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Diodes Incorporated AP3417CKTR-G1
- Part No.:
- AP3417CKTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP3417CKTR-G1.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:108,664
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Product details
Overview
AP3417CKTR-G1 from Diodes Incorporated is a 1.5MHz synchronous step-down DC-DC converter with integrated high- and low-side MOSFETs, optimized for portable applications requiring compact power solutions. It operates across 2.5V–5.5V input, delivers up to 1A output current, supports adjustable output from 0.6V to 0.9×VIN, and features built-in soft start, UVLO, thermal shutdown, and short-circuit protection in SOT-23-5 package.
For engineers reviewing the AP3417CKTR-G1 datasheet, AP3417CKTR-G1 pinout, AP3417CKTR-G1 application, or AP3417CKTR-G1 equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters (fOSC = 1.5MHz, VFB = 600mV, RDS(ON) = 200mΩ), and real-world design guidance for post-regulation in battery-powered systems.
Technical Context
The AP3417CKTR-G1 employs peak-current mode control with internal 1.5MHz oscillator and integrated synchronous rectification, eliminating external Schottky diodes. Its error amplifier compares 600mV feedback voltage against regulated output, enabling precise voltage setting via resistor divider on FB pin.
Protection logic includes cycle-by-cycle overcurrent detection triggered at ~1.5A peak inductor current, hiccup-mode short-circuit response below 0.42V FB, and thermal shutdown activation at +160°C with +145°C recovery hysteresis - all implemented without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5MHz fixed - enables use of 2.2µH inductors and compact 4.7µF/10µF ceramic capacitors in space-constrained designs. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), Li-polymer, and 3.3V/5V rail post-regulation. |
| Output Current | 1.0A continuous - sufficient for powering core logic, RF modules, or sensor subsystems in portable electronics. |
| Feedback Voltage | 600mV ±2% - sets output accuracy; allows VOUT = 0.6V × (1 + R1/R2) with minimal divider current impact on efficiency. |
| RDS(ON) | 200mΩ (both HS & LS MOSFETs at VIN = 5V) - reduces conduction loss and improves full-load efficiency above 85% at 1.2V/1A. |
| Soft Start Time | 400µs - prevents inrush current during power-up, limiting input capacitor stress and system rail droop. |
| UVLO Threshold | 2.3V (rising), 2.1V (falling) - ensures clean startup/shutdown sequencing when powered from fading battery sources. |
Pinout & Package
AP3417CKTR-G1 is supplied in RoHS-compliant and halogen-free SOT-23-5 package (3.0mm × 1.7mm × 1.3mm), featuring exposed pad for thermal enhancement and standard JEDEC footprint compatibility.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Active-high enable input; ≥1.5V enables regulation, ≤0.4V forces shutdown with <0.1µA quiescent current. |
| 2 | GND | Power ground reference for internal circuitry and switch node return path; must be low-impedance connection. |
| 3 | LX | Switch node output connecting to inductor; carries high di/dt switching current and requires tight layout to minimize EMI. |
| 4 | FB | Resistor-divider feedback input; referenced to 600mV internal bandgap - sets output voltage precision and stability. |
| 5 | VIN | Main power input (2.5–5.5V); supplies internal bias and high-side MOSFET gate drive; requires local 4.7µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 200mΩ HS/LS MOSFETs eliminate external Schottky diode, improving efficiency by ~8–12% at light-to-moderate loads. |
| Internal soft start | 400µs controlled ramp prevents output overshoot and limits inrush into downstream capacitance during startup. |
| Hiccup-mode short-circuit protection | Auto-recovery after fault removal (FB > 0.42V); avoids thermal runaway during sustained output shorts. |
| 100% duty-cycle low-dropout operation | Maintains regulation down to VOUT ≈ VIN − 0.1V - critical for battery-powered systems near end-of-discharge. |
| Input/Output overvoltage protection | Detects VIN > 6.0V and VOUT > 1.2×VREF; disables switching to prevent damage to load or IC under transient overvoltage events. |
Applications
| Wearable Sensor Node | USB-Powered Peripheral |
|---|---|
Use Scenario: Powering ultra-low-power MCU, BLE radio, and analog front-end from coin cell or small Li-polymer battery. IC Role / Device Role / Timing Role: Primary buck regulator providing stable 1.8V or 3.3V rail with minimal quiescent current and fast load transient response. Use Value: Enables >2-week battery life at 10µA average system current due to 0.1µA shutdown current and high light-load efficiency. |
Use Scenario: Regulating 5V USB input to 3.3V for microcontroller, display driver, and I²C peripherals in portable accessories. IC Role / Device Role / Timing Role: Post-regulator converting noisy USB supply to clean, low-noise 3.3V with integrated EMI mitigation via 1.5MHz switching. Use Value: Eliminates need for external LDO or filter stages while maintaining <10mVpp output ripple at full 1A load. |
| Industrial Handheld Terminal | Smart Home Sensor Hub |
Use Scenario: Supplying 1.2V core voltage to ARM Cortex-M processor and 3.3V I/O rail from 3.6V Li-ion battery pack. IC Role / Device Role / Timing Role: Dual-rail support via single IC (using FB divider configuration) with thermal robustness across -40°C to +85°C ambient. Use Value: Maintains regulation during cold-start (-40°C) and high-temp operation (+85°C) with no derating, supported by 155°C junction thermal shutdown. |
Use Scenario: Powering Zigbee/Thread SoC, environmental sensors, and flash memory from 2xAA alkaline (up to 3.2V) or 3.7V Li-ion. IC Role / Device Role / Timing Role: Wide-input buck converter enabling single power architecture across multiple battery chemistries and states of charge. Use Value: Operates down to 2.5V input, supporting full functionality until battery reaches end-of-life (~0.8V/cell). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3428A | Higher 2A output capability, 2.2MHz switching frequency, same 0.6V feedback and SOT-23-5 package. | Better suited for higher-current loads (e.g., dual-core MCUs) but requires smaller 1µH inductor and tighter layout for EMI control. | Select AP3428A only if >1A output or faster transient response is required; AP3417CKTR-G1 remains optimal for cost-sensitive 1A designs. |
| MP2153GQ-Z | Monolithic 1.2A buck with 2.2MHz fSW, 0.6V FB, but no integrated EN pull-down or hiccup-mode SCP. | Lacks automatic short-circuit recovery; requires external EN control for safe shutdown in fault conditions. | Prefer AP3417CKTR-G1 where autonomous fault handling and guaranteed restart after short removal are mandatory. |
Compared with AP3428A and MP2153GQ-Z, AP3417CKTR-G1 offers best-in-class integration of protection features (hiccup SCP, IOVP, OVP) and thermal robustness (155°C TJ) in a proven 1A footprint - making it ideal for safety-aware, battery-critical portable systems where reliability outweighs marginal current headroom.
Availability
AP3417CKTR-G1 is available at Aetrix Electronics and suitable for wearable sensor nodes, USB-powered peripherals, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and RoHS/Green compliance.
Supply support for AP3417CKTR-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 high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The AP3417C belongs to Diodes' high-frequency synchronous buck converter product line, designed specifically for space-constrained, battery-operated devices needing reliable, integrated DC-DC conversion with minimal external components.
FAQ
What is the minimum input voltage required for AP3417CKTR-G1 to regulate a 1.2V output?
The AP3417CKTR-G1 requires minimum 2.5V input to maintain regulation across its full output range. At VOUT = 1.2V, the device achieves 100% duty cycle operation down to VIN ≈ 1.3V, but functional regulation begins only at 2.5V per datasheet's Recommended Operating Conditions - below which UVLO disables switching.
Can AP3417CKTR-G1 operate without an external feedback resistor divider?
No - the FB pin requires an external resistor divider to set output voltage. The internal 600mV reference is not directly accessible; VOUT = 0.6V × (1 + R1/R2). Omitting the divider leaves FB floating, causing unregulated output and potential instability or overvoltage failure.
Does AP3417CKTR-G1 require a minimum load to maintain regulation?
No minimum load is specified. The AP3417CKTR-G1 maintains regulation from 0A to 1A output using peak-current mode control and internal compensation. Light-load efficiency is preserved via natural pulse-skipping behavior, with no external circuitry needed for zero-load operation.
Is the SOT-23-5 package of AP3417CKTR-G1 thermally adequate for 1A continuous operation at 85°C ambient?
Yes - with proper PCB layout (2-layer board, 1-in² 2oz copper pour under EP pad), θJA = 250°C/W allows ~35°C junction rise at 1A, keeping TJ well below 125°C max. Derating is unnecessary unless ambient exceeds 85°C or airflow is restricted.
AP3417CKTR-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):
- 4.95V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP3417CKTR-G1 FAQ
1.How can I place an order for AP3417CKTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3417CKTR-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 AP3417CKTR-G1 reliable?
The price and inventory of AP3417CKTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3417CKTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3417CKTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3417CKTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3417CKTR-G1?
AP3417CKTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3417CKTR-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 AP3417CKTR-G1?
For technical support, including AP3417CKTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3417CKTR-G1 requirements.
6.How does Aetrix verify that AP3417CKTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3417CKTR-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 AP3417CKTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3417CKTR-G1?
All AP3417CKTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3417CKTR-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 AP3417CKTR-G1 part is unused and in its original packaging.
Return procedure for AP3417CKTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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