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Analog Devices Inc. ADP1073AR-3.3
- Part No.:
- ADP1073AR-3.3
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1073AR-3.3.pdf
- Description:
- IC REG BUCK BOOST 3.3V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,553
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Product details
Overview
ADP1073AR-3.3 from Analog Devices is a micropower step-up/step-down DC–DC converter IC with fixed 3.3 V output, internal 1 A power switch, and operation down to 1.0 V input. It delivers up to 40 mA at 3.3 V from 1.25 V input and supports both boost and buck topologies in an SO-8 package for single-cell battery-powered instrumentation.
For engineers reviewing the ADP1073AR-3.3 datasheet, ADP1073AR-3.3 pinout, ADP1073AR-3.3 application, or ADP1073AR-3.3 equivalent, key selection criteria include minimum input voltage (1.0 V), quiescent current (100 µA), output accuracy (±4.7% over temperature), internal current limit (400 mA), and SO-8 thermal performance in portable low-power systems.
Technical Context
The ADP1073AR-3.3 uses a gated-oscillator control architecture with a 19 kHz typical switching frequency and 38 µs fixed ON time. Its comparator references a trimmed 212 mV internal bandgap and includes 5–10 mV hysteresis for loop stability without external compensation.
It integrates dual-mode switch terminals (SW1 collector, SW2 emitter) enabling configurable boost, buck, or inverting topologies. The fixed 3.3 V version embeds laser-trimmed feedback resistors, eliminating external dividers while maintaining 3.14–3.47 V output regulation across temperature and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4.7%; guaranteed 3.14–3.47 V across 0°C to +70°C and full load range. |
| Input Voltage Range | 1.0 V to 12.6 V in step-up mode; up to 30 V in step-down mode - enables single alkaline/NiMH cell operation. |
| Quiescent Current | 100 µA typical at no load - extends battery life in always-on portable instruments. |
| Switch Current Limit | 400 mA typical with 220 Ω ILIM-to-VIN resistor - protects internal NPN transistor under overload. |
| Oscillator Frequency | 14–24 kHz; 19 kHz typical - balances efficiency, EMI, and inductor size for low-frequency SMPS designs. |
| Output Ripple | Typically 90–130 mV peak-to-peak at 3.3 V output - reduced further using AO gain block feedback. |
| Operating Temperature | 0°C to +70°C - qualified for commercial industrial and portable equipment environments. |
Pinout & Package
ADP1073AR-3.3 is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC footprint, 1.27 mm pitch, and 1.75 mm max height. Thermal resistance θJA is 160°C/W on 1-in² 2-oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit programming input | Connect to VIN directly for full 1 A switch capability; add 220 Ω to VIN to set 400 mA limit - prevents thermal runaway during short-circuit events. |
| 2 - VIN | Main power input | Accepts 1.0–30 V; supplies internal bias and drives switch base - requires local 10 µF decoupling if >2 inches from battery source. |
| 3 - SW1 | Internal NPN collector | In boost mode: connects to inductor/diode node; in buck mode: ties to VIN - defines high-side switching path and voltage stress rating (50 V max). |
| 4 - SW2 | Internal NPN emitter | In boost mode: connects to GND; in buck mode: drives inductor - must not fall below –350 mV to avoid latch-up or damage. |
| 5 - GND | Analog and power ground reference | Single-point return for feedback, oscillator, and amplifier blocks - critical for noise immunity in micropower operation. |
| 6 - AO | Auxiliary open-collector output | Sinks 100 µA max; used for low-battery detection or linear post-regulation - SET pin bias enables programmable trip point. |
| 7 - SET | Gain block non-inverting input | Connected to resistor divider from VIN; referenced to 212 mV internal reference - sets AO activation threshold independent of output regulation. |
| 8 - FB/SENSE | Feedback input (fixed-voltage mode) | Internally tied to laser-trimmed resistor network for 3.3 V output - connect directly to regulated output; no external resistors required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage operation | Starts regulation at 1.0 V input - powers 3.3 V logic from single NiMH or alkaline cell through full discharge. |
| Configurable topology support | SW1/SW2 dual-terminal access enables boost, buck, and inverting converters without external switches - reduces BOM count by one active device. |
| Integrated low-battery detector | AO output with SET-pin programmability provides system-level undervoltage warning before brownout - eliminates need for separate supervisor IC. |
| Laser-trimmed fixed output | ADP1073AR-3.3 achieves ±4.7% output tolerance without external resistors - improves production yield and reduces layout sensitivity vs. adjustable versions. |
| Thermal-safe current limiting | User-adjustable ILIM pin allows precise 400 mA limit with 220 Ω resistor - avoids derating due to ambient temperature rise in sealed enclosures. |
Applications
| Hand-Held Inventory Computers | Battery Backup Supplies |
|---|---|
Use Scenario: Portable barcode scanners powered by two AA cells requiring stable 3.3 V for microcontroller and display driver. IC Role / Device Role / Timing Role: Primary DC–DC regulator providing regulated 3.3 V rail from 1.2–3.0 V battery stack with micropower sleep mode. Use Value: 100 µA quiescent current extends runtime beyond 12 months on primary alkaline cells; 1.0 V start-up ensures full utilization of cell capacity. | Use Scenario: SRAM backup circuit in industrial PLCs where main 5 V rail may fail unexpectedly. IC Role / Device Role / Timing Role: Standby converter generating 3.3 V from supercapacitor or coin cell during main power loss. Use Value: Operates down to 1.0 V input enables use of discharged backup cells; fixed 3.3 V output matches SRAM VDD spec without calibration. |
| 4 mA–20 mA Loop Powered Instruments | Portable Instruments |
Use Scenario: Two-wire field transmitter drawing loop current while powering internal 3.3 V sensor interface and ADC. IC Role / Device Role / Timing Role: Low-noise, low-quiescent step-down regulator deriving 3.3 V from 12–40 V loop supply. Use Value: 30 V max step-down input accommodates full loop compliance range; SO-8 package fits tight PCB space constraints. | Use Scenario: Handheld multimeter with LCD, microcontroller, and analog front-end operating from single AAA cell. IC Role / Device Role / Timing Role: Micropower boost converter supplying regulated 3.3 V to digital core from 0.9–1.5 V battery. Use Value: 1.0 V start-up and 100 µA IQ enable >500 hours of continuous measurement; fixed output simplifies certification testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower DC–DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630ESA+ | Fixed 3.3 V output; 1.5 V min input; 120 µA IQ; 200 mA switch; SO-8 package | Lower output current capability; no dual-mode topology support; no AO auxiliary output | Choose when only basic boost functionality and lower cost are priorities over programmability and topology flexibility. |
| TPS61200DRCR | Adjustable 1.2–5.5 V output; 0.3 V min input; 50 µA IQ; 1.2 A switch; 10-pin WSON package | Requires external feedback resistors; higher integration but different footprint and no integrated low-battery detector | Choose when ultra-low IQ and sub-1 V start-up are mandatory, and board space allows rework for WSON layout. |
Compared with MAX630ESA+ and TPS61200DRCR, the ADP1073AR-3.3 uniquely combines 1.0 V start-up, dual-mode topology, fixed 3.3 V accuracy, and AO-based system monitoring in a standard SO-8 - making it optimal for space-constrained, battery-life-critical instrumentation where design reuse and test simplicity matter.
Availability
ADP1073AR-3.3 is available at Aetrix Electronics and suitable for hand-held inventory computers, battery backup supplies, and 4 mA–20 mA loop powered instruments requiring stable component supply across long-lifecycle industrial deployments.
Supply support for ADP1073AR-3.3 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, founded in 1965 and headquartered in Wilmington, MA.
The ADP1073 product line was designed specifically for ultra-low-voltage, micropower DC–DC conversion in portable and battery-backed instrumentation - emphasizing single-cell compatibility, minimal external components, and robust operation across temperature.
FAQ
What is the minimum input voltage required for ADP1073AR-3.3 to regulate 3.3 V output?
The ADP1073AR-3.3 regulates its 3.3 V output down to a minimum input voltage of 1.0 V in step-up mode, as confirmed in the Absolute Maximum Ratings and Typical Performance Characteristics sections of the official datasheet. At 1.25 V input, it delivers 40 mA; at 1.0 V input, it sustains 10 mA. This capability enables full discharge utilization of single alkaline or NiMH cells.
Does ADP1073AR-3.3 require external feedback resistors to set the 3.3 V output?
No, the ADP1073AR-3.3 does not require external feedback resistors. It integrates laser-trimmed internal resistors that fix the output to 3.3 V. Per the Pin Function Descriptions, the FB/SENSE pin (Pin 8) connects directly to the output - eliminating external components and ensuring ±4.7% output accuracy across temperature and line/load conditions.
Can ADP1073AR-3.3 be used in step-down (buck) configuration?
Yes, ADP1073AR-3.3 supports step-down operation with input voltages up to 30 V. Its dual-switch terminals (SW1 collector, SW2 emitter) allow reconfiguration: in buck mode, SW1 connects to VIN and SW2 drives the inductor. The datasheet confirms step-down mode functionality and provides Figure 16 as a reference design with 6 V to 3.3 V conversion.
What is the purpose of the AO pin on ADP1073AR-3.3?
AO is an open-collector auxiliary output on ADP1073AR-3.3 capable of sinking 100 µA. When used with a resistor divider on the SET pin, it functions as a programmable low-battery detector or undervoltage lockout - asserting low when input voltage drops below a user-defined threshold. This eliminates the need for a separate supervisor IC in portable systems.
Is ADP1073AR-3.3 pin-compatible with other variants in the ADP1073 family?
Yes, ADP1073AR-3.3 shares identical SO-8 pinout and terminal functions with ADP1073AR-5, ADP1073AR-12, and the adjustable ADP1073AR. All variants use the same ILIM, VIN, SW1, SW2, GND, AO, SET, and FB/SENSE pin assignments - enabling drop-in replacement across output voltage options without PCB revision.
ADP1073AR-3.3 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):
- 3.3V
- 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-3.3 FAQ
1.How can I place an order for ADP1073AR-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1073AR-3.3 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-3.3 reliable?
The price and inventory of ADP1073AR-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1073AR-3.3 is usually 5 days.
3.What payment methods are accepted for ADP1073AR-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1073AR-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1073AR-3.3?
ADP1073AR-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1073AR-3.3 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-3.3?
For technical support, including ADP1073AR-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1073AR-3.3 requirements.
6.How does Aetrix verify that ADP1073AR-3.3 is sourced from the original manufacturer or authorized distributors?
All ADP1073AR-3.3 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-3.3 meets industry standards.
7.What is the process for return or replacement of ADP1073AR-3.3?
All ADP1073AR-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1073AR-3.3, 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-3.3 part is unused and in its original packaging.
Return procedure for ADP1073AR-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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