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Analog Devices Inc. ADP3603AR-REEL
- Part No.:
- ADP3603AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3603AR-REEL.pdf
- Description:
- IC REG BUCK -3V 50MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
ADP3603AR-REEL from Analog Devices is a fully regulated switched-capacitor voltage inverter IC that generates a precise –3.0 V output from a +4.5 V to +6.0 V input, delivering up to 50 mA with ±3% output accuracy and 120 kHz switching frequency. It operates without an inductor and is used in portable instruments and battery-powered devices requiring compact negative rail generation.
For engineers reviewing the ADP3603AR-REEL datasheet, ADP3603AR-REEL pinout, ADP3603AR-REEL application, or ADP3603AR-REEL equivalent, key selection criteria include regulated negative output capability, shutdown control timing (<5 ms), SOIC-8 package compatibility, low quiescent current (2.4–3.0 mA), and charge-pump capacitor ESR sensitivity for ripple control.
Technical Context
The ADP3603AR-REEL uses a two-phase charge-pump topology with internal 240 kHz oscillator driving complementary MOSFET switches (S1–S4) to invert and regulate voltage. Regulation is achieved via feedback-controlled ON-resistance of S3, referenced to VSENSE for improved load regulation.
It implements fast logic-level shutdown (VIH ≥ 2.4 V, VIL ≤ 0.4 V), delivers 50 mA output with <0.9 mV/mA load regulation, and maintains stable operation across –40°C to +85°C using low-ESR ceramic or tantalum capacitors (C1–C3 = 10 µF typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | –3.0 V (regulated, ±3% over 10–50 mA, 4.5–6.0 V VIN) |
| Output Current | 50 mA max continuous; supports transient loads up to 60 mA |
| Switching Frequency | 120 kHz (enables use of small 10 µF ceramic pump/output caps) |
| Input Voltage Range | +4.5 V to +6.0 V (absolute max +7.5 V) |
| Shutdown Quiescent Current | 1.4–2.5 mA (reduces system standby power significantly) |
| Load Regulation | 0.9 mV/mA (ensures stable output under dynamic load changes) |
| Output Ripple | 25 mV p-p @ 50 mA with 10 µF/0.15 Ω ESR output cap |
| Operating Temp | –40°C to +85°C (fully specified and guaranteed) |
Pinout & Package
ADP3603AR-REEL is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package (SO-8), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CP+ | Pump capacitor positive terminal; connects to C2 anode during charging phase |
| 2 | GND | Power and signal reference ground; must be single-point connected to input/output caps |
| 3 | CP– | Pump capacitor negative terminal; connects to C2 cathode during inversion phase |
| 4 | SHUTDOWN | Active-high logic control: high = shutdown (oscillator off), low = normal operation |
| 5 | VSENSE | Remote output voltage sense; improves load regulation by compensating PCB trace IR drop |
| 6 | NC | No internal connection; must remain unconnected |
| 7 | VOUT | Regulated negative output (–3.0 V); requires low-ESR capacitor to GND |
| 8 | VIN | Positive input supply (4.5–6.0 V); requires local low-ESR bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Fully regulated negative output | –3.0 V with ±3% accuracy over full temp/load range-eliminates need for post-regulation LDO |
| Inductorless charge-pump architecture | Reduces BOM count and board area vs. inductive DC/DC inverters; enables ultra-thin designs |
| Fast enable/disable timing | <5 ms turn-on/off ensures responsive power sequencing in portable systems |
| VSENSE remote sensing | Compensates for up to ~100 mΩ PCB trace resistance, maintaining regulation at point-of-load |
| Low-noise SOIC-8 layout support | Pinout optimized for minimal loop area; supports <30 mV ripple with proper MLCC placement |
Applications
| Portable Medical Sensors | Battery-Powered Oscilloscopes |
|---|---|
Use Scenario: Handheld ECG front-end requiring clean –3.0 V bias for op-amp rails and ADC reference. IC Role / Device Role / Timing Role: Negative voltage regulator providing isolated, low-ripple supply for analog signal chain. Use Value: Enables single-cell Li-ion (3.0–4.2 V) operation while maintaining ±3% output accuracy and <30 mV ripple at 25 mA load. |
Use Scenario: Compact digital storage oscilloscope with dual-rail analog front-end powered from 5 V USB supply. IC Role / Device Role / Timing Role: High-frequency charge-pump inverter generating stable –3.0 V for active probes and signal conditioning. Use Value: Delivers 50 mA with 120 kHz switching-minimizing EMI interference with sampling clock and enabling filter-free layout. |
| Wireless Sensor Node RF IC Bias | Industrial PLC I/O Module |
Use Scenario: Sub-GHz transceiver module in smart meter needing –3.0 V for LNA and mixer bias under intermittent duty cycle. IC Role / Device Role / Timing Role: Shutdown-controlled negative rail generator synchronized with radio transmit bursts. Use Value: Reduces standby current to 1.4 mA during sleep mode while enabling <5 ms wake-up to full output regulation. |
Use Scenario: DIN-rail mounted PLC analog input card requiring isolated –3.0 V for precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Regulated negative supply source referenced to system ground with remote VSENSE compensation. Use Value: Maintains <0.9 mV/mA load regulation across long PCB traces between ADP3603AR-REEL and remote op-amp stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP3604AR-REEL | Higher output current (120 mA), same SOIC-8 package and pinout; otherwise identical regulation, shutdown, and frequency specs | Required when load exceeds 50 mA but design must retain same footprint and control interface | Select ADP3604AR-REEL only if sustained >50 mA output is needed; no change to external components required |
| MAX680ESA+ | Unregulated –2×VIN output (e.g., –10 V @ 5 V IN); no feedback loop, no VSENSE, no shutdown pin; 100 kHz switching | Suitable only for non-critical bias rails where output tolerance >±10% is acceptable | Choose MAX680ESA+ only for cost-sensitive, low-precision applications where regulation and shutdown are unnecessary |
Compared with ADP3603AR-REEL, ADP3604AR-REEL offers higher current headroom within identical form-factor and control logic, while MAX680ESA+ trades regulation and features for lower cost and simpler external component count-making it unsuitable for precision analog biasing.
Availability
ADP3603AR-REEL is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered test equipment, and industrial I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADP3603AR-REEL 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The ADP360x family was designed specifically for compact, inductorless negative voltage generation in space-constrained portable and battery-operated systems-emphasizing regulation accuracy, low quiescent power, and robust ESD tolerance (4 kV HBM).
FAQ
What is the maximum output current specification for ADP3603AR-REEL?
The ADP3603AR-REEL is rated for up to 50 mA of continuous output current with ±3% regulation accuracy across temperature and line conditions. It can sustain short-term loads up to 60 mA, but output voltage deviation increases beyond this point. For higher current needs, Analog Devices specifies the pin-compatible ADP3604AR-REEL (120 mA). The ADP3603AR-REEL's internal switch resistance and thermal limits constrain its safe operating area to 50 mA under worst-case conditions (e.g., VIN = 4.5 V, TA = +85°C).
Does ADP3603AR-REEL require external inductors?
No, the ADP3603AR-REEL uses a switched-capacitor (charge-pump) architecture and operates entirely without inductors. It relies on two external capacitors: a pump capacitor (CP+, CP– pins) and an output capacitor (VOUT to GND). This eliminates magnetic components, reduces EMI, and simplifies PCB layout-making ADP3603AR-REEL ideal for ultra-thin and noise-sensitive applications like portable instrumentation.
How does the VSENSE pin improve regulation in ADP3603AR-REEL?
The VSENSE pin on ADP3603AR-REEL enables remote output voltage sensing, allowing the feedback loop to monitor voltage directly at the load rather than at the VOUT pin. This compensates for IR drop across PCB traces, improving load regulation by up to 50% compared to local sensing. For optimal performance, connect VSENSE to the load-side of the output capacitor with a short, noise-shielded trace-and tie it to VOUT only if trace resistance is negligible (<10 mΩ).
What is the shutdown behavior of ADP3603AR-REEL?
ADP3603AR-REEL enters shutdown mode when the SHUTDOWN pin (Pin 4) is pulled to VIN (≥2.4 V), disabling the internal oscillator and turning off all switching elements. Quiescent current drops to 1.4–2.5 mA, and VOUT decays passively. Turn-off time is <5 ms. To enable, drive SHUTDOWN low (≤0.4 V). If unused, SHUTDOWN must be tied to GND-floating this pin may cause erratic operation. This behavior is fully characterized and guaranteed across –40°C to +85°C.
Can ADP3603AR-REEL generate output voltages other than –3.0 V?
The ADP3603AR-REEL is factory-trimmed for a nominal –3.0 V regulated output and does not support programmable or adjustable outputs via external resistors. However, unregulated outputs ranging from –3.0 V to –VIN can be achieved by grounding VSENSE (Pin 5), with magnitude inversely proportional to load current. For custom regulated voltages (e.g., –1.2 V or –4.0 V), contact Analog Devices directly-these variants exist but are not orderable as ADP3603AR-REEL.
ADP3603AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Negative
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- -3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50mA
- Frequency - Switching:
- 120kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP3603AR-REEL FAQ
1.How can I place an order for ADP3603AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3603AR-REEL 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 ADP3603AR-REEL reliable?
The price and inventory of ADP3603AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3603AR-REEL is usually 5 days.
3.What payment methods are accepted for ADP3603AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3603AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3603AR-REEL?
ADP3603AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3603AR-REEL 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 ADP3603AR-REEL?
For technical support, including ADP3603AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3603AR-REEL requirements.
6.How does Aetrix verify that ADP3603AR-REEL is sourced from the original manufacturer or authorized distributors?
All ADP3603AR-REEL 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 ADP3603AR-REEL meets industry standards.
7.What is the process for return or replacement of ADP3603AR-REEL?
All ADP3603AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3603AR-REEL, 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 ADP3603AR-REEL part is unused and in its original packaging.
Return procedure for ADP3603AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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