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AP63203WU-7

DIOAP63203WU-7

Diodes Incorporated
Buck Switching Regulator IC Positive Fixed 3.3V 1 Output 2A SOT-23-6 Thin, TSOT-23-6
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Overview

The AP63203WU-7 is a 2A, synchronous buck converter with a wide input voltage range of 3.8V to 32V and a fixed 3.3V output. It utilizes a high switching frequency of 1.1MHz to minimize the size of external components and integrates frequency spread spectrum (FSS) technology to reduce EMI.

Why Choose This Part

This regulator features a low 22uA quiescent current and a high 1.1MHz switching frequency, allowing for the use of small surface-mount inductors. It includes built-in frequency spread spectrum (FSS) and a optimized gate driver to significantly lower radiated EMI, which simplifies PCB layout and shielding requirements.

Applications

12V/24V Distributed Power Bus
Ideal for stepping down industrial or automotive power rails to a stable 3.3V logic supply.
Home Appliances
Provides efficient power conversion for control boards in white goods with low standby power requirements.
EMI-Sensitive Electronics
Utilizes FSS and a proprietary gate driver design to pass stringent EMC standards without bulky filtering.
Battery-Powered Tools
The 22uA low quiescent current helps preserve battery life in standby or light-load conditions.

Key Specifications

Function Step-Down
Topology Buck
Output Type Fixed
Mounting Type Surface Mount
Package / Case SOT-23-6 Thin, TSOT-23-6
Current - Output 2A
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 1.1MHz
Operating Temperature -40degC ~ 85degC (TA)
Synchronous Rectifier Yes
Voltage - Input (Max) 32V
Voltage - Input (Min) 3.8V
Supplier Device Package TSOT-23-6
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this part, place a 10uF or larger ceramic input capacitor as close as possible to the VIN and GND pins. Ensure the inductor and output capacitor are rated for at least 2A peak current and the expected 3.3V output voltage. Refer to the AP63203 evaluation board documentation for optimized thermal and EMI layout patterns.

Part of Diodes Inc AP6320 family » AP6320

AP6320 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Output Type Sw. Freq Output V Stock
AP63203WU-7 (this part) Fixed 1.1M 3.3V —
AP63200WU-7 Adjustable 500k 1.2V 37,689
AP63201WU-7 Adjustable 500k 1.2V 2,584

Also Consider

AP63200WU-7 DIODiodes Incorporated - An adjustable version of the same series for designs requiring output voltages other than 3.3V.
MP2315 MPSMonolithic Power Systems (MPS) - Provides a similar 3A high-efficiency buck solution in a compact TSOT23-8 package.