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Analog Devices Inc. ADP1111ARZ-REEL
- Part No.:
- ADP1111ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1111ARZ-REEL.pdf
- Description:
- IC REG BUCK BST ADJ 400MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
ADP1111ARZ-REEL from Analog Devices is a micropower step-up/step-down switching regulator IC with internal 1 A power switch, 72 kHz oscillator, and adjustable or fixed 3.3 V/5 V/12 V output. It operates from 2 V to 30 V input, supports boost, buck, and inverting topologies, and delivers up to 200 mA at 5 V from 12 V input in step-down mode.
For engineers reviewing the ADP1111ARZ-REEL datasheet, ADP1111ARZ-REEL pinout, ADP1111ARZ-REEL application, or ADP1111ARZ-REEL equivalent, key selection considerations include its dual-mode topology flexibility, user-adjustable current limit via ILIM resistor, low 300 μA quiescent current in shutdown, and SO-8 package compatibility with surface-mount inductor designs for portable power conversion.
Technical Context
The ADP1111ARZ-REEL implements a gated-oscillator control architecture with internal 1.25 V reference and comparator-based regulation. Its dual-access power switch (SW1 collector, SW2 emitter) enables reconfigurable step-up, step-down, or inverting operation using external passive components only.
It integrates an uncommitted open-collector gain block (AO pin) usable for low-battery detection or undervoltage lockout, and supports programmable current limiting (400 mA typical with 220 Ω ILIM-to-VIN resistor). The device maintains stable regulation across –40°C to +85°C with ±0.4% reference line regulation over 5–30 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2 V to 30 V - supports single-cell Li-ion (2.7–4.2 V), multi-cell alkaline/NiCd (3–12 V), and industrial 24 V rails without external LDO pre-regulation. |
| Output Voltage Options | Adjustable (via FB divider) or fixed 3.3 V / 5 V / 12 V - laser-trimmed resistors on fixed versions eliminate external feedback network. |
| Oscillator Frequency | 72 kHz typical (54–88 kHz range) - optimized for high efficiency with standard 15–100 μH surface-mount inductors and minimal EMI filtering. |
| Quiescent Current | 300 μA max in shutdown - enables >1-year battery life in low-duty-cycle remote sensors or backup supplies. |
| Switch Current Limit | 400 mA typical with 220 Ω ILIM resistor - protects against overload while allowing peak currents up to 1.5 A absolute maximum. |
| Package | 8-lead SOIC (SO-8) - RoHS-compliant, thermally enhanced plastic package with 1.27 mm pitch, compatible with automated SMT assembly. |
| Operating Temperature | 0°C to +70°C - specified performance across commercial temperature range for laptop peripherals, handheld instruments, and embedded controllers. |
Pinout & Package
ADP1111ARZ-REEL is housed in an 8-lead SOIC (SO-8) package with standard 1.27 mm lead pitch and exposed pad not present. Pin 1 is ILIM, pin 2 is SW1, pin 3 is SW2, pin 4 is GND, pin 5 is VIN, pin 6 is AO, pin 7 is SET, and pin 8 is FB/SENSE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Current limit programming input | Connect to VIN directly for full 1 A switch capability; add resistor to VIN to reduce max switch current (e.g., 220 Ω → 400 mA). |
| SW1 (Pin 2) | Internal power switch collector | In step-up: drives inductor; in step-down: connects to VIN; voltage rating up to 50 V allows wide input headroom. |
| SW2 (Pin 3) | Internal power switch emitter | In step-up: connects to GND; in step-down: drives inductor; must not go below –0.5 V to avoid damage. |
| GND (Pin 4) | Analog and power ground reference | Single ground plane required; ties internal reference, comparator, and oscillator to common return path. |
| VIN (Pin 5) | Main supply input | Accepts 2–30 V DC; powers internal circuitry and supplies current to ILIM and SET pins; bypass capacitor recommended. |
| AO (Pin 6) | Open-collector gain block output | Sinks up to 300 μA; configurable as low-battery detector, post-LDO error amplifier, or UVLO signal with external resistor divider on SET. |
| SET (Pin 7) | Gain block non-inverting input | Connected to resistor divider from VIN to GND; sets AO trip point; bias current 270–400 nA enables high-impedance sensing. |
| FB/SENSE (Pin 8) | Feedback or fixed-output sense node | On ADP1111ARZ-REEL (adjustable version): connects to resistor divider; on fixed versions: tied directly to output for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Topology Flexibility | Single IC supports step-up, step-down, and inverting configurations with no change to core controller - reduces BOM count and design cycle time for multi-rail portable systems. |
| Low Quiescent Power | 300 μA shutdown current enables use in always-on battery-powered devices such as remote controls and flash memory VPP generators where standby drain must be minimized. |
| Integrated 1 A Switch | Eliminates need for external MOSFET or transistor - simplifies layout, reduces footprint, and avoids gate-drive complexity in space-constrained applications like palmtop computers. |
| User-Programmable Current Limit | Single resistor between ILIM and VIN sets precise switch current threshold - prevents inductor saturation and thermal runaway during transient load events or input voltage surges. |
| Low-Battery Detection Capability | AO/SET interface provides configurable undervoltage warning without additional comparators - supports graceful shutdown or display alerts in cellular telephones and portable instruments. |
Applications
| Laptop and Palmtop Computers | Cellular Telephones |
|---|---|
Use Scenario: Generating 5 V rail from 3.3 V system bus to power USB peripherals or SD card interfaces. IC Role / Device Role / Timing Role: Step-up switching regulator providing regulated 5 V output with <50 mV ripple under 100 mA load. Use Value: Enables direct integration of higher-voltage peripherals without requiring separate charge-pump ICs or external boost converters. | Use Scenario: Deriving 3.3 V logic supply from single Li-ion cell (2.7–4.2 V) during discharge cycle. IC Role / Device Role / Timing Role: Step-up/step-down hybrid regulator maintaining stable 3.3 V output across full battery voltage range. Use Value: Extends usable battery life by supporting regulation down to 2 V input, avoiding premature system shutdown. |
| Flash Memory VPP Generators | Battery Backup Supplies |
Use Scenario: Generating +12 V programming voltage for NOR/NAND flash memory write/erase cycles. IC Role / Device Role / Timing Role: Fixed 12 V step-up converter delivering 20 mA with fast transient response to enable short-duration VPP pulses. Use Value: Replaces discrete transistor-based VPP circuits with integrated solution, reducing component count and improving reliability. | Use Scenario: Providing regulated 5 V backup supply for real-time clocks or SRAM during main power failure. IC Role / Device Role / Timing Role: Low-quiescent-current step-down regulator converting 9–12 V battery to 5 V with <1 μA standby draw when inactive. Use Value: Ensures >5-year backup runtime using standard CR2032 coin cells due to sub-500 μA operating current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1370CS8#TRPBF | Fixed 500 kHz frequency, higher 1.5 A switch current, requires external compensation network. | Better suited for high-density PCBs needing smaller inductors; less suitable for ultra-low-IQ battery applications. | Select when higher switching frequency and lower output ripple are prioritized over quiescent current. |
| TPS61040DRVR | 2.5–6 V input range, integrated Schottky diode, 500 kHz fixed frequency, 0.4 A switch current. | Optimized for single-cell Li-ion or 3 V systems; lacks step-down/inverting capability and adjustable current limit. | Choose for compact 3 V–5 V boost-only designs where board space is critical and dual-mode operation is unnecessary. |
Compared with LT1370CS8#TRPBF and TPS61040DRVR, the ADP1111ARZ-REEL offers broader input range (2–30 V), true step-up/step-down reconfigurability, and micropower shutdown - making it uniquely suitable for multi-source industrial and legacy battery-powered equipment where input voltage variability and topology flexibility are essential.
Availability
ADP1111ARZ-REEL is available at Aetrix Electronics and suitable for laptop power management, cellular baseband supplies, flash memory VPP generation, and battery backup systems requiring stable component supply across extended product lifecycles.
Supply support for ADP1111ARZ-REEL 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 ADP1111ARZ-REEL belongs to Analog Devices' micropower DC/DC converter product line, designed specifically for battery-operated and energy-sensitive applications where wide-input-range topology flexibility and ultra-low quiescent current are critical.
FAQ
What is the function of the AO and SET pins on the ADP1111ARZ-REEL?
The AO (pin 6) is an open-collector gain block output that sinks up to 300 μA, and SET (pin 7) is its non-inverting input. Together they form a configurable comparator: connecting a resistor divider from VIN to GND at SET allows AO to assert low when input voltage drops below a user-defined threshold. This enables low-battery detection, UVLO, or post-regulator error signaling in the ADP1111ARZ-REEL without external components.
Can the ADP1111ARZ-REEL operate in step-down mode with a 24 V input?
Yes, the ADP1111ARZ-REEL supports step-down operation up to 30 V input. In step-down mode with 24 V input, it can deliver regulated 5 V or 3.3 V output. However, the internal switch's saturation voltage rises with input voltage (e.g., 1.1–1.5 V at 12 V), so thermal design and current limiting via the ILIM pin become critical above 15 V to maintain efficiency and reliability in the ADP1111ARZ-REEL.
What is the maximum output current achievable with the ADP1111ARZ-REEL in step-up mode?
The ADP1111ARZ-REEL delivers up to 100 mA at 5 V from a 3 V input in step-up mode, as specified in the datasheet. Peak switch current is limited to 1.5 A absolute maximum, but practical output current depends on inductor selection, diode VF, and thermal conditions. With proper 22 μH inductor and Schottky diode, sustained 80–100 mA is achievable; higher loads require external current limiting or alternative regulators.
Is the ADP1111ARZ-REEL pin-compatible with other members of the ADP1111 family?
Yes, all ADP1111 variants-including ADP1111-3.3, ADP1111-5, ADP1111-12, and the adjustable ADP1111ARZ-REEL-share identical SO-8 pinout and electrical interface. The only functional difference is internal laser-trimmed feedback resistors on fixed-output versions; the ADP1111ARZ-REEL requires external R1/R2 on FB/SENSE (pin 8) for voltage setting, enabling full design flexibility.
Does the ADP1111ARZ-REEL require external compensation components?
No, the ADP1111ARZ-REEL uses a gated-oscillator architecture with built-in hysteresis in the feedback comparator, eliminating the need for external compensation networks. Stability is inherent across all operating conditions and topologies, simplifying design and reducing bill-of-materials. This distinguishes the ADP1111ARZ-REEL from voltage-mode PWM controllers that require RC networks for loop stability.
ADP1111ARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 30V
- Current - Output:
- 400mA (Switch)
- Frequency - Switching:
- 72kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1111ARZ-REEL FAQ
1.How can I place an order for ADP1111ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1111ARZ-REEL 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-REEL reliable?
The price and inventory of ADP1111ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1111ARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADP1111ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1111ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1111ARZ-REEL?
ADP1111ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1111ARZ-REEL 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-REEL?
For technical support, including ADP1111ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1111ARZ-REEL requirements.
6.How does Aetrix verify that ADP1111ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADP1111ARZ-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of ADP1111ARZ-REEL?
All ADP1111ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP1111ARZ-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for ADP1111ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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