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Diodes Incorporated AP3407AKTR-G1
- Part No.:
- AP3407AKTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP3407AKTR-G1.pdf
- Description:
- IC REG BUCK ADJ 1.2A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
AP3407AKTR-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 (0.28 Ω / 0.25 Ω), delivering up to 1.2 A output current with peak efficiency of 95% across 2.5–5.5 V input range, optimized for single-cell Li-ion portable power rails.
For engineers reviewing the AP3407AKTR-G1 datasheet, AP3407AKTR-G1 pinout, AP3407AKTR-G1 application, or AP3407AKTR-G1 equivalent, key selection criteria include adjustable 0.6 V reference voltage, 100% duty cycle capability in dropout, integrated soft-start, thermal shutdown at +160 °C, and RoHS/Green compliance with halogen/antimony-free construction.
Technical Context
The AP3407AKTR-G1 implements current-mode control with internal oscillator (1.12–1.68 MHz), error amplifier referenced to 0.6 V ±2%, and PWM comparator driving high-side P-MOSFET and low-side N-MOSFET switches. It features built-in over-current protection (1.5–2.0 A limit), short-circuit protection, and UVLO with 2.3 V threshold and 0.2 V hysteresis.
Functional block integration includes reverse-current prevention, soft-start timing (~1 ms), and feedback loop compensation via external resistor divider on FB pin. The device supports both adjustable-output and fixed-output configurations, with EN pin enabling/disabling logic (1.5 V high, 0.4 V low) and shutdown current <1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single Li-ion (2.7–4.2 V) and USB-powered systems without external LDO pre-regulation. |
| Output Current | 1.2 A continuous - sufficient for core logic, RF transceivers, or display drivers in compact portable designs. |
| Switching Frequency | 1.4 MHz typical - enables use of small 2.2 µH inductors and 4.7–22 µF ceramic output capacitors for space-constrained layouts. |
| Reference Voltage | 0.6 V ±2% - sets output accuracy for adjustable configurations; enables 0.6 V to VIN output range with external divider. |
| Efficiency Peak | 95% - achieved at mid-load (e.g., 500 mA @ 3.3 VIN/2.5 VOUT), minimizing thermal rise in sealed enclosures. |
| Thermal Shutdown | +160 °C with +20 °C hysteresis - prevents latch-up during sustained overload or poor PCB heat sinking. |
| Quiescent Current | 62 µA typical - extends battery life in always-on standby modes without compromising startup responsiveness. |
Pinout & Package
SOT-23-5 surface-mount package (3.0 × 1.7 × 1.3 mm, 265 °C/W θJA) with gull-wing leads, RoHS-compliant and halogen/antimony-free ("Green") construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power input supply | Bypassed with ≥4.7 µF ceramic capacitor to GND; supplies internal regulators and gate drivers. |
| 2 (GND) | Power and signal ground | Common return path for input/output capacitors, inductor, and internal circuitry; critical for EMI and stability. |
| 3 (EN) | Enable control input | Logic-level enable: >1.5 V activates regulator; <0.4 V forces shutdown with <1 µA supply current. |
| 4 (SW) | Switch node | Drain connection of internal P- and N-MOSFETs; connects directly to inductor; requires low-inductance layout. |
| 5 (FB) | Feedback input | Monitors output voltage via resistor divider; regulates output by comparing to 0.6 V internal reference. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switches | P-channel and N-channel MOSFETs with RDS(ON) = 0.28 Ω / 0.25 Ω reduce external component count and conduction losses. |
| 100% Duty Cycle Operation | Enables dropout mode down to VOUT – VIN ≈ 0 V, maintaining regulation as battery discharges below output voltage. |
| Built-in Soft-start | ~1 ms internal ramp prevents inrush current and output overshoot during power-up or EN assertion. |
| Comprehensive Protection | Includes over-current, short-circuit, thermal shutdown (+160 °C), and UVLO (2.3 V with 0.2 V hysteresis) for robust field operation. |
| Low Quiescent Current | 62 µA operating current and <1 µA shutdown current extend runtime in battery-backed IoT sensors and wearables. |
Applications
| Smartphone Core Rail | Wireless Headset PMU |
|---|---|
|
Use Scenario: Powers ARM Cortex-M4F MCU and BLE radio subsystem from single 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator generating 1.8 V core voltage with tight load transient response. Use Value: 95% efficiency at 800 mA reduces thermal load in sealed earbud housing; 1.4 MHz switching avoids audible noise. |
Use Scenario: Supplies 3.3 V to MEMS microphone and DSP in ultra-low-power Bluetooth audio accessory. IC Role / Device Role / Timing Role: Always-on buck converter with EN-controlled sleep/wake cycling. Use Value: 1 µA shutdown current preserves battery for >6 months shelf life; 0.6 V reference enables precise 3.3 V setting via 2-resistor divider. |
| Portable Medical Sensor | Industrial Handheld Scanner |
|
Use Scenario: Delivers regulated 2.5 V to analog front-end and ADC in FDA-cleared glucose monitor. IC Role / Device Role / Timing Role: Precision power source with ±2% output accuracy and low noise for signal integrity. Use Value: 0.6 V reference tolerance ensures stable 2.5 V output across -40 °C to +85 °C; thermal shutdown prevents sensor drift during extended use. |
Use Scenario: Generates 5.0 V rail for laser diode driver and CMOS image sensor in ruggedized barcode scanner. IC Role / Device Role / Timing Role: High-current (1.2 A) intermediate regulator feeding downstream LDOs and analog circuits. Use Value: Integrated 0.25 Ω N-MOSFET minimizes dropout loss when input drops to 4.5 V; SOT-23-5 footprint saves PCB area in compact form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2153GQZ-P | 2.2 MHz switching, 1.5 A rating, 0.6 V reference, but requires external bootstrap capacitor and lacks 100% duty cycle. | Higher frequency enables smaller magnetics but increases EMI filtering complexity; no dropout support limits low-VIN operation. | Select when board space is constrained and input stays >3.0 V; avoid if Li-ion end-of-discharge operation is required. |
| TPS62231DRVR | 3 MHz fixed frequency, 0.6 V reference, 0.95 A max, integrated soft-start, but only 2.05–6.0 V input range and no thermal hysteresis. | Higher minimum input excludes direct use with discharged Li-ion (<2.5 V); thermal shutdown lacks hysteresis, risking oscillation near trip point. | Prefer for higher-frequency designs where input remains >2.5 V and thermal margin is well controlled; verify dropout behavior. |
Compared with MP2153GQZ-P and TPS62231DRVR, AP3407AKTR-G1 offers unique 100% duty cycle capability and tighter thermal hysteresis (+20 °C), making it more suitable for wide-input portable systems with aggressive battery discharge profiles.
Availability
AP3407AKTR-G1 is available at Aetrix Electronics and suitable for smartphone core rails, wireless headset PMUs, portable medical sensors, and industrial handheld scanners requiring stable component supply under evolving battery voltage conditions.
Supply support for AP3407AKTR-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 AP3407 series belongs to Diodes' high-frequency synchronous buck converter product line, designed specifically for space- and efficiency-critical portable electronics powered by single-cell Li-ion batteries.
FAQ
What is the maximum output current capability of AP3407AKTR-G1 under real-world PCB thermal conditions?
The AP3407AKTR-G1 delivers 1.2 A continuous output current when mounted on a standard 2-layer PCB with 1-in² 2-oz copper pour per side and ambient temperature ≤+60 °C. At +85 °C ambient, derating to 0.95 A is recommended based on thermal resistance (θJA = 265 °C/W) and 160 °C junction limit.
Can AP3407AKTR-G1 operate with input voltage below 2.5 V, such as a deeply discharged Li-ion cell?
No - the absolute minimum input voltage is 2.5 V per datasheet specifications. Below this, UVLO disables operation, and internal bias circuits cannot sustain regulation. The device does not support sub-2.5 V operation even in dropout mode; design must ensure battery cutoff above 2.5 V or add pre-boost stage.
Is the FB pin internally compensated, or does it require external compensation components?
The AP3407AKTR-G1 uses internal compensation for the error amplifier and does not require external compensation components on the FB node. Stability is ensured with standard output capacitor ESR ranges (e.g., 5–50 mΩ for ceramic caps); no additional RC network is needed for basic configurations.
Does AP3407AKTR-G1 support forced PWM mode, or is it strictly current-mode with automatic PFM/PWM transition?
AP3407AKTR-G1 operates exclusively in current-mode PWM with fixed 1.4 MHz frequency and no PFM mode. It does not support forced PWM or frequency modulation; light-load efficiency relies on reduced switching losses from low quiescent current (62 µA), not pulse-skipping or frequency scaling.
AP3407AKTR-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:
- 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
AP3407AKTR-G1 FAQ
1.How can I place an order for AP3407AKTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3407AKTR-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 AP3407AKTR-G1 reliable?
The price and inventory of AP3407AKTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3407AKTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3407AKTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3407AKTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3407AKTR-G1?
AP3407AKTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3407AKTR-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 AP3407AKTR-G1?
For technical support, including AP3407AKTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3407AKTR-G1 requirements.
6.How does Aetrix verify that AP3407AKTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3407AKTR-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 AP3407AKTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3407AKTR-G1?
All AP3407AKTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3407AKTR-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 AP3407AKTR-G1 part is unused and in its original packaging.
Return procedure for AP3407AKTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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