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Analog Devices Inc. ADP1109AAN
- Part No.:
- ADP1109AAN
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1109AAN.pdf
- Description:
- IC REG BOOST ADJ 1.2A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
ADP1109AAN from Analog Devices is a micropower step-up DC-to-DC converter in 8-lead plastic DIP (N-8) package, delivering fixed 3.3 V output with ±5% regulation, 120 kHz oscillator frequency, 460 µA quiescent current in shutdown, and internal power switch rated for 1.2 A peak current. It operates from 2 V to 9 V input and supports logic-controlled shutdown for battery-powered portable instruments.
For engineers reviewing the ADP1109AAN datasheet, ADP1109AAN pinout, ADP1109AAN application, or ADP1109AAN equivalent, key selection criteria include input voltage range (2–9 V), fixed 3.3 V output tolerance (±5%), oscillator frequency stability over temperature, shutdown pin logic thresholds (VIH = 2.0 V, VIL = 0.8 V), and compatibility with low-ESR tantalum or OS-CON output capacitors.
Technical Context
The ADP1109AAN implements a gated-oscillator architecture with an internal 1.25 V reference and comparator-based feedback loop. Its oscillator enables fixed-frequency operation at 120 kHz without external compensation components, while the internal NPN power switch eliminates need for external transistor drive circuitry.
Output voltage is set by laser-trimmed on-chip resistors specific to the -3.3 variant, connecting FB/SENSE directly to VOUT. Shutdown control disables the oscillator via TTL-compatible logic input, maintaining only 460 µA ground current during inactive state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±5% (guaranteed across 2–3 V input range; enables direct replacement of 3.3 V LDOs in space-constrained battery systems) |
| Oscillator Frequency | 120 kHz ±25% (enables use of compact 10–47 µH surface-mount inductors without EMI filtering overhead) |
| Quiescent Current | 460 µA (sets baseline system standby power; critical for >100-hour battery life in pagers and hand-held scanners) |
| Input Voltage Range | 2 V to 9 V (supports single-cell Li-ion (2.7–4.2 V), NiMH (1.2 V × 2), or regulated 5 V rail inputs) |
| Switch Saturation Voltage | 0.4–0.8 V at 500 mA (limits conduction loss to <400 mW at full load; defines minimum practical duty cycle) |
| Shutdown Thresholds | VIL = 0.8 V, VIH = 2.0 V (ensures reliable interface with 3.3 V or 5 V microcontroller GPIO without level-shifting) |
| Operating Temperature | 0°C to +70°C (validated for commercial portable electronics environments, not extended industrial or automotive) |
Pinout & Package
ADP1109AAN is housed in an 8-lead plastic DIP (N-8) package with 0.300-inch body width and 0.100-inch lead pitch. Pin 1 is marked by a notch or dot; pins 2 and 6 are no-connect (NC) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–9 V unregulated source; requires local 22 µF low-ESR capacitor to suppress switching transients |
| NC (Pin 2) | No connection | Internally unconnected; must be left floating or grounded per PCB layout best practice |
| SW (Pin 3) | Collector of internal NPN switch | Drives external inductor; voltage swings up to 50 V; requires short, low-inductance trace routing |
| PGND (Pin 4) | Power ground return path | Carries high di/dt switching current; must be routed separately from signal GND to avoid noise coupling |
| GND (Pin 5) | Analog ground reference | Reference for internal comparator and reference; connects to clean analog ground plane |
| NC (Pin 6) | No connection | Internally unconnected; must be left floating or grounded per PCB layout best practice |
| SHUTDOWN (Pin 7) | Logic enable/disable control | Active-low input; pulls oscillator offline when ≤0.8 V; draws ≤20 µA at 0 V |
| FB/SENSE (Pin 8) | Feedback node for output regulation | Internally connected to 1.25 V comparator; tied directly to VOUT on ADP1109AAN-3.3 for fixed output |
Key Features
| Feature | Design Value |
|---|---|
| Micropower shutdown mode | 460 µA ground current enables >1-year shelf life in battery-backed memory retention circuits |
| Fixed-output laser trimming | Eliminates external resistor network for 3.3 V version, reducing BOM count and layout area by 2–3 components |
| Gated-oscillator architecture | Removes need for external frequency compensation, simplifying design validation and reducing component count |
| Internal 1.25 V reference | Provides stable feedback threshold across temperature; enables predictable output tolerance without external calibration |
| TTL-compatible shutdown | Direct interface with microcontroller GPIO pins without pull-up resistors or level shifters |
Applications
| Flash Memory VPP Generator | Single-Cell to 5 V Converter |
|---|---|
Use Scenario: Generating +12 V programming voltage for NOR/NAND flash memory in handheld inventory computers using a 3.3 V lithium coin cell. IC Role / Device Role / Timing Role: Step-up regulator providing regulated 12 V output with logic-controlled shutdown to minimize leakage during idle periods. Use Value: Enables 3.3 V system to program flash without external charge pump ICs; achieves 60 mA output at 12 V from 3 V input per typical application Figure 1. |
Use Scenario: Converting 2 V–3 V from single NiMH or alkaline cell to stable 5 V for USB peripheral interface in portable medical sensors. IC Role / Device Role / Timing Role: Primary DC-DC boost converter with fixed 5 V output variant (ADP1109AAN-5); ADP1109AAN-3.3 used as base for adjustable designs. Use Value: Delivers 100 mA at 5 V from 3 V input (per spec table), supporting low-power USB enumeration without requiring dual-cell battery packs. |
| Laptop/Palmtop Power Rail | Portable Instrument Battery Backup |
Use Scenario: Supplying auxiliary 3.3 V rail for real-time clock (RTC) and SRAM backup in clamshell-style palmtop PCs during main power loss. IC Role / Device Role / Timing Role: Low-quiescent-current boost converter activated only when main 5 V rail drops below threshold. Use Value: 460 µA shutdown current extends CR2032 coin cell life to >2 years; 120 kHz switching avoids audible noise in user-facing devices. |
Use Scenario: Maintaining 3.3 V bias for analog front-end and data logger memory during AC power interruption in handheld multimeters. IC Role / Device Role / Timing Role: Standby power manager converting energy from supercapacitor or backup Li-ion cell to regulated 3.3 V. Use Value: Operates down to 2 V input, enabling full utilization of backup cell voltage range before brownout; NC pins simplify PCB routing in dense instrument layouts. |
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 |
|---|---|---|---|
| MAX630CPA+ | Fixed 5 V output only; 100 kHz oscillator; 1.5 mA quiescent current in shutdown | Lacks 3.3 V fixed option; higher ground current reduces battery life in ultra-low-power apps | Select MAX630CPA+ only if 5 V output suffices and 120 kHz switching is not required for inductor size constraints |
| TPS61200DRCT | Adjustable output (0.9–5.5 V); 1.2 MHz switching; 25 µA shutdown current; integrated synchronous rectifier | Requires external resistor divider; higher frequency demands smaller inductors but increases EMI sensitivity | Choose TPS61200DRCT for longer battery life and smaller solution size where adjustable output and layout space are priorities |
Compared with MAX630CPA+ and TPS61200DRCT, ADP1109AAN offers unique fixed 3.3 V output with lowest external component count among DIP-packaged boost converters, making it optimal for legacy through-hole designs and cost-sensitive portable instrumentation where 120 kHz operation balances inductor size and EMI.
Availability
ADP1109AAN is available at Aetrix Electronics and suitable for portable instrumentation, handheld inventory computers, and battery-backed memory retention systems requiring stable component supply with long-lifecycle support.
Supply support for ADP1109AAN 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 technologies for precision measurement and power management.
The ADP1109AAN belongs to Analog Devices' micropower DC-DC converter product line, designed specifically for battery-operated portable electronics where minimal quiescent current, small solution size, and fixed-output simplicity are critical.
FAQ
What is the guaranteed output voltage tolerance for ADP1109AAN across its operating input range?
The ADP1109AAN guarantees 3.30 V output with ±5% tolerance (3.13 V to 3.47 V) when input voltage is between 2 V and 3 V, as specified in the Rev. 0 datasheet under "OUTPUT VOLTAGE" conditions. This tolerance includes initial accuracy, line regulation, and load regulation effects across temperature and process variation - no additional external trimming is required for ADP1109AAN-3.3.
Can ADP1109AAN be used with a 2 V input source, and what is the minimum load it supports?
Yes, ADP1109AAN operates down to 2 V input as confirmed in the Absolute Maximum Ratings and Specifications tables. It supports no minimum load requirement - the device regulates correctly from zero load up to full rated output current. At light loads, the gated oscillator reduces switching frequency to maintain regulation while minimizing quiescent current.
How does the SHUTDOWN pin function on ADP1109AAN, and what are its voltage thresholds?
The SHUTDOWN pin on ADP1109AAN is active-low: applying ≤0.8 V (VIL) disables the oscillator and places the device in micropower shutdown mode drawing 460 µA. Applying ≥2.0 V (VIH) enables normal operation. Input current is ≤10 µA at 4 V and ≤20 µA at 0 V, allowing direct interface with microcontroller GPIO without external buffering.
What package type and lead finish does ADP1109AAN use, and is it RoHS-compliant?
ADP1109AAN uses an 8-lead plastic DIP (N-8) package with matte tin lead finish. While the Rev. 0 datasheet predates RoHS enforcement, Analog Devices confirms this part meets RoHS Directive 2011/65/EU requirements per their official product change notices - no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed threshold limits.
Which external components are mandatory for basic ADP1109AAN operation in fixed 3.3 V mode?
Four mandatory external components are required: input capacitor (22 µF, 16 V low-ESR), power inductor (e.g., 33 µH, 1 A saturation), Schottky output diode (e.g., MBRS130T3), and output capacitor (22 µF, 16 V low-ESR). Unlike adjustable versions, ADP1109AAN-3.3 needs no feedback resistors - FB/SENSE connects directly to VOUT.
ADP1109AAN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1109AAN FAQ
1.How can I place an order for ADP1109AAN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AAN 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 ADP1109AAN reliable?
The price and inventory of ADP1109AAN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AAN is usually 5 days.
3.What payment methods are accepted for ADP1109AAN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AAN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AAN?
ADP1109AAN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AAN 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 ADP1109AAN?
For technical support, including ADP1109AAN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AAN requirements.
6.How does Aetrix verify that ADP1109AAN is sourced from the original manufacturer or authorized distributors?
All ADP1109AAN 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 ADP1109AAN meets industry standards.
7.What is the process for return or replacement of ADP1109AAN?
All ADP1109AAN units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AAN, 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 ADP1109AAN part is unused and in its original packaging.
Return procedure for ADP1109AAN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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