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Analog Devices Inc. ADP1110AN
- Part No.:
- ADP1110AN
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1110AN.pdf
- Description:
- IC REG BUCK BOOST ADJ 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
ADP1110AN from Analog Devices is a micropower step-up/step-down switching regulator in 8-lead PDIP package, supporting input voltages from 1.0 V to 30 V, adjustable output voltage, 70 kHz switching frequency, and 300 µA quiescent current - used in single-cell battery-powered instruments and portable laser diode drivers.
For engineers reviewing the ADP1110AN datasheet, ADP1110AN pinout, ADP1110AN application, or ADP1110AN equivalent, key selection factors include its dual-mode topology, low-voltage start-up capability (1.0 V), user-adjustable current limiting via ILIM pin, reverse-battery protection up to −1.6 V, and fixed/adjustable output variants within the same family.
Technical Context
The ADP1110AN operates in either step-up or step-down mode depending on external component configuration and input/output relationship; it uses an internal 70 kHz oscillator and integrated power switches SW1/SW2 with saturation voltages specified down to 300 mV at 400 mA.
Its feedback loop employs a 1.245 V internal reference and error amplifier (A2) with gain of 1000–5000 V/V; the A0 pin serves as auxiliary output for low-battery detection or linear regulation, while the comparator monitors FB pin with 210–230 mV trip point and 4–8 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.0 V to 30 V - enables operation from single alkaline/NiMH cell up to industrial supply rails |
| Quiescent Current | 300 µA - extends battery life in always-on portable instrumentation |
| Switching Frequency | 52–90 kHz (typ. 70 kHz) - allows use of compact surface-mount inductors and capacitors |
| Output Sense Voltage | Adjustable via external resistor divider - supports custom regulated outputs beyond fixed 5 V/12 V versions |
| Current Limit Threshold | Set by resistor between ILIM and VIN - enables programmable overcurrent protection from ~400 mA |
| Reverse Battery Protection | Withstands −1.6 V applied to GND/SW2 - prevents damage during battery insertion errors |
| Reference Voltage | 1.245 V ±0.5% - provides stable feedback reference for precision output regulation |
Pinout & Package
ADP1110AN is housed in an 8-lead plastic DIP (PDIP) package (N-8 outline), with thermal resistance θJA = 130°C/W and maximum junction temperature TJMAX = 90°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Auxiliary amplifier output | Provides low-battery detection signal or linear regulation path; sinks 300 µA with <0.4 V drop |
| ILIM | Current limit programming node | Resistor-connected pin sets peak switch current threshold (~400 mA typical) |
| SW1 | Main power switch collector | High-side NPN switch output; rated for 1 A peak in step-down mode |
| GND | Power and signal ground reference | Common return for all internal circuits and external components |
| VIN | Main input supply connection | Accepts 1.0–30 V; powers internal bias and drives ILIM resistor network |
| SW2 | Secondary power switch emitter | Low-side switch terminal; forms boost/SEPIC path with SW1 and external inductor |
| FB (SENSE) | Feedback input for output regulation | Compares divided output against 1.245 V reference; bias current <150 nA |
| SET | Reference bias and gain control | Sets error amplifier operating point; bias current 100–300 nA at VREF |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode topology (step-up/step-down) | Single IC supports buck or boost conversion without external topology change - reduces BOM count in multi-rail portable designs |
| User-adjustable current limiting | Resistor-programmable overcurrent threshold enables tailored protection for diverse loads (e.g., laser diodes, sensors) |
| Low-voltage start-up (1.0 V) | Operates from nearly-dead single-cell batteries - critical for handheld inventory scanners and remote sensors |
| Integrated reverse-battery protection | Guaranteed survival at −1.6 V on GND/SW2 pins - eliminates need for external blocking diode in consumer devices |
| Auxiliary gain amplifier (A0) | Configurable as low-battery detector or linear post-regulator - adds system-level monitoring without extra ICs |
Applications
| Cellular Telephones | Laptop and Palmtop Computers |
|---|---|
Use Scenario: Power management in legacy GSM handsets using single NiCd/NiMH cell. IC Role / Device Role / Timing Role: Step-up regulator generating stable 5 V rail for RF front-end and baseband ICs. Use Value: Enables full functionality down to 1.0 V cell voltage, extending talk time by >15% versus higher-VIN regulators. | Use Scenario: Auxiliary voltage rail generation in compact palmtop systems with space-constrained PCB layout. IC Role / Device Role / Timing Role: Step-down converter supplying 3.3 V logic rail from main 5 V or 12 V battery bus. Use Value: 300 µA quiescent current minimizes standby drain, supporting weeks of sleep-mode operation. |
| Cameras | Laser Diode Drivers |
Use Scenario: Flash capacitor charging and sensor biasing in digital still cameras powered by AA/AAA cells. IC Role / Device Role / Timing Role: Step-up regulator delivering 12 V for flash tube trigger circuitry. Use Value: 70 kHz switching allows use of miniature 10 µH inductors, reducing board area by >30% vs. 100 kHz+ alternatives. | Use Scenario: Precision current source for red/blue laser diodes in barcode scanners and optical alignment tools. IC Role / Device Role / Timing Role: Adjustable-output step-down regulator feeding external current-sense op-amp stage. Use Value: Resistor-programmable current limit protects diodes during transient load events without sacrificing regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX630CPA+ | Fixed 5 V output only; no adjustable version; 100 kHz switching; 120 µA IQ | Lacks step-up/step-down flexibility and ILIM programming; suited only for fixed-rail, ultra-low-IQ needs | Select when lowest possible quiescent current is prioritized over topology flexibility |
| TPS63001DRCR | Buck-boost architecture with 96% efficiency; 2.5–5.5 V input; 3.3/5 V fixed outputs; 2.5 MHz switching | Higher efficiency and frequency but requires minimum 2.5 V input - cannot start from 1.0 V single cell | Select for modern Li-ion systems where high efficiency and small magnetics outweigh low-VIN capability |
Compared with MAX630CPA+ and TPS63001DRCR, the ADP1110AN uniquely supports sub-1.5 V start-up and dual-mode operation in a through-hole package - making it irreplaceable in legacy single-cell industrial handhelds where PCB rework is prohibited.
Availability
ADP1110AN is available at Aetrix Electronics and suitable for cellular telephones, portable instruments, and laser diode drivers requiring stable component supply across extended product lifecycles.
Supply support for ADP1110AN 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, communications, automotive, and consumer markets.
The ADP1110AN belongs to Analog Devices' micropower DC/DC converter product line, designed specifically for battery-powered portable equipment needing wide input range, low IQ, and robust protection features.
FAQ
What is the minimum input voltage required for ADP1110AN to start switching?
The ADP1110AN starts switching at an input voltage as low as 1.0 V, verified across temperature and process corners. This capability allows the ADP1110AN to operate from nearly depleted single-cell alkaline or NiMH batteries, making it ideal for long-life portable instrumentation where energy harvesting or ultra-low-power wake-up is critical.
Can ADP1110AN be used in step-up mode with a 1.5 V input to generate 5 V output?
Yes, the ADP1110AN supports step-up operation from 1.5 V input to 5 V output, confirmed in the functional block diagram and electrical specifications. Its internal 70 kHz oscillator and low-saturation switches enable efficient boost conversion at light-to-moderate loads, though efficiency drops above 300 mA due to fixed-frequency architecture limitations.
How is output voltage adjusted on the ADP1110AN?
The ADP1110AN uses a resistor divider from output to FB pin and from FB to GND to set output voltage based on the internal 1.245 V reference. The formula is VOUT = 1.245 × (1 + R1/R2). This adjustment method is validated in the General Description and applies directly to the ADP1110AN, unlike fixed-output variants such as ADP1110AN-5.
Does ADP1110AN include built-in reverse-polarity protection?
Yes, the ADP1110AN includes guaranteed reverse-battery protection: it withstands continuous −1.6 V applied to GND and SW2 pins while other pins are grounded. This feature is explicitly tested and specified in the datasheet Notes section, eliminating the need for external series diodes in consumer handheld designs using the ADP1110AN.
What is the thermal performance of ADP1110AN in PDIP package?
The ADP1110AN in 8-lead PDIP (N-8) package has θJA = 130°C/W and TJMAX = 90°C. Under typical 500 mW dissipation, junction temperature rise is ~65°C above ambient - confirming safe operation at room temperature with minimal heatsinking. This thermal rating is documented in the Pin Configurations section of the ADP1110AN datasheet.
ADP1110AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP1110
- 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):
- 1.245V
- Voltage - Output (Max):
- 30V
- Current - Output:
- -
- Frequency - Switching:
- 70kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1110AN FAQ
1.How can I place an order for ADP1110AN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1110AN 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 ADP1110AN reliable?
The price and inventory of ADP1110AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1110AN is usually 5 days.
3.What payment methods are accepted for ADP1110AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1110AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1110AN?
ADP1110AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1110AN 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 ADP1110AN?
For technical support, including ADP1110AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1110AN requirements.
6.How does Aetrix verify that ADP1110AN is sourced from the original manufacturer or authorized distributors?
All ADP1110AN 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 ADP1110AN meets industry standards.
7.What is the process for return or replacement of ADP1110AN?
All ADP1110AN units undergo pre-shipment inspection (PSI). If there is an issue with ADP1110AN, 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 ADP1110AN part is unused and in its original packaging.
Return procedure for ADP1110AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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