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Analog Devices Inc. ADP1109AR-5
- Part No.:
- ADP1109AR-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AR-5.pdf
- Description:
- IC REG BOOST 5V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,401
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Product details
Overview
ADP1109AR-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, featuring 120 kHz gated oscillator, 1.25 V internal reference, logic-controlled shutdown, and fixed 5 V output with ±5% regulation over 3–5 V input range.
For engineers reviewing the ADP1109AR-5 datasheet, ADP1109AR-5 pinout, ADP1109AR-5 application, or ADP1109AR-5 equivalent, key selection criteria include input voltage range (2–9 V), quiescent current (450–590 µA), switch saturation voltage (0.4–0.8 V), output ripple (20–50 mV), and compatibility with low-ESR output capacitors and Schottky diodes in portable power designs.
Technical Context
The ADP1109AR-5 implements a gated-oscillator boost topology with internal 1.25 V reference and comparator-based feedback control. Its oscillator activates only when FB(SENSE) voltage falls below 1.25 V, enabling ultra-low quiescent current during light load or standby.
It integrates an NPN power switch with 1.2 A peak current rating and 0.4–0.8 V saturation voltage, operates without external frequency compensation due to built-in hysteresis (8–14 mV), and uses fixed internal resistor divider for 5 V output-eliminating external feedback components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00 V ±5% (4.75–5.25 V), set by internal laser-trimmed resistors-no external feedback required. |
| Oscillator Frequency | 120 kHz typical (100–140 kHz), enables use of compact 10–47 µH surface-mount inductors and reduces EMI filtering burden. |
| Quiescent Current | 450–590 µA (switch off), critical for battery life in always-on or low-duty-cycle portable systems. |
| Input Voltage Range | 2 V to 9 V, supports single-cell Li-ion (3.0–4.2 V), alkaline (2–3 V), or regulated 5 V rail inputs. |
| Switch Saturation Voltage | 0.4–0.8 V at 500 mA, directly impacts conduction loss and efficiency at medium load currents. |
| Output Ripple | 20–50 mV peak-to-peak, achievable with low-ESR tantalum or OS-CON output capacitors. |
| Shutdown Threshold | VIL ≤ 0.8 V, VIH ≥ 2.0 V-compatible with standard CMOS/TTL logic levels for system-level power sequencing. |
Pinout & Package
ADP1109AR-5 is housed in an 8-lead SOIC (SO-8) package with 1.27 mm pitch, measuring 4.90 × 6.00 × 1.75 mm. Pin 2, 5, and 6 are no-connect (NC); functional pins are VIN, SW, GND, SHUTDOWN, and FB(SENSE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 2–9 V unregulated input; must be decoupled locally with low-ESR capacitor. |
| 3 (SW) | Collector of internal NPN switch | Drives external inductor; requires careful layout to minimize parasitic inductance and EMI. |
| 4 (GND) | Analog and power ground reference | Single-point grounding recommended; connects internally to emitter of power switch. |
| 7 (SHUTDOWN) | Logic enable/disable control | Pull low to disable oscillator and reduce current to 450 µA; high-impedance input (≤20 µA leakage). |
| 8 (FB/SENSE) | Feedback sense node | Internally connected to 5 V divider-connect directly to regulated output; no external resistors needed. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5 V output | Eliminates external feedback resistors-reduces BOM count, PCB area, and calibration risk in volume production. |
| Gated oscillator architecture | Enables 450 µA quiescent current under no-load conditions-extends battery runtime in intermittent-use devices. |
| Integrated 1.25 V reference | Provides stable feedback threshold independent of supply variation-ensures consistent regulation across input range. |
| No frequency compensation required | Internal comparator hysteresis (8–14 mV) ensures loop stability-removes need for external compensation network. |
| Logic-compatible shutdown | Supports direct interface with microcontroller GPIO or PMIC sequencer-enables precise system-level power management. |
Applications
| Cellular Telephones | Laptop and Palmtop Computers |
|---|---|
Use Scenario: Generating 5 V bias for RF front-end ICs or camera modules from a single 3.6 V Li-ion cell. IC Role / Device Role / Timing Role: Primary boost regulator providing stable 5 V rail with fast transient response to burst-mode RF transmission. Use Value: Delivers 100 mA at 5 V from 3 V input with <50 mV ripple-meets noise-sensitive analog circuit requirements without additional LDO post-regulation. | Use Scenario: Powering USB peripheral interfaces or smart card readers from a 3.3 V system rail. IC Role / Device Role / Timing Role: Standby-mode boost converter activated only during peripheral enumeration-minimizing idle power draw. Use Value: 450 µA quiescent current and logic shutdown allow >100-hour standby on coin-cell backup-critical for always-connected mobile computing. |
| Pagers | Portable Instruments |
Use Scenario: Supplying 5 V to LED backlight and microcontroller I/O from two AA alkaline cells (2–3 V). IC Role / Device Role / Timing Role: Primary power source with wide input range tolerance-maintains regulation as battery discharges to 2 V. Use Value: Operates down to 2 V input while sustaining 5 V output-enables full device functionality until battery reaches end-of-life voltage. | Use Scenario: Providing isolated 5 V for sensor signal conditioning and ADC reference in handheld multimeters. IC Role / Device Role / Timing Role: Low-noise, low-ripple boost stage preceding precision analog circuitry. Use Value: 20–50 mV output ripple and internal 1.25 V reference ensure <0.1% measurement accuracy-eliminates need for secondary filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2.5 MHz switching frequency, integrated MOSFET, 0.65 V minimum input, 2 A switch current. | Supports higher output current (up to 1.2 A) and smaller inductors/capacitors-suited for space-constrained, higher-power designs. | Choose TPS61022DRVR when board area is limited and load exceeds 100 mA; ADP1109AR-5 remains optimal for ultra-low-quiescent, cost-sensitive, low-current applications. |
| MAX756CSA+ | 500 kHz fixed frequency, 200 mA output, 0.9 V minimum input, external feedback required for 5 V. | Requires two external resistors to set 5 V output-adds BOM cost and layout complexity versus ADP1109AR-5's fixed-output simplicity. | Choose MAX756CSA+ if higher switching frequency is needed for tighter ripple control; ADP1109AR-5 offers lower quiescent current and zero-resistor configuration. |
Compared with TPS61022DRVR and MAX756CSA+, the ADP1109AR-5 delivers superior micropower performance (450 µA IQ) and zero-component fixed 5 V output, making it ideal for long-life battery-powered devices where 100 mA output suffices and board space is not the primary constraint.
Availability
ADP1109AR-5 is available at Aetrix Electronics and suitable for cellular telephones, portable instruments, pagers, laptop peripherals, and battery backup supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP1109AR-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADP1109 product line targets micropower DC-to-DC conversion for portable and battery-operated equipment, emphasizing minimal external components, ultra-low quiescent current, and fixed-output simplicity for cost-sensitive consumer and industrial applications.
FAQ
What is the maximum output current capability of the ADP1109AR-5?
The ADP1109AR-5 can deliver up to 100 mA at 5 V when supplied from a 3 V input, as specified in the Typical Application section. Output current decreases at lower input voltages-for example, 50 mA at 2 V input-due to duty cycle and switch saturation limitations. The internal NPN switch supports 1.2 A peak current, but continuous output is thermally limited by package dissipation and external component selection.
Does the ADP1109AR-5 require external feedback resistors to set its 5 V output?
No, the ADP1109AR-5 does not require external feedback resistors. It incorporates laser-trimmed internal resistors that fix the output to 5.00 V ±5%, and the FB(SENSE) pin is pre-connected to this divider. Users simply connect Pin 8 (FB/SENSE) directly to the output node-no external components are needed for regulation, reducing design complexity and BOM cost.
What is the purpose of the SHUTDOWN pin on the ADP1109AR-5?
The SHUTDOWN pin (Pin 7) on the ADP1109AR-5 provides logic-controlled enable/disable functionality. Applying a logic low (≤0.8 V) disables the internal oscillator, reducing quiescent current to 450 µA and halting switching action. This feature allows system-level power gating-extending battery life in standby modes-and is compatible with standard CMOS/TTL outputs without pull-up resistors.
Which inductor value is recommended for the ADP1109AR-5 in a 2 V to 5 V converter?
For a 2 V to 5 V converter using the ADP1109AR-5, a 15 µH inductor is recommended, as shown in Figure 1 of the datasheet. This value balances energy storage, peak current (≈300 mA at 3 V input), and physical size. Ferrite-core surface-mount inductors with ≥300 mA saturation current and <0.4 Ω DC resistance-such as CTX15-1-are validated for use with the ADP1109AR-5.
Can the ADP1109AR-5 operate from a single alkaline cell?
Yes, the ADP1109AR-5 can operate from a single alkaline cell, which typically ranges from 1.5 V fresh to ~0.9 V depleted. Its 2 V minimum input specification allows reliable startup and regulation down to 2 V, supporting operation through most of the cell's useful discharge curve. At 2 V input, it delivers ~50 mA at 5 V-sufficient for low-power logic, sensors, or LED indicators in remote controls or wireless sensors.
ADP1109AR-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
ADP1109AR-5 FAQ
1.How can I place an order for ADP1109AR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AR-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 ADP1109AR-5 reliable?
The price and inventory of ADP1109AR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AR-5 is usually 5 days.
3.What payment methods are accepted for ADP1109AR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AR-5?
ADP1109AR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AR-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 ADP1109AR-5?
For technical support, including ADP1109AR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AR-5 requirements.
6.How does Aetrix verify that ADP1109AR-5 is sourced from the original manufacturer or authorized distributors?
All ADP1109AR-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 ADP1109AR-5 meets industry standards.
7.What is the process for return or replacement of ADP1109AR-5?
All ADP1109AR-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AR-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 ADP1109AR-5 part is unused and in its original packaging.
Return procedure for ADP1109AR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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