Datasheet > ML4865ES-2

ML4865ES-2

更新时间： 2024-09-14 22:18:07

品牌	Logo	应用领域
MICRO-LINEAR		稳压器开关光电二极管
页数	文件大小	规格书
10页	236K
描述
High Voltage High Current Boost Regulator

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

ML4865ES-2 数据手册

July 2000

ML4865

High Voltage High Current Boost Regulator

GENERAL DESCRIPTION

FEATURES

The ML4865 is a high voltage, continuous conduction

boost regulator designed for DC to DC conversion in

multiple cell battery powered systems. Continuous

conduction allows the regulator to maximize output

current for a given inductor. The maximum switching

frequency can exceed 200kHz, allowing the use of small,

low cost inductors. The ML4865 is capable of start-up with

input voltages as low as 1.8V and generates a 12V output

with output voltage accuracy of ±4%.

■ Guaranteed full load start-up and operation at 1.8V

input

■ Continuous conduction mode for high output current

■ Very low quiescent current

■ Pulse frequency modulation and internal synchronous

rectification for high efficiency

Unlike most boost regulators, the ML4865 isolates the

load from the battery when the SHDN pin is high. An

integrated synchronous rectifier eliminates the need for an

external Schottky diode and provides a lower forward

voltage drop, resulting in higher conversion efficiency. In

addition, low quiescent battery current and variable

frequency operation result in high efficiency even at light

loads. The ML4865 requires only one inductor and two

capacitors to build a very small regulator circuit capable

of achieving conversion efficiencies approaching 90%.

■ Maximum switching frequency > 200kHz

■ Minimum external components

■ Low ON resistance internal switching FETs

■ Fixed 12V output can be adjusted to lower output

voltages

BLOCK DIAGRAM

SHDN

SHUTDOWN

CONTROL

SYNCHRONOUS

START-UP

RECTIFIER

CONTROL

OUT

–

SENSE

FEEDBACK

CONTROL

–

BOOST

CONTROL

SHDN

2.42V

PWR GND

GND

12 3 4 5 6 7...10

中文翻译

下载PDF

与ML4865ES-2相关器件

型号	品牌	获取价格	描述	数据表
ML4866	MICRO-LINEAR	获取价格	3.3V Output DC-DC Step-Down Converter
ML4866CS	MICRO-LINEAR	获取价格	3.3V Output DC-DC Step-Down Converter
ML4866ES	MICRO-LINEAR	获取价格	3.3V Output DC-DC Step-Down Converter
ML4866IS	MICRO-LINEAR	获取价格	3.3V Output DC-DC Step-Down Converter
ML4869	MICRO-LINEAR	获取价格	Medium Current Boost Regulator with Load Disconnect
ML4869CS-3	MICRO-LINEAR	获取价格	Medium Current Boost Regulator with Load Disconnect
ML4869CS-5	MICRO-LINEAR	获取价格	Medium Current Boost Regulator with Load Disconnect
ML4869ES-3	MICRO-LINEAR	获取价格	Medium Current Boost Regulator with Load Disconnect
ML4869ES-5	MICRO-LINEAR	获取价格	Medium Current Boost Regulator with Load Disconnect
ML486PJB	COILCRAFT	获取价格	High-Reliability Power Inductors