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Analog Devices Inc. ADP3000AR-12
- Part No.:
- ADP3000AR-12
- Manufacturer:
- Analog Devices Inc.
- Package:
- -
- Datasheet:
-
ADP3000AR-12.pdf
- Description:
- IC REG STEP UP/DWN 12V 8-SOIC
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Inventory:589
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Product details
Overview
ADP3000AR-12 from Analog Devices is a micropower step-up/step-down switching regulator with fixed 12 V output, operating from 2 V to 30 V input, delivering up to 50 mA at 12 V in step-up mode (e.g., 4.5–5.5 V input), featuring 400 kHz switching frequency, on-chip low-battery detector, and user-adjustable current limit. It enables compact DC/DC conversion in space-constrained portable power rails.
For engineers reviewing the ADP3000AR-12 datasheet, ADP3000AR-12 pinout, ADP3000AR-12 application, or ADP3000AR-12 equivalent, key selection criteria include input voltage range compatibility (2–30 V), fixed 12 V output tolerance (±5%), quiescent current (500 µA), thermal performance in SOIC-8 (θJA = 120°C/W), and step-up/step-down topology flexibility for battery-powered systems.
Technical Context
The ADP3000AR-12 uses pulse-frequency modulation (PFM) with a gated 400 kHz oscillator and internal 1.245 V reference to regulate output via feedback sensing. Its dual-mode operation supports both boost (VIN = 2–12.6 V → VOUT = 12 V) and buck (VIN = 2–30 V → VOUT = 12 V) configurations using external inductor/diode networks connected to SW1 and SW2 pins.
It integrates an auxiliary gain block (open-collector AO output, 300 µA sink capability) usable as low-battery detector or error amplifier, and a programmable current-limit circuit tied to ILIM pin - enabling precise switch-current control (e.g., 400 mA default with 220 Ω resistor) without external sense resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.00 V ±5% (11.4–12.6 V), laser-trimmed internal divider eliminates external feedback resistors. |
| Input Voltage Range | 2.0–12.6 V in step-up mode; 2.0–30.0 V in step-down mode - supports wide battery input including Li-ion, alkaline, and industrial rails. |
| Switching Frequency | 400 kHz typical (350–450 kHz) - enables use of small inductors (e.g., 15 µH Sumida CR54-150) and low-ESR capacitors. |
| Quiescent Current | 500 µA shutdown current - critical for micropower operation in always-on or standby battery systems. |
| Output Current Capability | 50 mA at 12 V from 4.5–5.5 V input (step-up); higher in step-down depending on thermal limits and layout. |
| Current Limit | Programmable up to 1.5 A (ILIM tied to VIN); 400 mA with 220 Ω resistor - protects external components and ensures stable transient response. |
| Operating Temperature | 0°C to +70°C ambient - validated for commercial portable electronics applications without derating. |
Pinout & Package
ADP3000AR-12 is supplied in an 8-lead SOIC (R-8) package with standard JEDEC MS-012AA outline (4.90 × 3.90 × 1.75 mm), optimized for thermal dissipation (θJA = 120°C/W) and PCB area efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM | Current limit programming input | Connect to VIN for max 1.5 A switch current; add 220 Ω resistor to VIN for 400 mA limit - sets peak inductor current and prevents saturation. |
| VIN | Main power input | Supplies internal circuitry and powers the high-side switch; accepts 2–30 V across step-up/step-down modes. |
| SW1 | Power switch collector | In step-up: drives inductor; in step-down: connects to input rail - requires Schottky diode (e.g., 1N5817) and proper layout for EMI control. |
| SW2 | Power switch emitter | In step-up: connects to GND; in step-down: drives inductor - must not go >0.35 V below GND to avoid damage. |
| FB (SENSE) | Feedback input / fixed-voltage sense | Internally tied to laser-trimmed resistor divider for 12 V regulation - connect directly to output for closed-loop stability. |
| GND | Analog and power ground | Common return for all internal blocks; requires low-impedance PCB plane to minimize noise coupling into FB and SET pins. |
| SET | Auxiliary gain amplifier non-inverting input | Accepts external resistor divider for low-battery detection or error amplification - bias current ≤400 nA minimizes divider loading. |
| AO | Auxiliary gain amplifier open-collector output | Sinks ≥300 µA; used for battery-low flag or post-regulation control - requires external pull-up to logic supply. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode topology support | Single IC implements both step-up (boost) and step-down (buck) conversion - reduces BOM count and design complexity for multi-rail systems. |
| Integrated low-battery detector | Auxiliary gain block (SET/AO pins) provides configurable undervoltage lockout without external comparators - saves board space and power. |
| Micropower PFM operation | 500 µA quiescent current in shutdown - extends battery life in always-on monitoring or sleep-mode applications. |
| High-frequency switching | 400 kHz operation allows <15 µH inductors and <220 µF low-ESR tantalum capacitors - enables compact, low-profile power solutions. |
| Robust current limiting | On-chip cycle-by-cycle current limit with <0.3 µs response - prevents inductor saturation and MOSFET overstress during load transients. |
Applications
| Portable Instrument Power | Cellular Baseband Supply |
|---|---|
Use Scenario: Powering analog front-end and microcontroller in handheld multimeters or gas detectors from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Step-up regulator generating stable 12 V bias for op-amps, ADC references, and display drivers. Use Value: Enables full functionality across battery discharge curve without external supervision; 50 mA output sustains sensor excitation and signal conditioning. |
Use Scenario: Providing regulated 12 V rail for RF power amplifier bias in legacy 2G/3G cellular handsets. IC Role / Device Role / Timing Role: High-efficiency boost converter operating from 3.4–4.2 V battery to deliver clean 12 V with minimal ripple. Use Value: Replaces discrete charge-pump solutions with better PSRR and lower EMI - improves transmit linearity and reduces thermal load. |
| Hard Disk Drive Actuator | Paging System Audio Amplifier |
Use Scenario: Generating 12 V for voice coil motor (VCM) driver in 2.5″ HDDs powered by 5 V system rail. IC Role / Device Role / Timing Role: Step-down regulator converting 5 V to 12 V (inverting configuration per Fig. 33) for actuator coil drive. Use Value: Delivers 100 mA at −12 V with 60% typical efficiency - replaces transformer-based inverters with smaller footprint and no magnetic coupling. |
Use Scenario: Supplying 12 V audio power amplifier stage in alphanumeric pagers with alkaline battery input (4.5–6.0 V). IC Role / Device Role / Timing Role: Fixed-output boost converter powering Class AB amplifier with fast transient response. Use Value: Maintains consistent audio output amplitude over battery life; 400 kHz switching avoids audible beat frequencies in speaker output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1931IS5-12#TRMPBF | Fixed 12 V, 1.2 MHz switching, 1.2 A switch current, SOT-23-5 package. | Higher frequency enables smaller magnetics but increases EMI sensitivity; lacks integrated gain block and dual-mode flexibility. | Preferred when board space is extremely limited and 1.2 A output is required; not suitable for step-down or low-battery detection functions. |
| TPS61040DRVR | Adjustable output (1.8–28 V), 600 kHz, 400 mA switch current, 6-pin WSON package. | No fixed 12 V variant; requires external feedback resistors; no AO/SET gain block; higher quiescent current (50 µA active, 1 µA shutdown). | Chosen when output voltage flexibility or ultra-low shutdown current is prioritized over integrated features like low-battery detection. |
Compared with LT1931IS5-12#TRMPBF and TPS61040DRVR, the ADP3000AR-12 uniquely combines fixed 12 V output, dual-mode topology, on-chip gain block, and micropower PFM operation - making it optimal for cost-sensitive, feature-rich portable systems requiring both regulation and system monitoring in one device.
Availability
ADP3000AR-12 is available at Aetrix Electronics and suitable for portable instruments, cellular baseband supplies, hard disk drive actuators, and paging system audio amplifiers requiring stable component supply and long-term obsolescence management.
Supply support for ADP3000AR-12 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 consumer markets since 1965.
The ADP3000AR-12 belongs to Analog Devices' micropower DC/DC converter product line, designed specifically for battery-operated portable electronics where efficiency, small size, and integrated system functions (e.g., low-battery detection) are critical.
FAQ
What is the maximum output current of the ADP3000AR-12 in step-up mode?
The ADP3000AR-12 delivers up to 50 mA at 12 V when stepping up from a 4.5–5.5 V input, as verified in Figure 30 of the datasheet. Output current is thermally limited by package (SOIC-8, θJA = 120°C/W) and external component selection - higher currents require careful thermal design and may reduce efficiency or reliability.
Does the ADP3000AR-12 support step-down operation to generate 12 V?
Yes, the ADP3000AR-12 supports step-down mode with input voltages up to 30 V, enabling 12 V output from higher-voltage sources such as industrial 24 V rails. In this configuration, SW1 connects to VIN and SW2 drives the inductor - full implementation details are provided in Figure 3 and Figure 31 of the datasheet.
How is the 12 V output accuracy specified for the ADP3000AR-12?
The ADP3000AR-12 guarantees a 12.00 V output with ±5% tolerance (11.40–12.60 V) over temperature (0°C to +70°C) and line/load conditions, per Table 1 in the datasheet. This accuracy is achieved via laser-trimmed internal resistive feedback, eliminating external resistor errors and drift.
Can the ADP3000AR-12 be used to generate negative output voltages?
Yes - the ADP3000AR-12 can be configured as an inverting converter (e.g., +5 V to −5 V) using standard buck-boost topology, as shown in Figure 33. While the ADP3000AR-12 itself is fixed at +12 V, the base ADP3000 architecture supports inversion; however, the AR-12 variant's internal divider is optimized for positive 12 V only.
What is the purpose of the AO and SET pins on the ADP3000AR-12?
The AO (auxiliary output) and SET (auxiliary input) pins form an uncommitted gain block with 1.245 V internal reference. On the ADP3000AR-12, they enable low-battery detection, undervoltage lockout, or error amplification - for example, connecting a resistor divider from VIN to GND at SET causes AO to sink current when battery voltage drops below a set threshold.
ADP3000AR-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
- -
ADP3000AR-12 FAQ
1.How can I place an order for ADP3000AR-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3000AR-12 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 ADP3000AR-12 reliable?
The price and inventory of ADP3000AR-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3000AR-12 is usually 5 days.
3.What payment methods are accepted for ADP3000AR-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3000AR-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3000AR-12?
ADP3000AR-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3000AR-12 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 ADP3000AR-12?
For technical support, including ADP3000AR-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3000AR-12 requirements.
6.How does Aetrix verify that ADP3000AR-12 is sourced from the original manufacturer or authorized distributors?
All ADP3000AR-12 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 ADP3000AR-12 meets industry standards.
7.What is the process for return or replacement of ADP3000AR-12?
All ADP3000AR-12 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3000AR-12, 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 ADP3000AR-12 part is unused and in its original packaging.
Return procedure for ADP3000AR-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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