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Analog Devices Inc. ADP1111ANZ-12
- Part No.:
- ADP1111ANZ-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1111ANZ-12.pdf
- Description:
- IC REG BCK BST INV 12V 0.2A 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:776
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Product details
Overview
ADP1111ANZ-12 from Analog Devices is a micropower, fixed-output 12 V step-up/step-down switching regulator with internal 1 A power switch, 72 kHz oscillator, and 2 V to 30 V input voltage range. It delivers up to 200 mA at 12 V in step-down mode from 12 V input and supports low-battery detection via open-collector AO output. Used in portable instruments and battery backup supplies.
For engineers reviewing the ADP1111ANZ-12 datasheet, ADP1111ANZ-12 pinout, ADP1111ANZ-12 application, or ADP1111ANZ-12 equivalent, key selection factors include its fixed 12 V output, ±5% output voltage tolerance, user-adjustable current limit via ILIM pin, 8-pin SOIC package, and compatibility with surface-mount inductors in boost/buck/inverting topologies.
Technical Context
The ADP1111ANZ-12 implements a gated-oscillator control architecture with internal 1.25 V reference and comparator-based regulation. Its dual-switch-node (SW1/SW2) topology enables reconfigurable operation in step-up, step-down, or inverting modes without external MOSFETs.
It integrates a 1 A bipolar power switch with programmable current limit (400 mA typical with 220 Ω ILIM-to-VIN resistor), open-collector gain block (AO) for low-battery detection or post-regulation, and feedback sensing directly tied to laser-trimmed internal resistors for fixed 12 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00 V ±5% - laser-trimmed internal resistors eliminate external feedback network. |
| Oscillator Frequency | 72 kHz typical - sets switching period at ~13.9 μs; enables use of small surface-mount inductors (e.g., 22–68 μH). |
| 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. |
| Quiescent Current | 300–500 μA - enables micropower operation critical for battery-backed systems with long standby life. |
| Switch Current Limit | 400 mA typical with 220 Ω ILIM resistor - protects against overcurrent while allowing scalable design across load ranges. |
| Output Hysteresis | 75–120 mV - ensures stable loop operation without external compensation components. |
| Operating Temperature | 0°C to +70°C - specified for commercial-grade embedded and portable equipment environments. |
Pinout & Package
ADP1111ANZ-12 is housed in an 8-lead plastic SOIC (SO-8) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Pin 1 is ILIM; pin 4 is GND; pin 5 is VIN; pin 6 is SW2; pin 7 is AO; pin 8 is FB/SENSE (internally connected to fixed 12 V divider).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Current limit programming node | Connect to VIN directly for full 1 A switch capability; add 220 Ω resistor to VIN to set 400 mA limit - prevents inductor saturation and thermal overload. |
| VIN (Pin 5) | Main supply input | Accepts 2–30 V DC; powers internal circuitry and switch driver - must be decoupled with ≥10 μF ceramic capacitor near pin. |
| SW1 (Pin 3) | Collector of internal NPN switch | In step-up: connects to inductor/diode; in step-down: connects to VIN - withstands up to 50 V transient per absolute max rating. |
| SW2 (Pin 6) | Emitter of internal NPN switch | In step-up: connects to GND; in step-down: drives inductor - must not go below –0.5 V to avoid damage; requires Schottky diode return path. |
| GND (Pin 4) | Analog and power ground reference | Single-point connection for FB, SET, AO, and internal reference - critical for noise immunity and regulation accuracy. |
| FB/SENSE (Pin 8) | Feedback input (fixed-voltage mode) | Internally tied to laser-trimmed resistor divider for 12 V output - connect directly to regulated output; no external resistors required. |
| AO (Pin 7) | Open-collector gain block output | Sinks up to 300 μA; used for low-battery detection (e.g., pull-up to VIN with resistor divider on SET pin) or undervoltage lockout. |
| SET (Pin 2) | Non-inverting input of gain amplifier | Accepts voltage divider from VIN to GND; when SET < 1.25 V, AO pulls low - enables customizable battery threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/step-down/inverting topology support | Configurable via external component routing - eliminates need for separate boost/buck ICs in multi-rail portable designs. |
| Internal 1 A bipolar power switch | Reduces BOM count and PCB area - avoids discrete transistor + driver complexity while maintaining 1.5 A absolute max switch current. |
| User-adjustable current limit | Single resistor (e.g., 220 Ω) on ILIM pin sets precise 400 mA limit - enables consistent inductor sizing and thermal management across production units. |
| Low-battery detector with AO output | Open-collector NPN output sinks 300 μA - allows direct interface to microcontroller GPIO or LED driver without level-shifting. |
| Laser-trimmed fixed 12 V output | ±5% tolerance over temperature and line - guarantees output stability without calibration or trimming during manufacturing. |
Applications
| Portable Instrument Power | Battery Backup Supply |
|---|---|
Use Scenario: Handheld multimeter powered by two AA cells (1.8–3.2 V) requiring stable 12 V for analog front-end op-amps and LCD bias. IC Role / Device Role / Timing Role: Step-up regulator generating 12 V from 3 V input with 200 mA peak capability and micropower quiescent current. Use Value: Enables single-cell-compatible design with >100-hour battery life and no external feedback components due to fixed 12 V laser trim. | Use Scenario: RAM retention circuit in industrial PLC using supercapacitor charged from 5 V rail, needing 12 V during main power loss. IC Role / Device Role / Timing Role: Step-down regulator converting 12 V backup source to regulated 12 V output with low dropout behavior and fast transient response. Use Value: Maintains clean 12 V rail during brownout events with <500 μA quiescent draw, extending hold-up time without additional LDO stages. |
| Flash Memory VPP Generator | Remote Control Power Management |
Use Scenario: Embedded microcontroller system requiring +12 V programming voltage (VPP) for EEPROM write cycles, sourced from 3.3 V logic rail. IC Role / Device Role / Timing Role: On-demand step-up converter activated only during flash programming, minimizing average power consumption. Use Value: Delivers precise 12.0 V ±5% for reliable memory writes while drawing only 300 μA in standby - eliminates need for charge-pump ICs with poor regulation. | Use Scenario: IR remote control using single alkaline cell (0.9–1.6 V end-of-life) needing regulated 12 V for high-power LED driver during transmission bursts. IC Role / Device Role / Timing Role: Micropower step-up regulator operating down to 2 V input, supporting intermittent 12 V pulses with fast start-up (<10 μs). Use Value: Extends usable battery life by 3× vs. linear solutions and enables consistent IR range despite voltage sag - validated at 0°C to +70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1111ARZ-12 | Same die, RoHS-compliant 8-lead SOIC package (lead-free, matte tin finish); identical electrical specs and pinout. | No functional difference - suitable for new designs requiring lead-free compliance and extended temperature screening. | Select ADP1111ARZ-12 for RoHS/REACH-compliant production; ADP1111ANZ-12 remains valid for legacy qualification or cost-sensitive commercial builds. |
| MAX630CPA+ | Fixed 12 V output, 100 kHz oscillator, 500 mA switch, but requires external diode and lacks AO gain block or ILIM current limit. | Less flexible topology support - limited to step-up only; no integrated low-battery detection or programmable current limiting. | Choose MAX630CPA+ only if board space permits external diode and AO functionality is unnecessary; ADP1111ANZ-12 offers superior integration and configurability. |
Compared with ADP1111ARZ-12, the ADP1111ANZ-12 shares identical regulation accuracy and thermal performance but uses non-RoHS-compliant lead finish; versus MAX630CPA+, it adds topology flexibility, current limiting, and diagnostic capability at minimal BOM cost increase.
Availability
ADP1111ANZ-12 is available at Aetrix Electronics and suitable for portable instruments, battery backup supplies, flash memory VPP generation, and remote control power management requiring stable component supply across extended product lifecycles.
Supply support for ADP1111ANZ-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 family was designed for ultra-low-power, multi-topology DC/DC conversion in space-constrained portable and battery-operated systems - emphasizing micropower operation, minimal external components, and flexible voltage conversion.
FAQ
What is the output voltage tolerance of the ADP1111ANZ-12?
The ADP1111ANZ-12 provides a fixed 12.00 V output with ±5% tolerance over temperature (0°C to +70°C) and line (2 V to 30 V input), guaranteed by laser-trimmed internal resistors. Measured output voltage falls within 11.40 V to 12.60 V under all specified conditions, eliminating need for external feedback calibration.
Can the ADP1111ANZ-12 operate in step-down mode from a 24 V input?
Yes, the ADP1111ANZ-12 supports step-down operation up to 30 V input. When configured for buck mode with SW1 connected to VIN and SW2 driving the inductor, it delivers regulated 12 V output. Ensure SW2 does not drop below –0.5 V by using a Schottky diode return path and verify switch current stays within 650 mA limit for reliability.
How is current limiting implemented on the ADP1111ANZ-12?
Current limiting is set via the ILIM pin: connecting a 220 Ω resistor between ILIM and VIN programs a 400 mA switch current limit. Without the resistor (ILIM tied directly to VIN), the device operates at full 1 A capability. The limit activates within ~1 μs of overcurrent detection, protecting the internal switch and external inductor.
Does the ADP1111ANZ-12 require external compensation components?
No, the ADP1111ANZ-12 uses inherent comparator hysteresis (75–120 mV for ADP1111-12) to ensure loop stability without external compensation. This eliminates timing-critical RC networks and simplifies layout - verified across input voltage (2–30 V) and temperature (0°C to +70°C) ranges per datasheet Figure 9.
What package type is used for the ADP1111ANZ-12?
The ADP1111ANZ-12 uses an 8-lead plastic SOIC (SO-8) package per JEDEC MS-012AC standard, with 5.0 mm × 6.2 mm body size and 1.27 mm lead pitch. It is not pin-compatible with DIP variants (e.g., ADP1111AN-12) due to different thermal and mechanical footprints.
ADP1111ANZ-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
ADP1111ANZ-12 FAQ
1.How can I place an order for ADP1111ANZ-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1111ANZ-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 ADP1111ANZ-12 reliable?
The price and inventory of ADP1111ANZ-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1111ANZ-12 is usually 5 days.
3.What payment methods are accepted for ADP1111ANZ-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1111ANZ-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1111ANZ-12?
ADP1111ANZ-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1111ANZ-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 ADP1111ANZ-12?
For technical support, including ADP1111ANZ-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1111ANZ-12 requirements.
6.How does Aetrix verify that ADP1111ANZ-12 is sourced from the original manufacturer or authorized distributors?
All ADP1111ANZ-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 ADP1111ANZ-12 meets industry standards.
7.What is the process for return or replacement of ADP1111ANZ-12?
All ADP1111ANZ-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1111ANZ-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 ADP1111ANZ-12 part is unused and in its original packaging.
Return procedure for ADP1111ANZ-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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