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Analog Devices Inc. ADP1110AR
- Part No.:
- ADP1110AR
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1110AR.pdf
- Description:
- IC REG BUCK BOOST ADJ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,016
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Product details
Overview
ADP1110AR from Analog Devices is a micropower step-up/step-down switching regulator with adjustable output voltage, operating from 1.0 V to 30 V input, delivering up to 500 mA in step-down mode and supporting 70 kHz fixed-frequency operation with 300 µA quiescent current - used in single-cell battery-powered portable instruments and laser diode drivers.
For engineers reviewing the ADP1110AR datasheet, ADP1110AR pinout, ADP1110AR application, or ADP1110AR equivalent, key selection factors include its dual-mode topology, user-adjustable current limiting via ILIM pin, low-battery detection capability using A0 amplifier, reverse-battery protection up to –1.6 V, and SO-8 package compatibility with space-constrained handheld designs.
Technical Context
The ADP1110AR implements a dual-switch (SW1/SW2) synchronous buck-boost architecture with internal oscillator and error amplifier (A2), enabling seamless transition between step-up and step-down modes depending on VIN relative to VOUT. Its comparator-based control loop uses a 1.245 V reference and 220 mV typical trip point for low-battery sensing.
It integrates battery protection circuitry limiting reverse current to ≤750 mA at –1.6 V applied to GND/SW2, and features a gain block (A0) configurable as linear regulator or detector. The SET pin sets current limit threshold, while FB pin senses output voltage with 70–150 nA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.0 V to 30 V - supports single-cell alkaline/NiMH (1.0–1.5 V) and higher-voltage backup rails without external level-shifting. |
| Quiescent Current | 300 µA - enables multi-year battery life in always-on remote sensors or pagers. |
| Oscillator Frequency | 52–90 kHz (typ. 70 kHz) - allows use of low-cost, non-high-frequency ceramic capacitors and shielded inductors. |
| Output Sense Voltage | 1.245 V reference at FB pin - sets regulated output via external resistor divider; enables precise adjustable VOUT from 1.25 V upward. |
| Switch Saturation Voltage | 300–750 mV (depending on VIN & load) - determines conduction loss and thermal rise under full load in step-down mode. |
| Comparator Trip Point | 210–230 mV - defines low-battery detection threshold when used with A0 amplifier and external resistive divider. |
| Reverse Battery Current Limit | 750 mA - ensures safe operation during accidental battery reversal in consumer handhelds. |
Pinout & Package
ADP1110AR is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC footprint, thermal resistance θJA = 150°C/W, and maximum junction temperature of 90°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Auxiliary amplifier output | Configurable as low-battery detector output or linear regulator driver; sinks up to 300 µA with <0.4 V saturation. |
| ILIM | Current limit programming input | Resistor-connected pin setting peak switch current; 220 Ω yields ~400 mA limit. |
| SW1 | Main switch collector (NPN) | High-side switching node; rated for –400 mV undershoot during turn-off; connects to inductor and diode/capacitor network. |
| GND | Power and signal ground reference | Common return for all internal circuits; must be low-impedance connection to minimize noise coupling into FB/SET pins. |
| VIN | Main power input | Accepts 1.0–30 V; supplies internal bias and drives switching stage; reverse-battery tolerant up to –1.6 V when SW2/GND grounded. |
| SW2 | Secondary switch emitter (NPN) | Low-side switching node; tied to GND in step-down mode; forms boost path with SW1 in step-up configuration. |
| FB (SENSE) | Feedback input | Monitors output via resistor divider; 70–150 nA bias current requires high-value resistors to avoid loading error. |
| SET | Reference bias and gain control | Sets internal reference and amplifier gain; 100–300 nA bias current affects accuracy of current limit and regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode topology (buck-boost) | Enables single-regulator solution across input voltages both below and above target VOUT - eliminates need for separate boost/buck ICs in variable-source systems. |
| User-adjustable current limit | Allows precise overcurrent protection tuning via external resistor on ILIM pin - critical for safeguarding Li-ion cells and laser diodes. |
| Integrated low-battery detector | Uses A0 amplifier and internal 220 mV comparator threshold to trigger system shutdown before cell depletion - reduces firmware dependency. |
| Reverse battery protection | Guarantees safe operation with –1.6 V applied to GND/SW2 pins while other pins are grounded - prevents damage during field battery swaps. |
| Micropower operation (300 µA IQ) | Minimizes standby drain in always-on devices like inventory scanners - extends shelf life and operational runtime per charge. |
Applications
| Single-Cell to 5 V Converters | Laser Diode Drivers |
|---|---|
Use Scenario: Powering 5 V logic and analog circuitry from a single 1.5 V alkaline or NiMH cell in handheld test equipment. IC Role / Device Role / Timing Role: Step-up switching regulator providing stable 5 V output with ±2.5% regulation tolerance and 70 kHz switching frequency. Use Value: Eliminates need for two-cell stacks or external DC-DC modules, reducing BOM count and PCB area by >30%. | Use Scenario: Driving constant-current laser diodes requiring tightly regulated bias in portable barcode scanners. IC Role / Device Role / Timing Role: Adjustable-output buck-boost controller with programmable current limit and low-noise feedback path. Use Value: Enables direct current-mode control via ILIM pin, avoiding external sense amplifiers and improving optical stability under battery voltage sag. |
| Battery Backup Supplies | Hand-Held Inventory Computers |
Use Scenario: Maintaining real-time clock and SRAM retention during main power failure in industrial controllers. IC Role / Device Role / Timing Role: Low-quiescent-current step-down regulator sourcing from backup supercapacitor or coin cell. Use Value: 300 µA IQ extends 220 mF supercap lifetime to >72 hours after main power loss - meets IEC 62368 hold-up requirements. | Use Scenario: Power management in ruggedized warehouse scanners operating on replaceable AA batteries. IC Role / Device Role / Timing Role: Dual-mode regulator adapting to declining battery voltage (1.5 V → 0.9 V) while sustaining 3.3 V/5 V system rails. Use Value: Extends usable battery capacity by 22% compared to fixed-step-up solutions, delaying end-of-life voltage dropouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1722x series (e.g., MAX17222) | Higher efficiency (92% vs. ~85%), 2 MHz switching, but only step-up; no step-down mode or reverse-battery rating. | Best for ultra-low-IQ (300 nA) boost-only apps; unsuitable where VIN may exceed VOUT or reverse polarity occurs. | Select MAX17222 only if input stays below output and reverse protection is handled externally. |
| TPS630xx series (e.g., TPS63020) | True buck-boost with 96% efficiency, 2.5 MHz, integrated switches, but 2.5 µA IQ and no dedicated low-battery comparator output. | Preferred for high-efficiency portable systems with tight thermal constraints; lacks A0-based hardware shutdown signaling. | Choose TPS63020 when efficiency >88% and compact layout are prioritized over micropower shutdown signaling. |
Compared with MAX17222 and TPS63020, the ADP1110AR uniquely combines micropower operation, dual-mode topology, reverse-battery tolerance, and integrated low-battery detection - making it optimal for cost-sensitive, battery-reversal-prone, single-cell industrial handhelds where firmware-triggered shutdown is not viable.
Availability
ADP1110AR is available at Aetrix Electronics and suitable for single-cell to 5 V converters, laser diode drivers, and battery backup supplies requiring stable component supply and long-term manufacturability assurance.
Supply support for ADP1110AR 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 precision instrumentation, industrial automation, and communications markets since 1965.
The ADP1110AR belongs to Analog Devices' micropower DC-DC converter product line, designed specifically for ultra-low-power, single-cell battery-powered portable equipment where reliability under voltage reversal and minimal standby drain are critical.
FAQ
What is the maximum input voltage supported by the ADP1110AR?
The ADP1110AR supports an input voltage range of 1.0 V to 30 V. In step-down mode, it operates up to 30 V; in step-up mode, the maximum input is 12.6 V per datasheet specifications. Exceeding these limits risks permanent damage or undefined behavior, especially beyond the absolute maximum rating of VIN to GND = –0.3 V to +36 V.
Does the ADP1110AR support true buck-boost operation without external diodes?
Yes, the ADP1110AR implements synchronous buck-boost operation using internal NPN transistors SW1 and SW2, eliminating the need for external diodes in standard configurations. Its functional block diagram confirms dual-switch topology, and the pinout shows SW1 and SW2 as dedicated switching nodes - enabling efficient bidirectional energy transfer without external rectification.
How is the output voltage adjusted on the ADP1110AR?
The ADP1110AR uses the FB (feedback) pin with an external resistor divider to set output voltage. With a 1.245 V internal reference, VOUT = 1.245 × (1 + R1/R2). The SET pin biases the reference and error amplifier; its 100–300 nA bias current must be accounted for in high-precision designs to avoid regulation error.
Can the ADP1110AR be used in reverse-battery scenarios?
Yes - the ADP1110AR is explicitly rated for reverse-battery operation: it withstands continuous –1.6 V applied to GND and SW2 pins while VIN, ILIM, and SW1 remain grounded. This protects against accidental battery insertion reversal in consumer handhelds, a feature not found in most competing buck-boost ICs.
What is the purpose of the A0 pin on the ADP1110AR?
The A0 pin on the ADP1110AR is an auxiliary amplifier output used primarily for low-battery detection. Configured with external resistors, it compares a scaled VIN against the 220 mV comparator threshold and drives a load (e.g., microcontroller GPIO) with <0.4 V saturation at 300 µA sink current - enabling hardware-triggered shutdown without firmware polling.
ADP1110AR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP1110
- 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1110AR FAQ
1.How can I place an order for ADP1110AR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1110AR 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 ADP1110AR reliable?
The price and inventory of ADP1110AR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1110AR is usually 5 days.
3.What payment methods are accepted for ADP1110AR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1110AR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1110AR?
ADP1110AR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1110AR 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 ADP1110AR?
For technical support, including ADP1110AR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1110AR requirements.
6.How does Aetrix verify that ADP1110AR is sourced from the original manufacturer or authorized distributors?
All ADP1110AR 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 ADP1110AR meets industry standards.
7.What is the process for return or replacement of ADP1110AR?
All ADP1110AR units undergo pre-shipment inspection (PSI). If there is an issue with ADP1110AR, 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 ADP1110AR part is unused and in its original packaging.
Return procedure for ADP1110AR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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