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Diodes Incorporated AP3417AKTR-G1
- Part No.:
- AP3417AKTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP3417AKTR-G1.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,944
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Product details
Overview
AP3417AKTR-G1 from Diodes Incorporated is a 1.4 MHz fixed-frequency, current-mode PWM synchronous buck DC-DC converter in SOT-23-5 package, integrating low-RDS(ON) P-channel and N-channel MOSFETs to deliver 1 A output current with up to 95% efficiency across 2.5 V–5.5 V input range. It features adjustable output (0.6 V to VIN), 100% duty cycle in dropout, and built-in protections including overcurrent, short-circuit, thermal shutdown, UVLO, and soft-start - optimized for single-cell Li-ion portable power rails.
For engineers reviewing the AP3417AKTR-G1 datasheet, AP3417AKTR-G1 pinout, AP3417AKTR-G1 application, or AP3417AKTR-G1 equivalent, key selection criteria include its 1.4 MHz switching frequency for compact filter design, integrated synchronous switch RDS(ON) values (0.25 Ω P-FET / 0.20 Ω N-FET), EN-controlled shutdown (<1 µA IQ), and FB-based voltage regulation accuracy (±2% over temperature).
Technical Context
The AP3417AKTR-G1 employs peak-current-mode control with internal 0.6 V reference and error amplifier to regulate output via external resistor divider on FB. Its oscillator operates at nominal 1.4 MHz (1.12–1.68 MHz over conditions), enabling small external inductors (e.g., 2.2 µH) and ceramic capacitors (4.7 µF CIN, 22 µF COUT).
Protection architecture includes cycle-by-cycle current limiting (1.3–1.8 A trip), reverse-current blocking, thermal shutdown at +160 °C with +20 °C hysteresis, and UVLO activation at 2.3 V with 0.2 V hysteresis. EN pin logic thresholds (VH = 1.5 V, VL = 0.4 V) support direct microcontroller interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single Li-ion (3.0–4.2 V) and USB-powered systems without pre-regulation. |
| Switching Frequency | 1.4 MHz (typical), 1.12–1.68 MHz (min/max) - enables use of sub-3 mm inductors and reduces EMI fundamental frequency. |
| Output Current | 1 A continuous - sufficient for core logic rails in smartphones and set-top boxes with thermal derating above +85 °C ambient. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(ON) switches (0.25 Ω P-FET, 0.20 Ω N-FET). |
| Reference Voltage | 0.6 V ±2% - sets output voltage accuracy for ADJ configuration using external resistor divider on FB pin. |
| Quiescent Current | 62 µA (typical) - minimizes battery drain during active operation in always-on subsystems. |
| Shutdown Current | 0.1 µA (typical) - ensures ultra-low leakage when EN is pulled low, critical for long standby life. |
Pinout & Package
SOT-23-5 package: 2.82 mm × 1.50 mm × 1.10 mm body, 0.95 mm lead pitch, thermally enhanced pad layout per Diodes Inc. recommended footprint (E2 = 1.90 mm, E1 = 0.95 mm, X = 0.70 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable control input | Logic-high (>1.5 V) enables regulator; logic-low (<0.4 V) disables all circuitry, reducing supply current to <1 µA. |
| 2 GND | Power and signal ground reference | Common return path for VIN bypass capacitor, feedback network, and internal current-sense amplifier. |
| 3 SW | Switch node output | Drain connection of internal P-FET and source of N-FET; connects directly to inductor and catch diode (if used). |
| 4 VIN | Main power input | Supplies internal bias and power switches; requires ≥4.7 µF ceramic bypass capacitor to GND for stability and ripple suppression. |
| 5 FB | Feedback input | Monitors output voltage via resistor divider; internal 0.6 V reference compares against FB voltage to adjust duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Operation | Enables regulation down to VOUT ≈ VIN − IOUT × RDS(ON)_P, extending usable input range in dropout conditions. |
| Built-in Soft-Start | 1 ms typical startup ramp prevents inrush current and output overshoot during power-up. |
| Thermal Shutdown with Hysteresis | Triggers at +160 °C junction temperature and releases at +140 °C, preventing thermal oscillation during overload. |
| UVLO with Hysteresis | Prevents erratic startup by holding off until VIN exceeds 2.3 V and remains stable through 0.2 V hysteresis band. |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting, fast transient response, and simplified loop compensation. |
Applications
| Smartphone Core Rail | Set-Top Box SoC Supply |
|---|---|
|
Use Scenario: Powering application processor core voltage (e.g., 1.2 V @ 1 A) from a single Li-ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise DC output with fast load-step response. Use Value: 95% efficiency extends battery runtime; 1.4 MHz switching allows compact 2.2 µH inductor and avoids AM radio band interference. |
Use Scenario: Generating 3.3 V or 2.5 V for digital video processing ICs in cable/satellite STB platforms. IC Role / Device Role / Timing Role: Secondary DC-DC converter stepping down 5 V rail to lower logic voltages with high PSRR and low output ripple. Use Value: Integrated MOSFETs eliminate external FET selection; EN pin enables system-level power sequencing with MCU GPIO. |
| Portable Medical Monitor | Datacom Line Card LDO Replacement |
|
Use Scenario: Supplying 1.8 V to ADC/DAC and microcontroller in handheld patient monitors operating from 3.7 V Li-ion. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator replacing linear regulators to reduce thermal load in sealed enclosures. Use Value: Thermal shutdown (+160 °C) and short-circuit protection ensure safe operation during sensor fault conditions. |
Use Scenario: Replacing inefficient 5 V-to-3.3 V LDOs on Ethernet line cards where heat dissipation is constrained. IC Role / Device Role / Timing Role: Efficient step-down converter delivering 1 A at 3.3 V with minimal board area and thermal rise. Use Value: 0.25 Ω/0.20 Ω RDS(ON) reduces conduction loss vs. discrete solutions; SOT-23-5 footprint simplifies layout migration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3417CKTR-G1 | Direct revision replacement: identical pinout, same specs, updated process for improved thermal performance and reliability. | No functional change; intended for new designs and BOM refreshes where AP3417A is obsolete. | Select for new designs requiring guaranteed long-term availability and latest Diodes Inc. wafer fab qualification. |
| TPS62231DRYR | 1.8 MHz switching, 0.6 V ref, but only 0.6 A output current and no 100% duty cycle mode. | Lower current capability limits use to sub-600 mA loads; higher fSW increases switching loss at high IOUT. | Consider only if 1.4 MHz is not required and output current ≤600 mA; verify thermal margin under full load. |
Compared with AP3417CKTR-G1, the AP3417AKTR-G1 shares identical electrical behavior but lacks the updated process qualifications; versus TPS62231DRYR, it delivers 67% higher output current and maintains regulation in deeper dropout - critical for Li-ion discharge curves.
Availability
AP3417AKTR-G1 is available at Aetrix Electronics and suitable for smartphone core rails, set-top box SoC supplies, portable medical monitors, and datacom line card power conversion requiring stable component supply despite its obsolete status.
Supply support for AP3417AKTR-G1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection devices for consumer, industrial, and automotive markets.
The AP3417A belongs to Diodes' high-frequency synchronous buck converter product line, designed specifically for space-constrained, battery-powered applications demanding high efficiency, low quiescent current, and robust protection in SOT-23-5 packaging.
FAQ
Is AP3417AKTR-G1 still in production?
No - Diodes Incorporated has officially discontinued the AP3417A series. The AP3417CKTR-G1 is the designated replacement part with identical pinout, electrical specifications, and SOT-23-5 packaging. Aetrix Electronics maintains limited legacy stock of AP3417AKTR-G1 for existing production continuity, subject to availability verification prior to order release.
What is the minimum output voltage achievable with AP3417AKTR-G1?
The AP3417AKTR-G1 supports adjustable output down to 0.6 V, set by the internal 0.6 V reference voltage and external resistor divider on the FB pin. This minimum is fixed by the error amplifier's reference; outputs below 0.6 V are not supported due to lack of internal scaling or external reference options.
Can AP3417AKTR-G1 operate without an external inductor?
No - the AP3417AKTR-G1 is a synchronous buck converter requiring an external inductor between the SW pin and output capacitor. The inductor stores energy during the high-side switch conduction phase and transfers it to the output during low-side conduction. Omitting it will cause immediate failure due to uncontrolled current surge and thermal damage.
Does AP3417AKTR-G1 support forced PWM or power-save mode?
No - the AP3417AKTR-G1 operates exclusively in fixed-frequency current-mode PWM. It does not feature pulse-frequency modulation (PFM) or automatic mode switching. Light-load efficiency is maintained via low quiescent current (62 µA), but frequency remains constant at ~1.4 MHz regardless of load.
AP3417AKTR-G1 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:
- 1A
- 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
AP3417AKTR-G1 FAQ
1.How can I place an order for AP3417AKTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3417AKTR-G1 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 AP3417AKTR-G1 reliable?
The price and inventory of AP3417AKTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3417AKTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3417AKTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3417AKTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3417AKTR-G1?
AP3417AKTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3417AKTR-G1 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 AP3417AKTR-G1?
For technical support, including AP3417AKTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3417AKTR-G1 requirements.
6.How does Aetrix verify that AP3417AKTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3417AKTR-G1 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 AP3417AKTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3417AKTR-G1?
All AP3417AKTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3417AKTR-G1, 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 AP3417AKTR-G1 part is unused and in its original packaging.
Return procedure for AP3417AKTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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