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Analog Devices Inc. ADP2301AUJZ-R2
- Part No.:
- ADP2301AUJZ-R2
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
ADP2301AUJZ-R2.pdf
- Description:
- IC REG BUCK ADJ 1.2A TSOT6
- Quantity:
- Payment:
- Shipping:
Inventory:305
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Product details
Overview
ADP2301AUJZ-R2 from Analog Devices is a nonsynchronous step-down dc-dc regulator with integrated high-side MOSFET, 1.4 MHz switching frequency, ±2% output voltage accuracy over −40°C to +125°C, and 1.2 A load capability. It operates from 3.0 V to 20 V input and delivers regulated output as low as 0.8 V-used in intermediate power rail conversion for communications and industrial systems.
For engineers reviewing the ADP2301AUJZ-R2 datasheet, ADP2301AUJZ-R2 pinout, ADP2301AUJZ-R2 application, or ADP2301AUJZ-R2 equivalent, key selection factors include its fixed 1.4 MHz operation (vs. ADP2300's 700 kHz), TSOT-6 package footprint, bootstrap-integrated gate drive, and precision enable with 100 mV hysteresis for supply sequencing.
Technical Context
The ADP2301AUJZ-R2 uses peak current-mode PWM control with automatic transition to pulse-skip mode at light loads, enabling high efficiency (up to 91%) across wide load range. Its internal soft start (730 µs), integrated bootstrap diode, and 0.8 V feedback reference support stable startup and low-noise regulation.
It features undervoltage lockout (UVLO) with 2.95 V rising threshold and 2.40 V falling threshold, thermal shutdown at 140°C with 15°C hysteresis, and short-circuit protection via frequency foldback-reducing fSW to ½ fSW when FB drops below 0.6 V and to ¼ fSW at hard shorts (FB ≤ 0.2 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.4 MHz - enables smaller external inductors and capacitors vs. 700 kHz alternatives, reducing solution size. |
| Max Output Current | 1.2 A - supports digital load rails including FPGA I/O, microcontroller cores, and ASIC auxiliary supplies. |
| Input Voltage Range | 3.0 V to 20 V - accommodates 5 V, 12 V, and 19 V input buses without pre-regulation. |
| Feedback Reference | 0.800 V ±0.016 V (−40°C to +125°C) - enables precise output setting down to 0.8 V with standard resistor dividers. |
| Enable Threshold | 1.20 V ±0.07 V with 100 mV hysteresis - allows reliable supply sequencing and programmable UVLO using resistive dividers. |
| Thermal Shutdown | 140°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design; recovery requires junction cooling to ≤125°C. |
| Min On/Off Time | 100 ns / 70 ns - constrains practical VOUT/VIN ratio limits, e.g., ≥0.8 V at 3.3 V input and ≤18.5 V at 20 V input with B230A diode. |
Pinout & Package
ADP2301AUJZ-R2 is housed in a 6-lead, 1.5 mm × 1.5 mm × 0.55 mm ultrasmall TSOT package with exposed pad for thermal performance (θJA = 186°C/W on JEDEC 4-layer board). Pinout is validated per Analog Devices Rev. C datasheet Figure 3 and Table 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side MOSFET gate driver | Requires 0.1 µF X5R/X7R ceramic capacitor between BST and SW; provides ~5.0 V floating bias to ensure full enhancement of integrated MOSFET. |
| GND | Power ground reference | Must connect directly to low-impedance ground plane; serves as return path for switch node current and feedback reference. |
| FB | Output voltage feedback sense input | Monitors resistive divider output; regulates VOUT by maintaining 0.8 V at this pin; high-impedance input (≤0.1 µA bias). |
| EN | Enable/disable control with hysteresis | Pull ≥1.2 V to enable; ≤1.1 V to disable; internal 1.2 µA pull-down prevents floating; supports supply sequencing and programmable UVLO. |
| VIN | Main power input | Accepts 3.0–20 V; requires local 10 µF ceramic bypass capacitor to GND; feeds internal LDO, oscillator, and gate driver. |
| SW | Switch node output | Drives external inductor and catch diode; carries high di/dt pulsed current; must be routed with minimal loop area for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | RDS(on) = 700 mΩ max at VGS = 5 V - eliminates external FET, reduces BOM count, and simplifies layout. |
| Automatic PFM/PWM mode switching | Transitions seamlessly at light loads - maintains >85% efficiency at 10 mA while minimizing quiescent current (640–800 µA). |
| Internal compensation | No external compensation components required - reduces design time and ensures stability across recommended output capacitor ESR range. |
| Undervoltage lockout (UVLO) | 2.95 V turn-on / 2.40 V turn-off - prevents erratic startup during brownout and ensures clean power-up sequencing. |
| Current-limit protection | 1.5–2.5 A peak switch current limit - safeguards against overload and short-circuit conditions without external sensing. |
Applications
| Communications Power Rail | Industrial Sensor Node |
|---|---|
Use Scenario: Generating 3.3 V or 5.0 V from 12 V PoE midspan or 19 V adapter in Ethernet switches and base stations. IC Role / Device Role / Timing Role: Nonsynchronous buck regulator providing stable intermediate rail for PHY, MAC, and management MCU. Use Value: 1.4 MHz operation allows use of 4.7 µH inductors and 10–22 µF ceramic output caps, minimizing board area in space-constrained telecom modules. | Use Scenario: Powering low-power microcontrollers, analog front-ends, and wireless transceivers (e.g., LoRa, BLE) in battery-backed industrial sensors. IC Role / Device Role / Timing Role: Primary dc-dc converter stepping down 12 V field bus or Li-ion battery (3.6–4.2 V) to 1.8 V or 3.3 V system rail. Use Value: Pulse-skip mode achieves >88% efficiency at 10–100 mA loads, extending battery life; precision EN enables wake-on-event control. |
| Medical Diagnostic Module | Consumer Audio DSP Supply |
Use Scenario: Delivering clean 1.2 V or 1.8 V to ADCs, DACs, and FPGA logic in portable ultrasound or patient monitors. IC Role / Device Role / Timing Role: Low-noise, high-accuracy point-of-load regulator with tight output tolerance (±2%) and low ripple in PWM mode. Use Value: Internal soft start (730 µs) limits inrush current into large output capacitance, preventing supply droop during power-up of sensitive analog circuitry. | Use Scenario: Replacing linear regulators in smart speaker audio subsystems requiring 1.2 V core and 3.3 V I/O rails from 5 V USB input. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling thermal headroom for sustained DSP compute without heatsinking. Use Value: 91% peak efficiency at 1 A reduces thermal dissipation vs. LDOs; TSOT-6 package fits compact audio PCB layouts near SoC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonsynchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP2300AUJZ-R2 | 700 kHz switching frequency; 1460 µs soft start; higher minimum off time (145–190 ns) | Better efficiency at medium-to-heavy loads with larger inductors; less suitable for ultra-compact designs | Select when prioritizing peak efficiency over board area, especially with VIN ≥ 12 V and IOUT > 0.5 A. |
| TPS62231DRVR | Synchronous architecture; 3 MHz switching; 0.6 V feedback; no external diode required | Higher light-load efficiency; lower dropout; but requires different layout and lacks integrated bootstrap diode | Choose for battery-powered apps needing >90% efficiency down to 100 µA; not drop-in due to sync rectification and pinout mismatch. |
Compared with ADP2300AUJZ-R2, ADP2301AUJZ-R2 trades slightly lower peak efficiency for significantly smaller passive components and faster transient response; versus TPS62231DRVR, it avoids synchronous complexity and external diode cost but requires careful diode selection and yields higher light-load quiescent loss.
Availability
ADP2301AUJZ-R2 is available at Aetrix Electronics and suitable for communications infrastructure, industrial sensor nodes, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for ADP2301AUJZ-R2 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADP2300/ADP2301 product line delivers compact, high-efficiency nonsynchronous buck regulators for space-constrained, cost-sensitive power conversion where simplicity and reliability outweigh the need for synchronous rectification.
FAQ
What is the switching frequency of the ADP2301AUJZ-R2?
The ADP2301AUJZ-R2 operates at a fixed 1.4 MHz switching frequency, with typical value 1.4 MHz and guaranteed range 1.0–1.75 MHz over temperature and input voltage. This enables use of smaller external inductors (e.g., 4.7 µH) and ceramic output capacitors compared to 700 kHz alternatives like the ADP2300AUJZ-R2.
Does the ADP2301AUJZ-R2 require an external catch diode?
Yes, the ADP2301AUJZ-R2 is a nonsynchronous buck regulator and requires an external Schottky catch diode (e.g., B230A) connected from SW to GND. The integrated bootstrap diode only supplies gate drive for the internal high-side MOSFET; it does not replace the power-path freewheeling diode.
What is the purpose of the BST pin on the ADP2301AUJZ-R2?
The BST pin on the ADP2301AUJZ-R2 provides the floating supply voltage for the internal high-side MOSFET gate driver. A 0.1 µF ceramic capacitor must be placed between BST and SW to form a charge pump; this generates ~5.0 V referenced to SW, ensuring full enhancement of the integrated MOSFET during each on-cycle.
Can the ADP2301AUJZ-R2 operate with a 3.3 V input?
Yes, the ADP2301AUJZ-R2 supports input voltages as low as 3.0 V. At 3.3 V input, it can regulate outputs down to 0.8 V (e.g., 1.2 V, 1.8 V) using appropriate inductor and diode selection. Efficiency remains >80% at 1 A load with external 5.0 V bootstrap bias per Figure 10 of the datasheet.
How does the ADP2301AUJZ-R2 handle short-circuit conditions?
The ADP2301AUJZ-R2 responds to output short circuits via frequency foldback: when FB voltage drops to ≤0.2 V, switching frequency reduces to ¼ of nominal (≈350 kHz), limiting average output current and preventing thermal runaway. Upon fault removal, it initiates a full soft-start cycle to safely restore regulation without overshoot.
ADP2301AUJZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-6
ADP2301AUJZ-R2 FAQ
1.How can I place an order for ADP2301AUJZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP2301AUJZ-R2 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 ADP2301AUJZ-R2 reliable?
The price and inventory of ADP2301AUJZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP2301AUJZ-R2 is usually 5 days.
3.What payment methods are accepted for ADP2301AUJZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP2301AUJZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP2301AUJZ-R2?
ADP2301AUJZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP2301AUJZ-R2 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 ADP2301AUJZ-R2?
For technical support, including ADP2301AUJZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP2301AUJZ-R2 requirements.
6.How does Aetrix verify that ADP2301AUJZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADP2301AUJZ-R2 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 ADP2301AUJZ-R2 meets industry standards.
7.What is the process for return or replacement of ADP2301AUJZ-R2?
All ADP2301AUJZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADP2301AUJZ-R2, 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 ADP2301AUJZ-R2 part is unused and in its original packaging.
Return procedure for ADP2301AUJZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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