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Analog Devices Inc. ADP2303ARDZ-5.0-R7
- Part No.:
- ADP2303ARDZ-5.0-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
ADP2303ARDZ-5.0-R7.pdf
- Description:
- IC REG BUCK 5V 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:999
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Product details
Overview
ADP2303ARDZ-5.0-R7 from Analog Devices is a nonsynchronous step-down DC/DC regulator with integrated high-side MOSFET, delivering up to 3 A continuous output current at fixed 5.0 V output, operating from 3.0 V to 20 V input, and featuring ±1.5% output accuracy over temperature, 700 kHz switching frequency, and power-good signaling. It serves as a compact, thermally robust intermediate power rail converter in space-constrained industrial and communications systems.
For engineers reviewing the ADP2303ARDZ-5.0-R7 datasheet, ADP2303ARDZ-5.0-R7 pinout, ADP2303ARDZ-5.0-R7 application, or ADP2303ARDZ-5.0-R7 equivalent, key selection criteria include verified 3 A load capability at 5.0 V, SOIC_N_EP thermal performance (θJA = 58.5°C/W), precision enable threshold (1.2 V typ. with 100 mV hysteresis), integrated bootstrap diode, and PGOOD open-drain sequencing support.
Technical Context
The ADP2303ARDZ-5.0-R7 employs fixed-frequency, peak current-mode PWM control with automatic transition to pulse-skip mode at light loads for efficiency optimization. Its internal compensation eliminates external loop components, while slope compensation prevents subharmonic oscillation above 50% duty cycle.
It integrates critical protection functions including undervoltage lockout (UVLO rising at 2.9 V, falling at 2.4 V), overcurrent protection (5.5 A typical peak limit), thermal shutdown (150°C trip with 15°C hysteresis), and overvoltage protection triggered at FB > 0.880 V. The bootstrap circuit delivers ~5.0 V gate drive referenced to SW, requiring only a 0.1 µF BST–SW capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±1.5% over −40°C to +125°C junction temperature - ensures stable logic supply without external feedback resistors. |
| Max Output Current | 3 A continuous - supports demanding point-of-load applications such as FPGA I/O banks or multi-core processors. |
| Input Voltage Range | 3.0 V to 20 V - accommodates wide-input industrial rails, automotive battery transients, and telecom intermediate buses. |
| Switching Frequency | 700 kHz (595–805 kHz range) - enables use of small 1–15 µH inductors and low-ESR ceramic output capacitors for compact layout. |
| Feedback Accuracy | 4.925 V to 5.075 V at VOUT = 5.0 V - guarantees tight regulation for sensitive analog or mixed-signal circuits. |
| Power-Good Threshold | 87.5% of nominal (4.375 V) with 2.5% hysteresis - provides reliable system sequencing and fault detection without external comparators. |
| Enable Threshold | 1.2 V typical with 100 mV hysteresis - allows precise power-up sequencing from other supplies using simple resistive dividers. |
Pinout & Package
ADP2303ARDZ-5.0-R7 is housed in an 8-lead SOIC_N_EP package with exposed paddle, optimized for thermal dissipation on PCB ground planes (θJA = 58.5°C/W). The exposed pad must be soldered to a thermal land for safe 3 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Provides floating gate drive voltage for internal high-side MOSFET; requires 0.1 µF X5R/X7R capacitor to SW. |
| VIN | Main power input | Accepts 3.0–20 V input; must be bypassed with low-ESR ceramic capacitor directly to GND for stability. |
| EN | Enable control | Logic-level input with 1.2 µA internal pull-down; enables device when ≥1.2 V applied, disables below 1.1 V. |
| PGOOD | Power-good indicator | Open-drain output asserting high when VOUT is within ±12.5% of 5.0 V; requires external pull-up resistor. |
| FB | Feedback sense | Internally connected to 5.0 V output; no external divider needed - simplifies design and improves accuracy. |
| NC | No-connect | Internal test pin; must be left floating or tied to GND per datasheet to ensure proper operation. |
| GND | Ground reference | Primary return path for power and control circuits; must connect to exposed pad and system ground plane. |
| SW | Switch node | Drives external inductor; connects to cathode of catch diode and inductor; high dv/dt node requiring careful layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | RDS(ON) = 120 mΩ typical - eliminates external switch, reduces BOM count, and improves efficiency at 3 A load. |
| Automatic PFM/PWM mode | Seamless transition between fixed-frequency PWM and pulse-skip mode - maintains >85% efficiency from 10 mA to 3 A load. |
| Internal soft start | 2048 clock cycles (~2.9 ms at 700 kHz) - limits inrush current during startup and prevents output overshoot. |
| Integrated bootstrap diode | Eliminates need for external bootstrap diode - reduces component count, layout area, and potential failure points. |
| Thermal shutdown with hysteresis | 150°C trip / 135°C recovery - protects against sustained overload or poor heatsinking without oscillatory shutdown. |
Applications
| Industrial PLC I/O Modules | Telecom Line Cards |
|---|---|
|
Use Scenario: Powering isolated digital I/O channels and analog sensor interfaces in programmable logic controllers under wide ambient temperature and input voltage variation. IC Role / Device Role / Timing Role: Primary 5 V intermediate rail regulator converting 12–24 V backplane supply to clean, sequenced logic voltage for microcontrollers and level shifters. Use Value: ±1.5% output accuracy and −40°C to +125°C operation ensure reliable interface timing across harsh factory environments. |
Use Scenario: Generating local 5 V supply for Ethernet PHYs, SerDes transceivers, and management microcontrollers on dense line cards with strict thermal budgets. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down regulator replacing discrete buck solutions to meet board area constraints and EMI requirements. Use Value: 700 kHz switching and SOIC_N_EP package enable <1 cm² solution size while maintaining >90% peak efficiency at 2 A. |
| Medical Imaging Subsystems | Automotive Infotainment ECUs |
|
Use Scenario: Supplying noise-sensitive analog front-ends (AFE) and ADCs in portable ultrasound or patient monitoring devices with battery and adapter inputs. IC Role / Device Role / Timing Role: Low-noise, well-regulated 5 V rail supporting precision signal chain components requiring stable reference and clock distribution. Use Value: Integrated soft start and PGOOD output enable controlled power sequencing to prevent data corruption during cold boot. |
Use Scenario: Converting 9–16 V vehicle battery voltage to regulated 5 V for USB hubs, display controllers, and audio codecs in head units. IC Role / Device Role / Timing Role: Robust DC/DC converter handling automotive load dump (up to 24 V) and cold-crank (down to 3 V) conditions without dropout. Use Value: UVLO with 2.9 V turn-on / 2.4 V turn-off and 20 V absolute max rating ensure uninterrupted operation during engine cranking events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonsynchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678SD-5.0/NOPB | 5 A rated, 260 kHz switching, requires external bootstrap diode and compensation network. | Higher current but larger solution size; less suitable for space-constrained designs needing 700 kHz operation. | Choose when higher output current (>3 A) and lower EMI are prioritized over board area and component count. |
| TPS54332DR | 3 A, 1 MHz, synchronous rectification, adjustable output; no integrated bootstrap diode. | Higher efficiency at light loads due to synchronous operation, but requires external FET drivers and more complex layout. | Prefer when >92% efficiency across full load range is critical and design can accommodate additional external components. |
Compared with LM2678SD-5.0/NOPB and TPS54332DR, ADP2303ARDZ-5.0-R7 offers the smallest total solution footprint with zero external compensation, integrated bootstrap diode, and guaranteed 3 A performance in an industry-standard SOIC package - ideal for rapid deployment in cost- and space-sensitive industrial designs.
Availability
ADP2303ARDZ-5.0-R7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line cards, medical imaging subsystems, and automotive infotainment ECUs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for ADP2303ARDZ-5.0-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.
ADP2303ARDZ-5.0-R7 belongs to the ADP230x family of nonsynchronous step-down regulators designed specifically for compact, thermally efficient intermediate power conversion in space-constrained embedded systems where simplicity, reliability, and wide input range are essential.
FAQ
What is the maximum continuous output current of the ADP2303ARDZ-5.0-R7?
The ADP2303ARDZ-5.0-R7 delivers up to 3 A continuous output current at its fixed 5.0 V output, validated across the full −40°C to +125°C junction temperature range. This rating assumes proper PCB thermal design with the exposed paddle soldered to a minimum 200 mm² copper thermal pad and adequate airflow. Peak current capability reaches 5.5 A before overcurrent protection triggers.
Does the ADP2303ARDZ-5.0-R7 require external feedback resistors?
No, the ADP2303ARDZ-5.0-R7 does not require external feedback resistors. As a fixed-output variant, its FB pin is internally connected to the 5.0 V output, eliminating external divider components and associated tolerance errors. This simplifies layout, improves regulation accuracy (±1.5%), and reduces bill-of-materials cost compared to adjustable versions like ADP2303ARDZ-R7.
How does the ADP2303ARDZ-5.0-R7 handle thermal overload conditions?
The ADP2303ARDZ-5.0-R7 incorporates thermal shutdown with a 150°C trip point and 15°C hysteresis. When junction temperature exceeds 150°C, the device disables the high-side MOSFET and initiates soft start upon cooling below 135°C. This behavior is fully characterized in the datasheet and requires no external circuitry - ensuring robust protection during sustained overload or inadequate heatsinking.
Can the ADP2303ARDZ-5.0-R7 operate with a 3.3 V input supply?
Yes, the ADP2303ARDZ-5.0-R7 operates down to 3.0 V input, making it compatible with 3.3 V rails. However, at VIN = 3.3 V, the 5.0 V output cannot be sustained due to duty-cycle limitations and bootstrap voltage constraints. For 5.0 V output, minimum recommended input is 5.5 V; for lower inputs, consider the ADP2303ARDZ-3.3-R7 or ADP2303ARDZ-2.5-R7 variants.
What is the purpose of the PGOOD pin on the ADP2303ARDZ-5.0-R7?
The PGOOD pin on the ADP2303ARDZ-5.0-R7 is an open-drain output that asserts high when the regulated 5.0 V output is within ±12.5% of nominal (i.e., 4.375 V to 5.625 V), with a 32-clock-cycle deglitch time. It enables precise power sequencing of downstream ICs (e.g., FPGAs or microcontrollers) and fault monitoring without external supervision circuitry - directly supporting system-level reliability requirements.
ADP2303ARDZ-5.0-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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- 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
ADP2303ARDZ-5.0-R7 FAQ
1.How can I place an order for ADP2303ARDZ-5.0-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2303ARDZ-5.0-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 ADP2303ARDZ-5.0-R7 reliable?
The price and inventory of ADP2303ARDZ-5.0-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2303ARDZ-5.0-R7 is usually 5 days.
3.What payment methods are accepted for ADP2303ARDZ-5.0-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2303ARDZ-5.0-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2303ARDZ-5.0-R7?
ADP2303ARDZ-5.0-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2303ARDZ-5.0-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 ADP2303ARDZ-5.0-R7?
For technical support, including ADP2303ARDZ-5.0-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2303ARDZ-5.0-R7 requirements.
6.How does Aetrix verify that ADP2303ARDZ-5.0-R7 is sourced from the original manufacturer or authorized distributors?
All ADP2303ARDZ-5.0-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 ADP2303ARDZ-5.0-R7 meets industry standards.
7.What is the process for return or replacement of ADP2303ARDZ-5.0-R7?
All ADP2303ARDZ-5.0-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2303ARDZ-5.0-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 ADP2303ARDZ-5.0-R7 part is unused and in its original packaging.
Return procedure for ADP2303ARDZ-5.0-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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