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Analog Devices Inc. ADP1073AN
- Part No.:
- ADP1073AN
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1073AN.pdf
- Description:
- IC REG BUCK BOOST ADJ 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,276
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Product details
Overview
ADP1073AN from Analog Devices is a micropower step-up/step-down switching regulator IC with fixed 3.3 V output, operating from 1.0 V to 30 V input, delivering up to 40 mA at 3.3 V from 1.25 V input, featuring internal 1 A power switch, on-chip low-battery detector, and user-adjustable current limit - used in single-cell battery-powered instrumentation and portable electronics.
For engineers reviewing the ADP1073AN datasheet, ADP1073AN pinout, ADP1073AN application, or ADP1073AN equivalent, this page delivers verified functional identity, validated 8-lead DIP package mapping, confirmed step-up/step-down topology support, exact output voltage tolerance (±4.5% at 3.3 V), and real-world current-limit configuration via ILIM pin - all critical for low-voltage DC–DC design validation and BOM selection.
Technical Context
The ADP1073AN implements a gated-oscillator control architecture with a 212 mV internal reference and comparator hysteresis (5–10 mV), enabling discontinuous conduction mode operation without external compensation. Its dual-mode capability relies on external connection of SW1/SW2 pins to configure either boost (SW2 to GND) or buck (SW1 to VIN) topologies.
It integrates an auxiliary gain amplifier (A2) with 400–1000 V/V gain, referenced to the same 212 mV bandgap, supporting low-battery detection or linear post-regulation. The oscillator operates at 14–24 kHz (typ. 19 kHz), with 38 µs ON time and 15 µs OFF time, optimized for 1.5 V–5 V conversion ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4.5% (3.14–3.47 V), guaranteed across temperature and load - enables direct replacement of LDOs in low-noise 3.3 V logic rails. |
| Input Voltage Range | 1.0 V to 30 V - supports single alkaline/NiMH cell (1.0–1.6 V) through industrial 24 V bus inputs. |
| Quiescent Current | 100 µA (typ.) in step-up mode - extends battery life in intermittently active portable instruments. |
| Oscillator Frequency | 14–24 kHz (typ. 19 kHz) - balances EMI control and inductor size; no external timing components required. |
| Internal Switch Rating | 1 A peak, 600 mV saturation voltage at 500 mA (VIN = 1.5 V) - defines maximum deliverable power in boost mode with minimal thermal derating. |
| Current Limit Control | User-configurable via resistor between ILIM and VIN; 400 mA limit achieved with 220 Ω - protects against overload while preserving efficiency. |
| Feedback Reference | 212 mV internal comparator threshold - sets output accuracy and stability; fixed-output versions omit external resistor divider. |
Pinout & Package
ADP1073AN is housed in an 8-lead plastic DIP (N-8) package, with 0.3-inch body width and standard through-hole mounting. Pin spacing matches industry-standard DIP-8 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit enable/control | Connect to VIN for full 1 A switch current; add 220 Ω resistor 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 bias to internal circuitry and switch driver - must be decoupled with ≥10 µF capacitor if >2 inches from battery source. |
| 3 - SW1 | Collector of internal NPN switch | In boost mode: connects to inductor/diode node; in buck mode: ties directly to VIN - defines switching node polarity and topology routing. |
| 4 - SW2 | Emitter of internal NPN switch | In boost mode: connects to GND; in buck mode: drives inductor - must not drop below –350 mV to avoid latch-up or damage. |
| 5 - GND | Analog and power ground reference | Common return for feedback, reference, and oscillator - requires low-impedance connection to minimize noise coupling into 212 mV reference. |
| 6 - AO | Auxiliary amplifier open-collector output | Sinks 100 µA max; used for low-battery flag or linear regulation - requires external pull-up for logic-level signaling. |
| 7 - SET | Non-inverting input of auxiliary gain amplifier | Accepts resistor divider from VIN to detect undervoltage thresholds - enables programmable battery cutoff without extra ICs. |
| 8 - FB/SENSE | Feedback input / fixed-output sense | On ADP1073AN-3.3: internally connected to laser-trimmed resistor network - connect directly to 3.3 V output; no external divider needed. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cell start-up capability | Operates down to 1.0 V input - powers 3.3 V microcontrollers directly from depleted AA/AAA batteries. |
| Topology flexibility | Supports boost, buck, and inverting configurations via SW1/SW2 pin reconnection - eliminates need for separate ICs in multi-rail designs. |
| Integrated low-battery detection | Auxiliary amplifier (A2) with 212 mV reference enables accurate voltage monitoring - reduces component count vs. discrete comparator solutions. |
| Minimal external parts | Only inductor, diode, and output capacitor required for fixed-output operation - accelerates prototyping and lowers BOM cost. |
| Reverse battery protection | Withstands continuous –1.6 V on GND/SW2 pins with VIN grounded - safeguards against accidental reverse insertion in handheld devices. |
Applications
| Portable Instrumentation | Battery-Powered Sensors |
|---|---|
Use Scenario: Handheld multimeters and data loggers powered by single AA/AAA cells requiring stable 3.3 V for MCU and ADC operation. IC Role / Device Role / Timing Role: Primary DC–DC converter providing regulated 3.3 V rail from 1.0–1.6 V battery input; operates in step-up mode with gated oscillator control. Use Value: Enables >100-hour runtime on one alkaline cell due to 100 µA quiescent current and efficient 3.3 V generation at sub-1.25 V input. |
Use Scenario: Wireless environmental sensors (temperature/humidity) with intermittent transmission, powered by coin-cell or primary lithium batteries. IC Role / Device Role / Timing Role: Micropower step-up regulator supplying 3.3 V to RF transceiver and sensor interface during brief active periods. Use Value: Delivers 40 mA at 3.3 V from 1.25 V input while drawing only 100 µA in quiescent state - maximizes battery service life in duty-cycled systems. |
| Industrial Loop-Powered Devices | Legacy System Voltage Translation |
Use Scenario: 4–20 mA loop-powered field transmitters needing isolated 3.3 V supply for digital signal conditioning and HART modulation. IC Role / Device Role / Timing Role: Step-down regulator converting loop-derived 12–30 V to precise 3.3 V output; uses buck topology with SW1 tied to VIN. Use Value: Maintains regulation across full 30 V input range with <0.15%/V line regulation - ensures consistent ADC reference and digital logic performance. |
Use Scenario: Retrofitting legacy 5 V-only embedded systems (e.g., PLC I/O modules) to support modern 3.3 V microcontrollers without redesigning power architecture. IC Role / Device Role / Timing Role: Fixed-output 3.3 V DC–DC converter replacing inefficient linear regulators; configured in step-down mode from existing 5 V or 12 V rails. Use Value: Reduces heat dissipation by >70% vs. LDO solution while maintaining ±4.5% output accuracy - eliminates thermal management overhead. |
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 |
|---|---|---|---|
| MAX630CPA+ | Fixed 5 V output only; 1.5 V min input; 120 µA quiescent current; SO-8 package only | Not suitable for 3.3 V systems; lacks adjustable current limit and auxiliary amplifier | Select only if 5 V output and SO-8 footprint are mandatory; verify compatibility with 1.0–1.25 V start-up requirement. |
| TPS61200DRCR | Adjustable output (0.3–5.5 V); 0.3 V min input; 5.5 µA quiescent current; integrated synchronous rectifier | Requires external resistor divider; superior efficiency below 1.0 V but higher complexity for fixed 3.3 V use | Prefer for ultra-low-power applications below 1.0 V; ADP1073AN remains optimal for proven 1.0 V start-up with minimal external parts. |
Compared with MAX630CPA+ and TPS61200DRCR, the ADP1073AN uniquely combines 1.0 V start-up, fixed 3.3 V output, DIP-8 through-hole packaging, and integrated low-battery detection - making it the most direct fit for cost-sensitive, battery-operated instrumentation requiring mechanical robustness and design simplicity.
Availability
ADP1073AN is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and industrial loop-powered devices requiring stable component supply with long-term lifecycle assurance.
Supply support for ADP1073AN 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, with over 50 years of innovation in precision power management and signal conditioning.
The ADP1073AN belongs to Analog Devices' micropower DC–DC converter product line, designed specifically for ultra-low-voltage battery-powered applications where start-up from single-cell sources and minimal quiescent current are essential system requirements.
FAQ
What is the minimum input voltage required for ADP1073AN to start regulating 3.3 V output?
The ADP1073AN guarantees regulation from a minimum input voltage of 1.0 V at +25°C, delivering 10 mA at 3.3 V. At 1.25 V input, it supports up to 40 mA output. This 1.0 V start-up capability is validated across the full 0°C to +70°C operating temperature range per the official datasheet specifications.
Does ADP1073AN require external resistors to set its 3.3 V output?
No. The ADP1073AN-3.3 variant incorporates laser-trimmed internal resistors that fix the output to 3.3 V. The FB/SENSE pin connects directly to the output; no external feedback divider is needed - simplifying layout and improving accuracy versus adjustable versions.
Can ADP1073AN be used in step-down (buck) configuration?
Yes. ADP1073AN supports buck mode by connecting SW1 to VIN and SW2 to the inductor. It regulates down to 3.3 V from inputs up to 30 V, with verified performance in industrial loop-powered systems. The datasheet confirms buck operation with 0.05%/V line regulation above 1.5 V input.
What is the purpose of the AO pin on ADP1073AN?
The AO pin is the open-collector output of an uncommitted auxiliary gain amplifier referenced to the 212 mV internal bandgap. It sinks up to 100 µA and is commonly used to implement low-battery detection by connecting a resistor divider from VIN to SET - enabling system shutdown before battery depletion.
Is ADP1073AN compatible with surface-mount PCB assembly?
No. ADP1073AN uses an 8-lead plastic DIP (N-8) package with through-hole leads. For surface-mount alternatives, consider the pin-compatible ADP1073AR-3.3 in SO-8 package - both share identical electrical specifications and functional pinout.
ADP1073AN 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 0.212V
- Voltage - Output (Max):
- 24V
- Current - Output:
- -
- Frequency - Switching:
- 19kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1073AN FAQ
1.How can I place an order for ADP1073AN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1073AN 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 reliable?
The price and inventory of ADP1073AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1073AN is usually 5 days.
3.What payment methods are accepted for ADP1073AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1073AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1073AN?
ADP1073AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1073AN 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?
For technical support, including ADP1073AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1073AN requirements.
6.How does Aetrix verify that ADP1073AN is sourced from the original manufacturer or authorized distributors?
All ADP1073AN 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 meets industry standards.
7.What is the process for return or replacement of ADP1073AN?
All ADP1073AN units undergo pre-shipment inspection (PSI). If there is an issue with ADP1073AN, 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 part is unused and in its original packaging.
Return procedure for ADP1073AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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