Diodes Incorporated’s Automotive-Compliant, 40V, 5A, Synchronous Buck Converters Deliver High Efficiency

The automotive-compliant AP64500Q/1Q/2Q are 40V, 5A, highefficiency, synchronous DC-DC buck converters qualified to AEC-Q100 grade 1 with an enhanced featureset.

 

Image courtesy of Diodes Incorporated

 

Their special gate drive/bootstrap design enables them to operate in LDO mode, with near 100% duty cycle.

As the load current approaches zero, all AP6450xQ enter Pulse Frequency Modulation (PFM), automatically enhancing efficiency.

To reduce EMI, the AP6450xQ uses frequency spread spectrum (FSS), which prevents the emitted energy to stay at any one frequency for any significant period of time.

The AP64500Q and AP64502Q have programmable switching frequency, up to 2.2MHz, that can also be synchronized to an external clock. The AP64501Q has a nominal 570kHz switching frequency.

Both the AP64501Q and AP64502Q have programmable soft-start that reduces inrush currents, while the AP64500Q and AP64501Q have external compensation to optimize the loop response.

All devices are available in the SO-8EP package.

 

The Diodes Advantage

• Automotive-compliant AP64500Q/AP64501Q/AP64502Q supports ambient temperatures up to +125ºC
• VIN 3.8V to 40V Works across the wide automotive battery range including load dump
• Wide Output Voltage Range: to near 100% of VIN (LDO Mode) Maintains regulation even as VIN approaches VOUT
• Low (25μA) Quiescent Current (IQ) and 1μA Shutdown Current Enables the system to meet <100µA standby requirements of some automotive applications
• Programmable and Synchronizable fSW (AP64500Q/AP64502Q) Low frequency from 100kHz – high-efficiency solution High frequency up to 2.2MHz – small-form factor solution
• External Compensation (AP64500Q/AP64501Q) Enables optimization of loop response
• Programmable Soft-Start Time (AP64501Q/AP64502Q) Reduces inrush current at power-up or enable of device

 

Application(s)

• Automotive Infotainment Power Supplies
• Automotive Forward Lighting POLs