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Analog Devices Inc. ADP1111ARZ-12
- Part No.:
- ADP1111ARZ-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1111ARZ-12.pdf
- Description:
- IC MULTI CONFIG 12V .2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,784
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Product details
Overview
ADP1111ARZ-12 from Analog Devices is a micropower, fixed-output step-up/step-down switching regulator with internal 1 A power switch, 72 kHz oscillator, and 12 V output. It operates from 2 V to 30 V input (step-down) or 2 V to 12.6 V (step-up), delivers up to 200 mA at 12 V from 12 V input in step-down mode, and supports battery-powered instrumentation requiring stable mid-rail voltage generation.
For engineers reviewing the ADP1111ARZ-12 datasheet, ADP1111ARZ-12 pinout, ADP1111ARZ-12 application, or ADP1111ARZ-12 equivalent, key selection criteria include its dual-mode topology support, user-adjustable current limit via ILIM resistor, low 300 μA quiescent current in shutdown, integrated 1.25 V reference, and compatibility with surface-mount inductors for compact DC/DC conversion.
Technical Context
The ADP1111ARZ-12 implements a gated-oscillator control architecture with a fixed 72 kHz switching frequency and 7 μs typical ON time. Its comparator uses 1.25 V internal reference with 12.5 mV hysteresis to ensure loop stability without external compensation components.
It features an uncommitted open-collector gain block (AO pin) with 6000 V/V gain and 300 μA sink capability, configurable as low-battery detector or post-regulator error amplifier. The internal bipolar power switch has VIN-referenced ILIM pin for programmable current limiting and supports both step-up (SW2 to GND) and step-down (SW1 to VIN) configurations via accessible collector/emitter terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00 V ±5% - laser-trimmed internal resistors eliminate external feedback network. |
| Input Voltage Range | 2.0 V to 12.6 V (step-up), 2.0 V to 30.0 V (step-down) - enables single-supply operation across wide battery chemistries. |
| Switching Frequency | 72 kHz typical - balances efficiency, EMI, and inductor size; stable over temperature and input voltage. |
| Quiescent Current | 300–500 μA (switch off) - enables multi-year battery life in low-duty-cycle portable instruments. |
| Internal Power Switch | 1 A rated, bipolar NPN - supports direct drive of inductors without external transistors in most applications. |
| Current Limit Accuracy | 400 mA typical with 220 Ω ILIM-to-VIN resistor - protects against overload while maintaining regulation under varying load conditions. |
| Oscillator Hysteresis | 12.5 mV - ensures robust start-up and prevents sub-harmonic oscillation without external timing components. |
Pinout & Package
ADP1111ARZ-12 is housed in an 8-lead SOIC package (SO-8), RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ILIM | Current limit programming input | Connect to VIN directly for full 1 A switch current; add 220 Ω resistor to VIN to set 400 mA limit - enables safe operation with small inductors. |
| 2 SW1 | Collector of internal 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 power switch | In step-up: connects to GND; in step-down: drives inductor - defines low-side switching path; must not go below −350 mV. |
| 4 GND | Power and signal ground reference | Common return for all internal circuitry and external components - requires low-impedance PCB plane for noise immunity. |
| 5 VIN | Main input supply connection | Accepts 2–30 V DC; powers internal bias circuits and switch driver - decoupling capacitor required within 1 cm. |
| 6 AO | Open-collector gain block output | Sinks up to 300 μA; configured as low-battery detector by resistor divider on SET pin - provides system-level monitoring without extra IC. |
| 7 SET | Non-inverting input of gain block | Connected to resistor divider from VIN to GND; sets trip point for AO output - enables customizable undervoltage lockout. |
| 8 FB/SENSE | Feedback input / fixed-voltage sense | Internally connected to laser-trimmed 12 V divider - no external resistors needed; ties directly to output for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/step-down/inverting topology support | Single IC replaces multiple regulators - reduces BOM count and PCB area in multi-rail portable systems. |
| User-adjustable current limit | Resistor-programmable from 400 mA to 1 A - avoids overdesign of magnetics while ensuring short-circuit robustness. |
| Low quiescent current (300 μA) | Enables >5-year battery life in intermittent-use devices like remote sensors and handheld test gear. |
| Integrated 1.25 V reference with 0.075%/V line regulation | Maintains output accuracy across full input range - eliminates need for external precision reference in cost-sensitive designs. |
| Open-collector AO gain block | Configurable as low-battery detector, post-LDO error amp, or UVLO - adds system supervision without discrete comparators. |
Applications
| Battery-Powered Instrumentation | Laptop Peripheral Power |
|---|---|
Use Scenario: Portable multimeter generating 12 V for analog front-end op-amps from two AA cells (3 V). IC Role / Device Role / Timing Role: Step-up regulator providing isolated 12 V rail with minimal quiescent draw between measurements. Use Value: Enables high-precision measurement capability without compromising battery runtime - 300 μA shutdown current extends alkaline cell life beyond 3 years. |
Use Scenario: USB-powered docking station supplying 12 V to external SCSI hard drive controller. IC Role / Device Role / Timing Role: Step-down regulator converting 12 V adapter input to regulated 12 V output with ripple suppression. Use Value: Delivers stable 12 V at 200 mA with <120 mV output hysteresis - ensures reliable drive for legacy peripherals without external LDO. |
| Flash Memory VPP Generation | Remote Control Power Management |
Use Scenario: Embedded microcontroller programming flash memory requiring 12 V VPP during write cycles. IC Role / Device Role / Timing Role: On-demand step-up converter activated only during programming - minimizes standby power. Use Value: Generates precise 12.00 V ±5% from 3.3 V MCU rail using internal feedback - eliminates need for external DAC or charge pump. |
Use Scenario: IR remote control using single lithium coin cell (3 V) requiring 12 V for LED driver pulse. IC Role / Device Role / Timing Role: Burst-mode step-up regulator delivering short 12 V pulses to IR LED array. Use Value: Achieves 72 kHz switching with 7 μs ON time - optimizes energy transfer per pulse while maintaining <500 μA average current draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up/step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1931IS5#TRMPBF | Fixed 12 V output, 1.2 MHz switching, 1.25 A switch, but requires external feedback for adjustable versions. | Higher frequency enables smaller inductors but increases EMI sensitivity - less suitable for noise-critical instrumentation. | Choose when board space is constrained and EMI filtering can be added; avoid if ultra-low quiescent current (<500 μA) is mandatory. |
| TPS61040DRVR | Adjustable output (1.8–28 V), 500 kHz, 0.5 A switch, 20 μA quiescent current - no fixed 12 V variant. | Requires external resistor divider for 12 V setting; lacks AO gain block for system monitoring functions. | Prefer for ultra-low-power applications where 12 V is one of many required rails; not drop-in due to different pinout and no integrated 12 V trim. |
Compared with LT1931IS5#TRMPBF and TPS61040DRVR, the ADP1111ARZ-12 offers unique integration of fixed 12 V output, dual-mode topology, and system supervision (AO/SET) in a single SO-8 package - making it optimal for cost-sensitive, battery-operated equipment needing minimal external components and built-in battery monitoring.
Availability
ADP1111ARZ-12 is available at Aetrix Electronics and suitable for battery backup supplies, flash memory VPP generation, and portable instrumentation requiring stable component supply with long-term lifecycle assurance.
Supply support for ADP1111ARZ-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, headquartered in Norwood, MA.
The ADP1111 product line was designed for micropower DC/DC conversion in portable and battery-operated systems, emphasizing low quiescent current, topology flexibility, and minimal external component count.
FAQ
What is the maximum output current capability of the ADP1111ARZ-12 in step-down mode?
The ADP1111ARZ-12 delivers up to 200 mA at 12 V from a 12 V input in step-down mode, as confirmed in the General Description section of the datasheet. This assumes proper thermal management and use of recommended external components including a Schottky diode and low-ESR output capacitor. Higher currents require external current limiting via the ILIM pin or external transistor augmentation.
Does the ADP1111ARZ-12 require external feedback resistors to set the 12 V output?
No, the ADP1111ARZ-12 does not require external feedback resistors. As a fixed-output variant, it integrates laser-trimmed internal resistors that set the output to 12.00 V ±5%. The FB/SENSE pin (Pin 8) connects directly to the output node for regulation - eliminating design complexity and component tolerance errors associated with external dividers.
Can the ADP1111ARZ-12 operate from a 1.8 V input supply?
No, the ADP1111ARZ-12 cannot operate from a 1.8 V input. Its minimum input voltage is 2.0 V in step-up mode and 2.0 V in step-down mode, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. For sub-2 V operation, Analog Devices recommends the ADP1110, which is explicitly designed for inputs down to 1.1 V.
What is the purpose of the AO and SET pins on the ADP1111ARZ-12?
The AO (Pin 6) is an open-collector gain block output capable of sinking 300 μA, and SET (Pin 7) is its non-inverting input referenced to the internal 1.25 V bandgap. Together they enable configurable system functions such as low-battery detection (by connecting a resistor divider from VIN to GND at SET), undervoltage lockout, or error amplification - all without adding discrete comparators or supervisors.
Is the ADP1111ARZ-12 pin-compatible with other members of the ADP1111 family?
Yes, the ADP1111ARZ-12 shares identical SO-8 pinout and electrical interface with all ADP1111 variants (e.g., ADP1111ARZ-5, ADP1111ARZ-3.3, and adjustable ADP1111ARZ). Pin functions - including ILIM, SW1, SW2, FB/SENSE, AO, and SET - are fully consistent across the family, enabling drop-in replacement when output voltage requirements change.
ADP1111ARZ-12 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
ADP1111ARZ-12 FAQ
1.How can I place an order for ADP1111ARZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1111ARZ-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 ADP1111ARZ-12 reliable?
The price and inventory of ADP1111ARZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1111ARZ-12 is usually 5 days.
3.What payment methods are accepted for ADP1111ARZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1111ARZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1111ARZ-12?
ADP1111ARZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1111ARZ-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 ADP1111ARZ-12?
For technical support, including ADP1111ARZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1111ARZ-12 requirements.
6.How does Aetrix verify that ADP1111ARZ-12 is sourced from the original manufacturer or authorized distributors?
All ADP1111ARZ-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 ADP1111ARZ-12 meets industry standards.
7.What is the process for return or replacement of ADP1111ARZ-12?
All ADP1111ARZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1111ARZ-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 ADP1111ARZ-12 part is unused and in its original packaging.
Return procedure for ADP1111ARZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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