L6725中文资料Voltage mode PWM controller with bootstrap anti-discharging system数据手册ST规格书

描述 Description

The device is a flexible high performance PWM buck controller dedicated for low voltage distributed DC-DC. The input voltage can range from 1.8V to 18V, while the supply voltage can range from 4.5V to 18V. The output voltage is adjustable down to 0.6V.
High peak current gate drivers provide for fast switching to the external power section, and the output current can be in excess of 20A. The device is capable to manage minimum on-times (TON) shorter than 100ns making possible conversions with very low duty cycle and very high switching frequency. In order to guarantee a real overcurrent protection, also with very narrow TON, the current sense is realized both on the high-side and low-side MOSFETs. When necessary, two different current limit protections can be externally set through an external resistor. The device can sink current after the soft-start phase while, during the soft-start, the sink mode capability is disabled in order to allow a proper start-up also in pre-biased output voltage conditions. Other features are over-voltage-protection and thermal shutdown.

特性 Features

Predictive anti-cross conduction control
High current embedded drivers
Sink current capability
Programmable high-side and low-side R
DS(on) sense over-current-protection
Pre-bias start up capability
Selectable switching frequency 250KHz/500KHz
Thermal shut-down
Over voltage protection
Package: SO16N
Soft-start and inhibit
External input voltage reference
Input voltage range from 1.8V to 18V
Adjustable output voltage down to 0.6V with ±0.8% accuracy over line voltage and temperature (0˚C~125˚C)
Supply voltage range from 4.5V to 18V
0% to 100% duty cycle
Bootstrap anti-discharging system
Fixed frequency voltage mode control

简介

L6725属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的L6725DC-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。