Diodes IncorporatedAP66200QFVBW-13 | Automotive Synchronous Buck ConverterConvertisseur CC en CC et puce de régulateur de commutation

AP66200Q adjustable switching frequency, internally compensated, automotive-compliant synchronous DC-DC buck converter

The automotive-compliant AP66200Q and AP66300Q are 2A and 3A synchronous buck converters, each with a wide input voltage range of 3.8V to 60V. Their wide operating voltage range and small footprint make them suitable for a large selection of automotive point-of-load (PoL) applications.

These integrated power MOSFET switches (120mΩ high-side and 55mΩ low-side for AP66300Q, 185mΩ high-side and 80mΩ low-side for AP66200Q) provide high-efficiency step-down conversion. Their BIAS feature further enhances device efficiency, helping reduce internal power consumption.

Both parts minimize external component count by adopting peak current mode control coupled with integrated loop compensation network, making them easier to use. Their output stages are optimized for electromagnetic interference (EMI) reduction.

The devices have adjustable switching frequencies (up to 2.5MHz), which can be synchronized to an external clock. Their multifunction synchronization pins set the devices to operate in pulse frequency modulation (PFM) (high light-load efficiency) or pulse width modulation (PWM) for low-output ripple. Both devices offer adjustable soft-start to reduce inrush current and tracking for power sequencing.

Their high level of integration simplifies board layout and reduces space requirements with minimal need for external components, making it ideal for distributed power architectures.

The AP66200Q/300Q are available in the wettable flank U-QFN4040-16/SWP (Type UXB) package supporting automatic optical inspection (AOI).

The DIODES Advantage

The AP66200Q and AP66300Q provide high-efficiency DC-DC conversion for automotive 24V and 12V PoL applications.

• Wide 3.8V to 60V Input Voltage Range
  • Works across the full ICE (internal combustion engine) automotive voltage range including load dump
• High Switching Frequency up to 2.5MHz
  • Beyond MW (medium wave) band frequency delivers a reduced solution footprint
• Low (43μA) Quiescent Current (IQ) and 2.2μA Shutdown Current (ISHDN)
  • Enables systems to meet <100µA standby requirements of many automotive applications
• Adjustable PFM/PWM Operation with BIAS Pin
  • Allows designers to optimize overall performance to meet system needs with reduced internal power dissipation
• Small Footprint U-QFN4040-16/SWP (Type UXB)
  • High-power-density power conversion supports AOI assembly

Applications

Automotive PoL conversion in:

• Body control electronics
• Infotainment
• Instrument clusters
• Telematics
• Interior and exterior lighting
• AAdvanced driver assistance systems (ADAS)