AP63203WU-EVM Diodes Incorporated

AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction DESCRIPTION The AP63203 is a 2A, synchronous buck with a switching frequency jitter of 6%, converter with a wide input voltage range of which reduces EMI by not allowing emitted 3.8V to 32V and fully integrates a 125m energy to stay in any one frequency for a high-side power MOSFET and a 68m low- significant period of time. It also has a side power MOSFET to provide high- proprietary gate driver scheme to resist efficiency step-down DC/DC conversion. switching node ringing without sacrificing MOSFET turn-on and turn-off times, which The AP63203 device is easily used by further reduces high-frequency radiated EMI minimizing the external component count noise caused by MOSFET switching. due to its adoption of peak current mode control along with its integrated The device is available in a low-profile, compensation network. TSOT26 package. The AP63203 is fixed output buck converters with Electromagnetic Interference (EMI) reduction. The converter features Frequency Spread Spectrum (FSS) FEATURES VIN 3.8V to 32V Frequency Spread Spectrum 2A Continuous Output Current (FSS) to Reduce EMI 0.8V 1% Reference Voltage Low-Dropout (LDO) Mode 22A Ultralow Quiescent Current Precision Enable Threshold to (Pulse Frequency Modulation) Adjust UVLO 1.1MHz Switching Frequency Protection Circuitry Supports Pulse Frequency o Undervoltage Lockout Modulation (PFM) and Pulse (UVLO) Width Modulation (PWM) o Cycle-by-Cycle Peak Proprietary Gate Driver Design for Current Limit o Thermal Shutdown Best EMI Reduction 1 of 7 AP63203WU-EVM June 2019 Diodes Incorporated www.diodes.com Document number: Rev. 1 - 0 AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction APPLICATIONS 12V and 24V Distributed Power Bus Supplies Flat Screen TV Sets and Monitors Power Tools and Laser Printers White Goods and Small Home Appliances FPGA, DSP, and ASIC Supplies Home Audio Network Systems Set Top Boxes Gaming Consoles Consumer Electronics FUNCTIONAL BLOCK 2 0.4V Internal EN 0.8V + ON Reference 20k 1.1V 1.18V - 3 V CC VIN Regulator 1.5uA 4uA + OVP 0.88V - R = 0.xxV/A T S = 0.9V/T E 1 FB UVP Oscillator + + 1.MHz 5V - 6 BST OCP Ref - HS Logic + COMP 0.8V + gm - PWM 5 + Internal SS Comparator 18k SW Error Amplifier 7.6nF LS 4 GND Figure 1. Functional Block Diagram ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit -0.3 to +35.0 (DC) VIN Supply Voltage V -0.3 to +40.0 (400ms) V Switch Node Voltage -1.0 to VIN + 0.3 (DC) V SW 2 of 7 AP63203WU-EVM June 2019 Diodes Incorporated www.diodes.com Document number: Rev. 1 - 0 - +