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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AP62401WU-7

Name: AP62401WU-7
Brand: Diodes Incorporated
SKU: AP62401WU-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP62401WU-7

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: AP62401WU-7.pdf

Description:: IC REG BUCK ADJ 4A TSOT26

Quantity:: RFQ Add To RFQ list

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Inventory:2,880

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Product details

Overview

AP62401WU-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 12V_IN/5V_OUT), 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 AP62401WU-7 datasheet, AP62401WU-7 pinout, AP62401WU-7 application, or AP62401WU-7 equivalent, this page provides verified technical context, validated pin functions, confirmed EMI-reduction architecture, real-world efficiency curves at light/heavy load, and direct alternative comparisons for automotive-grade or PFM-optimized designs.

Technical Context

The AP62401WU-7 employs Constant On-Time (COT) control with input-voltage–compensated on-time calculation (t_ON = V_OUT/(V_IN·f_SW)), enabling fast transient response and inherent loop stability without external compensation. Its multi-level gate driver suppresses SW node ringing while preserving <60ns rise/fall times.

It operates in forced PWM mode across all loads-unlike the AP62400WU-7's PFM light-load behavior-delivering consistent 50mV_PP output ripple at 4A/5V and maintaining 85%+ efficiency from 100mA to 4A. Protection includes cycle-by-cycle valley current limit (5.25A typ), thermal shutdown at +160°C, and programmable UVLO via EN pin resistor divider.

Key Specifications

Parameter	Value and Actual Design Meaning
V_IN Range	4.2V to 18V DC - supports 5V/12V distributed bus inputs without pre-regulation
I_OUT Max	4A continuous - sustains full load at +85°C ambient with TSOT26 package (θ_JA = 70°C/W)
V_FB Ref	0.800V ±1% - enables precise 3.3V/5V output setting with standard 1% feedback resistors
f_SW	800kHz typical - balances EMI performance and inductor size (2.2μH standard)
I_Q	440μA typical - fixed PWM operation increases quiescent current vs. AP62400 (190μA), but eliminates PFM noise
R_DS(ON) HS/LS	50mΩ / 22mΩ - integrated MOSFETs reduce BOM count and PCB area vs. controller+external FET solutions
EMI Mitigation	Proprietary gate driver - eliminates need for snubbers or ferrite beads in Class B EMI-compliant designs

Pinout & Package

AP62401WU-7 uses the TSOT26 surface-mount package (2.9mm × 1.6mm × 0.6mm, 0.95mm pitch), optimized for thermal dissipation and high-density layouts.

Pin/Terminal	Circuit Role	Design Meaning
GND	Power ground reference	Primary return path for high-current switching loops; must connect to large copper pour for thermal and EMI control
SW	Switching node output	Drives external inductor; requires short, low-inductance trace to minimize ringing and radiated EMI
VIN	Main power input	Accepts 4.2–18V; bypassed with ≥10μF ceramic capacitor close to pin to stabilize input during switching transitions
FB	Output voltage feedback	Senses resistive divider ratio; 0.8V reference enables adjustable V_OUT from 0.8V to 7V
EN	Enable control input	Logic-compatible (1.2V threshold); floating enables auto-start; supports UVLO programming with external resistors
BST	Bootstrap supply for HS gate	Requires 100nF ceramic capacitor to SW to sustain high-side MOSFET drive during 100% duty cycle

Key Features

Feature	Design Value
Forced PWM operation	Eliminates PFM-induced output voltage jitter and audible noise-critical for audio and RF-sensitive systems
EMI-optimized gate driver	Reduces high-frequency radiated emissions by >10dB compared to standard COT buck converters without sacrificing efficiency
Cycle-by-cycle OCP	Detects low-side MOSFET valley current; triggers hiccup mode after 2.5ms sustained overcurrent to limit thermal stress
Thermal shutdown with hysteresis	Shuts down at +160°C junction temperature; restarts automatically after +20°C cooldown-prevents latch-up in enclosed enclosures
UVLO programmability	EN pin supports custom rising/falling thresholds (e.g., 4.2V ON / 3.9V OFF) using two external resistors-enables battery undervoltage cutoff

Applications

5V Distributed Power Bus

FPGA Core Supply

Use Scenario: Powering multiple USB peripherals and interface ICs from a shared 12V rail in network switches.

IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5V at up to 4A with minimal external components.

Use Value: Achieves 88% efficiency at 3A/5V and meets CISPR-32 Class B conducted EMI limits without added filtering.

Use Scenario: Providing clean, tightly regulated core voltage (e.g., 0.85V) to Xilinx Artix-7 FPGA I/O banks.

IC Role / Device Role / Timing Role: Adjustable-output buck converter configured via FB resistor divider for precise voltage setting.

Use Value: 0.8V ±1% reference and <50mV_PP ripple at 4A ensure stable logic levels and meet FPGA VCCO tolerance requirements.

Flat Panel TV Backlight Driver

Gaming Console SoC Power

Use Scenario: Generating 3.3V bias for LED driver ICs and display timing controllers in 4K LCD TVs.

IC Role / Device Role / Timing Role: Secondary power rail generator with fast load-transient response to handle dynamic backlight dimming.

Use Value: COT control delivers <10μs recovery from 50mA→2A load steps-prevents visible flicker during scene changes.

Use Scenario: Supplying 1.2V core voltage to AMD/Qualcomm application processors in handheld gaming devices.

IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC-DC converter operating continuously under burst-load conditions.

Use Value: TSOT26 package with θ_JA = 70°C/W sustains 4A output at +70°C ambient-enables fanless thermal design.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP62400WU-7	Same pinout and package, but uses PFM at light load (190μA I_Q vs. 440μA); lower efficiency below 100mA	Better suited for battery-powered devices where ultra-low standby current is critical	Select AP62400WU-7 only if system spends >90% time at <50mA load and EMI is less constrained
MP2451DT-LF-Z	3A rated, 2.5–36V input, no BST pin (integrated bootstrap diode), 2.2MHz f_SW, no programmable UVLO	Used in industrial sensors and PoE-powered devices requiring wider VIN range and higher f_SW	Choose MP2451DT-LF-Z when input exceeds 18V or board space demands smaller inductors (higher f_SW)

Compared with AP62400WU-7, AP62401WU-7 trades 250μA higher quiescent current for deterministic PWM behavior and superior EMI control; versus MP2451DT-LF-Z, it offers higher current, lower EMI, and flexible UVLO-but requires external BST capacitor and lacks 36V input capability.

Availability

AP62401WU-7 is available at Aetrix Electronics and suitable for FPGA power delivery, flat-panel TV subsystems, and gaming console SoC supplies requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned manufacturing rigor.

Supply support for AP62401WU-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 company specializing in discrete, analog, and mixed-signal ICs, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for automotive-grade reliability.

The AP62400/AP62401 series belongs to Diodes' high-efficiency power management portfolio, designed specifically for EMI-sensitive consumer and industrial point-of-load applications demanding compact size, fast transient response, and robust protection.

FAQ

What is the key functional difference between AP62401WU-7 and AP62400WU-7?

The AP62401WU-7 operates exclusively in forced PWM mode across all load conditions, ensuring consistent switching frequency and eliminating PFM-related output voltage jitter. In contrast, the AP62400WU-7 enters PFM mode below ~100mA to achieve lower quiescent current (190μA vs. 440μA). This makes AP62401WU-7 preferable for noise-sensitive applications like audio amplifiers or RF receivers, while AP62400WU-7 suits battery-powered systems prioritizing standby efficiency.

Can AP62401WU-7 be used to generate 1.2V output for an SoC core rail?

Yes. The AP62401WU-7 supports adjustable output voltages from 0.8V to 7V using an external resistor divider on the FB pin. For a 1.2V output, use R1 = 100kΩ and R2 = 200kΩ (standard 1% values), yielding V_OUT = 0.8V × (1 + R1/R2) = 1.2V. The 0.8V ±1% internal reference ensures ≤±12mV output error at room temperature, meeting typical SoC core rail tolerances.

How does the proprietary gate driver reduce EMI without degrading efficiency?

The gate driver uses multi-level slew-rate control: it applies full drive strength during initial turn-on/turn-off for minimal conduction loss, then reduces gate current mid-transition to damp ringing at the SW node. This preserves MOSFET switching speed (t_r/t_f < 60ns) while suppressing >100MHz radiated harmonics-verified by 10dB reduction in peak EMI amplitude versus standard COT converters-without increasing R_DS(ON) or conduction losses.

Is AP62401WU-7 qualified for automotive applications?

The AP62401WU-7 itself is not AEC-Q100 qualified; however, Diodes Incorporated manufactures it in IATF 16949-certified facilities and offers automotive-grade variants (e.g., AP62401WUQ-7) with full AEC-Q100 Grade 1 qualification, PPAP documentation, and extended temperature validation (–40°C to +125°C). For non-automotive industrial or consumer use, the standard AP62401WU-7 meets RoHS, REACH, and halogen-free requirements per Diodes' Green policy.

AP62401WU-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOT-23-6 Thin, TSOT-23-6

Packaging:: Tape & Reel (TR)

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

AP62401WU-7 FAQ

1.How can I place an order for AP62401WU-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP62401WU-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 AP62401WU-7 reliable?

The price and inventory of AP62401WU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP62401WU-7 is usually 5 days.

3.What payment methods are accepted for AP62401WU-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP62401WU-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP62401WU-7?

AP62401WU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP62401WU-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 AP62401WU-7?

For technical support, including AP62401WU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP62401WU-7 requirements.

6.How does Aetrix verify that AP62401WU-7 is sourced from the original manufacturer or authorized distributors?

All AP62401WU-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 AP62401WU-7 meets industry standards.

7.What is the process for return or replacement of AP62401WU-7?

All AP62401WU-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP62401WU-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 AP62401WU-7 part is unused and in its original packaging.

Return procedure for AP62401WU-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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