ST L6738单相降压电源转换解决方案

ST公司的L6738是集成了大电流驱动器的单相降压电源控制器,VIN输入电压可低至1.5V,电源电压从5V到12V,轻负载效率优化,集成了0.8V基准电压,输出电压精度±0.5%,主要用在存储器和终端电源,子系统电源(MCH, IOCH, PCI),CPU和DSP电源,分布式电源和通用DC/DC转换器.本文介绍了L6738主要特性,框图,典型应用电路以及评估板STEVAL-ISA075V1主要特性,电路图和材料清单.

The L6738 is a single-phase step-down controller with integrated high-current drivers that provides complete control logic and protection to realize a DC-DC converter.

The device flexibility allows the management of conversions with power input VIN as low as 1.5 V and the device supply voltage ranging from 5 V to 12 V bus.

The L6738 features a proprietary algorithm that allows light-load efficiency optimization, boosting efficiency without compromising the output voltage ripple.

The integrated 0.8 V reference allows the generation of output voltages with ±0.5% accuracy over line and temperature variations.

The oscillator is programmable up to 600 kHz. The L6738 provides a programmable dual-level overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.

The L6738 is available in a VFQFPN 16 3x3 mm package.

L6738主要特性:

■ Flexible power supply from 5 V to 12 V bus..

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