Diodes Incorporated の AP63301WU-7 - 3A, 32V Sync Buck Converter, TSOT-23-6 | Diodes Inc AP63301WU-7 - 電子部品
Diodes Incorporated

AP63301WU-7 - 3A, 32V Sync Buck Converter, TSOT-23-6 | Diodes Inc

部品番号: AP63301WU-7 ✓ 生産中
在庫あり 1〜3営業日以内に発送
3.8 V to 32 V Vdss 3 A Id TSOT-23-6 (TSOT26) with exposed pad Package
開始価格 $0.35 USD / 個
MOQ: 1 |
価格更新日: 2026-10-06
ボリューム価格
数量 単価 小計
1 $0.8 $0.80
10 $0.69 $6.90
100 $0.55 $55.00
500 $0.46 $230.00
1,000 $0.4 $400.00
3,000 $0.35 $1,050.00
ℹ️ すべての価格はUSDです
データシートを見る (PDF) 代替品を見る

AP63301WU-7 概要

The Diodes Incorporated AP63301WU-7 is a 3 A synchronous buck (step-down) DC-DC converter with a 3.8 V to 32 V input range and an adjustable output from 0.8 V up to about 28 V, housed in a 6-pin TSOT-23-6 (TSOT26) package. It integrates a 75 mΩ high-side MOSFET and a 40 mΩ low-side MOSFET, supports up to 3 A continuous output current, and provides enhanced EMI reduction through an EMI-optimized gate driver architecture. Typical quiescent current is around 280 µA during light-load operation.

A synchronous buck converter is a switched-mode power supply topology that uses pulse-width modulation (PWM) to regulate an output voltage lower than its input, while replacing the external Schottky diode with an internal low-side MOSFET for higher efficiency. AP63301WU-7 belongs to the hierarchy: synchronous buck converter -> buck converter -> step-down regulator -> switching regulator -> DC-DC converter -> power management IC -> semiconductor IC. This category is used wherever a board needs a low-voltage rail (e.g., 3.3 V, 5 V, 12 V) generated from a higher-voltage bus (e.g., 12 V, 24 V industrial supplies), with higher efficiency than a linear regulator.

Key differentiating features include an internal high-side 75 mΩ / low-side 40 mΩ MOSFET pair, peak current-mode control with internal compensation, a 1.18 V-typical enable input that can be connected directly to VIN for automatic startup, internal soft-start, and an EMI-optimized gate driver that helps meet CISPR 25 / CISPR 22 conducted-emissions limits without complex filtering. The AP63301WU-7 is the EMI-tuned version of the family, while its sibling AP63300WU-7 adds frequency spread spectrum.

Technically, the device operates at a fixed switching frequency, uses peak current-mode control for fast transient behavior and simple loop compensation, and provides cycle-by-cycle current limit, thermal shutdown, and over-voltage protection. The TSOT-23-6 package with an exposed thermal pad keeps junction-to-ambient resistance low enough for 3 A operation at moderate VIN-VOUT differentials without external heatsinking.

Typical applications include 12 V and 24 V industrial bus point-of-loads, USB-PD / Type-C charging rails, white goods and home appliance power, telecom 5 V/3.3 V auxiliary supplies, and FPGA/MCU core or I/O rails. Compared with linear regulators, AP63301WU-7 dramatically lowers the heat dissipated when stepping 24 V to 5 V at 3 A.

Designers should size the input capacitor for RMS current, select the output inductor for approximately 20-40% ripple, and follow the datasheet feedback-resistor table to program the output between 0.8 V and roughly VIN minus losses. This page synthesizes distributor pricing, drop-in TSOT-23-6 alternatives, and practical design notes not found in the manufacturer datasheet alone.

ドロップイン代替品: AP63301WU-7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。

このシリーズのバリエーション

同一シリーズでドロップイン互換のモデル: AP63301WU-7 （同一形状・フットプリント） — 相違点: Continuous Output Current, Package, Quiescent Current.

Diodes Incorporated
Continuous Output Current: 2 A
Package: TSOT-23-6 (TSOT26)
Quiescent Current: 22 µA
比較対象 AP63301WU-7 →

クイック比較ツール — 並列比較する代替部品を選択:

AP63300WU-7

✅ ドロップイン
📦 TSOT-23-6
same die/package, adds frequency spread spectrum, IQ 22 µA vs 280 µA

📋 参考代替品（カタログ未掲載）

AP63205WU-7

✅ ドロップイン
Diodes Incorporated
📦 TSOT-23-6
Synchronous Buck (Step-Down) · 3.8 V to 32 V · Fixed 5 V · 2 A · 1.1 MHz · 125 mΩ · 68 mΩ · 22 µA

✓ 在庫あり

$0.2036 / 個

データシートを見る →

AP63210WU

✅ ドロップイン
📦 TSOT-23-6
1 A IOUT vs 3 A (-67%, below drop-in floor for output current)

📋 参考代替品（カタログ未掲載）

AP63301WU-7 最大定格＆電気的特性

トポロジー Synchronous Buck (Step-Down)
入力電圧範囲 3.8 V to 32 V
出力電圧範囲 0.8 V to ~28 V (adjustable)
Continuous Output Current 3 A
High-Side MOSFET 75 mΩ (typ.)
Low-Side MOSFET 40 mΩ (typ.)
静止電流 280 µA (typ., no load)
Control Mode Peak Current-Mode PWM
Feedback Voltage Reference 0.8 V (typ.)
Enable Threshold (Rising) 1.18 V (typ.)
EMI Reduction EMI-optimized gate driver (no FSS)
ソフトスタート Internal
Protections OCP, OVP, UVLO, Thermal Shutdown
動作接合温度 -40 °C to +125 °C
パッケージ TSOT-23-6 (TSOT26) with exposed pad
実装タイプ Surface Mount
RoHS ステータス Compliant

AP63301WU-7 ピン構成

SOT-23-6 Package Pinout Diagram SOT-23-6 6-pin surface mount IC, JEDEC MO-178AB. Pin 1 by dot. 1 2 3 4 5 6 SOT-23-6
ピン 1 EN — Enable input (active high; tie to VIN for auto-startup; rising threshold typ. 1.18 V)
ピン 2 GND — Power and analog ground return
ピン 3 SW — Switch node - connection point of the internal high-side / low-side MOSFETs and external inductor
ピン 4 VIN — Input supply voltage, 3.8 V to 32 V
ピン 5 BST — Bootstrap pin for high-side gate driver; connect to SW via 100 nF bootstrap capacitor
ピン 6 FB — Feedback input to internal error amplifier; connect to VOUT resistor divider (VREF = 0.8 V typ.)

主な用途

AP63301WU-7 の用途: 6 件s: 24V Industrial Bus Point-of-Load, USB-PD / Type-C Charging Rails, Home Appliance & White Goods Power, Telecom Auxiliary Supplies, FPGA / MCU Power Rails, Automotive Accessory Power (Non-Safety).

🏭

24V Industrial Bus Point-of-Load

The AP63301WU-7's 3.8 V to 32 V VIN window directly accepts the 24V industrial bus and steps it down to 3.3V, 5V, or 12V rails without a pre-regulator. With 3 A capability and a 75 mΩ/40 mΩ MOSFET pair, it delivers 3.3V at 3 A from 24V input with roughly 90% efficiency and under 1 W dissipation. Its EMI-optimized gate driver helps meet CISPR 11/22 Class B in PLC, sensor, and motor-drive subsystems without complex input filtering.

おすすめ

AP63300WU-7 (Same family, adds frequency spread spectrum) AP63205WU-7 · Diodes Incorporated
⚡

USB-PD / Type-C Charging Rails

USB-PD chargers require a buck converter that can take a 5V to 20V bus and produce 5V, 9V, 15V, or 20V outputs at 2 A to 3 A. The AP63301WU-7's 32V VIN tolerance and 3 A IOUT deliver USB-PD 60W capability in a TSOT-23-6 footprint, ideal for compact travel adapters and Type-C docks. The internal compensation and peak current-mode control simplify the loop design, while OVP and OCP safeguard the cable and downstream device.

おすすめ

AP63300WU-7 (Drop-in with FSS for EMI-sensitive Type-C applications)
🔧

Home Appliance & White Goods Power

White goods such as washing machines, refrigerators, and dishwashers run from rectified 12V or 24V rails and need 3.3V, 5V, and 12V subsystems at 1 A to 3 A. The AP63301WU-7's TSOT-23-6 package fits small control boards, and its -40 °C to +125 °C junction range handles appliance thermal stress. EMI-optimized switching passes CISPR 14-1 conducted emissions without a complex pi-filter on VIN.

おすすめ

AP63300WU-7 (Family part for spread-spectrum EMI reduction)
🌐

Telecom Auxiliary Supplies

Telecom 48V systems use intermediate 12V or 5V rails for fans, microcontrollers, and housekeeping circuitry. The AP63301WU-7 directly accepts a 24 V to 32 V telecom tap and produces 5 V at 3 A for fans and control logic. Synchronous rectification keeps efficiency high at the 32V-max VIN, while internal OVP/OCP protects downstream ASICs during transient bus events.

おすすめ

AP63300WU-7 (FSS-enabled variant for telecom EMI compliance)
🖥️

FPGA / MCU Power Rails

Modern FPGAs and high-performance MCUs require low-voltage, high-current cores (e.g., 1.0V, 1.2V, 3.3V) generated from a 5V or 12V rail. The AP63301WU-7's 0.8V reference and 3 A capability easily power a 1.2V/2 A core or 3.3V/3 A I/O rail. Peak current-mode control with internal compensation delivers fast load-step behavior when the SoC wakes from sleep.

おすすめ

AP63300WU-7 (Drop-in sibling with frequency spread spectrum)
🚗

Automotive Accessory Power (Non-Safety)

12V automotive rails see 6V cranking dips up to 18V load-dump transients. The AP63301WU-7's 32V absolute-maximum VIN tolerates load-dump, while its 3.8V minimum starts cleanly during cranking. The TSOT-23-6 footprint is well-suited to infotainment, ambient lighting, and accessory USB hubs. For safety-critical powertrain or ADAS rails, an AEC-Q100-qualified part is recommended instead.

おすすめ

AP63300WU-7 (Family part for spread-spectrum EMI reduction)

おすすめ製品の概要

AP63300WU-7 Same family, adds frequency spread spectrum 使用用途: 24V Industrial Bus Point-of-Load, USB-PD / Type-C Charging Rails, Home Appliance & White Goods Power, Telecom Auxiliary Supplies, FPGA / MCU Power Rails, Automotive Accessory Power (Non-Safety) AP63205WU-7 Diodes Incorporated 使用用途: 24V Industrial Bus Point-of-Load
What is the input voltage range of AP63301WU-7?
The AP63301WU-7 operates from 3.8 V to 32 V on the VIN pin. According to the Diodes Incorporated AP63300/AP63301 datasheet, this wide VIN window makes the part well-suited to 12 V and 24 V industrial bus rails as well as multi-cell battery and automotive cold-crank profiles up to the 32 V absolute maximum. UVLO at roughly 3.4 V prevents boost-mode start-up into a shorted load.
How much output current can AP63301WU-7 deliver?
The AP63301WU-7 is rated for 3 A continuous output current. The fully integrated 75 mΩ high-side and 40 mΩ low-side MOSFET pair allow the part to handle 3 A with only modest thermal derating on the TSOT-23-6 land pattern. For 3 A at 24 V to 5 V, the device typically dissipates roughly 0.7 W, achievable on a standard 1 oz copper 4-layer PCB.
Is AP63301WU-7 pin-compatible with AP63300WU-7?
Yes. AP63301WU-7 is pin-to-pin compatible with AP63300WU-7 in the TSOT-23-6 package. The two parts share the same datasheet (AP63300/AP63301); the difference is that AP63300 adds frequency spread spectrum (FSS) while AP63301 omits FSS and instead uses a fixed-frequency, EMI-optimized gate driver. They are drop-in equivalents for most applications; choose AP63301 where fixed-frequency behavior is preferred, AP63300 where FSS is needed.
What is the output voltage range of AP63301WU-7?
The AP63301WU-7 output is adjustable from 0.8 V up to approximately 28 V via an external resistor divider on the FB pin. The internal reference is 0.8 V typ., so VOUT = 0.8 V × (1 + R1/R2). For common rails, choose 3.3 V, 5 V, 12 V, or 15 V outputs by selecting divider resistors per the datasheet feedback design table, ensuring the programmed value does not exceed roughly VIN - load_drop.
Where to buy AP63301WU-7 online and what is the price?
The AP63301WU-7 is in stock at DigiKey, Mouser, LCSC, and other franchised distributors, with typical 1-piece unit prices near $0.80 and 3000-piece reel pricing around $0.35, as of 2026-10-06. XAIPART also lists AP63301WU-7 with quantity-break pricing. Lead time for stock quantities is generally same-day to 8 weeks, depending on the distributor and reel size.
What is the lead time for AP63301WU-7 from Diodes Incorporated?
Factory lead time for AP63301WU-7 is typically 8 to 12 weeks when ordered through franchised distributors in 3 k reel quantities. Distributor stock from DigiKey and Mouser often ships the same day for small quantities, as of 2026-10-06. For production volumes above 30 k units, contact Diodes Incorporated sales directly for scheduled factory orders.
AP63301WU-7 vs AP63300WU-7 - which is better for an EMI-sensitive design?
The AP63301WU-7 uses an EMI-optimized gate driver without frequency spread spectrum, while AP63300WU-7 adds FSS to spread switching noise over a wider band. For CISPL conducted emissions compliance with fixed-frequency clocking requirements (e.g., when interfacing with sensitive analog or RF blocks), AP63301WU-7 is often preferred. For lowest peak EMI in radiated scans, AP63300WU-7 typically has the edge; both parts share the same TSOT-23-6 footprint.
When should I choose AP63301WU-7 over a linear regulator?
Choose AP63301WU-7 instead of a linear regulator when stepping a high VIN to a low VOUT at currents around 1 A or higher, where a linear regulator would dissipate too much heat. At 12 V to 3.3 V at 2 A, a linear regulator would dissipate 17.4 W, while AP63301WU-7 typically dissipates under 1 W. For 100 mA rails or VIN-VOUT differentials under 1 V, a linear LDO remains the right choice.
What is the best drop-in replacement for AP63301WU-7?
The closest drop-in replacement for AP63301WU-7 in the same TSOT-23-6 footprint is AP63300WU-7, which is the same silicon with frequency spread spectrum enabled. For cross-brand drop-in parts in TSOT-23-6, candidates from distributor parametric search include TPS54302DDC and LMR16006XDDCR-style parts; pin-by-pin compatibility must be verified against the target PCB layout before substitution.
Is there a Texas Instruments cross-brand equivalent for AP63301WU-7?
The closest Texas Instruments cross-brand equivalent for AP63301WU-7 in the TSOT-23-6 / SOT-23-6 footprint is the TPS54302DDC family (3 A, 28 V, TSOT-23-6) or TPS54331DR if a SO PowerPAD footprint is acceptable. Both TI parts share 3 A capability and a similar VIN window. Verify enable polarity, FB reference, and switching frequency against the AP63301WU-7 design before PCB drop-in substitution.
Where to download the AP63301WU-7 datasheet PDF?
The AP63301WU-7 datasheet is hosted on the Diodes Incorporated product page at https://www.diodes.com/datasheet/download/AP63300_AP63301.pdf. The PDF covers the AP63300 and AP63301 family and includes the pinout, electrical characteristics, typical application circuit, and PCB layout guidelines. Octopart and DigiKey also mirror the datasheet for offline reference.
Where to find the AP63301WU-7 pinout?
The AP63301WU-7 pinout is documented on page 1 of the AP63300/AP63301 datasheet hosted at https://www.diodes.com/datasheet/download/AP63300_AP63301.pdf. The TSOT-23-6 pinout is: 1 EN, 2 GND, 3 SW, 4 VIN, 5 BST, 6 FB. Always cross-check the datasheet revision before finalizing PCB layout.
What are the key specifications of AP63301WU-7 engineers should know?
The AP63301WU-7 key specifications are: 3.8 V to 32 V VIN, 3 A continuous IOUT, 0.8 V to ~28 V VOUT adjustable, 75 mΩ high-side + 40 mΩ low-side integrated MOSFETs, 280 µA typ. quiescent current, peak current-mode control with internal compensation, EMI-optimized gate driver (no FSS), TSOT-23-6 package, and protections for OCP/OVP/UVLO/Thermal Shutdown. The combination of wide input window, high efficiency, and tiny footprint is the defining value proposition.
Can AP63300WU-7 replace AP63301WU-7 on the same PCB?
Yes, AP63300WU-7 is pin-to-pin compatible with AP63301WU-7 in the same TSOT-23-6 footprint and can replace AP63301WU-7 on the same PCB without layout changes. The functional difference is that AP63300WU-7 adds frequency spread spectrum for lower peak EMI, while AP63301WU-7 omits FSS for fixed-frequency operation. Both share the same 3.8 V to 32 V VIN range and 3 A output capability.
What is the quiescent current of AP63301WU-7 at no load?
The AP63301WU-7 quiescent current is approximately 280 µA typ. at no load, according to the Diodes Incorporated AP63300/AP63301 datasheet. This figure is higher than the AP63300WU-7 family (22 µA typ.) because AP63301 omits the FSS low-Icquencer sub-block. 280 µA is acceptable for always-on industrial and appliance rails but less suitable for battery-powered standby applications where every microampere matters.

エンジニアリング参考データ: AP63301WU-7 — 比較、設計ガイダンス、コンプライアンス情報。

選定ガイド

Choose AP63301WU-7 when you need a 3 A synchronous buck in a tiny TSOT-23-6 footprint that can directly accept a 24 V industrial or 28 V telecom rail, and when fixed-frequency switching is preferred for noise-sensitive analog or RF blocks. Choose AP63300WU-7 (same package, same datasheet) when frequency spread spectrum for lowest peak EMI is the priority, or when lower 22 µA standby current matters for always-on battery-powered standby. Choose AP63205WU-7 when 2 A is sufficient, the bus is strictly 12 V or 18 V max, and a lower-cost solution is acceptable. For AEC-Q100 automotive safety rails, choose a qualified automotive part instead of AP63301WU-7. All three Diodes parts share the same TSOT-23-6 footprint, enabling layout reuse across variants.

代替品との比較

パラメータ この製品 AP63300WU-7 AP63205WU-7
Package TSOT-23-6 TSOT-23-6 - same TSOT-23-6 - same
Brand Diodes Incorporated Diodes Incorporated Diodes Incorporated
Input Voltage Range 3.8 V to 32 V 3.8 V to 32 V 3.8 V to 18 V
Continuous Output Current 3 A 3 A 2 A
AEC-Q100 Automotive Grade No No No

主な差別化要因

  • EMI-optimized gate driver without FSS （vs AP63300WU-7)
  • 3 A output current in TSOT-23-6 （vs AP63205WU-7)
  • Wide 32V VIN for industrial and telecom （vs Generic 18V buck in TSOT-23-6)

設計ノート

Place the input ceramic capacitor (≥ 10 µF X7R) directly between VIN (pin 4) and GND (pin 2) using the shortest possible trace. Place the bootstrap capacitor (100 nF) between BST (pin 5) and SW (pin 3) using a short, wide trace. The feedback divider (R1 from VOUT to FB, R2 from FB to GND) must connect to a Kelvin point after the output capacitor to prevent load-regulation errors. The exposed pad (EP) under the TSOT-23-6 must be soldered to a continuous ground copper pour to achieve rated thermal performance.

Estimated: at VIN = 24 V, VOUT = 5 V, and IOUT = 3 A, power dissipation P = (VIN - VOUT) × IOUT × (1/η - 1) ≈ 1.0 W assuming 92% efficiency. With θJA ≈ 60 °C/W on a 4-layer 1 oz JEDEC PCB, the junction rises ~60 °C above ambient; at 25 °C ambient the junction reaches ~85 °C, well within the 125 °C limit. For continuous VIN ≥ 28 V at 3 A, increase copper area or reduce VIN-VOUT differential.

Do not leave the BST pin floating - the converter will not start. Do not load the SW node with anything other than the inductor. Do not program VOUT above approximately VIN - 1.5 V or the high-side MOSFET will not turn on long enough to regulate. When using EN, ensure the source can drive above the 1.18 V rising threshold; tying EN directly to VIN is allowed because EN is a high-voltage tolerant pin. Avoid placing the feedback trace near the SW trace to prevent noise injection into the FB node.

コンプライアンス情報

RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Qualified
鉛フリー
Yes
ハロゲンフリー
Yes
紛争鉱物
Compliant

RoHS and REACH compliant per Diodes Incorporated product page. Not AEC-Q100 qualified - choose an AEC-Q100 part for automotive safety applications. Halogen-free per JEDEC JS709.

データ検証日: 2026-10-06 — データはXAIPARTの部品エンジニアリングチームによって検証・管理されています

関連検索

AP63301WU-7 AP63301WU-7 datasheet Diodes Incorporated AP63301 3A 32V synchronous buck TSOT-23-6 TSOT-23-6 DC-DC buck converter AP63301WU-7 24V to 5V industrial AP63301WU-7 vs AP63300WU-7 AP63301WU-7 drop-in replacement AP63301WU-7 buy price what is the input voltage of AP63301WU-7 AP63301WU-7 pinout TSOT-23-6 EMI-optimized buck converter 3A

関連部品&用語

Diodes Incorporated AP63301WU-7 AP63301 AP63300WU-7 AP63300 AP63205WU-7 TSOT-23-6 TSOT26 synchronous buck converter buck converter step-down regulator switching regulator DC-DC converter power management IC peak current-mode control MOSFET feedback voltage quiescent current frequency spread spectrum EMI CISPR 22 CISPR 25 RoHS REACH JEDEC industrial 24V bus USB Power Delivery
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