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Analog Devices Inc. ADP3050ARZ-3.3-RL
- Part No.:
- ADP3050ARZ-3.3-RL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3050ARZ-3.3-RL.pdf
- Description:
- IC REG BUCK BOOST 3.3V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
ADP3050ARZ-3.3-RL from Analog Devices is a monolithic current-mode buck switching regulator with integrated 1 A NPN power switch, fixed 3.3 V output, 200 kHz switching frequency, and 3.6 V to 30 V input range. It delivers stable regulation in industrial power systems, PC peripherals, and automotive pre-regulation applications.
For engineers reviewing the ADP3050ARZ-3.3-RL datasheet, ADP3050ARZ-3.3-RL pinout, ADP3050ARZ-3.3-RL application, or ADP3050ARZ-3.3-RL equivalent, key selection criteria include its fixed 3.3 V output accuracy (±3% over temp/load), cycle-by-cycle current limiting, thermal shutdown, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The ADP3050ARZ-3.3-RL implements peak-current-mode control with internal oscillator at 200 kHz (±15%), feedback reference of 3.30 V (±3%), and cycle-by-cycle current limit set to 1.25 A typical. Its boosted drive stage saturates the internal NPN switch, reducing saturation voltage to 0.95 V max at 1 A load.
It supports configurable topologies (buck, buck-boost, SEPIC) via external component selection, uses no ESR-sensitive compensation, and draws bias current from the regulated 3.3 V output when BIAS pin >2.7 V-enabling high efficiency across wide input ranges including 12 V, 24 V, and 30 V supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6 V to 30 V - supports wide industrial and automotive input rails without external pre-regulation |
| Output Voltage | Fixed 3.3 V ±3% - guaranteed accuracy over −40°C to +85°C and full line/load conditions |
| Switching Frequency | 200 kHz ±15% - enables use of compact 33 µH inductors and standard ceramic/low-ESR output capacitors |
| Output Current | 1 A continuous - limited by internal 1.25 A average current limit and thermal design in SOIC-8 package |
| Feedback Reference | 3.30 V (typ) - directly tied to FB pin; no external divider required for fixed-output operation |
| Shutdown Current | <40 µA - reduces system standby power in battery-backed or energy-sensitive designs |
| Switch Saturation Voltage | 0.95 V max at 1 A - minimizes conduction loss and improves efficiency vs. non-saturating bipolar switches |
Pinout & Package
ADP3050ARZ-3.3-RL is housed in an 8-lead SOIC package (not Pb-free only, thermally enhanced). Pin 1 is SWITCH (emitter node), Pin 2 is BOOST (for saturated drive), Pin 3 is BIAS (output-derived bias supply), Pin 4 is FB (3.3 V reference sense), Pin 5 is COMP (compensation node), Pin 6 is SD (active-low shutdown), Pin 7 is GND, and Pin 8 is IN (main power input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SWITCH | Emitter of internal NPN power switch | Swings between VIN and ~−0.5 V; connects to inductor and catch diode anode in buck topology |
| 2 - BOOST | Boosted gate drive supply | Provides >VIN voltage to saturate NPN switch; requires external boost capacitor and diode |
| 3 - BIAS | Internal bias supply input | Tied to 3.3 V output to reduce input supply current and improve light-load efficiency |
| 4 - FB | Feedback reference input | Directly senses regulated 3.3 V output; no resistor divider needed for fixed-output configuration |
| 5 - COMP | Error amplifier output / compensation node | Accepts RC network for loop stability; clamped to ≤2 V to ensure fast transient response |
| 6 - SD | Active-low shutdown control | Pulled low (<0.4 V) disables switching and reduces quiescent current to <40 µA |
| 7 - GND | Power and signal ground reference | Must connect to low-impedance local ground plane to minimize noise and thermal resistance |
| 8 - IN | Main input power supply | Accepts 3.6–30 V; requires local 22 µF bypass capacitor placed adjacent to this pin |
Key Features
| Feature | Design Value |
|---|---|
| Any-capacitor compatibility | Supports ceramic, tantalum, electrolytic, and OS-CON output capacitors without ESR constraints |
| Configurable topology support | Can be wired as buck, buck-boost, or SEPIC via external component reconfiguration |
| Thermal shutdown protection | Automatically disables switching above +125°C junction temperature to prevent damage |
| Peak input voltage tolerance | Withstands 60 V transients for up to 100 ms - suitable for automotive load-dump environments |
| ADIsimPower™ integration | Fully supported by Analog Devices' web-based design tool for schematic generation, BOM, and performance simulation |
Applications
| Industrial Power Systems | PC Peripheral Power |
|---|---|
Use Scenario: Distributed 3.3 V rail generation from 12 V or 24 V backplane in programmable logic controllers and sensor nodes. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3 V to microcontrollers, ADCs, and digital I/O buffers. Use Value: Maintains ±3% output accuracy across −40°C to +85°C ambient and 100 mA–1 A load range without external trimming. | Use Scenario: Standalone 3.3 V supply for USB hubs, SATA controllers, and PCIe add-in cards operating from ATX 12 V rail. IC Role / Device Role / Timing Role: High-efficiency buck converter replacing linear regulators to reduce heat and board area. Use Value: Achieves >85% efficiency at 500 mA load with 12 V input, enabled by saturated NPN switch and output-derived bias. |
| Automotive Pre-regulation | Battery Charger Auxiliary Supply |
Use Scenario: Pre-regulating 3.3 V for infotainment MCU cores and CAN transceivers from 9–16 V vehicle battery with load-dump immunity. IC Role / Device Role / Timing Role: Input-tolerant buck regulator providing clean, stable 3.3 V before LDO post-regulation. Use Value: Survives 60 V/100 ms transients and maintains regulation down to 3.6 V input - critical for cold-crank operation. | Use Scenario: Generating isolated 3.3 V auxiliary power for charger status LEDs, communication ICs, and battery fuel gauges. IC Role / Device Role / Timing Role: Compact, self-contained DC-DC stage powered from main charging rail (e.g., 12–24 V). Use Value: Enables ultra-low shutdown current (<40 µA) to avoid parasitic drain on lithium-ion battery packs during storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2678-3.3 | 5 A rated, 260 kHz fixed-frequency, requires minimum 47 µH inductor; no BOOST pin or output-derived bias | Higher current capability but larger solution size and lower light-load efficiency | Select LM2678-3.3 only when >1 A output or higher switching frequency is required; ADP3050ARZ-3.3-RL offers better thermal performance in SOIC-8 |
| TPS5430-3.3 | 3 A rated, 500 kHz, integrated MOSFET, requires external compensation; no built-in current foldback | Higher frequency allows smaller magnetics but demands tighter layout for EMI control | Choose TPS5430-3.3 for space-constrained designs needing >1 A; ADP3050ARZ-3.3-RL provides superior transient response and simpler compensation |
Compared with LM2678-3.3 and TPS5430-3.3, the ADP3050ARZ-3.3-RL delivers optimal balance of 1 A capability, SOIC-8 footprint, robust 60 V transient tolerance, and output-derived bias for high light-load efficiency - making it ideal for cost- and space-sensitive industrial and automotive subsystems.
Availability
ADP3050ARZ-3.3-RL is available at Aetrix Electronics and suitable for industrial power systems, PC peripheral power systems, and automotive pre-regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADP3050ARZ-3.3-RL 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, headquartered in Norwood, MA.
The ADP3050 product line delivers monolithic, high-voltage buck regulators optimized for industrial, automotive, and distributed power applications where input transients, wide VIN range, and reliability are critical.
FAQ
What is the guaranteed output voltage accuracy of the ADP3050ARZ-3.3-RL over temperature and load?
The ADP3050ARZ-3.3-RL guarantees ±3% output voltage accuracy over the full industrial temperature range (−40°C to +85°C) and across all specified input voltages (3.6 V to 30 V) and load currents (100 mA to 1 A). This is confirmed in Table 1 of the Rev. C datasheet under "ADP3050-3.3" row for Feedback Voltage (3.20 V to 3.40 V).
Does the ADP3050ARZ-3.3-RL require an external feedback resistor divider?
No, the ADP3050ARZ-3.3-RL is a fixed-output variant with internal 3.3 V reference. The FB pin is internally connected to the 3.3 V regulation point, so no external resistor divider is needed - unlike the adjustable ADP3050AR version which requires R1/R2 to set VOUT.
What is the purpose of the BOOST pin on the ADP3050ARZ-3.3-RL, and how is it implemented?
The BOOST pin on the ADP3050ARZ-3.3-RL supplies a boosted voltage (>VIN) to the drive stage of the internal NPN power switch, enabling saturation and reducing conduction losses. It requires an external bootstrap diode (e.g., 1N4148) and capacitor (e.g., 100 nF) connected between IN and BOOST, as shown in Figure 24 of the datasheet.
Can the ADP3050ARZ-3.3-RL operate in buck-boost or SEPIC configurations?
Yes, the ADP3050ARZ-3.3-RL can be configured as a buck-boost or SEPIC regulator using external component reconnection, as explicitly stated in the FEATURES section and demonstrated in Figure 18 (Inverting Buck-Boost Regulator) on page 18 of the Rev. C datasheet.
What thermal derating applies to the ADP3050ARZ-3.3-RL in SOIC-8 package at elevated ambient temperatures?
The ADP3050ARZ-3.3-RL has θJA = 60.6°C/W (4-layer PCB, non-Pb-free) and operates up to +85°C ambient. At 70°C ambient with 1 A load and 12 V input, junction temperature rises ~61°C above ambient - reaching ~131°C, exceeding the +125°C max junction limit. Derating to ≤800 mA at 70°C ambient is recommended per thermal characterization in Figure 6 and thermal guidelines on page 16.
ADP3050ARZ-3.3-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Buck-Boost, SEPIC
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP3050ARZ-3.3-RL FAQ
1.How can I place an order for ADP3050ARZ-3.3-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3050ARZ-3.3-RL 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 ADP3050ARZ-3.3-RL reliable?
The price and inventory of ADP3050ARZ-3.3-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3050ARZ-3.3-RL is usually 5 days.
3.What payment methods are accepted for ADP3050ARZ-3.3-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3050ARZ-3.3-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3050ARZ-3.3-RL?
ADP3050ARZ-3.3-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3050ARZ-3.3-RL 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 ADP3050ARZ-3.3-RL?
For technical support, including ADP3050ARZ-3.3-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3050ARZ-3.3-RL requirements.
6.How does Aetrix verify that ADP3050ARZ-3.3-RL is sourced from the original manufacturer or authorized distributors?
All ADP3050ARZ-3.3-RL 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 ADP3050ARZ-3.3-RL meets industry standards.
7.What is the process for return or replacement of ADP3050ARZ-3.3-RL?
All ADP3050ARZ-3.3-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3050ARZ-3.3-RL, 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 ADP3050ARZ-3.3-RL part is unused and in its original packaging.
Return procedure for ADP3050ARZ-3.3-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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