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Analog Devices Inc. ADP1073AN-3.3
- Part No.:
- ADP1073AN-3.3
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1073AN-3.3.pdf
- Description:
- IC REG BUCK BOOST 3.3V 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,191
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Product details
Overview
ADP1073AN-3.3 from Analog Devices is a micropower step-up/step-down DC–DC converter 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 single-cell battery-powered instrumentation requiring low quiescent current and wide input range.
For engineers reviewing the ADP1073AN-3.3 datasheet, ADP1073AN-3.3 pinout, ADP1073AN-3.3 application, or ADP1073AN-3.3 equivalent, key selection criteria include its 100 µA quiescent current in step-up mode, 3.14–3.47 V output regulation tolerance, 14–24 kHz oscillator frequency, and compatibility with DIP-8 packaging for through-hole prototyping and industrial control modules.
Technical Context
The ADP1073AN-3.3 implements a gated-oscillator topology with an internal 212 mV reference and comparator hysteresis (90–130 mV), enabling burst-mode operation that reduces quiescent current to 100 µA when regulation is met. Its dual-mode capability allows configuration as either boost (SW2 grounded, SW1 driving inductor) or buck (SW1 tied to VIN, SW2 driving inductor), with duty cycle ranging 57–80%.
It integrates an uncommitted gain block (A2) with 400–1000 V/V gain for auxiliary functions like low-battery detection, and features user-adjustable current limiting via external resistor between ILIM and VIN-enabling precise 400 mA limit setting with 220 Ω. The device operates across 0°C to +70°C with no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V, guaranteed 3.14–3.47 V over temperature and load |
| Input Voltage Range | 1.0 V to 12.6 V in step-up mode; up to 30 V in step-down mode |
| Quiescent Current | 100 µA typical in step-up mode, enabling >1-year battery life in 10 µA-load systems |
| Oscillator Frequency | 14–24 kHz, providing 28–50 µs switch-on time for stable light-load regulation |
| Switch Current Limit | Internally set to 400 mA with 220 Ω resistor on ILIM pin; temperature coefficient –0.3%/°C |
| Output Ripple | Typically 125 mV peak-to-peak at 5 V; for ADP1073AN-3.3, ripple scales proportionally (~83 mV) |
| Package | 8-Lead Plastic DIP (N-8), 0.3-inch width, through-hole mount compatible with legacy PCB layouts |
Pinout & Package
ADP1073AN-3.3 is housed in an 8-lead plastic DIP (N-8) package with 0.3-inch body width and standard 0.1-inch pin pitch. Pin 1 is marked by a notch or dot; pins are numbered counterclockwise from top-left in top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit programming input | Connect to VIN directly for default 400 mA limit; add resistor to VIN to reduce switch current |
| 2 - VIN | Main power input | Accepts 1.0–12.6 V (step-up) or up to 30 V (step-down); reverse battery tolerant to –0.4 V |
| 3 - SW1 | Power switch collector | In step-up: drives inductor; in step-down: connects to input rail; max voltage 50 V |
| 4 - SW2 | Power switch emitter | In step-up: connect to GND; in step-down: drives inductor; must not drop >0.4 V below GND |
| 5 - GND | Analog and power ground | Common reference for FB, SET, AO, and internal reference; requires low-impedance layout |
| 6 - AO | Auxiliary gain amplifier output | Open-collector NPN, sinks 100 µA; used for low-battery flag or linear post-regulation |
| 7 - SET | Gain block non-inverting input | Accepts resistor divider from VIN to set low-battery threshold referenced to 212 mV |
| 8 - FB/SENSE | Feedback input (fixed-voltage version) | Internally connected to laser-trimmed resistive divider; connect directly to regulated 3.3 V output |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 100 µA quiescent current enables multi-year runtime on coin cells or alkaline AA/AAA |
| Dual-mode topology support | Single IC supports boost, buck, and inverting configurations without external controller changes |
| Integrated 1 A power switch | Eliminates need for external MOSFET or BJT, reducing BOM count and board space in portable designs |
| Laser-trimmed fixed output | ADP1073AN-3.3 uses on-die resistors for ±4.7% output accuracy (3.14–3.47 V), removing external feedback network |
| On-chip low-battery detector | Configurable via SET/AO pins to assert flag when input drops below user-defined threshold |
Applications
| Hand-Held Inventory Computers | Battery Backup Supplies |
|---|---|
Use Scenario: Portable barcode scanners powered by single AA/AAA cells requiring stable 3.3 V logic supply during intermittent RF and display activity. IC Role / Device Role / Timing Role: Primary DC–DC regulator converting 1.0–1.6 V battery voltage to regulated 3.3 V for microcontroller, memory, and interface ICs. Use Value: 100 µA quiescent current extends battery life beyond 2 years in sleep-dominated usage; 1.0 V start-up ensures full functionality until cell depletion. | Use Scenario: SRAM or real-time clock backup circuits maintaining data during main power loss, using primary battery or supercapacitor. IC Role / Device Role / Timing Role: Low-current step-up regulator generating 3.3 V from 1.2 V NiMH/NiCd or 1.0 V lithium thionyl chloride cells. Use Value: Guaranteed operation down to 1.0 V input enables use of ultra-low-voltage chemistries; reverse-battery protection prevents damage during polarity reversal. |
| 4 mA–20 mA Loop Powered Instruments | Pagers |
Use Scenario: Field-mounted pressure or temperature transmitters drawing power from industrial 4–20 mA current loop, requiring isolated 3.3 V for sensor signal conditioning. IC Role / Device Role / Timing Role: Auxiliary supply generator deriving 3.3 V from loop voltage (typically 12–36 V), operating in step-down mode with minimal dropout. Use Value: 30 V step-down input rating and 100 µA IQ allow reliable startup and regulation even at lowest loop voltage (12 V) and lightest load conditions. | Use Scenario: Legacy two-way pagers with tight space constraints and single-cell alkaline power, needing clean 3.3 V for RF front-end and baseband ASIC. IC Role / Device Role / Timing Role: Primary power converter configured in boost mode to generate 3.3 V from 1.5 V nominal cell voltage. Use Value: Fixed 3.3 V output eliminates trimming resistors; DIP-8 package simplifies hand-soldering during repair or low-volume assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC–DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630CPA+ | Fixed 3.3 V output, 100 µA IQ, but only supports step-up mode; no step-down capability | Not suitable for buck or inverting topologies; limited to boost-only designs with VIN < VOUT | Select MAX630CPA+ only if application exclusively requires boost conversion from sub-3 V sources |
| TPS61200DRCR | Adjustable output (0.9–5.5 V), 50 µA IQ, integrated 1.2 A switch, but requires external feedback resistors for 3.3 V | Higher efficiency at medium loads (>50 mA), but adds two precision resistors and lacks laser-trimmed fixed output | Choose TPS61200DRCR when adjustable output or lower IQ is critical, accepting added BOM complexity |
Compared with MAX630CPA+ and TPS61200DRCR, ADP1073AN-3.3 uniquely combines fixed 3.3 V output, dual-mode topology support, and DIP-8 packaging-making it optimal for legacy-replacement, low-volume, or repair-focused designs where simplicity and configurability outweigh ultra-low-IQ requirements.
Availability
ADP1073AN-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, long-lifecycle support, and through-hole assembly compatibility.
Supply support for ADP1073AN-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADP1073 family was designed for ultra-low-power, wide-input-voltage DC–DC conversion in portable and battery-critical systems-emphasizing micropower operation, single-cell compatibility, and topology flexibility without external compensation.
FAQ
What is the guaranteed output voltage tolerance of the ADP1073AN-3.3?
The ADP1073AN-3.3 guarantees an output voltage of 3.14 V to 3.47 V across temperature (0°C to +70°C) and load conditions, corresponding to ±4.7% tolerance around the nominal 3.3 V. This specification is ensured by on-chip laser-trimmed resistors and applies specifically to the ADP1073AN-3.3 variant-not the adjustable ADP1073AN. No external feedback components are required.
Can the ADP1073AN-3.3 operate in step-down (buck) mode?
Yes, the ADP1073AN-3.3 supports step-down operation with input voltages up to 30 V. In buck mode, SW1 is connected to VIN and SW2 drives the inductor. The device maintains regulation at 3.3 V output while delivering up to 40 mA from inputs as low as 3.5 V. Its 57–80% duty cycle and internal 1 A switch enable efficient conversion without external FETs.
What is the minimum input voltage required for the ADP1073AN-3.3 to start regulation?
The ADP1073AN-3.3 starts regulation at an input voltage as low as 1.0 V in step-up mode, verified across temperature. At 1.0 V input, it delivers 10 mA at 3.3 V output. This capability enables direct use with depleted alkaline, NiMH, or lithium thionyl chloride cells-critical for long-life battery backup and portable instrumentation applications.
How is current limiting implemented on the ADP1073AN-3.3?
Current limiting on the ADP1073AN-3.3 is implemented by connecting a resistor between the ILIM pin and VIN. A 220 Ω resistor sets the switch current limit to 400 mA at +25°C, with a temperature coefficient of –0.3%/°C. If no resistor is used, ILIM is tied directly to VIN for the default 400 mA limit. The circuit includes a 2 µs delay to prevent false triggering during transient overload.
Is the ADP1073AN-3.3 pin-compatible with other variants in the ADP1073 family?
Yes, the ADP1073AN-3.3 shares identical pinout and package (8-lead DIP) with ADP1073AN, ADP1073AN-5, and ADP1073AN-12. All variants use the same FB/SENSE pin connection-direct tie to output for fixed versions, or external resistor divider for the adjustable ADP1073AN. This allows drop-in replacement within the same package footprint when output voltage requirements change.
ADP1073AN-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP1073
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1073AN-3.3 FAQ
1.How can I place an order for ADP1073AN-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1073AN-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 ADP1073AN-3.3 reliable?
The price and inventory of ADP1073AN-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 ADP1073AN-3.3 is usually 5 days.
3.What payment methods are accepted for ADP1073AN-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1073AN-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1073AN-3.3?
ADP1073AN-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1073AN-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 ADP1073AN-3.3?
For technical support, including ADP1073AN-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1073AN-3.3 requirements.
6.How does Aetrix verify that ADP1073AN-3.3 is sourced from the original manufacturer or authorized distributors?
All ADP1073AN-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 ADP1073AN-3.3 meets industry standards.
7.What is the process for return or replacement of ADP1073AN-3.3?
All ADP1073AN-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1073AN-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 ADP1073AN-3.3 part is unused and in its original packaging.
Return procedure for ADP1073AN-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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