 3.3 V and adjustable 1.8 V variants; operates from 5 V backplane. Use Value: −40°C to +125°C junction rating and 2.7 V minimum input ensure reliable startup in cold industrial environments. | Use Scenario: Powering high-speed ADCs and DACs in portable ultrasound systems where low-noise, low-ripple supply is mandatory. IC Role / Device Role / Timing Role: Low-noise POL regulator with external compensation enabling <10 mVpp output ripple at 1.5 V/3 A. Use Value: 0.6 V reference tolerance of ±1% and FB bias current <0.1 µA minimize output voltage drift across temperature and load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54620RGYT | 6 A output, 2.95 V–17 V input, 3.5 mΩ/1.8 mΩ FETs, fixed 600 kHz or syncable 200 kHz–1.6 MHz | Wider input range suits 12 V intermediate bus; higher FET integration reduces external component count | Prefer TPS54620RGYT when input exceeds 5.5 V or board space is constrained by need for fewer passives |
| MP2315GJ-Z | 6 A output, 4.5 V–28 V input, 30 mΩ/22 mΩ FETs, fixed 500 kHz, no TRK or SYNC | Lacks voltage tracking and synchronization; simpler design but unsuitable for multi-rail sequencing | Choose MP2315GJ-Z for cost-sensitive, single-rail 5 V–12 V applications where tracking and EMI coordination are not required |
Compared with TPS54620RGYT and MP2315GJ-Z, the ADP2166ACPZ-R7 uniquely combines 6 A capability with dedicated TRK input and ±9 mV tracking accuracy, making it optimal for FPGA/ASIC core-I/O sequencing - whereas TPS54620RGYT offers broader input flexibility and MP2315GJ-Z prioritizes BOM simplicity over advanced features.
Availability
ADP2166ACPZ-R7 is available at Aetrix Electronics and suitable for communications infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADP2166ACPZ-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.
The ADP2166ACPZ-R7 belongs to Analog Devices' high-efficiency synchronous buck regulator product line, designed specifically for demanding point-of-load applications requiring accurate voltage tracking, robust protection, and thermal resilience in compact 4 mm × 4 mm packages.
FAQ
What is the maximum continuous output current supported by the ADP2166ACPZ-R7?
The ADP2166ACPZ-R7 supports 6 A continuous output current under typical thermal conditions (θJA = 38.3°C/W, 4-layer PCB). This rating assumes proper layout with exposed pad soldered to ground plane and ambient temperature ≤85°C. Peak current limit is 7.5 A (typical), with hiccup-mode protection engaging above that threshold. Derating applies at higher junction temperatures or reduced airflow.
Does the ADP2166ACPZ-R7 support startup into a precharged output?
Yes, the ADP2166ACPZ-R7 supports startup into a precharged output. Its soft start circuit monitors the FB pin voltage during ramp-up and prevents reverse inductor current that would discharge the output capacitor. When the SS voltage exceeds the FB voltage, normal regulation begins - ensuring safe, controlled startup without output collapse or excessive stress on input capacitors.
How is the switching frequency configured on the ADP2166ACPZ-R7?
The ADP2166ACPZ-R7 switching frequency is configured via the RT pin: floating sets 620 kHz, connection to VREG sets 1.2 MHz, and a resistor to GND programs 250 kHz–1.4 MHz using RRT (kΩ) = 60,000/[fSW (kHz) + 10] − 5. The SYNC pin also accepts external clocks in the same 250 kHz–1.4 MHz range, with RT pin determining phase alignment (in-phase or 180° out-of-phase).
What is the function of the TRK pin on the ADP2166ACPZ-R7?
The TRK pin on the ADP2166ACPZ-R7 enables voltage tracking by feeding an external master voltage (e.g., FPGA I/O rail) into the error amplifier's positive input. The regulator adjusts its output to match the TRK voltage minus a fixed offset (±9 mV), allowing coordinated ramp-up with another supply. If unused, TRK must be tied to VREG to disable tracking and default to 0.6 V reference regulation.
What protection features are integrated into the ADP2166ACPZ-R7?
The ADP2166ACPZ-R7 integrates undervoltage lockout (AVIN <2.5 V disables operation), overvoltage protection (FB >0.7 V triggers low-side conduction then shutdown), overcurrent protection (7.5 A peak limit with hiccup-mode recovery), and thermal shutdown (150°C trip with 25°C hysteresis). All protections are fully autonomous and require no external components to activate.
ADP2166ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.95V
- Current - Output:
- 6A
- Frequency - Switching:
- 250kHz ~ 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LFCSP (4x4)
ADP2166ACPZ-R7 FAQ
1.How can I place an order for ADP2166ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2166ACPZ-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 ADP2166ACPZ-R7 reliable?
The price and inventory of ADP2166ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2166ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP2166ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2166ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2166ACPZ-R7?
ADP2166ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2166ACPZ-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 ADP2166ACPZ-R7?
For technical support, including ADP2166ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2166ACPZ-R7 requirements.
6.How does Aetrix verify that ADP2166ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2166ACPZ-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 ADP2166ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP2166ACPZ-R7?
All ADP2166ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2166ACPZ-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 ADP2166ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP2166ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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