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Analog Devices Inc. ADP3050ARZ-3.3-RL7
- Part No.:
- ADP3050ARZ-3.3-RL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3050ARZ-3.3-RL7.pdf
- Description:
- IC REG BUCK BOOST 3.3V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,256
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Product details
Overview
ADP3050ARZ-3.3-RL7 from Analog Devices is a current-mode monolithic buck switching regulator with integrated 1 A NPN power switch, fixed 3.3 V output, 200 kHz switching frequency, 3.6 V to 30 V input range, and ±3% output voltage accuracy over −40°C to +85°C - used in industrial power systems and automotive pre-regulation.
For engineers reviewing the ADP3050ARZ-3.3-RL7 datasheet, ADP3050ARZ-3.3-RL7 pinout, ADP3050ARZ-3.3-RL7 application, or ADP3050ARZ-3.3-RL7 equivalent, key selection criteria include fixed 3.3 V output tolerance (3.20–3.40 V), cycle-by-cycle current limiting, thermal shutdown, BOOST pin drive requirement, and SOIC-8 package compatibility with standard PCB footprints.
Technical Context
The ADP3050ARZ-3.3-RL7 implements current-mode PWM control with an internal oscillator set to 200 kHz (±15%), using a replica of switch current plus ramp for comparator input. Its error amplifier features 1250 µmho transconductance and 300 V/V open-loop gain, referenced to a 1.20 V internal bandgap.
It employs a boosted gate drive stage requiring external BOOST capacitor-diode network to saturate the NPN switch, reducing saturation voltage to ≤0.95 V at 1 A. The BIAS pin enables efficiency optimization by sourcing internal bias current from the regulated output when >2.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V (3.20–3.40 V over line/temperature) - eliminates external feedback divider, simplifies layout. |
| Input Voltage Range | 3.6 V to 30 V continuous - supports wide-range industrial and automotive inputs including 12 V/24 V battery systems. |
| Switch Current Limit | Average 1.0–1.5 A - sets maximum sustainable load current; peak limit 1.5–2.1 A protects against short-circuit transients. |
| Switching Frequency | 170–240 kHz - enables use of compact 33 µH inductors and standard ceramic/electrolytic output capacitors. |
| Feedback Voltage | 3.30 V nominal at FB pin - directly tied to output in fixed-version configuration; no resistor network required. |
| Quiescent Current | 0.7–1.5 mA in normal mode; <40 µA in shutdown - enables low-power standby operation in battery-backed systems. |
| Thermal Range | −40°C to +85°C ambient - qualified for industrial and under-hood automotive environments. |
Pinout & Package
ADP3050ARZ-3.3-RL7 is housed in an 8-lead SOIC package (not Pb-free only, thermally enhanced), with exposed pad not electrically connected. Pin 1 is SWITCH (emitter node), Pin 2 is BOOST (requires external diode/capacitor), Pin 3 is BIAS (connect to VOUT for efficiency), Pin 4 is FB (tied directly to 3.3 V output), Pin 5 is COMP (compensation node), Pin 6 is SD (active-low shutdown), Pin 7 is GND, Pin 8 is IN (input supply).
| 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 - critical high-dI/dt node requiring short trace. |
| 2 - BOOST | Boosted drive voltage source | Accepts externally generated voltage >VIN (e.g., via diode+capacitor); enables NPN saturation, reducing VCE(sat) to ≤0.95 V. |
| 3 - BIAS | Internal bias current source | When >2.7 V, draws most operating current from VOUT instead of VIN - improves light-load efficiency in high VIN/VOUT ratios. |
| 4 - FB | Feedback reference input | Internally compared to 3.30 V threshold; tied directly to output in ADP3050ARZ-3.3-RL7 - no external resistors needed. |
| 5 - COMP | Error amplifier output | Connects to RC compensation network; clamped to ≤2 V internally - limits override capability but ensures fast transient response. |
| 6 - SD | Shutdown control input | Logic-low (<0.4 V) disables regulator, reducing supply current to <40 µA - enables system-level power sequencing. |
| 7 - GND | Analog and power ground | Single-point connection to local ground plane; separates analog sensing from high-current return paths. |
| 8 - IN | Main power input | Accepts 3.6–30 V; requires local 22 µF bypass capacitor placed adjacent to pin - prevents input ripple from affecting regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Any-capacitor compatibility | Supports ceramic, tantalum, electrolytic, and OS-CON output capacitors without ESR constraints - eliminates capacitor qualification effort. |
| Configurable topology | Can be wired as buck, buck-boost, or SEPIC - enables reuse across multiple voltage conversion requirements with same IC. |
| Cycle-by-cycle current limit | Hardware-based per-cycle protection - prevents switch failure during overload or short-circuit without software intervention. |
| Frequency foldback | Reduces switching frequency under overcurrent fault - lowers stress on switch, diode, and magnetics during sustained faults. |
| Thermal shutdown | Activates at junction temperature >125°C - provides fail-safe protection independent of external monitoring circuits. |
Applications
| Industrial Power Systems | Automotive Pre-regulators |
|---|---|
Use Scenario: Distributed 3.3 V rail generation in PLC I/O modules powered from 24 V DC bus. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.3 V to microcontrollers, ADCs, and digital isolators. Use Value: Maintains ±3% output accuracy across −40°C to +85°C and 24 V ±20% input variation - ensures reliable logic-level operation without external supervision. | Use Scenario: Pre-regulation stage before LDO in infotainment head unit supplied from 12 V battery with cold-crank dips to 6 V. IC Role / Device Role / Timing Role: High-efficiency buck converter stepping 6–16 V battery to 3.3 V for downstream PMIC and SoC core rails. Use Value: Operates down to 3.6 V input and delivers 1 A continuously - sustains function during cold-crank while minimizing heat buildup in confined enclosure. |
| PC Peripheral Power | Battery Charger Auxiliary Rails |
Use Scenario: Standalone 3.3 V supply for USB-C dock expansion ports, supporting hot-plug detection and PD communication ICs. IC Role / Device Role / Timing Role: Isolated secondary-side regulator fed from isolated flyback output, providing noise-clean 3.3 V for USB PHY and MCU. Use Value: Low 20 µA shutdown current and fast transient response (<100 µs recovery) prevent brownouts during port enumeration bursts. | Use Scenario: Auxiliary 3.3 V rail in multi-cell Li-ion charger managing display, keypad, and fuel-gauge ICs. IC Role / Device Role / Timing Role: Non-isolated buck converter deriving 3.3 V from main charger IC's 5 V auxiliary output. Use Value: BOOST-driven saturation reduces conduction loss - extends runtime by >2% vs. conventional bipolar switchers at 500 mA load. |
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 switch, 260 kHz fixed frequency, requires minimum 47 µH inductor, no BOOST pin | Higher current capacity but larger solution size; lacks BIAS pin efficiency optimization | Choose LM2678-3.3 only if >1 A load or higher-frequency operation is required; ADP3050ARZ-3.3-RL7 offers smaller footprint and better light-load efficiency. |
| TPS5430-3.3 | 3 A switch, 500 kHz, integrated MOSFET, requires external compensation, no BIAS pin | Higher switching frequency enables smaller magnetics but increases EMI filtering complexity | Choose TPS5430-3.3 for space-constrained designs needing >1 A; ADP3050ARZ-3.3-RL7 provides simpler layout and proven robustness in industrial ambient conditions. |
Compared with LM2678-3.3 and TPS5430-3.3, ADP3050ARZ-3.3-RL7 delivers optimal balance of 1 A capability, SOIC-8 footprint, BOOST-enhanced efficiency, and industrial temperature qualification - making it preferred for cost-sensitive, thermally constrained 3.3 V point-of-load applications.
Availability
ADP3050ARZ-3.3-RL7 is available at Aetrix Electronics and suitable for industrial power systems, automotive pre-regulators, and PC peripheral power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADP3050ARZ-3.3-RL7 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 current-mode buck regulators optimized for wide-input industrial and automotive power conversion - emphasizing ruggedness, capacitor flexibility, and ease of design with ADIsimPower tool integration.
FAQ
What is the guaranteed output voltage tolerance for ADP3050ARZ-3.3-RL7 across temperature and line?
The ADP3050ARZ-3.3-RL7 guarantees output voltage within 3.20 V to 3.40 V (±3.0%) over the full industrial temperature range (−40°C to +85°C) and input voltage range (3.6 V to 30 V), as specified in Table 1 of the Rev. C datasheet. This tolerance includes initial accuracy, line regulation (0.005%/V), and load regulation (±0.5%/A), ensuring stable 3.3 V operation without post-production trimming.
Does ADP3050ARZ-3.3-RL7 require an external BOOST capacitor and diode?
Yes, ADP3050ARZ-3.3-RL7 requires an external diode and capacitor connected to the BOOST pin (Pin 2) to generate a voltage higher than VIN. This boosted voltage drives the NPN power switch into saturation, reducing VCE(sat) to ≤0.95 V and improving efficiency. Typical implementation uses a Schottky diode (e.g., 1N5818) and 100 nF ceramic capacitor, as shown in Figure 24 of the datasheet.
Can ADP3050ARZ-3.3-RL7 operate with ceramic output capacitors?
Yes, ADP3050ARZ-3.3-RL7 is explicitly designed for unconditional stability with any output capacitor type - including ceramic, tantalum, electrolytic, and OS-CON - regardless of ESR value. This eliminates capacitor selection constraints and allows use of low-ESR ceramics for reduced size and improved transient response, as confirmed in the General Description section.
What is the maximum allowable peak input voltage for ADP3050ARZ-3.3-RL7?
The absolute maximum peak input voltage for ADP3050ARZ-3.3-RL7 is +60 V for durations ≤100 ms, as stated in Table 2 (Absolute Maximum Ratings). Continuous operation must remain within 3.6 V to +40 V. This 60 V rating supports automotive load-dump transient immunity when paired with appropriate input protection circuitry.
How does the BIAS pin improve system efficiency in ADP3050ARZ-3.3-RL7?
The BIAS pin (Pin 3) improves system efficiency by sourcing >90% of the ADP3050ARZ-3.3-RL7's internal operating current from the regulated 3.3 V output instead of the higher VIN when BIAS voltage exceeds 2.7 V. This reduces input supply current draw - especially beneficial in high VIN/VOUT ratios (e.g., 24 V → 3.3 V) - and is validated in Figure 5 of the datasheet showing up to 2× lower quiescent current into IN pin.
ADP3050ARZ-3.3-RL7 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-RL7 FAQ
1.How can I place an order for ADP3050ARZ-3.3-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3050ARZ-3.3-RL7 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-RL7 reliable?
The price and inventory of ADP3050ARZ-3.3-RL7 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-RL7 is usually 5 days.
3.What payment methods are accepted for ADP3050ARZ-3.3-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3050ARZ-3.3-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3050ARZ-3.3-RL7?
ADP3050ARZ-3.3-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3050ARZ-3.3-RL7 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-RL7?
For technical support, including ADP3050ARZ-3.3-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3050ARZ-3.3-RL7 requirements.
6.How does Aetrix verify that ADP3050ARZ-3.3-RL7 is sourced from the original manufacturer or authorized distributors?
All ADP3050ARZ-3.3-RL7 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-RL7 meets industry standards.
7.What is the process for return or replacement of ADP3050ARZ-3.3-RL7?
All ADP3050ARZ-3.3-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3050ARZ-3.3-RL7, 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-RL7 part is unused and in its original packaging.
Return procedure for ADP3050ARZ-3.3-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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