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Diodes Incorporated AP3417BK-ADJTRG1
- Part No.:
- AP3417BK-ADJTRG1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP3417BK-ADJTRG1.pdf
- Description:
- IC REG BUCK ADJ 1.2A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,372
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Product details
Overview
AP3417BK-ADJTRG1 from BCD Semiconductor Manufacturing Limited is a 1.4MHz synchronous step-down DC-DC converter with integrated P/N-channel MOSFETs, delivering up to 1.2A output current, 0.6V–VIN adjustable output voltage, and peak efficiency of 95%. It operates from a 2.5V–5.5V input and features built-in soft-start, thermal shutdown, and input over-voltage protection-designed for Li-ion-powered portable devices including smartphones and set-top boxes.
For engineers reviewing the AP3417BK-ADJTRG1 datasheet, AP3417BK-ADJTRG1 pinout, AP3417BK-ADJTRG1 application, or AP3417BK-ADJTRG1 equivalent, key selection criteria include its 1.2A current capability, SOT-23-5 footprint, 100% duty cycle in dropout, internal current-mode control, and ADJ feedback architecture requiring external resistor divider configuration.
Technical Context
The AP3417BK-ADJTRG1 implements fixed-frequency (1.12–1.68MHz) current-mode PWM control with internal slope compensation. Its synchronous topology uses low-RDS(ON) P-channel (0.25Ω typ) and N-channel (0.2Ω typ) MOSFETs to minimize conduction loss across load range.
Feedback is regulated via an external resistor divider connected to the FB pin, referencing a precision 0.6V (±2%) internal bandgap. Protection functions include cycle-by-cycle current limiting (1.5–2.0A), thermal shutdown at 160°C with 20°C hysteresis, and input OVP at 6.3V with 0.5V hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V–5.5V: Supports single-cell Li-ion (3.0–4.2V) and USB-powered systems without external LDO pre-regulation. |
| Output Current | 1.2A continuous: Enables direct powering of core logic or RF subsystems in portable SoC designs. |
| Switching Frequency | 1.4MHz nominal (1.12–1.68MHz): Allows use of compact 1–2.2µH inductors and reduces EMI filtering burden. |
| Efficiency | Up to 95%: Minimizes thermal dissipation in space-constrained handheld enclosures. |
| Reference Voltage | 0.6V ±2%: Enables accurate output setting down to 0.6V with standard 1% resistors. |
| Quiescent Current | 62–100µA: Extends battery runtime in always-on low-power modes. |
| Shutdown Current | 0.1–1µA: Ensures negligible drain during system sleep or off-state. |
Pinout & Package
The AP3417BK-ADJTRG1 is housed in a RoHS-compliant SOT-23-5 package with 0.95mm pitch, optimized for high-density PCB layouts and thermal performance via exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Logic-level enable: >1.5V activates regulator; <0.4V forces shutdown with sub-1µA supply current. |
| 2 GND | Power ground reference | Common return path for IC bias, power switches, and feedback network-must be low-impedance connection to PCB ground plane. |
| 3 SW | Switch node | Drain connection of internal P/N-FETs; drives external inductor and requires tight layout to minimize ringing and EMI. |
| 4 VIN | Input power supply | Accepts 2.5–5.5V; requires ≥4.7µF ceramic bypass capacitor placed adjacent to pin for stability and transient response. |
| 5 FB | Feedback input | Resistor-divider node for output voltage regulation; connects directly to VOUT for fixed versions or to divider midpoint for ADJ configuration. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation down to VOUT ≈ VIN − ILOAD × RDS(ON)_P, critical for Li-ion end-of-discharge support. |
| Built-in Soft-start | 1ms internal ramp prevents inrush current and output overshoot during startup, eliminating need for external timing components. |
| Synchronous Power Stage | Integrated 0.25Ω/0.2Ω P/N-FETs reduce conduction loss vs. diode-based buck, improving light-load efficiency and thermal margin. |
| Input Over-Voltage Protection | Shuts down at 6.3V VIN with 0.5V hysteresis, safeguarding downstream circuitry from USB or adapter transients. |
| Thermal Shutdown with Hysteresis | Triggers at 160°C junction temperature and re-enables only after cooling by ≥20°C, preventing thermal cycling instability. |
Applications
| Smartphone Core Power | Set-Top Box SoC Rail |
|---|---|
Use Scenario: Supplying 1.2V/1.0A core voltage to ARM Cortex-A series processors in battery-operated smartphones. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing dynamically scaled CPU voltage under PMIC coordination. Use Value: 95% efficiency at 1A extends talk time; 1.4MHz switching enables small 1.5µH inductor and low-profile 4.7µF ceramic output cap. | Use Scenario: Generating 3.3V/1.2A for video decoder ASIC and HDMI interface circuitry in consumer STB platforms. IC Role / Device Role / Timing Role: Standalone point-of-load regulator decoupled from main 12V rail, minimizing noise coupling into analog video paths. Use Value: Low 100µA quiescent current preserves standby power budget; IOVP protects against 5V USB port misconnection. |
| Portable Medical Monitor | Datacom SFP+ Module |
Use Scenario: Delivering 1.8V/1.2A to FPGA-based signal processing engine in handheld ECG or pulse oximeter units. IC Role / Device Role / Timing Role: High-reliability power stage with thermal and short-circuit protection for Class II medical device compliance. Use Value: Built-in SCP and TSD eliminate need for external fault monitoring; SOT-23-5 footprint simplifies IPC-compliant layout. | Use Scenario: Providing 3.3V/1.2A to SFP+ transceiver modules in enterprise switches where board space and thermal density are constrained. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing discrete FET + controller solutions in pluggable optical module PCBs. Use Value: 1.4MHz operation avoids interference with 10Gbps serial data lanes; 265°C/W θJA supports natural convection cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2108DJ-LF-Z | Fixed 3.3V output; no ADJ option; 1.5MHz switching; 1.2A rating; same SOT-23-5 package | Requires redesign of feedback network; lacks output adjustability for multi-rail systems | Select when fixed 3.3V output suffices and board layout reuse is prioritized over flexibility. |
| TPS62231DRVR | 1.8V fixed output; 3.6MHz switching; 0.6A max current; 2.05V–6.0V input; WSON-6 package | Lower current capacity and different footprint; higher frequency demands tighter layout control | Choose for ultra-compact designs needing higher frequency and lower profile, accepting reduced current headroom. |
Compared with MP2108DJ-LF-Z and TPS62231DRVR, the AP3417BK-ADJTRG1 uniquely combines adjustable output, 1.2A capability, and SOT-23-5 packaging-enabling single-part support for multiple voltage rails without sacrificing board area or thermal margin.
Availability
AP3417BK-ADJTRG1 is available at Aetrix Electronics and suitable for smartphone power management, set-top box SoC rails, portable medical monitors, and datacom SFP+ modules requiring stable component supply and long-term production continuity.
Supply support for AP3417BK-ADJTRG1 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based fabless analog IC designer specializing in high-efficiency power management, motor drivers, and mixed-signal solutions for consumer, industrial, and communications markets.
The AP3417B product line targets cost-sensitive, space-constrained portable electronics requiring integrated, robust, and easy-to-design DC-DC conversion-emphasizing minimal external components and broad input compatibility.
FAQ
What is the minimum recommended output capacitor value for stable operation?
The AP3417BK-ADJTRG1 requires a minimum 10µF ceramic output capacitor with ≤10mΩ ESR for stable loop response and acceptable load transient performance. Typical designs use 22µF X5R/X7R 0805 or 1206 packages placed within 3mm of the FB and GND pins to minimize parasitic inductance.
Can the AP3417BK-ADJTRG1 operate with input voltage below 2.5V?
No-the absolute minimum operating input voltage is 2.5V per Recommended Operating Conditions. Below this, UVLO disables the device, and internal bias circuits cannot sustain regulation. The 2.3V UVLO threshold ensures reliable turn-on only after sufficient battery charge remains.
How does the 100% duty cycle feature improve system performance?
The 100% duty cycle allows the AP3417BK-ADJTRG1 to maintain regulation even when input voltage drops close to the output level-e.g., a 3.3V output remains stable down to ~3.4V input. This extends usable battery life in Li-ion systems by avoiding premature brownout shutdown during discharge.
Is an external bootstrap capacitor required for the high-side P-MOSFET?
No-the AP3417BK-ADJTRG1 integrates all necessary gate drive circuitry, including internal charge pump for the P-channel high-side switch. No external bootstrap capacitor or floating supply is needed, simplifying design and reducing BOM count versus controllers requiring external FETs.
AP3417BK-ADJTRG1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP3417BK-ADJTRG1 FAQ
1.How can I place an order for AP3417BK-ADJTRG1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3417BK-ADJTRG1 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 AP3417BK-ADJTRG1 reliable?
The price and inventory of AP3417BK-ADJTRG1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3417BK-ADJTRG1 is usually 5 days.
3.What payment methods are accepted for AP3417BK-ADJTRG1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3417BK-ADJTRG1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3417BK-ADJTRG1?
AP3417BK-ADJTRG1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3417BK-ADJTRG1 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 AP3417BK-ADJTRG1?
For technical support, including AP3417BK-ADJTRG1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3417BK-ADJTRG1 requirements.
6.How does Aetrix verify that AP3417BK-ADJTRG1 is sourced from the original manufacturer or authorized distributors?
All AP3417BK-ADJTRG1 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 AP3417BK-ADJTRG1 meets industry standards.
7.What is the process for return or replacement of AP3417BK-ADJTRG1?
All AP3417BK-ADJTRG1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3417BK-ADJTRG1, 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 AP3417BK-ADJTRG1 part is unused and in its original packaging.
Return procedure for AP3417BK-ADJTRG1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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