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Diodes Incorporated AP62400WU-7
- Part No.:
- AP62400WU-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
AP62400WU-7.pdf
- Description:
- IC REG BUCK ADJ 4A TSOT26
- Quantity:
- Payment:
- Shipping:
Inventory:2,834
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Product details
Overview
AP62400WU-7 from Diodes Incorporated is a 4A synchronous buck DC-DC converter with 4.2V–18V input range, integrated 50mΩ high-side and 22mΩ low-side MOSFETs, 0.8V ±1% reference voltage, 800kHz switching frequency (at 12VIN/5VOUT), and proprietary EMI-optimized gate driver. It delivers stable 5V/3.3V point-of-load power for FPGA, DSP, and consumer electronics power rails.
For engineers reviewing the AP62400WU-7 datasheet, AP62400WU-7 pinout, AP62400WU-7 application, or AP62400WU-7 equivalent, this page provides verified technical context, validated pin functions, confirmed EMI-reduction architecture, real-world load transient performance data, and precise alternative selection guidance for industrial and consumer power design.
Technical Context
The AP62400WU-7 employs Constant On-Time (COT) control with input- and output-voltage-dependent on-time calculation (tON = VOUT / (VIN × fSW)), enabling pseudo-fixed-frequency operation across 4.2–18V input while maintaining fast transient response and inherent loop stability without external compensation.
Its proprietary multi-level gate driver suppresses SW node ringing without degrading rise/fall slew rates-directly reducing high-frequency radiated EMI-while cycle-by-cycle valley current limiting (4.0–6.5A threshold) and thermal shutdown (+160°C trip with +20°C hysteresis) ensure robust protection under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.2V to 18V DC - supports direct connection to 5V/12V distributed bus rails without pre-regulation. |
| IOUT Max | 4A continuous - sustains full-rated output current at +85°C ambient with recommended PCB layout. |
| VFB Reference | 0.800V ±1% at +25°C - enables accurate output voltage setting from 0.8V to 7V via external resistor divider. |
| fSW | 800kHz typical at 12VIN/5VOUT - balances efficiency, component size, and EMI performance in compact designs. |
| IQ (PFM) | 190μA typical - minimizes no-load power loss in always-on systems like smart displays and networked peripherals. |
| RDS(ON) HS/LS | 50mΩ / 22mΩ - integrated MOSFETs reduce conduction loss and eliminate external switch selection effort. |
| UVLO Threshold | Falling edge at 3.6V - prevents erratic startup during brownout; programmable via EN pin resistive divider. |
Pinout & Package
AP62400WU-7 is housed in a thermally enhanced TSOT26 package (2.9mm × 1.6mm × 0.6mm, 0.95mm pitch), optimized for high-power density and efficient PCB heat dissipation with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power Ground | Main return path for high-current switching loops; must be connected to large copper pour for thermal and EMI control. |
| SW | Switching Node | Drives external inductor; carries high di/dt current-requires minimized trace length and tight coupling to GND for EMI reduction. |
| VIN | Input Power Supply | Accepts 4.2–18V; requires ≥10μF ceramic bypass capacitor placed adjacent to pin to suppress switching noise. |
| FB | Feedback Voltage Sense | Monitors output via resistive divider; high-impedance input enables precision regulation with minimal divider current. |
| EN | Enable Control Input | Digital ON/OFF control with 1.2V logic-high threshold; internal 1.5μA pull-up enables auto-start when left floating. |
| BST | Bootstrap Capacitor Terminal | Supplies gate drive for high-side MOSFET; requires 100nF X7R ceramic capacitor between BST and SW for reliable operation. |
Key Features
| Feature | Design Value |
|---|---|
| EMI-optimized switching node | Proprietary gate driver eliminates SW ringing without sacrificing MOSFET switching speed or efficiency. |
| Light-load PFM mode | 190μA quiescent current and 83% efficiency at 5mA enable battery-backed or energy-sensitive applications. |
| Integrated protection suite | Undervoltage lockout (3.6V), cycle-by-cycle valley current limit (4.0–6.5A), and thermal shutdown (+160°C). |
| Fast transient response | COT control achieves sub-10μs recovery from 2A→4A load steps without external compensation components. |
| Robust thermal performance | θJA = 70°C/W on 2-layer FR-4 board ensures stable 4A operation up to +85°C ambient. |
Applications
| Flat Screen TV Power Rails | FPGA Core Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 3.3V/1.2V power to display controller ICs and timing circuits in 4K UHD TVs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable PoL voltage with low output ripple (<20mVpp at 4A). Use Value: Proprietary EMI suppression meets CISPR-32 Class B radiated emissions limits without added ferrite beads or shielding. |
Use Scenario: Generating configurable core voltage (0.8–1.2V) for Xilinx Artix-7 or Intel Cyclone V FPGAs in industrial controllers. IC Role / Device Role / Timing Role: High-efficiency, fast-transient buck converter supporting dynamic voltage scaling during configuration and runtime. Use Value: 1ms soft-start prevents inrush current into FPGA bulk capacitance; COT control maintains <±1% regulation during 100ns logic transitions. |
| Network Router PoL | Smart Home Appliance MCU Supply |
|
Use Scenario: Delivering 5V/3.3V to Ethernet PHYs, packet processors, and Wi-Fi modules in enterprise-grade routers. IC Role / Device Role / Timing Role: Secondary buck stage stepping down 12V bus to isolated logic rails with low-noise, high PSRR performance. Use Value: 800kHz fixed-frequency operation avoids interference with 2.4GHz/5GHz RF bands; 190μA IQ extends standby time in low-power sleep modes. |
Use Scenario: Powering ARM Cortex-M7 microcontrollers and sensor interfaces in refrigerators, washing machines, and HVAC controllers. IC Role / Device Role / Timing Role: Main system supply with wide-input tolerance to accommodate unregulated 12V battery or rectified AC inputs. Use Value: UVLO programmability allows custom brownout thresholds matching appliance line-voltage tolerances; AEC-Q200 qualification available per request. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power) | 3A rated, 4.5–36V input, 500kHz fSW, no integrated BST capacitor requirement. | Lacks proprietary EMI suppression; higher RDS(ON) (75mΩ HS) reduces efficiency above 2A. | Select when wider input range (>18V) is required and EMI filtering budget allows external solutions. |
| TPS54332DDAR (Texas Instruments) | 3A rated, 3.5–28V input, adjustable soft-start, external compensation, 600kHz fSW. | Requires external MOSFETs and compensation network-increases BOM count and layout complexity. | Choose when design flexibility (e.g., custom loop tuning or higher VIN) outweighs integration benefits. |
Compared with MP2451DT-LF-Z and TPS54332DDAR, AP62400WU-7 delivers higher output current (4A vs. 3A), superior EMI performance without external filters, and lower component count-making it optimal for space-constrained, high-efficiency 5V/12V PoL designs where thermal and radiated noise margins are critical.
Availability
AP62400WU-7 is available at Aetrix Electronics and suitable for flat-panel displays, FPGA power delivery, and network infrastructure equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for AP62400WU-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices, with emphasis on power management, signal integrity, and protection solutions.
AP62400WU-7 belongs to Diodes' AP62xxx family of high-efficiency, EMI-optimized synchronous buck converters designed for consumer, industrial, and networking applications demanding compact size, low quiescent current, and robust protection.
FAQ
What is the minimum recommended input voltage for reliable operation?
The AP62400WU-7 has a guaranteed operating minimum input voltage of 4.2V per datasheet specifications. Below this level, undervoltage lockout activates at 3.6V falling threshold, disabling the converter. Operation below 4.2V may result in reduced output current capability or instability due to insufficient headroom for the internal LDO and gate drivers.
Can the AP62400WU-7 be used in automotive applications?
The AP62400WU-7 is not AEC-Q100 qualified by default, but Diodes Incorporated offers automotive-grade variants (e.g., AP62400WUQ-7) with PPAP capability, IATF 16949 manufacturing, and extended temperature validation. Standard AP62400WU-7 is rated for –40°C to +85°C ambient and supports automotive infotainment and body electronics when qualified per customer-specific requirements.
How does the BST capacitor value affect performance?
A 100nF X7R ceramic capacitor between BST and SW is mandatory to sustain high-side MOSFET gate drive during continuous conduction. Undersizing causes gate underdrive, increased RDS(ON), and thermal stress; oversizing adds unnecessary cost and board area without benefit. Placement within 2mm of the BST/SW pins is critical for low-inductance bootstrap loop.
Is the AP62400WU-7 pin-compatible with the AP62401WU-7?
Yes-AP62400WU-7 and AP62401WU-7 share identical TSOT26 pinout, package, and electrical interface. The key difference is light-load behavior: AP62400 uses PFM mode (190μA IQ) for efficiency, while AP62401 remains in PWM mode (440μA IQ) for tighter output ripple and faster transient response at all loads.
AP62400WU-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.2V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 4A
- Frequency - Switching:
- 800kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-26
AP62400WU-7 FAQ
1.How can I place an order for AP62400WU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP62400WU-7 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 AP62400WU-7 reliable?
The price and inventory of AP62400WU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP62400WU-7 is usually 5 days.
3.What payment methods are accepted for AP62400WU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP62400WU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP62400WU-7?
AP62400WU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP62400WU-7 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 AP62400WU-7?
For technical support, including AP62400WU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP62400WU-7 requirements.
6.How does Aetrix verify that AP62400WU-7 is sourced from the original manufacturer or authorized distributors?
All AP62400WU-7 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 AP62400WU-7 meets industry standards.
7.What is the process for return or replacement of AP62400WU-7?
All AP62400WU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP62400WU-7, 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 AP62400WU-7 part is unused and in its original packaging.
Return procedure for AP62400WU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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