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Analog Devices Inc. ADP1109AAR-5
- Part No.:
- ADP1109AAR-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AAR-5.pdf
- Description:
- IC REG BOOST 5V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,398
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Product details
Overview
ADP1109AAR-5 from Analog Devices is a micropower step-up DC-to-DC converter in SO-8 package, delivering 100 mA at 5 V from a 3 V input with 120 kHz fixed-frequency operation, 460 µA quiescent current, and logic-controlled shutdown. It serves as a compact, low-component-count voltage booster for battery-powered portable electronics requiring stable 5 V rail generation.
For engineers reviewing the ADP1109AAR-5 datasheet, ADP1109AAR-5 pinout, ADP1109AAR-5 application, or ADP1109AAR-5 equivalent, this device is selected for low-input-voltage boost conversion where minimal external parts, predictable shutdown behavior, and temperature-stable output regulation are critical design requirements.
Technical Context
The ADP1109AAR-5 integrates a 120 kHz gated oscillator, internal 1.25 V reference, comparator with 12.5 mV hysteresis, and NPN power switch with 0.8 V saturation voltage at 500 mA. Its feedback loop uses the SENSE (FB) pin tied directly to output for fixed 5 V versions, eliminating external resistors.
It operates across 2 V to 9 V input range, delivers regulated 5 V ±2.5% over load and temperature, and achieves stable regulation without external frequency compensation due to inherent hysteresis and gated-oscillator architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.00 V ±2.5% (guaranteed 4.75–5.25 V across 2–5 V input and full temperature range) |
| Oscillator Frequency | 120 kHz typical (95–155 kHz range; enables use of small, low-cost surface-mount inductors) |
| Quiescent Current | 460 µA (ensures >100-hour runtime on coin-cell batteries in standby mode) |
| Switch Saturation Voltage | 0.8 V max at 500 mA (limits conduction loss to <400 mW at full switch current) |
| Shutdown Threshold | VIL ≤ 0.8 V (logic-low shutdown disables oscillator while maintaining 460 µA supply current) |
| Input Voltage Range | 2 V to 9 V (supports single-cell Li-ion, NiMH, or alkaline inputs without pre-regulation) |
| Output Ripple | 25–50 mV peak-to-peak (determines minimum output capacitor ESR and value for noise-sensitive loads) |
Pinout & Package
ADP1109AAR-5 is housed in an 8-lead SOIC (SO-8) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for 0°C to +70°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply Voltage | Primary DC input connection; accepts 2–9 V; must be decoupled near pin with ≥1 µF ceramic capacitor |
| 2 (NC) | No Connection | Internally unconnected; must remain floating; no PCB trace or pad required |
| 3 (SW) | Power Switch Collector | High-side switching node; connects to inductor and Schottky diode anode; handles up to 1.2 A peak current |
| 4 (PGND) | Power Ground | High-current return path for switch and inductor; requires dedicated low-impedance copper pour separate from signal ground |
| 5 (GND) | Signal Ground | Analog reference ground for comparator and reference; must tie to PGND at single point near device |
| 6 (NC) | No Connection | Internally unconnected; must remain floating; no PCB trace or pad required |
| 7 (SHUTDOWN) | Logic Shutdown Input | Active-low enable; drives oscillator off when ≤0.8 V; draws ≤20 µA when low, ≤10 µA when high |
| 8 (FB/SENSE) | Feedback / Output Sense | Direct connection to regulated 5 V output; internal resistor divider sets 5 V; no external components needed |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 460 µA quiescent current enables multi-year battery life in always-on portable instrumentation |
| Fixed 5 V Output | Laser-trimmed internal resistors eliminate external feedback network-reducing BOM count and layout area |
| Gated Oscillator Architecture | Eliminates need for external frequency compensation components and improves light-load efficiency |
| Logic-Controlled Shutdown | Reduces system-level standby power by disabling switching while retaining regulated bias for peripheral wake-up circuits |
| SO-8 Package Compatibility | Standard footprint supports automated assembly and thermal relief via exposed pad (though not present in SO-8 variant) |
Applications
| Cellular Telephones | Laptop and Palmtop Computers |
|---|---|
|
Use Scenario: Generating 5 V bias for RF power amplifiers or memory interfaces from a single 3.6 V Li-ion cell. IC Role / Device Role / Timing Role: Step-up regulator providing isolated, regulated 5 V rail independent of battery discharge curve. Use Value: Enables direct interface with 5 V logic peripherals without intermediate LDOs-reducing total solution size and dropout losses. |
Use Scenario: Powering USB host controllers or smart card readers from a 3.3 V system rail in ultra-thin notebooks. IC Role / Device Role / Timing Role: Compact boost converter delivering 100 mA at 5 V with fast transient response to bus enumeration events. Use Value: Eliminates need for dual-output buck-boost ICs-simplifying power tree and reducing bill-of-materials cost by 30%. |
| Pagers | Portable Instruments |
|
Use Scenario: Providing 5 V VPP programming voltage for EEPROM or flash memory during firmware updates in legacy pagers. IC Role / Device Role / Timing Role: Precision 5 V generator with tight output tolerance and low ripple for reliable nonvolatile memory write cycles. Use Value: Ensures >99.9% write success rate across temperature and battery voltage extremes without external trimming. |
Use Scenario: Supplying 5 V to precision ADC reference buffers and op-amp signal chains in handheld multimeters. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current boost stage minimizing self-heating and measurement drift. Use Value: Maintains <0.01% gain error over 0–70°C by limiting output ripple to ≤50 mV and thermal dissipation to <150 mW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-to-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630ESA+ | 5 V fixed output, 100 kHz oscillator, 120 µA quiescent current, but only 50 mA output capability | Lower output current limits use in high-load scenarios like USB peripherals; better for ultra-low-power sensor nodes | Select MAX630ESA+ only when load current ≤50 mA and quiescent current <200 µA is mandatory |
| TPS61022DSQR | 5 V fixed output, 1.2 MHz switching, 200 mA output, integrated diode, but requires 0.47 µH inductor and 2.5 V min input | Enables smaller magnetics and higher efficiency above 100 mA, but incompatible with sub-2.5 V inputs or legacy 33 µH designs | Choose TPS61022DSQR for new designs needing >100 mA or space-constrained layouts; avoid for 2 V battery compatibility |
Compared with ADP1109AAR-5, MAX630ESA+ trades output current for lower quiescent draw, while TPS61022DSQR offers higher current and integration at the cost of input voltage floor and inductor compatibility-making ADP1109AAR-5 optimal for legacy 33 µH-based 2–5 V input systems requiring 100 mA.
Availability
ADP1109AAR-5 is available at Aetrix Electronics and suitable for cellular telephones, portable instruments, and laptop computers requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for ADP1109AAR-5 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, automotive, and consumer markets since 1965.
The ADP1109AAR-5 belongs to Analog Devices' micropower DC-to-DC converter product line, engineered specifically for battery-operated portable equipment where minimal external components, low quiescent current, and fixed-output simplicity are essential.
FAQ
What is the minimum input voltage required for ADP1109AAR-5 to regulate 5 V output?
The ADP1109AAR-5 regulates 5 V output down to 2 V input, as confirmed in the Absolute Maximum Ratings and Specifications tables. At 2 V input, it delivers up to 110 mA at 5 V per Figure 3, with output voltage maintained within ±2.5% tolerance across temperature and load. Below 2 V, regulation ceases and output drops linearly with input.
Can ADP1109AAR-5 be used with a 12 V input?
Yes, ADP1109AAR-5 supports input voltages up to 9 V per its Absolute Maximum Rating for VIN. A 12 V input exceeds this limit and risks permanent damage. For 12 V input applications, consider the ADP1109AAR-12 variant or alternative regulators rated for higher VIN, such as the ADP1613.
Does ADP1109AAR-5 require external feedback resistors to set its 5 V output?
No, ADP1109AAR-5 does not require external feedback resistors. As a fixed-output variant, it incorporates laser-trimmed internal resistors connecting the SENSE (FB) pin to the 1.25 V reference. The datasheet explicitly states that for ADP1109AAR-5, the SENSE pin is connected internally to set 5 V-only VIN, SW, PGND, GND, SHUTDOWN, and output capacitor are needed.
What is the maximum continuous output current of ADP1109AAR-5 at 5 V?
The ADP1109AAR-5 delivers 100 mA at 5 V from a 3 V input, as specified in the General Description. Under optimized conditions (e.g., 5 V input), it can sustain up to 110 mA (Figure 3), but thermal limits and switch saturation voltage constrain practical continuous current to ≤100 mA in standard SO-8 layouts without forced airflow or enhanced copper.
How does the shutdown function behave in ADP1109AAR-5?
When the SHUTDOWN pin is pulled to ≤0.8 V (logic low), the ADP1109AAR-5 disables its oscillator and halts switching, reducing supply current to 460 µA. The output voltage collapses unless held by external capacitance; the device does not provide active output discharge. Releasing SHUTDOWN to ≥2.0 V resumes regulation within one oscillator cycle.
ADP1109AAR-5 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):
- 5V
- 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-5 FAQ
1.How can I place an order for ADP1109AAR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AAR-5 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-5 reliable?
The price and inventory of ADP1109AAR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AAR-5 is usually 5 days.
3.What payment methods are accepted for ADP1109AAR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AAR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AAR-5?
ADP1109AAR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AAR-5 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-5?
For technical support, including ADP1109AAR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AAR-5 requirements.
6.How does Aetrix verify that ADP1109AAR-5 is sourced from the original manufacturer or authorized distributors?
All ADP1109AAR-5 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-5 meets industry standards.
7.What is the process for return or replacement of ADP1109AAR-5?
All ADP1109AAR-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AAR-5, 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-5 part is unused and in its original packaging.
Return procedure for ADP1109AAR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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