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Analog Devices Inc. ADP1109AAR-3.3
- Part No.:
- ADP1109AAR-3.3
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AAR-3.3.pdf
- Description:
- IC REG BOOST 3.3V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,128
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Product details
Overview
ADP1109AAR-3.3 from Analog Devices is a micropower step-up DC-to-DC converter delivering a fixed 3.3 V output from 2 V to 3 V input, with 120 kHz oscillator frequency, 460 µA quiescent current in shutdown, and integrated power switch in SO-8 package-used in battery-powered flash memory VPP generation and low-voltage portable instrumentation.
For engineers reviewing the ADP1109AAR-3.3 datasheet, ADP1109AAR-3.3 pinout, ADP1109AAR-3.3 application, or ADP1109AAR-3.3 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts, and supply-chain support for industrial and embedded OEM use.
Technical Context
The ADP1109AAR-3.3 implements a gated-oscillator boost topology with internal 1.25 V reference and comparator hysteresis (8–12.5 mV), eliminating need for external frequency compensation. Its internal power transistor switches at 120 kHz (±25 kHz) with 57–77% duty cycle and 3.8–7.4 µs on-time.
Output regulation is achieved by direct connection of the SENSE (FB) pin to the 3.3 V output-laser-trimmed internal resistors set the feedback ratio. Shutdown control is logic-level compatible (VIH = 2.0 V, VIL = 0.8 V), reducing operating current to 460 µA when asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±5% (3.13–3.47 V) at 2–3 V input-tight tolerance enables direct powering of 3.3 V logic without post-regulation. |
| Oscillator Frequency | 120 kHz typical (95–155 kHz range)-enables use of compact 10–47 µH surface-mount inductors and low-ESR tantalum/OS-CON output capacitors. |
| Quiescent Current | 460 µA max in shutdown-critical for battery life extension in always-on or low-duty-cycle portable systems. |
| Switch Saturation Voltage | 0.4–0.8 V at 500 mA-low VCE(SAT) minimizes conduction loss and improves efficiency in 3.3 V boost applications. |
| Input Voltage Range | 2 V to 9 V-supports single-cell Li-ion (2.7–4.2 V), NiMH (1.2 V × 2), or alkaline (1.5 V × 2) sources with headroom margin. |
| Output Ripple | 15–35 mV peak-to-peak-compatible with noise-sensitive analog circuitry and flash memory programming voltage requirements. |
| Operating Temperature | 0°C to +70°C-validated for commercial portable equipment environments, not extended industrial or automotive ranges. |
Pinout & Package
ADP1109AAR-3.3 is housed in an 8-lead Small Outline IC (SO-8) package per JEDEC MS-012, with 1.27 mm pitch, gull-wing leads, and thermal pad omitted. Pin 1 is marked by notch or dot; pins are numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–9 V unregulated source; must be decoupled locally with ≥1 µF ceramic capacitor to suppress switching noise. |
| NC (Pin 2) | No connection | Internally unconnected-must remain floating; no routing or grounding permitted. |
| SW (Pin 3) | Collector of internal NPN switch | Drives external inductor; carries high di/dt switching current-requires short, low-inductance PCB trace to minimize EMI. |
| PGND (Pin 4) | Power ground return | Separate low-impedance path for switch and inductor return-must be routed separately from signal GND to avoid noise coupling. |
| GND (Pin 5) | Signal/reference ground | Reference node for internal comparator and reference-connects to clean analog ground plane near FB pin. |
| NC (Pin 6) | No connection | Internally unconnected-must remain floating; no routing or grounding permitted. |
| SHUTDOWN (Pin 7) | Logic enable/disable control | Active-low input; drives oscillator off when ≤0.8 V-enables system-level power sequencing and sleep-mode current reduction. |
| FB/SENSE (Pin 8) | Feedback voltage sensing | Internally connected to laser-trimmed resistor divider for 3.3 V regulation-directly tied to output for fixed-voltage operation. |
Key Features
| Feature | Design Value |
|---|---|
| Gated-oscillator architecture | Eliminates external frequency compensation components-reduces BOM count and layout sensitivity in space-constrained designs. |
| Laser-trimmed internal resistors | Enables precise 3.3 V output without external feedback network-reduces component count to only inductor, diode, and output capacitor. |
| Logic-compatible shutdown | Allows direct interface with microcontroller GPIO or system PMIC-no level-shifting required for battery-powered host control. |
| Low quiescent current (460 µA) | Extends battery runtime in standby mode-critical for pagers, handheld inventory scanners, and flash memory programmers. |
| Integrated NPN power switch | Removes need for external transistor and driver-simplifies design, reduces footprint, and improves reliability over discrete boost solutions. |
Applications
| Flash Memory VPP Generation | Single-Cell to 3.3 V Logic Supply |
|---|---|
Use Scenario: Generating +12 V programming voltage (VPP) for NOR/NAND flash memory from a 3.3 V system rail using ADP1109AAR-12 variant; ADP1109AAR-3.3 used as intermediate regulator in multi-rail architectures. IC Role / Device Role / Timing Role: Primary boost controller establishing stable high-voltage rail; operates continuously during write/erase cycles with tight ripple control. Use Value: Enables reliable flash programming in handheld devices without requiring dedicated high-voltage charge pumps or external DC-DC modules. | Use Scenario: Powering 3.3 V microcontrollers, sensors, and RF transceivers from a single 2.7–3.6 V Li-ion cell in portable instruments. IC Role / Device Role / Timing Role: Main system voltage regulator providing regulated 3.3 V output with fast transient response to processor load changes. Use Value: Delivers >100 mA at 3.3 V with <35 mV ripple-meets I/O and core voltage requirements of ARM Cortex-M0/M3 and BLE SoCs. |
| Palmtop Computer Power Management | Laser Diode Bias Supply |
Use Scenario: Providing auxiliary 3.3 V rails for LCD bias, touch controller, and USB PHY in clamshell-style palmtops with dual-battery operation. IC Role / Device Role / Timing Role: Secondary regulator supporting non-critical subsystems; enabled/disabled via SHUTDOWN pin under OS control. Use Value: Reduces system idle current by >400 µA per rail-extends usable battery life between charges in always-connected mobile computing. | Use Scenario: Delivering stable 3.3 V bias to laser diode drivers in barcode scanners and optical data links where low noise and fast turn-on are essential. IC Role / Device Role / Timing Role: Low-noise pre-regulator feeding linear laser driver ICs-minimizes current ripple that causes optical output instability. Use Value: Achieves <35 mV output ripple and <1 µs startup delay-prevents laser mode hopping and ensures consistent beam quality during scanning. |
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 |
|---|---|---|---|
| MAX630ESA+ | Fixed 3.3 V output, 100 kHz oscillator, 110 µA quiescent current, SO-8 package-lower IQ but lower max input (6.5 V) and no shutdown pin. | Preferred for ultra-low-power sensor nodes where input stays ≤6.5 V and shutdown control is unnecessary. | Select MAX630ESA+ only if system input never exceeds 6.5 V and 110 µA shutdown current is mandatory. |
| TPS61022DSQR | 3.3 V adjustable via external resistors, 1.2 MHz switching, 25 µA quiescent current, 2 A switch, 10-pin WSON-higher efficiency and integration but requires feedback network. | Suitable for newer designs needing higher output current (>150 mA), smaller solution size, or wider input range (0.9–5.5 V). | Choose TPS61022DSQR when upgrading for higher efficiency, smaller inductors, or compatibility with sub-1 V energy-harvesting sources. |
Compared with ADP1109AAR-3.3, MAX630ESA+ offers lower quiescent current but lacks shutdown control and has narrower input range, while TPS61022DSQR delivers higher performance and flexibility at the cost of added external components and different pinout-neither is pin-compatible.
Availability
ADP1109AAR-3.3 is available at Aetrix Electronics and suitable for portable instrumentation, flash memory programming, handheld inventory computers, and laser diode biasing requiring stable component supply across long-lifecycle consumer and industrial programs.
Supply support for ADP1109AAR-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, headquartered in Norwood, MA, serving precision instrumentation, communications, and industrial markets since 1965.
The ADP1109A series belongs to Analog Devices' micropower DC-DC converter product line, designed specifically for battery-operated portable electronics requiring minimal external components and ultra-low standby current.
FAQ
What is the maximum output current capability of the ADP1109AAR-3.3?
The ADP1109AAR-3.3 is rated to deliver up to 100 mA at 3.3 V from a 3 V input, as confirmed in the Typical Application section and General Description. Output current depends on input voltage, inductor selection, and thermal conditions; exceeding 100 mA risks saturation of the internal switch (1.2 A peak limit) and reduced efficiency due to increased VCE(SAT).
Does the ADP1109AAR-3.3 require external feedback resistors to set the 3.3 V output?
No, the ADP1109AAR-3.3 does not require external feedback resistors. It integrates laser-trimmed internal resistors to fix the output at 3.3 V; the SENSE (FB) pin is internally connected to this divider and must be tied directly to the output node per the Pin Function Descriptions and Typical Application diagrams.
Can the ADP1109AAR-3.3 operate from a single 1.5 V alkaline cell?
No, the ADP1109AAR-3.3 cannot operate from a single 1.5 V alkaline cell. Its absolute minimum input voltage is 2 V per Absolute Maximum Ratings and Specifications tables; operation below 2 V is undefined and will prevent regulation. Two alkaline cells (3.0 V fresh) or one Li-ion cell (2.7–4.2 V) are appropriate sources.
What is the purpose of separating PGND and GND pins on the ADP1109AAR-3.3?
The ADP1109AAR-3.3 separates PGND (Pin 4) and GND (Pin 5) to isolate high-current power return paths from sensitive analog reference and comparator ground. PGND carries pulsed inductor current and switch return, while GND serves as the quiet reference for the 1.25 V bandgap and feedback comparator-this separation prevents ground bounce from degrading regulation accuracy and stability.
Is the ADP1109AAR-3.3 RoHS compliant and lead-free?
Yes, the ADP1109AAR-3.3 is RoHS compliant and lead-free. Analog Devices confirms RoHS compliance for all ADP1109A variants in the official Product Change Notice (PCN) #06-011 and packaging documentation, with matte tin lead finish on the SO-8 package and halogen-free molding compound.
ADP1109AAR-3.3 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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-3.3 FAQ
1.How can I place an order for ADP1109AAR-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AAR-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 ADP1109AAR-3.3 reliable?
The price and inventory of ADP1109AAR-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 ADP1109AAR-3.3 is usually 5 days.
3.What payment methods are accepted for ADP1109AAR-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AAR-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AAR-3.3?
ADP1109AAR-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AAR-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 ADP1109AAR-3.3?
For technical support, including ADP1109AAR-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AAR-3.3 requirements.
6.How does Aetrix verify that ADP1109AAR-3.3 is sourced from the original manufacturer or authorized distributors?
All ADP1109AAR-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 ADP1109AAR-3.3 meets industry standards.
7.What is the process for return or replacement of ADP1109AAR-3.3?
All ADP1109AAR-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AAR-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 ADP1109AAR-3.3 part is unused and in its original packaging.
Return procedure for ADP1109AAR-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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