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Analog Devices Inc. ADP1109AR-12
- Part No.:
- ADP1109AR-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AR-12.pdf
- Description:
- IC REG BOOST 12V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:937
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Product details
Overview
ADP1109AR-12 from Analog Devices is a micropower step-up DC-to-DC converter with fixed 12 V output, designed for battery-powered systems requiring efficient voltage boosting from low-input sources (e.g., 3–12 V input to 12 V output at 60 mA). It integrates an internal NPN power switch, 1.25 V reference, comparator with 14 mV hysteresis, and 120 kHz gated oscillator. Used in flash memory VPP generation and portable instrumentation.
For engineers reviewing the ADP1109AR-12 datasheet, ADP1109AR-12 pinout, ADP1109AR-12 application, or ADP1109AR-12 equivalent, key selection criteria include its 12 V fixed output accuracy (±4.6%), 450 µA shutdown quiescent current, SO-8 package compatibility, and absence of external feedback resistors-critical for space-constrained, low-power boost designs.
Technical Context
The ADP1109AR-12 implements a gated-oscillator architecture where the 120 kHz oscillator activates only when the FB(SENSE) pin voltage falls below 1.25 V, enabling ultra-low quiescent current (450 µA in shutdown, 590 µA typical operating). Its internal 1.25 V reference feeds one comparator input, while the other receives feedback directly from the regulated 12 V output via an internal laser-trimmed resistor divider.
It uses a single NPN bipolar power switch (VCESAT ≤ 0.8 V at 500 mA, VIN = 5 V) with no internal current limiting-requiring external inductor saturation current rating ≥1.2 A. The shutdown pin accepts TTL-compatible logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) to disable oscillation without altering bias conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.00 V ±4.6% (11.45–12.55 V), laser-trimmed for fixed-output stability without external resistors |
| Oscillator Frequency | 120 kHz typical (90–155 kHz range), enables use of compact 15–33 µH surface-mount inductors |
| Input Voltage Range | 2 V to 9 V (absolute max 12 V), supports single-cell Li-ion or multi-cell alkaline inputs |
| Quiescent Current | 450–590 µA (shutdown mode), critical for battery life extension in standby operation |
| Switch Saturation Voltage | ≤0.8 V at 500 mA (VIN = 5 V), limits conduction loss and thermal rise in boost stage |
| Comparator Hysteresis | 8–14 mV, ensures stable regulation loop without external frequency compensation components |
| Output Ripple | 40–110 mV peak-to-peak, defines minimum output capacitor ESR and capacitance requirements |
Pinout & Package
ADP1109AR-12 is housed in an 8-lead SOIC (SO-8) package with 1.27 mm pitch, compliant with JEDEC MS-012. Pin 1 is VIN; pins 2, 5, 6 are NC; pin 3 is SW (collector of internal NPN switch); pin 4 is GND; pin 7 is SHUTDOWN (TTL-compatible enable); pin 8 is FB(SENSE), internally connected to set 12 V output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–9 V DC; must be decoupled with ≥10 µF ceramic capacitor near pin |
| NC (Pins 2, 5, 6) | No electrical connection | Must remain unconnected; no routing or thermal pad required |
| SW (Pin 3) | Internal NPN switch collector | Drives external inductor; requires low-inductance layout to minimize switching noise |
| GND (Pin 4) | Power and signal reference | Primary return path for switch current and feedback; separate analog/digital ground not required |
| SHUTDOWN (Pin 7) | Logic-controlled oscillator enable | Low = oscillator off (450 µA IQ); high = normal operation; 10 µA input current at 2 V |
| FB(SENSE) (Pin 8) | Feedback node for output regulation | Internally tied to 12 V divider; connect directly to regulated output-no external resistors needed |
Key Features
| Feature | Design Value |
|---|---|
| Micropower shutdown mode | 450 µA quiescent current preserves battery capacity during system sleep states |
| Fixed 12 V output with laser trimming | Eliminates external feedback resistors-reduces BOM count and layout area by 2 components |
| Gated-oscillator control | Enables hysteresis-based regulation without compensation network, simplifying design validation |
| Integrated NPN power switch | Supports up to 1.2 A peak switch current; avoids discrete transistor selection and drive complexity |
| TTL-compatible shutdown interface | Direct connection to microcontroller GPIO without level-shifting circuitry |
Applications
| Flash Memory VPP Generation | Portable Instrument Power |
|---|---|
Use Scenario: Generating +12 V programming voltage for EPROM/flash memory chips in handheld test equipment. IC Role / Device Role / Timing Role: Step-up DC-DC converter providing regulated high-voltage supply during write/erase cycles. Use Value: Delivers 60 mA at 12 V from 5 V logic rail with <110 mV ripple-ensuring reliable memory programming without external LDO post-regulation. |
Use Scenario: Powering analog front-end circuits (e.g., op-amps, ADC references) in battery-operated multimeters. IC Role / Device Role / Timing Role: Primary boost regulator converting 3 V battery output to stable 12 V rail for precision analog subsystems. Use Value: Achieves ±4.6% output accuracy and 450 µA shutdown IQ-extending battery life while maintaining measurement integrity. |
| Laser Diode Bias Supply | Hand-Held Inventory Computer |
Use Scenario: Providing adjustable bias voltage to laser diodes in barcode scanners with variable optical power needs. IC Role / Device Role / Timing Role: Fixed-output boost stage delivering clean 12 V to laser driver ICs with minimal EMI. Use Value: 120 kHz switching frequency allows use of shielded toroidal inductors-reducing radiated emissions near sensitive RF sections. |
Use Scenario: Supplying 12 V to EEPROM and display backlight in ruggedized warehouse inventory terminals. IC Role / Device Role / Timing Role: High-efficiency voltage booster enabling operation across wide battery discharge range (3–9 V input). Use Value: Operates down to 2 V input-supporting full functionality until battery reaches end-of-life, improving device uptime. |
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 |
|---|---|---|---|
| MAX680ESA+ | Dual charge-pump topology; no inductor required; 12 V output derived from ±6 V doubler; 100 µA IQ | Better suited for ultra-low-noise, low-current (<10 mA) bias rails-not for 60 mA continuous loads | Select MAX680ESA+ only if inductor-free design and sub-10 mA load are acceptable |
| TPS61040DRVR | Higher efficiency (90% vs. ~82% typical for ADP1109AR-12); 500 kHz switching; integrated Schottky; 20 µA shutdown IQ | Requires external feedback resistors for 12 V; supports wider input (1.8–6 V); better for high-density PCBs | Choose TPS61040DRVR when board space, efficiency >85%, or sub-2 V start-up are mandatory |
Compared with MAX680ESA+ and TPS61040DRVR, ADP1109AR-12 offers lowest BOM count for fixed 12 V boost (no resistors, no Schottky), moderate efficiency, and proven reliability in industrial portable gear-but lacks modern ultra-low-IQ or high-frequency advantages.
Availability
ADP1109AR-12 is available at Aetrix Electronics and suitable for flash memory programming, portable instrumentation, laser diode biasing, and hand-held computing applications requiring stable component supply with long-term lifecycle support.
Supply support for ADP1109AR-12 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, communications, and automotive markets since 1965.
The ADP1109AR-12 belongs to Analog Devices' micropower DC-DC converter product line, engineered for low-input-voltage, low-quiescent-current boost applications in battery-powered portable electronics.
FAQ
What is the maximum output current capability of the ADP1109AR-12?
The ADP1109AR-12 delivers up to 60 mA at 12 V when supplied from a 5 V input, as specified in the Typical Application section. Output current is limited by internal switch saturation voltage (≤0.8 V), thermal dissipation (300 mW max), and external inductor saturation rating. Exceeding 60 mA may cause regulation loss or thermal shutdown in sustained operation.
Does the ADP1109AR-12 require external feedback resistors to set its 12 V output?
No, the ADP1109AR-12 does not require external feedback resistors. Its 12 V output is set by internal laser-trimmed resistors connected to the FB(SENSE) pin (Pin 8), which is designed to be connected directly to the output. This eliminates two external components and associated layout sensitivity compared to adjustable versions like ADP1109AR.
What is the recommended inductor value for the ADP1109AR-12 in a 5 V to 12 V conversion?
Analog Devices recommends a 15 µH inductor (e.g., CTX15-1) for 5 V to 12 V operation at 60 mA, as shown in Figure 2. Inductor selection must ensure saturation current ≥1.2 A and DC resistance <0.4 Ω. A 33 µH inductor is also validated in application notes for lower ripple at reduced peak current-both values are compatible with the ADP1109AR-12's 120 kHz switching frequency.
Can the ADP1109AR-12 operate from a single 3 V lithium coin cell?
Yes, the ADP1109AR-12 operates from input voltages as low as 2 V, making it compatible with single-cell Li-MnO₂ or Li-coin cells. At 3 V input, it delivers ~40 mA at 12 V (per Figure 2). However, output current drops as input voltage decreases due to duty cycle limitations and switch losses-designers should verify load requirements across the full battery discharge curve.
Is the ADP1109AR-12 pin-compatible with other variants in the ADP1109 family?
Yes, all ADP1109 variants-including ADP1109AR-3.3, ADP1109AR-5, ADP1109AR-12, and ADP1109AR (adjustable)-share identical SO-8 pinouts and thermal footprints. Pin functions (VIN, SW, GND, SHUTDOWN, FB/SENSE) are consistent across variants, enabling drop-in replacement during prototyping or BOM optimization-provided output voltage and load requirements align.
ADP1109AR-12 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):
- 12V
- 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
ADP1109AR-12 FAQ
1.How can I place an order for ADP1109AR-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AR-12 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 ADP1109AR-12 reliable?
The price and inventory of ADP1109AR-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AR-12 is usually 5 days.
3.What payment methods are accepted for ADP1109AR-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AR-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AR-12?
ADP1109AR-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AR-12 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 ADP1109AR-12?
For technical support, including ADP1109AR-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AR-12 requirements.
6.How does Aetrix verify that ADP1109AR-12 is sourced from the original manufacturer or authorized distributors?
All ADP1109AR-12 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 ADP1109AR-12 meets industry standards.
7.What is the process for return or replacement of ADP1109AR-12?
All ADP1109AR-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AR-12, 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 ADP1109AR-12 part is unused and in its original packaging.
Return procedure for ADP1109AR-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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