L6738A中文资料Single Phase PWM Controller with Light-Load Efficiency Optimization数据手册ST规格书

描述 Description

The L6738A 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 to manage conversions with power input VINas low as 1.5V and the device supply voltage ranging from 5 V to 12 V bus.
The L6738A 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 generation of output voltages with ±0.5% accuracy over line and temperature variations.
The oscillator is programmable up to 600 kHz.
The L6738A provides a programmable overcurrent protection and overvoltage protection. The current information is monitored across the inductor DCR.
The L6738A is available in a VFQFPN 16 3x3 mm package.

特性 Features

• Flexible power supply from 5 V to 12 V bus
• Power conversion input as low as 1.5 V
• Light-load efficiency optimization
• Embedded bootstrap diode
• VIN detector
• 0.8 V internal reference
• 0.5% output voltage accuracy
• Remote GND recovery
• High-current integrated drivers
• Sensorless and programmable precise-OC sense across Inductor DCR
• OV protection
• Programmable oscillator up to 600 kHz
• LS-less to manage pre-bias startup
• Adjustable output voltage
• Disable function
• Internal soft-start
• VFQFPN 16 3x3 mm package

简介

L6738A属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由ST制造生产的L6738ADC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。