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Analog Devices Inc. ADP2166ACPZ-3.3-R7
- Part No.:
- ADP2166ACPZ-3.3-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP2166ACPZ-3.3-R7.pdf
- Description:
- IC REG BUCK 3.3V 6A 24LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,255
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Product details
Overview
ADP2166ACPZ-3.3-R7 from Analog Devices is a 6 A, synchronous step-down DC-DC regulator with fixed 3.3 V output, 2.7 V–5.5 V input range, 620 kHz/1.2 MHz selectable switching frequency, and integrated 19 mΩ high-side/15 mΩ low-side MOSFETs. It delivers high efficiency in point-of-load applications for FPGA core/I/O rail sequencing.
For engineers reviewing the ADP2166ACPZ-3.3-R7 datasheet, ADP2166ACPZ-3.3-R7 pinout, ADP2166ACPZ-3.3-R7 application, or ADP2166ACPZ-3.3-R7 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply support for industrial and embedded power designs.
Technical Context
The ADP2166ACPZ-3.3-R7 uses current-mode PWM control with external compensation, enabling stable loop tuning across wide load and input variations. Its integrated dual-NFET power stage supports continuous 6 A output with precision 0.6 V ±1% reference and voltage tracking for multi-rail sequencing.
It features programmable soft start (via SS capacitor), synchronization to external clocks (250 kHz–1.4 MHz), phase-shift selection (in-phase/out-of-phase), and robust protection including hiccup-mode overcurrent, thermal shutdown at 150°C, and ±10% PGOOD monitoring with 16-cycle deglitching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous - supports high-density FPGA or ASIC core rails without external current boosting. |
| 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. |
| Fixed Output Voltage | 3.3 V ±1% - eliminates external feedback resistors and reduces BOM count for standard I/O rail generation. |
| Switching Frequency | 620 kHz (RT floating) or 1.2 MHz (RT to VREG) - balances efficiency vs. size; enables compact 1 µH inductor selection. |
| High-Side RDS(on) | 19 mΩ @ VBST−VSW = 5 V - minimizes conduction loss at full load, improving thermal margin in 4 mm × 4 mm LFCSP. |
| Low-Side RDS(on) | 15 mΩ @ VPVIN = 5 V - enables high-efficiency synchronous rectification, reducing heat dissipation vs. diode-based solutions. |
| Reference Voltage | 0.6 V ±1% over −40°C to +125°C - ensures tight output regulation across automotive and industrial temperature ranges. |
Pinout & Package
ADP2166ACPZ-3.3-R7 is housed in a thermally enhanced 24-lead, 4 mm × 4 mm LFCSP package with exposed pad soldered to PCB ground plane for optimal thermal dissipation (θJA = 38.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SYNC) | Synchronization input | Accepts external clock (250 kHz–1.4 MHz); RT pin configures in-phase or 180° out-of-phase alignment for EMI reduction. |
| 2 (RT) | Frequency setting | Resistor-to-GND sets fSW (250 kHz–1.4 MHz); floating = 620 kHz, tied to VREG = 1.2 MHz. |
| 3 (TRK) | Tracking input | Enables output voltage to follow master rail (e.g., FPGA VCCINT); connects to resistor divider for precise sequencing. |
| 4 (SS) | Soft start control | Capacitor-to-GND programs ramp time; prevents inrush current during startup into precharged outputs. |
| 5 (COMP) | Error amplifier output | Connects to external RC network for loop compensation; enables stability optimization across load/transient conditions. |
| 6 (FB) | Feedback sense | Monitors output via resistor divider; regulates to 0.6 V reference - not used in fixed 3.3 V version but retained for flexibility. |
| 7 (GND) | Analog ground | Reference for internal circuitry; must be connected to clean analog ground plane, separate from PGND where possible. |
| 8 (PGOOD) | Power-good open-drain | Asserts after FB stabilizes within ±10% for 16 switching cycles; requires external 100 kΩ pull-up for system sequencing. |
| 9 (BST) | Bootstrap supply | Drives high-side gate; requires 0.1 µF X7R/X5R ceramic capacitor between BST and SW for reliable boot operation. |
| 10–13 (PGND) | Power ground | Four dedicated pins minimize ground impedance; connect directly to output capacitor return and exposed pad. |
| 14–17 (SW) | Switching node | Four parallel pins reduce trace inductance; connects to inductor and BST capacitor; critical for EMI and efficiency. |
| 18–21 (PVIN) | Power input | Four input pins distribute high di/dt current; bypass with ≥10 µF ceramic capacitor placed adjacent to PVIN pins. |
| 22 (AVIN) | Bias voltage input | Supplies internal regulator; connect 10 Ω resistor from PVIN and 1 µF ceramic cap to GND for noise isolation. |
| 23 (EN) | Precision enable | 1.2 V threshold with 100 mV hysteresis; internal 1 MΩ pull-down ensures default disable; supports controlled power-up sequencing. |
| 24 (VREG) | Internal bias regulator | 3.3 V ±6% output powers internal logic; bypass with 1 µF ceramic cap to GND; supplies RT and TRK bias currents. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage tracking input (TRK) | Enables precise sequencing of multiple rails (e.g., FPGA VCCIO tracking VCCINT), eliminating need for external supervisors. |
| Programmable soft start (SS) | Capacitor-controlled ramp prevents inrush into precharged loads - critical for hot-swap and multi-rail systems. |
| External compensation (COMP) | Allows loop tuning for varied inductor/capacitor combinations and load profiles, ensuring stability under dynamic conditions. |
| Power-good with deglitching (PGOOD) | 16-cycle validation window rejects transient glitches, providing reliable system reset signaling for downstream logic. |
| Synchronization with phase shift (SYNC + RT) | Reduces system-level EMI by aligning switching edges across multiple converters - essential for dense PCB layouts. |
Applications
| FPGA Core & I/O Sequencing | Industrial PLC Power Management |
|---|---|
Use Scenario: Simultaneous startup of FPGA VCCINT (1.2 V) and VCCIO (3.3 V) with controlled ramp alignment. IC Role / Device Role / Timing Role: ADP2166ACPZ-3.3-R7 serves as the 3.3 V I/O rail regulator, synchronized and tracked to match core rail ramp rate. Use Value: Eliminates external sequencing ICs; TRK pin ties to core regulator's feedback node, achieving <100 µs tracking error across temperature. |
Use Scenario: Reliable 3.3 V supply for microcontroller, CAN transceiver, and analog front-end in harsh factory environments. IC Role / Device Role / Timing Role: ADP2166ACPZ-3.3-R7 operates as primary point-of-load converter, delivering 6 A with thermal shutdown and UVLO protection. Use Value: 150°C thermal shutdown with 25°C hysteresis ensures graceful degradation under overload; LFCSP package withstands vibration and thermal cycling. |
| Communications Baseband Processing | Medical Imaging Signal Chain |
Use Scenario: Low-noise 3.3 V rail for ADC drivers and RF front-end biasing in 5G small cell base stations. IC Role / Device Role / Timing Role: ADP2166ACPZ-3.3-R7 supplies clean power with adjustable fSW (1.2 MHz) to avoid interference with sensitive IF bands. Use Value: Synchronization capability allows alignment with system clock domain, suppressing beat frequencies and improving SNR by >3 dB. |
Use Scenario: Stable 3.3 V supply for high-speed data acquisition modules in portable ultrasound systems. IC Role / Device Role / Timing Role: ADP2166ACPZ-3.3-R7 provides regulated power with PGOOD confirmation before image capture initiation. Use Value: ±10% PGOOD window with 16-cycle deglitching prevents false triggers during transient load steps from digital processing bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS546B24RVFT | 6 A, 2.7–16 V input, PMBus-enabled, 3.3 V fixed; higher Vin range, digital interface required. | Used where telemetry, margining, or dynamic voltage scaling is needed - not drop-in for analog-only designs. | Select if system requires programmable fault response or real-time efficiency optimization via PMBus. |
| MP2451DT-LF-Z | 3 A, 3.3–36 V input, 3.3 V fixed; lower current rating, no tracking or sync, simpler BOM. | Suitable for cost-sensitive, low-power industrial sensors - insufficient for FPGA or high-current PLC loads. | Choose only when load stays below 3 A and sequencing/sync features are unnecessary. |
Compared with TPS546B24RVFT and MP2451DT-LF-Z, the ADP2166ACPZ-3.3-R7 uniquely balances 6 A capability, analog tracking, and synchronization in a compact LFCSP - making it optimal for space-constrained, multi-rail embedded systems without digital control overhead.
Availability
ADP2166ACPZ-3.3-R7 is available at Aetrix Electronics and suitable for FPGA power delivery, industrial PLCs, communications baseband modules, and medical imaging subsystems requiring stable component supply and long-term production continuity.
Supply support for ADP2166ACPZ-3.3-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 power management semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADP2166ACPZ-3.3-R7 belongs to Analog Devices' ADP216x family of high-current, synchronous step-down regulators designed specifically for demanding point-of-load applications requiring precision sequencing, low EMI, and thermal resilience.
FAQ
What is the maximum continuous output current supported by the ADP2166ACPZ-3.3-R7?
The ADP2166ACPZ-3.3-R7 supports up to 6 A continuous output current under typical thermal conditions (θJA = 38.3°C/W on a 4-layer JEDEC board). This rating assumes proper PCB layout with exposed pad soldered to ground, adequate input/output capacitance, and ambient temperature ≤85°C. Derating applies above 85°C ambient or with reduced airflow.
Does the ADP2166ACPZ-3.3-R7 require external feedback resistors to set its 3.3 V output?
No - the ADP2166ACPZ-3.3-R7 is a fixed-output variant with internal resistor divider configured for 3.3 V ±1%. The FB pin remains functional but does not require external components; it retains compatibility with adjustable versions for design reuse. External resistors are unnecessary unless modifying output voltage via FB override (not recommended for this part number).
Can the ADP2166ACPZ-3.3-R7 operate with an input voltage lower than 3.3 V?
Yes - the ADP2166ACPZ-3.3-R7 operates across a 2.7 V to 5.5 V input range. At 2.7 V input, it maintains regulation at 3.3 V output only if the duty cycle requirement (D ≈ VOUT/VIN ≈ 122%) is physically feasible. Since D > 100% is impossible, the device cannot regulate 3.3 V from inputs below ~3.4 V in continuous conduction mode. Below that, it enters dropout or shuts down per UVLO thresholds.
How does the tracking (TRK) function work on the ADP2166ACPZ-3.3-R7?
The TRK pin on the ADP2166ACPZ-3.3-R7 accepts an external voltage (0–600 mV) and biases the internal error amplifier to regulate VOUT proportionally. For 3.3 V output, a 1:1 tracking ratio is achieved by connecting TRK to a resistor divider tapping 600 mV from the master rail. The ADP2166ACPZ-3.3-R7 then ramps its output to match the master's slope, enabling precise FPGA I/O/core sequencing without external controllers.
What protection features are integrated into the ADP2166ACPZ-3.3-R7?
The ADP2166ACPZ-3.3-R7 integrates undervoltage lockout (UVLO at 2.5 V AVIN), overvoltage protection (OVP at 0.7 V FB), overcurrent protection with hiccup-mode recovery, thermal shutdown at 150°C (25°C hysteresis), and precision enable with 100 mV hysteresis. These ensure robust operation in industrial and medical environments where input transients, load faults, or thermal overload may occur.
ADP2166ACPZ-3.3-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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-3.3-R7 FAQ
1.How can I place an order for ADP2166ACPZ-3.3-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2166ACPZ-3.3-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-3.3-R7 reliable?
The price and inventory of ADP2166ACPZ-3.3-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-3.3-R7 is usually 5 days.
3.What payment methods are accepted for ADP2166ACPZ-3.3-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2166ACPZ-3.3-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2166ACPZ-3.3-R7?
ADP2166ACPZ-3.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2166ACPZ-3.3-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-3.3-R7?
For technical support, including ADP2166ACPZ-3.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2166ACPZ-3.3-R7 requirements.
6.How does Aetrix verify that ADP2166ACPZ-3.3-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2166ACPZ-3.3-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-3.3-R7 meets industry standards.
7.What is the process for return or replacement of ADP2166ACPZ-3.3-R7?
All ADP2166ACPZ-3.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2166ACPZ-3.3-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-3.3-R7 part is unused and in its original packaging.
Return procedure for ADP2166ACPZ-3.3-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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