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Analog Devices Inc. ADP1109AAR
- Part No.:
- ADP1109AAR
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AAR.pdf
- Description:
- IC REG BOOST ADJ 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,436
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Product details
Overview
ADP1109AAR from Analog Devices is a micropower step-up DC-to-DC converter in SO-8 package, delivering fixed 3.3 V output from 2 V–3 V input with 120 kHz oscillator frequency, 460 µA quiescent current, and integrated power switch. It enables compact flash memory VPP generation and low-voltage battery-powered boost conversion in portable instrumentation.
For engineers reviewing the ADP1109AAR datasheet, ADP1109AAR pinout, ADP1109AAR application, or ADP1109AAR equivalent, key selection criteria include input voltage range (2 V–9 V), output voltage tolerance (±5%), shutdown logic compatibility (VIH = 2.0 V, VIL = 0.8 V), and SO-8 thermal performance for handheld device integration.
Technical Context
The ADP1109AAR implements a gated-oscillator architecture with internal 1.25 V reference and comparator hysteresis (8–12.5 mV) to ensure loop stability without external compensation. Its oscillator operates at 120 kHz (±25 kHz) across temperature, enabling use of small surface-mount inductors (e.g., 33 µH) and minimizing EMI.
It integrates an NPN power switch with saturation voltage ≤0.8 V at 500 mA and supports logic-controlled shutdown that maintains 460 µA quiescent current when disabled. The FB/SENSE pin connects internally to laser-trimmed resistors for fixed 3.3 V regulation, eliminating external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±5% (guaranteed 3.13–3.47 V over 2–3 V input) |
| Oscillator Frequency | 120 kHz (enables compact 10–47 µH inductor selection) |
| Quiescent Current | 460 µA (supports >1000-hour battery life in 100 µA-load standby systems) |
| Input Voltage Range | 2 V to 9 V (compatible with single-cell Li-ion, NiMH, and alkaline sources) |
| Switch Saturation Voltage | ≤0.8 V at 500 mA (limits conduction loss to <400 mW at full load) |
| Shutdown Threshold | VIL ≤ 0.8 V / VIH ≥ 2.0 V (direct interface with 3.3 V CMOS logic) |
| Operating Temperature | 0°C to +70°C (validated for consumer and industrial portable equipment) |
Pinout & Package
ADP1109AAR is housed in an 8-lead SOIC (SO-8) package with standard 1.27 mm pitch, 5.0 mm × 6.2 mm footprint, and exposed pad not present. Pin 2 and Pin 6 are no-connect (NC); functional pins are VIN, SW, PGND, GND, SHUTDOWN, and FB/SENSE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–9 V unregulated source; must be decoupled with ≥10 µF ceramic capacitor near pin |
| SW (Pin 3) | Collector node of internal NPN switch | Drives external inductor; voltage swings up to 50 V; requires Schottky catch diode (e.g., MBRS130T3) |
| PGND (Pin 4) | Power ground return path | Separate from signal GND to minimize noise coupling into feedback loop |
| GND (Pin 5) | Signal ground reference | Reference for internal comparator and reference; ties to system ground plane |
| SHUTDOWN (Pin 7) | Logic enable/disable control | Active-low: <0.8 V disables oscillator; >2.0 V enables operation; draws ≤20 µA |
| FB/SENSE (Pin 8) | Feedback input for output regulation | Internally connected to laser-trimmed resistor network for fixed 3.3 V; connect directly to VOUT |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 460 µA quiescent current enables multi-year battery life in low-duty-cycle devices |
| Fixed-output configuration | Laser-trimmed internal resistors eliminate external feedback network, reducing BOM count by 2 parts |
| Gated-oscillator control | Eliminates need for external frequency compensation components and simplifies layout |
| Logic-compatible shutdown | Direct interface with 3.3 V microcontrollers without level-shifting circuitry |
| SO-8 thermal profile | 300 mW max power dissipation supports continuous 60 mA output at 3.3 V in ambient ≤60°C |
Applications
| Flash Memory VPP Generation | Single-Cell to 3.3 V Boost |
|---|---|
Use Scenario: Generating +12 V programming voltage for NOR/NAND flash memory in handheld inventory scanners powered by 2 V–3.3 V batteries. IC Role / Device Role / Timing Role: Step-up DC-DC converter providing regulated high-voltage rail during flash write/erase cycles. Use Value: Enables reliable flash programming using only one 2 V alkaline cell, with <35 mV output ripple ensuring stable VPP timing margins. | Use Scenario: Powering 3.3 V microcontrollers and sensors from a single NiMH cell (1.2 V nominal) in portable medical monitors. IC Role / Device Role / Timing Role: Primary voltage booster supplying clean, regulated 3.3 V to digital subsystems. Use Value: Delivers 100 mA at 3.3 V from 2.0 V input with 460 µA quiescent current, extending runtime between charges. |
| Laptop Subsystem Supply | Portable Instrumentation Rail |
Use Scenario: Providing isolated 3.3 V bias for USB transceivers or display drivers in clamshell-form-factor laptops with constrained board space. IC Role / Device Role / Timing Role: Compact, low-noise boost converter operating from main 5 V rail or battery backup path. Use Value: SO-8 footprint and 120 kHz switching allow use of 33 µH shielded inductor, minimizing EMI near sensitive analog circuits. | Use Scenario: Supplying 3.3 V to precision ADCs and op-amps in handheld multimeters powered by two AA cells. IC Role / Device Role / Timing Role: Main analog/digital supply regulator with tight output tolerance and low ground current. Use Value: ±5% output accuracy and 12.5 mV comparator hysteresis ensure stable regulation under varying load and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2.5 MHz switching frequency; 95% efficiency at 100 mA; requires external feedback resistors | Supports smaller inductors (1 µH) but needs additional resistors and has higher minimum input (1.8 V) | Preferred for space-constrained designs needing >90% efficiency; not drop-in due to different pinout and feedback requirement |
| MAX680ESA+ | Charge-pump topology (no inductor); fixed ±10 V dual output; 100 µA quiescent current | Delivers dual-rail outputs but limited to 20 mA per rail and cannot achieve 3.3 V single-ended output | Only suitable where inductor-free design and dual polarity are required; incompatible for 3.3 V boost applications |
Compared with TPS61022DRVR and MAX680ESA+, the ADP1109AAR provides fixed 3.3 V output with zero external feedback components and proven 120 kHz inductor-based operation-making it optimal for cost-sensitive, low-noise, and layout-simple portable systems where moderate efficiency suffices.
Availability
ADP1109AAR is available at Aetrix Electronics and suitable for flash memory VPP generation, single-cell boost conversion, and portable instrumentation requiring stable component supply with SO-8 packaging and long-lifecycle support.
Supply support for ADP1109AAR 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing ICs for precision engineering applications.
The ADP1109AAR belongs to Analog Devices' micropower DC-DC converter product line, designed specifically for battery-operated portable electronics requiring minimal external components and ultra-low quiescent current.
FAQ
What is the maximum output current capability of the ADP1109AAR at 3.3 V?
The ADP1109AAR delivers up to 100 mA at 3.3 V output when supplied from a 3 V input, as verified in typical application circuits. Output current is limited by internal switch saturation voltage (≤0.8 V at 500 mA) and thermal constraints of the SO-8 package, with derating required above +60°C ambient. For sustained 100 mA operation, proper PCB copper area and airflow are recommended.
Does the ADP1109AAR require external feedback resistors to set its 3.3 V output?
No, the ADP1109AAR does not require external feedback resistors. It integrates laser-trimmed internal resistors to fix the output at 3.3 V. The FB/SENSE pin (Pin 8) connects directly to the output voltage node, eliminating the need for R1/R2 networks-reducing BOM count and layout complexity compared to adjustable versions like ADP1109AAN.
Can the ADP1109AAR operate from a single 1.5 V alkaline cell?
No, the ADP1109AAR cannot operate from a single 1.5 V alkaline cell. Its absolute minimum input voltage is 2 V, as specified in the Absolute Maximum Ratings and validated across temperature. Below 2 V, the internal reference and comparator fail to function reliably. For 1.5 V input, consider the ADP1613 or similar sub-2 V boost converters.
What is the purpose of separating PGND and GND pins on the ADP1109AAR?
The ADP1109AAR separates PGND (Pin 4) and GND (Pin 5) to isolate high-current power return paths from sensitive analog reference and feedback circuitry. PGND carries pulsed switch current (up to 1.2 A peak), while GND serves as the quiet reference for the 1.25 V bandgap and comparator inputs. This separation minimizes noise coupling and ensures stable regulation, especially under dynamic load conditions.
Is the ADP1109AAR pin-compatible with other variants like ADP1109AAR-5 or ADP1109AAR-12?
Yes, the ADP1109AAR is pin-compatible with ADP1109AAR-5 and ADP1109AAR-12. All share identical SO-8 pinout, electrical interface, and thermal characteristics. The only difference is the internal laser-trimmed resistor network setting the output voltage-3.3 V, 5 V, or 12 V respectively. No PCB changes are required when substituting between these fixed-output variants.
ADP1109AAR 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-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 9V
- Current - Output:
- 1.2A (Switch)
- Frequency - Switching:
- 120kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1109AAR FAQ
1.How can I place an order for ADP1109AAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AAR 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 ADP1109AAR reliable?
The price and inventory of ADP1109AAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AAR is usually 5 days.
3.What payment methods are accepted for ADP1109AAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AAR?
ADP1109AAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AAR 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 ADP1109AAR?
For technical support, including ADP1109AAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AAR requirements.
6.How does Aetrix verify that ADP1109AAR is sourced from the original manufacturer or authorized distributors?
All ADP1109AAR 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 ADP1109AAR meets industry standards.
7.What is the process for return or replacement of ADP1109AAR?
All ADP1109AAR units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AAR, 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 ADP1109AAR part is unused and in its original packaging.
Return procedure for ADP1109AAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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