AP63301WU-7 - 3A, 32V Sync Buck Converter, TSOT-23-6 | Diodes Inc
Teilenummer: AP63301WU-7 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 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 |
AP63301WU-7 Übersicht
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.
Drop-in-Alternativen für AP63301WU-7 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AP63301WU-7 (gleiche Bauform und Footprint) – abweichend in Continuous Output Current, Package, Quiescent Current.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
AP63300WU-7
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP63205WU-7
✅ Drop-In✓ Auf Lager
$0.2036 / Stück
Datenblatt ansehen →AP63210WU
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AP63301WU-7 Grenzwerte & elektrische Eigenschaften
| Topologie | Synchronous Buck (Step-Down) |
| Eingangsspannungsbereich | 3.8 V to 32 V |
| Ausgangsspannungsbereich | 0.8 V to ~28 V (adjustable) |
| Continuous Output Current | 3 A |
| High-Side MOSFET | 75 mΩ (typ.) |
| Low-Side MOSFET | 40 mΩ (typ.) |
| Ruhestrom | 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) |
| Sanftanlauf | Internal |
| Protections | OCP, OVP, UVLO, Thermal Shutdown |
| Betriebs-Sperrschichttemperatur | -40 °C to +125 °C |
| Gehäuse | TSOT-23-6 (TSOT26) with exposed pad |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
AP63301WU-7 Pin-Konfiguration
| Pin 1 | EN — Enable input (active high; tie to VIN for auto-startup; rising threshold typ. 1.18 V) |
| Pin 2 | GND — Power and analog ground return |
| Pin 3 | SW — Switch node - connection point of the internal high-side / low-side MOSFETs and external inductor |
| Pin 4 | VIN — Input supply voltage, 3.8 V to 32 V |
| Pin 5 | BST — Bootstrap pin for high-side gate driver; connect to SW via 100 nF bootstrap capacitor |
| Pin 6 | FB — Feedback input to internal error amplifier; connect to VOUT resistor divider (VREF = 0.8 V typ.) |
Typische Anwendungen
AP63301WU-7 ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AP63301WU-7 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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 |
Wichtigste Unterscheidungsmerkmale
- 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)
Designhinweise
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.
Compliance-Informationen
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.
