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Analog Devices Inc. ADP1073AR-12
- Part No.:
- ADP1073AR-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1073AR-12.pdf
- Description:
- IC REG BUCK BOOST 12V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,639
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Product details
Overview
ADP1073AR-12 from Analog Devices is a micropower step-up/step-down DC–DC converter IC with fixed 12 V output, internal 1 A power switch, and operation down to 1.0 V input. It delivers up to 10 mA at 12 V from a 1.0 V source and supports both boost and buck topologies in an SO-8 package for battery-powered instrumentation.
For engineers reviewing the ADP1073AR-12 datasheet, ADP1073AR-12 pinout, ADP1073AR-12 application, or ADP1073AR-12 equivalent, key selection criteria include its 1.0 V minimum input voltage, 12.00 V ±5% output accuracy, 100 µA quiescent current in step-up mode, and integrated current limit via ILIM pin - critical for single-cell portable designs requiring long battery life and wide VIN range.
Technical Context
The ADP1073AR-12 uses a gated-oscillator control architecture with 19 kHz typical switching frequency and 38 µs fixed ON time. Its comparator references a trimmed 212 mV internal reference, enabling stable regulation without external compensation components.
It integrates dual-mode topology support: in step-up mode, SW2 connects to GND and SW1 drives the inductor; in step-down mode, SW1 connects to VIN and SW2 drives the inductor. The fixed 12 V output is laser-trimmed on-die, eliminating external feedback resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12.00 V ±5% (guaranteed over temperature and line/load) |
| Input Voltage Range | 1.0 V to 12.6 V (step-up), up to 30 V (step-down) - enables single alkaline/NiMH cell operation |
| Quiescent Current | 100 µA (step-up, no load) - minimizes standby power loss in battery systems |
| Oscillator Frequency | 14–24 kHz (typ. 19 kHz) - low-frequency switching reduces EMI and enables use of low-cost inductors |
| Internal Switch Rating | 1 A peak, 600 mV saturation voltage at 500 mA - supports moderate output current with minimal conduction loss |
| Output Hysteresis | 300–600 mV - ensures loop stability and prevents oscillation near regulation threshold |
| Current Limit Control | External resistor between ILIM and VIN sets switch current (e.g., 220 Ω → 400 mA) - enables safe operation under overload |
Pinout & Package
ADP1073AR-12 is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Pin 1 is marked by a dot or notch; thermal pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit enable input | Connect to VIN for full 1 A switch current; add resistor to VIN to reduce max switch current (e.g., 220 Ω → 400 mA) |
| 2 - VIN | Main power input | Supplies controller core and internal switch; accepts 1.0–30 V depending on topology |
| 3 - SW1 | Power switch collector | In step-up: connects to inductor/diode; in step-down: connects to VIN - defines topology configuration |
| 4 - SW2 | Power switch emitter | In step-up: connects to GND; in step-down: connects to inductor - must not drop >0.4 V below GND |
| 5 - GND | Analog and power ground | Common reference for all internal circuitry; requires low-impedance connection to system ground plane |
| 6 - AO | Auxiliary gain amplifier output | Open-collector NPN output sinking up to 100 µA - usable as low-battery detector or UVLO signal |
| 7 - SET | Gain amplifier non-inverting input | Accepts resistor divider from VIN to set AO trip point; referenced to internal 212 mV reference |
| 8 - FB/SENSE | Feedback sense input | Direct connection to regulated 12 V output (no external resistors required for ADP1073AR-12) |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 100 µA quiescent current enables >1-year battery life in intermittent-use instruments |
| Dual-mode topology support | Single IC replaces separate boost/buck controllers - reduces BOM count and layout complexity |
| Laser-trimmed 12 V output | Eliminates external feedback resistors and associated tolerance stack-up - improves output accuracy and production yield |
| Integrated low-battery detection | AO output provides programmable undervoltage warning without external comparators or references |
| Robust switch protection | Reverse battery rating to –0.4 V on SW2 and 1.5 A absolute max switch current - enhances field reliability |
Applications
| Single-Cell to 12 V Conversion | Laptop/Palmtop Auxiliary Supply |
|---|---|
Use Scenario: Generating +12 V bias from a single 1.5 V alkaline cell for op-amp rails or sensor excitation in handheld test equipment. IC Role / Device Role / Timing Role: Primary DC–DC regulator providing isolated, stabilized 12 V output with ultra-low quiescent current. Use Value: Enables true single-cell operation without voltage doubling stages - reduces component count and board area by 40% vs. discrete solutions. | Use Scenario: Powering LCD backlight drivers or USB peripheral interfaces in legacy palmtop computers with aging battery packs. IC Role / Device Role / Timing Role: Secondary regulated supply delivering stable 12 V from degraded 3.3–4.2 V Li-ion sources during brownout conditions. Use Value: Maintains functionality down to 1.0 V input - extends usable battery runtime by 22% compared to 1.2 V minimum competitors. |
| Battery Backup Supplies | 4 mA–20 mA Loop-Powered Instruments |
Use Scenario: Providing fail-safe 12 V hold-up power during AC mains interruption in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Standby DC–DC converter activated only when main supply drops below threshold - minimizes self-discharge. Use Value: 100 µA quiescent current limits backup battery drain to <1% per month - supports >3-year shelf life. | Use Scenario: Generating local 12 V rail for analog front-end circuitry in two-wire 4–20 mA transmitters powered solely by loop current. IC Role / Device Role / Timing Role: High-efficiency step-up regulator converting 8–30 V loop voltage to precise 12 V for ADC reference and signal conditioning. Use Value: Delivers 10 mA at 12 V from 8 V input with >78% efficiency - meets stringent loop power budget constraints (<3.5 mA total draw). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC–DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630ESA+ | Fixed 12 V output, 1.5 V min input, 120 µA IQ, SO-8 - lacks dual-mode topology and adjustable current limit | Optimized for low-noise linear post-regulation; not suitable for step-down configurations | Select when strict output ripple <50 mV is required and input never exceeds 12 V |
| TPS61200DRCR | Adjustable 1.2–5.5 V output, 0.3 V min input, 50 µA IQ, 1.2 MHz switching - no fixed 12 V option or step-down capability | Targets ultra-low-voltage energy harvesting; requires external feedback network for any output voltage | Select when input is sub-1 V (e.g., thermoelectric or piezoelectric sources) and 12 V is generated via cascaded conversion |
Compared with MAX630ESA+ and TPS61200DRCR, ADP1073AR-12 uniquely combines fixed 12 V accuracy, true step-up/step-down flexibility, and sub-1.2 V start-up - making it the only single-chip solution for 12 V generation across 1.0–30 V input range without external resistors or topology rework.
Availability
ADP1073AR-12 is available at Aetrix Electronics and suitable for battery-powered instrumentation, loop-powered transmitters, portable medical devices, and industrial backup supplies requiring stable component supply and long-term obsolescence management.
Supply support for ADP1073AR-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 ADP1073 product line was designed specifically for ultra-low-voltage, micropower DC–DC conversion in space-constrained portable and battery-critical systems - emphasizing single-cell compatibility and topology flexibility.
FAQ
What is the minimum input voltage required for ADP1073AR-12 to regulate 12 V output?
The ADP1073AR-12 regulates 12 V output down to a minimum input voltage of 1.0 V in step-up mode, as confirmed in the Absolute Maximum Ratings and Electrical Specifications tables. At 1.0 V input, it delivers 10 mA into the 12 V output. Operation below 1.0 V is not guaranteed and may result in dropout or unregulated output. The 1.0 V start-up capability is enabled by its proprietary gated-oscillator architecture and low-threshold comparator.
Does ADP1073AR-12 require external feedback resistors to set the 12 V output?
No, ADP1073AR-12 does not require external feedback resistors. Its 12 V output is set by laser-trimmed on-die resistors, as stated in the General Description and Ordering Guide. Pin 8 (FB/SENSE) connects directly to the 12 V output node. This eliminates resistor tolerance errors and simplifies layout - a key differentiator from the adjustable ADP1073 base part.
Can ADP1073AR-12 operate in step-down mode, and what are the input voltage limits?
Yes, ADP1073AR-12 supports step-down (buck) mode with input voltage up to 30 V, as specified in the Absolute Maximum Ratings and GENERAL DESCRIPTION. In step-down mode, SW1 connects to VIN and SW2 drives the inductor. The device maintains regulation across the full 1.0–30 V input range, but output current capability scales inversely with VIN/VOUT ratio - e.g., higher input yields lower max output current due to duty cycle and switch stress limits.
What is the purpose of the AO pin on ADP1073AR-12, and how is it used?
The AO pin on ADP1073AR-12 is an open-collector auxiliary gain amplifier output capable of sinking 100 µA. It functions as a programmable low-battery detector or undervoltage lockout signal. By connecting a resistor divider from VIN to GND with the junction at the SET pin, the AO output goes low when VIN falls below a user-defined threshold - enabling system-level power management without external components.
How is current limiting implemented on ADP1073AR-12, and what resistor value sets 400 mA?
Current limiting on ADP1073AR-12 is implemented by connecting a resistor between the ILIM pin and VIN. Per the datasheet's Figure 4 and specification table, a 220 Ω resistor sets the maximum switch current to 400 mA at +25°C. The current limit has a temperature coefficient of –0.3%/°C, and the internal switch is rated for 1.5 A absolute maximum - ensuring robust short-circuit handling when properly configured.
ADP1073AR-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP1073
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 19kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1073AR-12 FAQ
1.How can I place an order for ADP1073AR-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1073AR-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 ADP1073AR-12 reliable?
The price and inventory of ADP1073AR-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1073AR-12 is usually 5 days.
3.What payment methods are accepted for ADP1073AR-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1073AR-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1073AR-12?
ADP1073AR-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1073AR-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 ADP1073AR-12?
For technical support, including ADP1073AR-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1073AR-12 requirements.
6.How does Aetrix verify that ADP1073AR-12 is sourced from the original manufacturer or authorized distributors?
All ADP1073AR-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 ADP1073AR-12 meets industry standards.
7.What is the process for return or replacement of ADP1073AR-12?
All ADP1073AR-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1073AR-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 ADP1073AR-12 part is unused and in its original packaging.
Return procedure for ADP1073AR-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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