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Analog Devices Inc. ADP2302ARDZ-3.3-R7
- Part No.:
- ADP2302ARDZ-3.3-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ADP2302ARDZ-3.3-R7.pdf
- Description:
- IC REG BUCK 3.3V 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
ADP2302ARDZ-3.3-R7 from Analog Devices is a fixed-output, nonsynchronous step-down DC/DC regulator delivering up to 2 A at 3.3 V from 3.0 V–20 V input, featuring integrated high-side MOSFET, 700 kHz switching frequency, ±1.5% output accuracy over temperature, and power-good signaling - deployed in intermediate power rails for industrial instrumentation and communications equipment.
For engineers reviewing the ADP2302ARDZ-3.3-R7 datasheet, ADP2302ARDZ-3.3-R7 pinout, ADP2302ARDZ-3.3-R7 application, or ADP2302ARDZ-3.3-R7 equivalent, key selection considerations include its 8-lead SOIC_N_EP package with exposed thermal pad, precision enable threshold (1.2 V typ.), internal soft start (2048 clock cycles), UVLO (2.9 V rising), and PGOOD hysteresis (5% window).
Technical Context
The ADP2302ARDZ-3.3-R7 implements fixed-frequency current-mode PWM control with automatic transition to pulse-skip mode at light loads, enabling high efficiency across wide load ranges. Its integrated bootstrap diode and internal compensation eliminate external loop components while supporting stable operation with ceramic output capacitors.
It uses a dedicated BST-SW bootstrap capacitor (0.1 µF) to drive the integrated high-side MOSFET, maintains regulation via FB pin referenced to 3.3 V (±1.5%), and incorporates protection features including overcurrent limiting (4.4 A peak), thermal shutdown (150°C), and undervoltage lockout with 0.5 V hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±1.5% over −40°C to +125°C junction temperature - ensures stable logic rail generation without external feedback resistors. |
| Max Output Current | 2 A continuous - supports mid-power FPGA I/O banks, microcontroller cores, and ASIC auxiliary rails. |
| Input Voltage Range | 3.0 V to 20 V - accommodates 5 V, 12 V, and 19 V input systems including PoE-powered edge nodes and industrial 24 V supplies. |
| Switching Frequency | 700 kHz (595–805 kHz range) - enables compact 1–6.8 µH inductors and low-ESR ceramic output capacitors. |
| Enable Threshold | 1.2 V typical with 100 mV hysteresis - allows precise power sequencing with external resistor dividers from upstream supplies. |
| Power-Good Accuracy | 87.5% of nominal output (2.89 V) with 5% hysteresis - provides reliable system reset and downstream enable coordination. |
| Thermal Shutdown | 150°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design in enclosed enclosures. |
Pinout & Package
ADP2302ARDZ-3.3-R7 is housed in an 8-lead SOIC_N_EP package with exposed thermal pad (EPAD), optimized for thermal dissipation on 4-layer PCBs (θJA = 58.5°C/W). The exposed pad must be soldered to a solid ground plane for safe 2 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side MOSFET gate driver | Requires 0.1 µF X5R/X7R ceramic capacitor to SW; generates ~5.0 V floating gate drive voltage. |
| VIN | Main power input | Accepts 3.0–20 V; requires local 10 µF ceramic bypass capacitor directly to GND for EMI suppression. |
| EN | Enable control with precision threshold | Pulled down internally (1.2 µA); enables at ≥1.2 V, disables at ≤1.1 V - supports programmable UVLO and supply sequencing. |
| PGOOD | Open-drain power-good indicator | Asserts high when FB ≥ 2.89 V (87.5% of 3.3 V); requires external pull-up to ≤20 V for system monitoring. |
| FB | Feedback sense input | Internally connected to 3.3 V output - no external divider needed; monitors regulation accuracy and triggers OVP at 0.880 V. |
| NC | No-connect test pin | Must be left floating or tied to GND; not electrically connected to internal circuitry. |
| GND | Power and signal reference | Primary return path; must be low-impedance connection to PCB ground plane, especially under the EPAD. |
| SW | Switch node output | Drives external inductor; experiences fast dV/dt transitions - requires short, low-inductance layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | 80–160 mΩ RDS(ON) - eliminates external switch, reduces BOM count, and simplifies layout for space-constrained designs. |
| Automatic PFM/PWM mode transition | Seamless shift below pulse-skip threshold - maintains >85% efficiency at 10 mA load while preserving <1% output ripple at full load. |
| Internal soft start | Fixed 2048-clock-cycle ramp (≈2.9 ms at 700 kHz) - prevents inrush current into bulk capacitance during cold start. |
| Integrated bootstrap diode | Eliminates need for external bootstrap diode - reduces component count and improves reliability in high-vibration environments. |
| Undervoltage lockout with hysteresis | 2.9 V turn-on / 2.4 V turn-off - prevents erratic startup during brownout conditions and ensures clean power-up sequencing. |
| Overcurrent and thermal protection | Peak current limit of 4.4 A and 150°C shutdown with 15°C recovery hysteresis - safeguards against short-circuit faults and thermal runaway. |
Applications
| Industrial PLC I/O Module | Medical Patient Monitor Logic Rail |
|---|---|
|
Use Scenario: Powering isolated digital I/O channels and ADC front-ends in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 3.3 V point-of-load regulator converting 24 V bus to logic-level supply for microcontrollers and level-shifted communication interfaces. Use Value: Delivers stable 2 A output with ±1.5% accuracy across −40°C to +85°C ambient, enabling reliable sensor data acquisition without recalibration. |
Use Scenario: Generating clean 3.3 V for ARM-based patient monitor mainboards handling ECG, SpO₂, and display subsystems. IC Role / Device Role / Timing Role: Secondary regulated rail supplying CPU core logic, touch controller, and low-noise analog front-end biasing. Use Value: PGOOD signal synchronizes boot sequence with FPGA configuration, while thermal shutdown prevents overheating in sealed medical enclosures. |
| Telecom Remote Radio Unit | Automotive Infotainment Head Unit |
|
Use Scenario: Converting 48 V PoE-derived input to 3.3 V for baseband processing and RF interface ICs in small-cell radio units. IC Role / Device Role / Timing Role: Intermediate buck stage stepping down from 12 V intermediate rail to low-noise 3.3 V domain for SERDES and clock buffers. Use Value: 700 kHz switching enables use of shielded 2.2 µH inductors, minimizing conducted EMI in sensitive RF receive bands. |
Use Scenario: Providing 3.3 V to infotainment SoC peripherals including USB PHY, CAN transceivers, and audio codecs in automotive head units. IC Role / Device Role / Timing Role: Load-switched secondary regulator enabled only after main 5 V rail stabilizes, ensuring strict power sequencing per OEM requirements. Use Value: Precision EN threshold (1.2 V) and hysteresis allow direct connection to 3.3 V supervisor outputs, eliminating discrete comparator circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678SD-3.3/NOPB | 5 A capability, 260 kHz fixed frequency, external MOSFET required - larger solution size, lower switching loss at high current. | Preferred for higher-current (>2.5 A), lower-EMI applications where board area is less constrained. | Select when needing >2 A output with wider input range (8–40 V) and higher thermal margin; requires external catch diode and compensation. |
| TPS54202DDCR | Synchronous 2 A buck, 4.5–17 V input, 500 kHz, integrated high-/low-side FETs - no external diode, higher light-load efficiency. | Better suited for battery-powered portable devices requiring >90% efficiency at 10–100 mA loads. | Choose for synchronous operation and reduced BOM; lacks PGOOD and has looser output tolerance (±2%) than ADP2302ARDZ-3.3-R7. |
Compared with LM2678SD-3.3/NOPB and TPS54202DDCR, the ADP2302ARDZ-3.3-R7 offers tighter output accuracy (±1.5% vs. ±2%), integrated PGOOD signaling, and smaller footprint due to SOIC_N_EP packaging - making it optimal for space-limited industrial and telecom applications demanding precise rail control.
Availability
ADP2302ARDZ-3.3-R7 is available at Aetrix Electronics and suitable for industrial PLCs, medical patient monitors, telecom remote radio units, and automotive infotainment head units requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP2302ARDZ-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 digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The ADP2302ARDZ-3.3-R7 belongs to Analog Devices' ADP230x family of nonsynchronous buck regulators, designed specifically for compact, cost-sensitive point-of-load conversion in harsh-environment applications requiring robust thermal and fault protection.
FAQ
What is the maximum continuous output current of the ADP2302ARDZ-3.3-R7?
The ADP2302ARDZ-3.3-R7 delivers up to 2 A continuous output current at 3.3 V under typical thermal conditions (θJA = 58.5°C/W on JEDEC 4-layer board). Peak current limit is specified at 4.4 A, but sustained operation above 2 A requires careful thermal design, including proper EPAD grounding and airflow. Derating applies above +85°C ambient.
Does the ADP2302ARDZ-3.3-R7 require external feedback resistors?
No - the ADP2302ARDZ-3.3-R7 is a fixed-output variant with internal feedback network set to 3.3 V. The FB pin is internally connected to the output, eliminating external resistors. This simplifies layout, improves accuracy (±1.5% over temperature), and removes drift sources associated with external divider tolerances and thermal coefficients.
How does the power-good (PGOOD) function work on the ADP2302ARDZ-3.3-R7?
The ADP2302ARDZ-3.3-R7's PGOOD pin is an open-drain output that asserts high when the FB voltage reaches ≥87.5% of 3.3 V (≥2.89 V), with 5% hysteresis (drops low at ≤2.72 V). It includes a 32-clock-cycle deglitch time (~46 µs at 700 kHz) to reject noise-induced false trips. An external pull-up resistor (to ≤20 V) is required for proper logic-level signaling.
Can the ADP2302ARDZ-3.3-R7 operate with a 3.3 V input?
Yes - the ADP2302ARDZ-3.3-R7 supports input voltages as low as 3.0 V. However, at VIN = 3.3 V, the minimum controllable duty cycle and bootstrap voltage margin become critical. Operation is guaranteed only if VIN exceeds VOUT by ≥2.1 V (i.e., ≥5.4 V recommended for robust startup), especially under prebiased conditions. At exactly 3.3 V input, regulation may fail or exhibit instability.
What package type and thermal characteristics apply to the ADP2302ARDZ-3.3-R7?
The ADP2302ARDZ-3.3-R7 uses an 8-lead SOIC_N_EP package with exposed thermal pad (EPAD). Its thermal resistance is θJA = 58.5°C/W on a JEDEC-standard 4-layer board. For reliable 2 A operation, the EPAD must be soldered to a large, low-impedance copper pour tied to GND - insufficient thermal relief causes early thermal shutdown at junction temperatures exceeding 150°C.
ADP2302ARDZ-3.3-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- 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):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
ADP2302ARDZ-3.3-R7 FAQ
1.How can I place an order for ADP2302ARDZ-3.3-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2302ARDZ-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 ADP2302ARDZ-3.3-R7 reliable?
The price and inventory of ADP2302ARDZ-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 ADP2302ARDZ-3.3-R7 is usually 5 days.
3.What payment methods are accepted for ADP2302ARDZ-3.3-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2302ARDZ-3.3-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2302ARDZ-3.3-R7?
ADP2302ARDZ-3.3-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2302ARDZ-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 ADP2302ARDZ-3.3-R7?
For technical support, including ADP2302ARDZ-3.3-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2302ARDZ-3.3-R7 requirements.
6.How does Aetrix verify that ADP2302ARDZ-3.3-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2302ARDZ-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 ADP2302ARDZ-3.3-R7 meets industry standards.
7.What is the process for return or replacement of ADP2302ARDZ-3.3-R7?
All ADP2302ARDZ-3.3-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2302ARDZ-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 ADP2302ARDZ-3.3-R7 part is unused and in its original packaging.
Return procedure for ADP2302ARDZ-3.3-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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