MP4570GF-P

MP4570 is a frequency programmable stepdown switching converter with integrated internal high-side and low side power MOSFETs. It can provide 3A continuous output current with peak current control for excellent transient response and efficiency performance. The wide 4.5V to 55V input voltage range accommodates a variety of step down applications, including those applications in industrial power systems, automotive and distrubutive power system, PoE input non-isolated buck, scanners and printer with DC high voltage bus. The MP4570 uses peak current mode control to regulate the output voltage. Meanwhile, the low side MOSFET will be turned off to reduce driver loss when zero inductor current is detected. Synchronous operation mode with integrated low side MOSFET is much helpful to reduce the conduction loss and also beneficial to reduce external components space and save the cost. The MP4570 is available in a TSSOP-20 EP with exposed pad package.

• Wide input voltage range from 4.5V to 55V, peak current mode control
• Programmable switching frequency, stable independent on output capacitors
• Optional external soft start, OCP protection with valley current detection
• Support external SYNC clock, OVP protection, power good indication
• Current limit decreasing during output short for better thermal performance
• Thermal shutdown protection, FB current is 10nA typical at (VFB=1.07V)
• Quiescent supply current is 450µA typical at (VIN = 48V, VEN = 3.3V, TJ= +25°C)
• Shutdown supply current is 7µA typical at (VIN = 48V, VEN = 3.3V, TJ= +25°C)
• Switching frequency is 520KHz typical at (VIN = 48V, VEN = 3.3V, TJ= +25°C)
• Operating junction temperature range from -40°C to +125°C, TSSOP-20 EP package