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Analog Devices Inc. ADP3605ARU-3-REEL
- Part No.:
- ADP3605ARU-3-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADP3605ARU-3-REEL.pdf
- Description:
- IC SW CAP/INV -3V .12A 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,636
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Product details
Overview
ADP3605ARU-3-REEL from Analog Devices is a regulated switched-capacitor voltage inverter IC that generates a stable negative output from a 3 V to 6 V positive input. It delivers up to 120 mA output current with ±3% regulation accuracy, operates at 250 kHz switching frequency, and requires no inductor-enabling compact, low-EMI power conversion in space-constrained portable systems.
For engineers reviewing the ADP3605ARU-3-REEL datasheet, ADP3605ARU-3-REEL pinout, ADP3605ARU-3-REEL application, or ADP3605ARU-3-REEL equivalent, key selection criteria include its adjustable −3 V to −6 V regulated output range, 2 µA shutdown current, 8-lead SOIC package compatibility, and absence of magnetic components for EMI-sensitive battery-powered designs.
Technical Context
The ADP3605ARU-3-REEL implements a two-phase charge-pump topology driven by an internal 500 kHz oscillator, producing a 250 kHz effective switching frequency. Its feedback loop monitors VOUT via the VSENSE pin and adjusts duty cycle to maintain regulation across load and input variations.
It uses external resistive programming between VSENSE and VOUT to set output voltage (e.g., −3.0 V with 19 kΩ), while internal precision-trimmed resistors eliminate need for external divider trimming. Shutdown control is TTL/CMOS-compatible and reduces quiescent current to 2 µA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 120 mA max - supports moderate-power analog rails or dual-supply peripherals without external boost stages. |
| Output Regulation Accuracy | ±3% - ensures stable biasing for op-amps, ADC references, or RF front-end circuitry under varying load. |
| Switching Frequency | 250 kHz nominal - enables use of small 4.7 µF ceramic or tantalum pump/output capacitors; reduces size vs. lower-frequency charge pumps. |
| Input Voltage Range | 3 V to 6 V - compatible with single-cell Li-ion (3.0–4.2 V), 3.3 V logic rails, and 5 V USB-powered systems. |
| Shutdown Current | 2 µA typical - extends battery life in standby mode for pagers, radio receivers, and portable instruments. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and consumer-grade embedded applications without derating. |
| Package | 8-Lead SOIC_N (R-8) - standard surface-mount footprint with 1.27 mm pitch; compatible with automated assembly and reflow. |
Pinout & Package
ADP3605ARU-3-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CP+) | Pump capacitor positive terminal | Connects to positive plate of external charge-pump capacitor; carries bidirectional high-current switching pulses. |
| 2 (GND) | Device ground reference | Single-point ground for VIN, VOUT, CP+, and CP−; critical for ripple suppression and stability. |
| 3 (CP−) | Pump capacitor negative terminal | Connects to negative plate of external charge-pump capacitor; completes charge-transfer path during inversion phase. |
| 4 (SD) | Logic shutdown control input | Active-high TTL/CMOS input; pulls high to disable oscillator and reduce supply current to 2 µA. |
| 5 (VSENSE) | Regulated output voltage sense | Feedback node for internal error amplifier; sets output via resistor to VOUT (e.g., 19 kΩ for −3.0 V). |
| 6 (NC) | No connect | Internally unconnected; must remain floating-no routing or soldering permitted. |
| 7 (VOUT) | Regulated negative output | Delivers −3 V to −6 V (programmable); requires ≥4.7 µF low-ESR capacitor to ground for ripple control. |
| 8 (VIN) | Positive input supply | Accepts 3–6 V DC; requires local 1 µF low-ESR bypass capacitor to suppress switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components, reducing EMI, board area, and BOM cost versus inductive DC/DC inverters. |
| Adjustable regulated output | Programmable −3 V to −6 V via single external resistor; no trim pot or second resistor required due to internal precision divider. |
| Low-noise 250 kHz operation | Higher frequency than legacy charge pumps enables smaller capacitors and avoids audible noise in audio-sensitive applications. |
| Integrated shutdown control | TTL/CMOS-compatible SD pin allows seamless integration into system power sequencing without external logic. |
| Robust thermal performance | 660 mW max power dissipation in SOIC package supports full 120 mA load at 6 V input without forced cooling. |
Applications
| Portable Instrument Power Rails | Battery-Powered Radio Receivers |
|---|---|
|
Use Scenario: Handheld multimeters and portable oscilloscopes require clean ±3.3 V or ±5 V analog rails from a single Li-ion cell. IC Role / Device Role / Timing Role: ADP3605ARU-3-REEL generates regulated −3.0 V rail to complement onboard LDO's +3.3 V output. Use Value: Delivers 120 mA with <75 mV ripple at full load, enabling accurate ADC reference and op-amp biasing without inductor-induced noise. |
Use Scenario: AM/FM radio receiver modules in remote controls or IoT sensors operate from coin cells or alkaline batteries. IC Role / Device Role / Timing Role: ADP3605ARU-3-REEL supplies −3.0 V local bias to RF mixer and IF amplifier stages. Use Value: 2 µA shutdown current extends shelf life; ±3% regulation maintains signal-to-noise ratio across battery discharge curve. |
| Dual-Supply Disk Drive Interfaces | Mobile Phone Peripheral Cards |
|
Use Scenario: Compact 2.5″ HDD controller boards need isolated ±5 V rails for motor driver and analog front-end. IC Role / Device Role / Timing Role: ADP3605ARU-3-REEL provides regulated −5 V (via 16.5 kΩ RSET) alongside +5 V DC/DC converter. Use Value: 250 kHz switching avoids interference with servo control loops; SOIC package fits tight layout constraints near SATA connectors. |
Use Scenario: SDIO-based camera or GPS add-on cards in smartphones require −3.3 V for interface level-shifting and sensor biasing. IC Role / Device Role / Timing Role: ADP3605ARU-3-REEL serves as compact, low-EMI negative rail generator on card-edge PCBs. Use Value: No inductor simplifies FCC/CE compliance; 8-lead SOIC matches standard pick-and-place tooling for high-volume card assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge-pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed −5 V output; 100 mA max; 10 kHz switching; requires larger capacitors. | Limited to fixed-rail systems; unsuitable for adjustable or low-ripple applications. | Choose only if −5 V is mandatory and size/EMI are secondary concerns. |
| TPS60403DBVR | 150 mA output; ±1.5% accuracy; 500 kHz switching; integrated soft-start. | Higher accuracy and frequency but lacks shutdown pin and requires different feedback configuration. | Select when tighter regulation (<±1.5%) and faster transient response are critical; verify PCB layout for higher-frequency noise. |
Compared with MAX680ESA+ and TPS60403DBVR, the ADP3605ARU-3-REEL uniquely balances programmable output, 2 µA shutdown, and SOIC compatibility-making it optimal for battery-powered systems needing flexible, low-quiescent, inductor-free negative rails.
Availability
ADP3605ARU-3-REEL is available at Aetrix Electronics and suitable for portable instruments, battery-powered radio receivers, and mobile phone peripheral cards requiring stable component supply, RoHS-compliant packaging, and consistent reel-based delivery for SMT production.
Supply support for ADP3605ARU-3-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADP3605ARU-3-REEL belongs to Analog Devices' regulated charge-pump inverter family, designed specifically for compact, low-EMI negative voltage generation in battery-operated and space-constrained electronic systems.
FAQ
What output voltage range does the ADP3605ARU-3-REEL support?
The ADP3605ARU-3-REEL supports an adjustable regulated output voltage from −3 V to −6 V, set by a single external resistor between the VSENSE and VOUT pins. For example, a 19 kΩ resistor yields −3.0 V, while a 29 kΩ resistor sets −3.5 V. The device maintains ±3% accuracy across temperature and load, and its internal precision-trimmed feedback network eliminates need for external trimming or dual-resistor dividers.
Does the ADP3605ARU-3-REEL require an inductor?
No, the ADP3605ARU-3-REEL is an inductorless switched-capacitor voltage inverter. It uses an internal 2-phase charge-pump circuit with external pump (CP) and output (CO) capacitors-typically 4.7 µF low-ESR ceramic or tantalum types-to generate regulated negative voltage. This eliminates magnetic components, reducing EMI, board area, and cost compared to inductive DC/DC inverters.
How does the shutdown function work on the ADP3605ARU-3-REEL?
The ADP3605ARU-3-REEL features a TTL/CMOS-compatible shutdown (SD) pin (Pin 4). Applying a logic high (≥2.4 V) disables the internal oscillator and reduces quiescent current to 2 µA typical. A logic low (≤0.4 V) or connection to GND enables normal operation. If unused, SD must be tied to GND-floating is not allowed. This enables precise system-level power gating in battery-sensitive applications.
What is the maximum output current capability of the ADP3605ARU-3-REEL?
The ADP3605ARU-3-REEL delivers up to 120 mA of continuous regulated output current at −3 V to −6 V, with output ripple held to ≤75 mV at full load (120 mA) using 4.7 µF output capacitance. Performance depends on input voltage (3–6 V), capacitor ESR, and thermal conditions; full 120 mA is sustainable in SOIC package at +85°C ambient with proper PCB copper area for heat dissipation.
Which package type is used for the ADP3605ARU-3-REEL?
The ADP3605ARU-3-REEL uses an 8-lead Standard Small Outline Package (SOIC_N), also designated R-8 per JEDEC MS-012-AA. It measures 5.00 mm × 4.00 mm with 1.27 mm lead pitch and has a thermal resistance θJA of 150°C/W. This RoHS-compliant, tape-and-reel packaged variant is optimized for automated SMT assembly and meets IPC/JEDEC standards for reflow compatibility.
ADP3605ARU-3-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
ADP3605ARU-3-REEL FAQ
1.How can I place an order for ADP3605ARU-3-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3605ARU-3-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 ADP3605ARU-3-REEL reliable?
The price and inventory of ADP3605ARU-3-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3605ARU-3-REEL is usually 5 days.
3.What payment methods are accepted for ADP3605ARU-3-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3605ARU-3-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3605ARU-3-REEL?
ADP3605ARU-3-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3605ARU-3-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 ADP3605ARU-3-REEL?
For technical support, including ADP3605ARU-3-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3605ARU-3-REEL requirements.
6.How does Aetrix verify that ADP3605ARU-3-REEL is sourced from the original manufacturer or authorized distributors?
All ADP3605ARU-3-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 ADP3605ARU-3-REEL meets industry standards.
7.What is the process for return or replacement of ADP3605ARU-3-REEL?
All ADP3605ARU-3-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3605ARU-3-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 ADP3605ARU-3-REEL part is unused and in its original packaging.
Return procedure for ADP3605ARU-3-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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