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Analog Devices Inc. ADP1111AN-12
- Part No.:
- ADP1111AN-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1111AN-12.pdf
- Description:
- IC MULTI CONFIG 12V .2A 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,607
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Product details
Overview
ADP1111AN-12 from Analog Devices is a micropower, fixed-output step-up/step-down switching regulator delivering 12 V at up to 100 mA from a 3 V input (step-up) or 200 mA from a 12 V input (step-down), featuring 72 kHz oscillator frequency, internal 1 A power switch, and operation across 2 V–30 V input range. It supports laptop power rails, flash memory VPP generation, and battery-backed peripherals.
For engineers reviewing the ADP1111AN-12 datasheet, ADP1111AN-12 pinout, ADP1111AN-12 application, or ADP1111AN-12 equivalent, key selection factors include its dual-mode topology support, user-adjustable current limit via ILIM resistor, low 300 μA quiescent current in shutdown, and compatibility with surface-mount inductors in 8-pin DIP packaging.
Technical Context
The ADP1111AN-12 implements a gated-oscillator control architecture with a 1.25 V internal reference and comparator-based regulation loop, enabling stable output without external compensation. Its dual-access power switch (SW1 collector, SW2 emitter) allows reconfiguration between step-up, step-down, and inverting topologies using only three external components.
Current limiting is set by an external resistor from ILIM to VIN, with 220 Ω yielding 400 mA max switch current; the open-collector AO gain block supports low-battery detection or undervoltage lockout. Output voltage is fixed at 12 V via on-chip laser-trimmed resistors-no external feedback network required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00 V ±5% (11.4–12.6 V), guaranteed across load and temperature without external resistors. |
| Oscillator Frequency | 72 kHz typical (54–88 kHz), enabling efficient energy transfer with standard surface-mount inductors (e.g., 22 µH). |
| Input Voltage Range | 2.0–12.6 V (step-up), up to 30.0 V (step-down), supporting wide battery and industrial supply inputs. |
| Quiescent Current | 300–500 μA (switch off), minimizing standby power loss in portable systems. |
| Switch Current Limit | Programmable up to 1.5 A peak; 400 mA default with 220 Ω ILIM-to-VIN resistor for thermal and reliability margin. |
| Saturation Voltage | 0.5–0.65 V (step-up, 3 V/650 mA); 1.1–1.5 V (step-down, 12 V/650 mA), directly impacting conduction loss and efficiency. |
| Output Hysteresis | 75–120 mV, ensuring loop stability and preventing oscillation near regulation threshold. |
Pinout & Package
ADP1111AN-12 is housed in an 8-lead plastic DIP (N-8) package with 0.3-inch body width and through-hole mounting. Pin spacing conforms to JEDEC MS-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ILIM | Current limit programming input | Connect to VIN directly for full 1.5 A capability; add 220 Ω resistor to VIN to limit switch current to 400 mA. |
| 2 SW1 | Collector of internal NPN power switch | In step-up: drives inductor/diode node; in step-down: connects to VIN; rated to 50 V absolute max. |
| 3 GND | Power and signal ground reference | Common return for internal circuitry, feedback, and external components; must be low-impedance. |
| 4 SW2 | Emitter of internal NPN power switch | In step-up: connects to GND; in step-down: drives inductor; must not fall below –0.5 V (Schottky diode required). |
| 5 VIN | Main input voltage supply | Accepts 2–30 V DC; powers internal circuitry and switch driver; decoupling capacitor required. |
| 6 AO | Open-collector auxiliary gain block output | Sinks 300 μA; configurable as low-battery detector, post-regulator, or error amplifier; leave open if unused. |
| 7 SET | Non-inverting input of gain block | Connected to resistor divider from VIN for threshold sensing; bias current 270–400 nA. |
| 8 FB/SENSE | Feedback input / fixed-voltage sense node | Internally connected to laser-trimmed resistor network for 12 V output; no external resistors needed. |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/step-down/inverting topology support | Single IC replaces multiple regulators; enables 3 V→12 V boost, 12 V→5 V buck, or +5 V→–5 V inversion with minimal BOM. |
| Fixed 12 V output with laser-trimmed resistors | Eliminates external feedback network, reduces layout complexity, and ensures ±5% accuracy over temperature and line. |
| User-programmable current limit | Resistor-based ILIM interface allows precise switch current setting (e.g., 400 mA) to match inductor saturation and thermal limits. |
| Low 300 μA quiescent current (shutdown) | Extends battery life in always-on portable devices such as remote controls and backup supplies. |
| Internal 1 A power switch with 72 kHz oscillator | Enables compact designs using standard surface-mount inductors (e.g., Sumida CD54-220K) without external MOSFET or driver. |
Applications
| Flash Memory VPP Generation | Laptop & Palmtop Power Rails |
|---|---|
Use Scenario: Generating +12 V programming voltage for NOR/NAND flash memory during write/erase cycles in embedded systems. IC Role / Device Role / Timing Role: Step-up regulator converting 3.3 V or 5 V system rail to stable 12 V VPP with fast transient response and low ripple. Use Value: Eliminates need for separate charge-pump IC or transformer-based solution; supports JEDEC-compliant VPP timing windows with <120 mV hysteresis. |
Use Scenario: Providing isolated 12 V auxiliary supply for LCD backlight inverters or peripheral card interfaces in battery-powered laptops. IC Role / Device Role / Timing Role: Dual-mode regulator operating in step-down mode from 15–24 V adapter input or step-up from 3 V battery when adapter is disconnected. Use Value: Enables seamless AC/battery switchover without external OR-ing diodes; 72 kHz switching minimizes EMI in RF-sensitive environments. |
| Battery Backup Supplies | Remote Control & Low-Power Peripherals |
Use Scenario: Maintaining 12 V real-time clock (RTC) or SRAM backup during main power failure in industrial controllers. IC Role / Device Role / Timing Role: Step-down regulator converting 24 V system rail to 12 V backup, with low 300 μA quiescent current preserving battery runtime. Use Value: Supports >1-year backup from coin cell or supercapacitor; AO pin enables programmable low-battery warning before brownout. |
Use Scenario: Powering infrared transceivers and microcontroller peripherals in IR remote controls powered by two alkaline cells (3 V). IC Role / Device Role / Timing Role: Step-up regulator generating regulated 12 V from declining 2.0–3.0 V battery input, with built-in low-battery detection. Use Value: Extends usable battery life by 30% vs. linear solutions; 2 V minimum input enables full discharge down to 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 |
|---|---|---|---|
| ADP1111AR-12 | Same silicon die, SO-8 package instead of DIP; identical electrical specs and pinout mapping. | Surface-mount assembly required; better thermal performance and smaller footprint than DIP. | Select ADP1111AR-12 for automated PCB assembly; ADP1111AN-12 remains optimal for prototyping, through-hole boards, or legacy DIP layouts. |
| MAX630CPA+ | Fixed 12 V output, but limited to 100 mA max; 100 kHz oscillator; no ILIM current limit adjustment; different pinout (8-pin DIP, non-compatible). | Lower output current capability and no programmable current limit; lacks AO gain block for low-battery detection. | Choose MAX630CPA+ only if 100 mA output suffices and AO functionality is unnecessary; verify PCB layout changes due to pinout mismatch. |
Compared with ADP1111AN-12, ADP1111AR-12 offers identical regulation performance in a space-saving SO-8 package, while MAX630CPA+ provides basic 12 V step-up capability at lower cost but sacrifices current limit flexibility, AO diagnostics, and step-down mode support.
Availability
ADP1111AN-12 is available at Aetrix Electronics and suitable for flash memory VPP generation, laptop auxiliary power rails, and battery backup supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP1111AN-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, automotive, communications, and consumer markets since 1965.
The ADP1111 family was designed specifically for ultra-low-power, multi-topology DC/DC conversion in portable and battery-critical applications, emphasizing micropower operation, minimal external components, and flexible configuration.
FAQ
What is the maximum output current capability of the ADP1111AN-12 in step-up mode?
The ADP1111AN-12 delivers up to 100 mA at 12 V from a 3 V input in step-up mode, as specified in the datasheet's General Description. This assumes proper inductor selection (e.g., 22 µH Sumida CD54-220K), low-ESR output capacitor, and thermal management. Peak switch current is limited to 1.5 A, but practical output depends on input voltage, duty cycle, and efficiency losses.
Does the ADP1111AN-12 require external feedback resistors to set the 12 V output?
No, the ADP1111AN-12 does not require external feedback resistors. It integrates laser-trimmed internal resistors that fix the output at 12.00 V ±5%, connecting directly to the FB/SENSE pin (Pin 8). External resistors are only needed for the adjustable ADP1111 version-not for ADP1111AN-12.
Can the ADP1111AN-12 operate in step-down mode, and what are the input voltage limits?
Yes, the ADP1111AN-12 supports step-down operation with input voltages up to 30 V, as confirmed in the Absolute Maximum Ratings and Specifications tables. In step-down mode from 12 V input, it delivers up to 200 mA at 12 V output. The SW1 and SW2 pins must be reconfigured per the functional diagram: SW1 to VIN, SW2 to inductor.
What is the purpose of the AO and SET pins on the ADP1111AN-12?
The AO (Pin 6) is an open-collector gain block output that sinks 300 μA, configurable for low-battery detection, undervoltage lockout, or error amplification. The SET (Pin 7) is its non-inverting input, accepting a resistor divider from VIN to ground. Together, they enable system-level monitoring without additional ICs-critical for battery-powered ADP1111AN-12 applications.
Is the ADP1111AN-12 RoHS compliant and lead-free?
Yes, the ADP1111AN-12 is RoHS compliant and lead-free, consistent with Analog Devices' corporate compliance policy effective from 2006. The "AN" suffix denotes the 8-lead plastic DIP package, which meets JEDEC standards for lead-free soldering profiles (reflow peak ≤260°C). Full compliance documentation is available via Analog Devices' product page.
ADP1111AN-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1111AN-12 FAQ
1.How can I place an order for ADP1111AN-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1111AN-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 ADP1111AN-12 reliable?
The price and inventory of ADP1111AN-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1111AN-12 is usually 5 days.
3.What payment methods are accepted for ADP1111AN-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1111AN-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1111AN-12?
ADP1111AN-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1111AN-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 ADP1111AN-12?
For technical support, including ADP1111AN-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1111AN-12 requirements.
6.How does Aetrix verify that ADP1111AN-12 is sourced from the original manufacturer or authorized distributors?
All ADP1111AN-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 ADP1111AN-12 meets industry standards.
7.What is the process for return or replacement of ADP1111AN-12?
All ADP1111AN-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1111AN-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 ADP1111AN-12 part is unused and in its original packaging.
Return procedure for ADP1111AN-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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