MP4570

MP4570

3A, 4.5V-55V Input, Frequency Programmable, Fully Integrated Synchronous, Step-Down Converter

Datasheet

概要

The MP4570 is a frequency programmable step-down 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, PoE, automotive and printer with DC high voltage bus.
The MP4570 uses peak current mode control to regulate the output voltage. The chip provides over current protection with valley current detection which is used to avoid current running way. Also it has accurate and reliable over voltage protection, and auto recovery thermal protection. In addition, the optional external soft start is available. Enable and power good indication function can be used to power track easily. In order to increase the efficiency, MP4570 will automatically scaling down the switching frequency when load is light. Meanwhile, the low side MOSFET will be turned off to reduce driver loss when zero inductor current is detected. MP4570 also features as a fully integrated solution with both high side and low side power MOSFETs. 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.

機能と利点

Wide Input Voltage Range: 4.5V to 55V
90mΩ and 70mΩ Internal High and Low Power MOSFETs
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
Current Limit Decreasing during Output Short for Better Thermal Performance
Power Good Indication
Thermal Shutdown Protection
Available in a TSSOP-20 EP Package.

アクティブ部品番号

MP4570GF-P MP4570GF-Z

P＆Zの意味

Evaluation Tools

EV4570-F-01A Evaluation Kit 3A, 55V, Frequency-Programmable Step-Down Converter Evaluation Board

The EV4570-F-01A is an evaluation board for the MP4570/MPQ4570, a frequency-programmable, step-down switching converter with integrated internal high-side and low side power MOSFETs. It can provide 3A of continuous output current with peak current control mode for excellent transient response and efficiency performance.

The wide 4.5V to 55V input voltage range accommodates a variety of step-down applications, including industrial, PoE, and automotive applications, as well as printers with a DC high-voltage bus.

Valley current detection is used to avoid current runaway during over-current protection. It also has accurate and reliable over-voltage protection, and auto-recovery thermal protection. In addition, the optional external soft start is available. The enable and power good indication functions can be used to track power easily. In order to increase efficiency, the MP4570/MPQ4570 automatically scales down the switching frequency at light loads. Meanwhile, the low-side MOSFET turns off to reduce driver loss when zero inductor current is detected. Synchronous operation mode with the integrated low-side MOSFET helps reduce the conduction loss, external components, and saves space and cost.

The MP4570/MPQ4570 is available in a TSSOP-20EP package with an exposed pad.

￥6,810.50
+ tax