Diodes Incorporated AP63300WU-7 Product Information

General Description

The AP63300WU-7 is a high-efficiency, synchronous buck converter designed for a wide input voltage range of 3.8V to 32V. It features a 3A continuous output current capability and integrates a 75mΩ high-side power MOSFET and a 40mΩ low-side power MOSFET to achieve high efficiency step-down DC-DC conversion. The device is optimized for Electromagnetic Interference (EMI) reduction, making it suitable for applications requiring low EMI noise.

Key Features

• Wide Input Voltage Range: 3.8V to 32V
• 3A Continuous Output Current
• Low Quiescent Current: 22μA in Pulse Frequency Modulation (PFM) mode
• Fixed 500kHz Switching Frequency
• Enhanced EMI Reduction: Proprietary gate driver scheme and Frequency Spread Spectrum (FSS)
• High Efficiency: Up to 88% at 5mA light load
• Low-Dropout (LDO) Mode
• Precision Enable Threshold for adjustable UVLO
• Protection Circuitry: Undervoltage Lockout (UVLO), Output Overvoltage Protection (OVP), Cycle-by-Cycle Peak Current Limit, Thermal Shutdown
• RoHS Compliant: Lead-free, Halogen-free, Antimony-free "Green" device

Applications

• 5V, 12V, and 24V Distributed Power Bus Supplies
• Flat Screen TVs and Monitors
• Power Tools and Laser Printers
• Home Audio Systems
• Network Systems
• Gaming Consoles
• Consumer Electronics

Pin Descriptions

TableCopy

Electrical Characteristics

Supply Voltage (VIN)

• Min: 3.8V
• Max: 32V

Supply Current (ISHDN)

• Typ: 1μA (shutdown mode)
• Typ: 22μA (PFM mode)

Supply Current (IQ)

• Typ: 280μA (PWM mode)

High-Side Power MOSFET RDS(ON)

• Typ: 75mΩ

Low-Side Power MOSFET RDS(ON)

• Typ: 40mΩ

Switching Frequency (fSW)

• Typ: 500kHz

Feedback Voltage (VFB)

• Typ: 0.8V

Enable Logic High (VEN_H)

• Min: 1.18V

Enable Logic Low (VEN_L)

• Max: 1.09V

Thermal Shutdown Threshold (TSD)

• Min: 160°C

Functional Description

The AP63300WU-7 employs fixed-frequency peak current mode control and integrates a loop compensation network to simplify the external component count. It features a built-in soft-start time of 4ms to prevent output voltage overshoot and inrush current. The device operates in PWM mode at light loads to maintain high efficiency. The proprietary gate driver scheme ensures a ringing-free switching node, reducing EMI noise.

EMI Reduction

• Proprietary Gate Driver Scheme: Reduces high-frequency radiated EMI noise.
• Frequency Spread Spectrum (FSS): ±6% switching frequency jitter to spread EMI over a wider frequency band.

Protection Features

• Undervoltage Lockout (UVLO): Prevents operation below the minimum input voltage.
• Output Overvoltage Protection (OVP): Limits output voltage overshoot during load transients.
• Cycle-by-Cycle Peak Current Limit: Protects against overcurrent conditions.
• Thermal Shutdown: Protects the device from overheating.

Ordering Information

• Part Number: AP63300WU-7
• Package: TSOT26
• Packing: Tape & Reel (3000 units per reel)
• Operation Mode: PFM/PWM
• FSS Feature: Yes
• Package Code: WU

Marking Information

• Identification Code: T6
• Year and Week Code: YW (e.g., 9A for 2019, Week 1)

Package Outline

• Dimensions: TSOT26 package
• Recommended Pad Layout: Available on Diodes Incorporated website