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Analog Devices Inc. ADP1111AR-5
- Part No.:
- ADP1111AR-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1111AR-5.pdf
- Description:
- IC MULTI CONFIG 5V .2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:153
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Product details
Overview
ADP1111AR-5 from Analog Devices is a micropower, fixed-output 5 V step-up/step-down switching regulator with internal 1 A power switch, 72 kHz oscillator, and user-adjustable current limit. It operates from 2 V to 30 V input, delivers up to 200 mA at 5 V from 12 V input (step-down), or 100 mA at 5 V from 3 V input (step-up), and is used in battery-powered portable instruments and flash memory VPP generators.
For engineers reviewing the ADP1111AR-5 datasheet, ADP1111AR-5 pinout, ADP1111AR-5 application, or ADP1111AR-5 equivalent, key selection considerations include its dual-mode topology support, 5 V fixed output accuracy (±5%), 300 μA quiescent current in shutdown, and SO-8 package compatibility with surface-mount inductor designs for space-constrained embedded power rails.
Technical Context
The ADP1111AR-5 implements a gated-oscillator control architecture with a 1.25 V internal reference and comparator-based feedback loop, enabling stable regulation without external frequency compensation. Its dual-access power switch (SW1 collector, SW2 emitter) allows reconfigurable step-up, step-down, or inverting topologies using only three external components.
Current limiting is set via an external resistor between ILIM and VIN, with 220 Ω yielding 400 mA maximum switch current. The open-collector AO gain block supports low-battery detection by comparing a resistor-divider voltage at SET against the 1.25 V reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00 V ±5% - guaranteed output within 4.75–5.25 V across load, line, and temperature. |
| Input Voltage Range | 2.0 V to 12.6 V (step-up), up to 30.0 V (step-down) - supports wide battery chemistries including Li-ion, NiCd, and alkaline stacks. |
| Oscillator Frequency | 72 kHz typical - enables use of low-cost, high-saturation-current surface-mount inductors (e.g., 22 µH) without EMI filtering. |
| Quiescent Current | 300–500 μA (switch off) - extends battery life in always-on portable devices such as remote controls and peripherals. |
| Switch Current Limit | Programmable up to 400 mA with 220 Ω resistor - prevents inductor saturation and thermal overload during transient loads. |
| Output Hysteresis | 32–50 mV - ensures loop stability and eliminates need for external compensation networks. |
| Package | SO-8 - RoHS-compliant, thermally enhanced plastic small-outline IC compatible with standard reflow profiles. |
Pinout & Package
ADP1111AR-5 is housed in an 8-lead plastic SOIC (SO-8) package with exposed pad for thermal dissipation. Pin functions are validated per Analog Devices ADP1111 Rev. A datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ILIM | Current limit programming input | Connect to VIN directly for full 1 A switch capability; add 220 Ω resistor to VIN to limit peak current to 400 mA. |
| 2 SW1 | Collector of internal NPN power switch | In step-up: connects to inductor/diode node; in step-down: connects to VIN - defines high-side switching path. |
| 3 SW2 | Emitter of internal NPN power switch | In step-up: connects to GND; in step-down: drives inductor - must not go below –350 mV to avoid damage. |
| 4 GND | Power and signal ground reference | Common return for all internal circuitry and external feedback network; requires low-impedance PCB plane. |
| 5 VIN | Main power supply input | Accepts 2–30 V DC; supplies bias to internal oscillator, reference, and driver stages. |
| 6 AO | Open-collector gain block output | Sinks 300 μA max; used for low-battery detection, UVLO, or post-regulator error amplification. |
| 7 SET | Non-inverting input of gain block | Accepts resistor divider from VIN to GND; sets AO trip point relative to internal 1.25 V reference. |
| 8 FB/SENSE | Feedback input (fixed-output mode) | Internally connected to laser-trimmed resistor divider; connect directly to 5 V output for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/step-down/inverting topology support | Single IC replaces multiple discrete regulators - reduces BOM count and board area in multi-rail portable systems. |
| Internal 1 A NPN power switch | Eliminates need for external MOSFET or transistor - simplifies layout and improves reliability in low-noise applications. |
| User-adjustable current limit | Enables precise inductor sizing and thermal management - avoids overdesign while maintaining safety margin. |
| Low-battery detector via AO/SET pins | Provides system-level power monitoring without additional comparators - supports graceful shutdown in palmtop computers. |
| 72 kHz fixed-frequency operation | Optimizes efficiency vs. size trade-off - allows use of compact, low-DCR surface-mount inductors without audible noise. |
Applications
| Portable Instrument Power Supply | Laptop Peripheral Card |
|---|---|
Use Scenario: Generating stable 5 V rail from variable 3–12 V battery input in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: Primary step-up/step-down DC/DC controller regulating output voltage with 5 V fixed reference and hysteresis-stabilized feedback. Use Value: Delivers 100 mA at 5 V from 3 V input (step-up) or 200 mA at 5 V from 12 V input (step-down), extending operational time per charge cycle. | Use Scenario: Providing isolated 5 V logic supply for USB or PCMCIA add-on cards in legacy laptop docking stations. IC Role / Device Role / Timing Role: Dual-mode regulator adapting to host-supplied 5 V, 9 V, or 12 V inputs while maintaining clean 5 V output for interface ICs. Use Value: Eliminates need for separate boost/buck ICs - reduces component count and enables single-board design across multiple host platforms. |
| Flash Memory VPP Generator | Remote Control Power Management |
Use Scenario: Generating +12 V programming voltage (VPP) for EPROM/EEPROM write operations from 3 V coin cell or AA batteries. IC Role / Device Role / Timing Role: Step-up converter operating at 72 kHz with internal switch and programmable current limit to drive high-impedance VPP load. Use Value: Achieves 12 V output within ±5% tolerance using ADP1111-12 variant; ADP1111AR-5 supports similar topology with external feedback scaling. | Use Scenario: Regulating 5 V supply for IR transmitter and microcontroller in infrared remote controls powered by two alkaline cells (3 V). IC Role / Device Role / Timing Role: Micropower step-up controller with 300 μA shutdown current, enabling >1-year shelf life before first use. Use Value: Maintains regulation down to 2 V input - supports full functionality until battery reaches end-of-life voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Boost-only topology; 28 V max input; 5 V output adjustable via feedback resistors; 500 kHz switching frequency. | Not suitable for step-down or inverting configurations; higher frequency demands smaller inductors but increases EMI filtering complexity. | Select when only step-up is required and board space is constrained - not a functional replacement for ADP1111AR-5's dual-mode capability. |
| MAX630CPA+ | Fixed 5 V output; 2.7–16.5 V input; 100 kHz oscillator; no ILIM pin or AO gain block; DIP-8 package only. | Lacks current limiting and auxiliary gain features; limited to step-up mode; incompatible pinout and thermal performance. | Consider for legacy through-hole designs where dual-mode operation is unnecessary and SO-8 footprint is not required. |
Compared with TPS61040DRVR and MAX630CPA+, the ADP1111AR-5 uniquely supports step-up, step-down, and inverting topologies in a single SO-8 package with programmable current limit and integrated low-battery detection - making it optimal for multi-voltage portable systems requiring minimal external components.
Availability
ADP1111AR-5 is available at Aetrix Electronics and suitable for portable instrument power supplies, laptop peripheral cards, flash memory VPP generation, and remote control power management requiring stable component supply and long-term lifecycle continuity.
Supply support for ADP1111AR-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, automotive, communications, and consumer markets.
The ADP1111 product line was designed for ultra-low-power, multi-topology DC/DC conversion in battery-operated portable electronics - emphasizing minimal external component count, wide input range, and flexible configuration without sacrificing regulation accuracy.
FAQ
What is the output voltage tolerance of the ADP1111AR-5 under full load and temperature variation?
The ADP1111AR-5 delivers a fixed 5.00 V output with guaranteed tolerance of ±5% (4.75 V to 5.25 V) across input voltage, load current (up to 200 mA in step-down mode), and operating temperature (0°C to +70°C). This specification is confirmed in the Rev. A datasheet under "ADP1111–SPECIFICATIONS" table for ADP1111-5 output voltage.
Can the ADP1111AR-5 operate in step-down mode with a 24 V input?
Yes, the ADP1111AR-5 supports step-down operation up to 30 V input, as specified in the Absolute Maximum Ratings and General Description. However, at 24 V input, switch current must be limited using an external resistor on the ILIM pin (e.g., 560 Ω per Figure 6) to prevent exceeding the 650 mA step-down current limit and ensure safe thermal operation of the ADP1111AR-5.
Does the ADP1111AR-5 require external compensation components for stability?
No, the ADP1111AR-5 does not require external compensation components. Its comparator-based feedback loop incorporates built-in hysteresis (32–50 mV for ADP1111-5), which ensures loop stability across all operating conditions without additional capacitors or resistors - a key advantage confirmed in the Theory of Operation section of the datasheet.
What is the maximum continuous output current the ADP1111AR-5 can deliver in step-up mode from a 3 V input?
The ADP1111AR-5 delivers up to 100 mA continuously at 5 V output from a 3 V input in step-up mode, as stated in the General Description. This assumes proper inductor selection (e.g., 22 µH Sumida CD54-220K), Schottky diode (MBRS120T3), and output capacitor (33 µF), per the Typical Application schematic in the datasheet.
Is the ADP1111AR-5 pin-compatible with other variants in the ADP1111 family, such as ADP1111-3.3 or ADP1111-12?
Yes, the ADP1111AR-5 is pin-compatible with ADP1111-3.3 and ADP1111-12 - all share identical SO-8 pinout, electrical characteristics, and functional block diagram. Differences are limited to internal laser-trimmed feedback resistors setting nominal output voltage; no PCB layout changes are required when substituting between fixed-output variants of the ADP1111 family.
ADP1111AR-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1111AR-5 FAQ
1.How can I place an order for ADP1111AR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1111AR-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 ADP1111AR-5 reliable?
The price and inventory of ADP1111AR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1111AR-5 is usually 5 days.
3.What payment methods are accepted for ADP1111AR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1111AR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1111AR-5?
ADP1111AR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1111AR-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 ADP1111AR-5?
For technical support, including ADP1111AR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1111AR-5 requirements.
6.How does Aetrix verify that ADP1111AR-5 is sourced from the original manufacturer or authorized distributors?
All ADP1111AR-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 ADP1111AR-5 meets industry standards.
7.What is the process for return or replacement of ADP1111AR-5?
All ADP1111AR-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1111AR-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 ADP1111AR-5 part is unused and in its original packaging.
Return procedure for ADP1111AR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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