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Analog Devices Inc. ADP3000ARZ-3.3
- Part No.:
- ADP3000ARZ-3.3
- Manufacturer:
- Analog Devices Inc.
- Package:
- -
- Datasheet:
-
ADP3000ARZ-3.3.pdf
- Description:
- IC REG STEP UP/DOWN 3.3V 8SOIC
- Quantity:
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Inventory:975
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Product details
Overview
ADP3000ARZ-3.3 from Analog Devices is a micropower step-up/step-down switching regulator IC delivering fixed 3.3 V output with up to 180 mA load in boost mode (2 V–3.2 V input) and supporting both buck and boost topologies. It operates at 400 kHz, consumes only 500 µA quiescent current in shutdown, and integrates on-chip low-battery detection via its auxiliary gain amplifier. It is used in space-constrained portable power rails for battery-powered instrumentation.
For engineers reviewing the ADP3000ARZ-3.3 datasheet, ADP3000ARZ-3.3 pinout, ADP3000ARZ-3.3 application, or ADP3000ARZ-3.3 equivalent, key selection criteria include input voltage range compatibility (2 V–30 V), fixed 3.3 V output tolerance (±5%), integrated current limiting, thermal performance in SOIC-8 package, and support for both step-up and step-down configurations without external controller logic.
Technical Context
The ADP3000ARZ-3.3 implements pulse frequency modulation (PFM) control with a gated 400 kHz oscillator, enabling ultra-low quiescent current operation (500 µA). Its dual-transistor switch architecture-accessible via separate SW1 (collector) and SW2 (emitter) pins-allows reconfiguration between boost (SW2 to GND) and buck (SW1 to VIN) modes without changing ICs.
Internal circuitry includes a precision 1.245 V reference, comparator with 12.5 mV hysteresis, user-programmable current limit via ILIM pin (e.g., 400 mA with 220 Ω resistor), and an open-collector auxiliary gain block (AO) usable as low-battery detector or error amplifier. Output voltage is laser-trimmed and fixed at 3.3 V ±5% (3.135 V–3.465 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±5% (3.135–3.465 V); laser-trimmed on-die resistors eliminate external feedback network. |
| Input Voltage Range | 2 V–12.6 V in step-up mode; 2 V–30 V in step-down mode - supports single-cell Li-ion, alkaline, and wide-input industrial rails. |
| Switching Frequency | 400 kHz typical (350–450 kHz); enables use of compact 6.8 µH inductors and low-ESR tantalum capacitors. |
| Quiescent Current | 500 µA in shutdown (VFB > 1.43 V); critical for battery life extension in always-on portable systems. |
| Output Current Capability | 180 mA @ 3.3 V from 2 V input (boost); 100 mA @ 3 V from 5 V input (buck) - defines practical load envelope for microcontroller peripherals. |
| Current Limit Accuracy | 400 mA typical with 220 Ω ILIM-to-VIN resistor; temperature coefficient −0.3%/°C ensures stable overcurrent protection across operating range. |
| Thermal Resistance | 150°C/W (RU-14 TSSOP), 170°C/W (R-8 SOIC), 120°C/W (N-8 PDIP); SOIC-8 variant balances PCB area and thermal performance. |
Pinout & Package
ADP3000ARZ-3.3 is packaged in an 8-lead SOIC (R-8) with standard JEDEC MS-012AA outline (4.90 mm × 3.90 mm × 1.75 mm). Pin 1 is marked by notch or dot; device is not pin-compatible with PDIP or TSSOP variants due to differing pin counts and functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM | Current limit programming input | Connect to VIN for max current (1.5 A); add 220 Ω resistor to VIN for 400 mA limit - sets peak switch current to prevent inductor saturation. |
| VIN | Main power input | Supplies internal circuitry and powers switch; accepts 2–30 V depending on topology - must be decoupled with ≥10 µF low-ESR capacitor. |
| SW1 | Power transistor collector | In boost: drives inductor; in buck: connects to input rail - handles up to 1.5 A peak, requires Schottky catch diode in boost configuration. |
| SW2 | Power transistor emitter | In boost: tied to GND; in buck: drives inductor - must not go more than −350 mV below GND; requires series Schottky diode if VOUT > 6 V. |
| FB/SENSE | Output voltage sense input | Internally connected to laser-trimmed divider for 3.3 V regulation - connect directly to output; no external resistors needed. |
| GND | Analog and power ground | Common reference for all internal blocks; requires low-impedance connection to PCB ground plane to minimize noise and thermal rise. |
| SET | Auxiliary amplifier non-inverting input | Accepts resistor divider from VIN for low-battery detection; bias current 200–400 nA - high-impedance node sensitive to leakage. |
| AO | Auxiliary amplifier open-collector output | Sinks ≥300 µA; used for battery alarm or post-regulator control - requires external pull-up to logic rail (e.g., 5 V or 3.3 V). |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/step-down topology flexibility | Single IC supports both boost (2–3.2 V → 3.3 V/180 mA) and buck (5 V → 3 V/100 mA) without redesign - reduces BOM count and layout iterations. |
| Integrated low-battery detector | Auxiliary gain block (SET/AO pins) enables programmable undervoltage lockout - eliminates need for discrete supervisor IC in battery-powered instruments. |
| Ultra-low quiescent current | 500 µA shutdown IQ extends shelf life and runtime in standby - critical for medical sensors and remote telemetry nodes. |
| User-adjustable current limit | External resistor on ILIM pin sets switch current from 400 mA to 1.5 A - allows optimization of inductor size, efficiency, and thermal margin per application. |
| Laser-trimmed fixed output | 3.3 V ±5% accuracy achieved via on-die trimming - removes external feedback resistors, improves long-term stability, and simplifies layout. |
Applications
| Portable Instrumentation Power | Single-Cell Li-ion Boost Rail |
|---|---|
Use Scenario: Powering 3.3 V microcontrollers and analog front-ends in handheld multimeters and gas detectors with 2 V–3.2 V alkaline or NiMH input. IC Role / Device Role / Timing Role: Primary DC-DC converter providing regulated 3.3 V rail; operates in step-up mode with PFM control to maximize battery life. Use Value: Delivers 180 mA at 75% typical efficiency from 2 V input - sustains full functionality during deep discharge while minimizing heat in sealed enclosures. | Use Scenario: Generating stable 3.3 V supply from 2.5 V–4.2 V single-cell Li-ion battery in portable data loggers. IC Role / Device Role / Timing Role: Fixed-output boost regulator with integrated low-battery monitoring via AO pin - triggers MCU shutdown before cell damage. Use Value: Combines regulation and battery supervision in one SOIC-8 package - reduces component count by two vs. discrete regulator + supervisor solution. |
| Industrial Sensor Node Supply | Low-Power Hard Disk Drive Interface |
Use Scenario: Providing isolated 3.3 V rail for MEMS sensor signal conditioning in battery-backed industrial wireless nodes. IC Role / Device Role / Timing Role: Micropower step-down regulator converting 5 V system rail to 3.3 V sensor interface voltage - operates in buck mode with 100 mA capability. Use Value: 500 µA shutdown current preserves backup battery for >1 year - enables maintenance-free operation in inaccessible locations. | Use Scenario: Powering 3.3 V logic and interface circuits in 2.5-inch HDDs where input is derived from 5 V or 12 V main rail. IC Role / Device Role / Timing Role: Compact buck converter with fast transient response - supplies burst-mode loads during head actuation and data transfer. Use Value: 400 kHz switching enables <10 mm² solution size with 6.8 µH inductor - meets strict mechanical constraints of slim HDD form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Fixed 3.3 V output; 28 V max input; 28 µA IQ (not shutdown); 1.2 MHz switching; 0.5 A switch current. | Better light-load efficiency but lacks step-down capability and integrated low-battery detection. | Select when ultra-low IQ in active mode is prioritized over topology flexibility and supervisor integration. |
| LT1931IS5#TRMPBF | Fixed 3.3 V output; 16 V max input; 100 µA IQ; 1.2 MHz; 1.2 A switch; no buck mode support. | Higher switching frequency enables smaller passives but no step-down operation or AO-based monitoring. | Choose for space-constrained boost-only designs requiring higher output current and faster transient response. |
Compared with TPS61040DRVR and LT1931IS5#TRMPBF, ADP3000ARZ-3.3 uniquely supports both step-up and step-down topologies in one IC while integrating a configurable gain block for battery monitoring - reducing total component count and PCB area in dual-rail or battery-supervised systems.
Availability
ADP3000ARZ-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, single-cell Li-ion power management, and industrial sensor node supply requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ADP3000ARZ-3.3 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.
The ADP3000 product line was designed for micropower, multi-topology DC-DC conversion in battery-critical portable electronics - emphasizing low IQ, topology flexibility, and integrated supervisory features without external complexity.
FAQ
What is the guaranteed output voltage accuracy of the ADP3000ARZ-3.3?
The ADP3000ARZ-3.3 delivers a fixed 3.3 V output with guaranteed accuracy of ±5% (3.135 V to 3.465 V) over temperature (0°C to +70°C) and line/load conditions, achieved via on-chip laser-trimmed resistors - no external feedback components are required or supported.
Can the ADP3000ARZ-3.3 operate in step-down (buck) mode, and what are the input limits?
Yes, the ADP3000ARZ-3.3 supports step-down operation with input voltage range of 2 V to 30 V. In buck mode, it delivers up to 100 mA at 3 V from a 5 V input, using SW1 connected to VIN and SW2 driving the inductor - full functionality is retained without external mode-select pins.
How is current limiting configured on the ADP3000ARZ-3.3, and what is the default setting?
Current limiting is set by connecting a resistor between ILIM and VIN: a 220 Ω resistor yields 400 mA limit. If ILIM is tied directly to VIN, the internal limit defaults to 1.5 A. The circuit uses a 0.5% sense transistor ratio and 80 Ω internal resistor - accuracy degrades below 0.3 µs switch-on time.
Does the ADP3000ARZ-3.3 require external compensation components for loop stability?
No, the ADP3000ARZ-3.3 uses comparator hysteresis (12.5 mV) to ensure inherent loop stability - no external compensation capacitors or resistors are needed. This simplifies design and improves reliability across temperature and load variations.
What package type is used for the ADP3000ARZ-3.3, and is it RoHS-compliant?
The ADP3000ARZ-3.3 is supplied in an 8-lead SOIC (R-8) package per JEDEC MS-012AA, measuring 4.90 mm × 3.90 mm × 1.75 mm. It is RoHS-compliant and lead-free, with moisture sensitivity level (MSL) 1 - no bake requirement prior to reflow soldering.
ADP3000ARZ-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
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- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
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ADP3000ARZ-3.3 FAQ
1.How can I place an order for ADP3000ARZ-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3000ARZ-3.3 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 ADP3000ARZ-3.3 reliable?
The price and inventory of ADP3000ARZ-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3000ARZ-3.3 is usually 5 days.
3.What payment methods are accepted for ADP3000ARZ-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3000ARZ-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3000ARZ-3.3?
ADP3000ARZ-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3000ARZ-3.3 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 ADP3000ARZ-3.3?
For technical support, including ADP3000ARZ-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3000ARZ-3.3 requirements.
6.How does Aetrix verify that ADP3000ARZ-3.3 is sourced from the original manufacturer or authorized distributors?
All ADP3000ARZ-3.3 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 ADP3000ARZ-3.3 meets industry standards.
7.What is the process for return or replacement of ADP3000ARZ-3.3?
All ADP3000ARZ-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3000ARZ-3.3, 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 ADP3000ARZ-3.3 part is unused and in its original packaging.
Return procedure for ADP3000ARZ-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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