Datasheet > ML4861

ML4861

更新时间： 2024-09-13 22:54:47

品牌	Logo	应用领域
MICRO-LINEAR		稳压器
页数	文件大小	规格书
11页	221K
描述
Low Voltage Boost Regulator

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ML4861 数据手册

October1996

F E A T U R IN G

Extended Commercial Temperature Range

ML4861*

for Portable Handheld Equipment

Low Voltage Boost Regulator

GENERAL DESCRIPTION

FEATURES

The ML4861 is a boost regulator designed for DC to DC

conversion in 1 to 3 cell battery powered systems. The

combination of BiCMOS process technology, internal

synchronous rectification, variable frequency operation,

and low supply current make the ML4861 ideal for 1 cell

applications. The ML4861 is capable of start-up with input

voltages as low as 1V and is available in 6V, 5V, and 3.3V

output versions with output voltage accuracy of ±3%.

■ Guaranteed full load start-up and operation at 1V input

■ Pulse Frequency Modulation and Internal Synchronous

Rectification for high efficiency

■ Minimum external components

■ Low ON resistance internal switching FETs

■ Micropower operation

■ 6V, 5V, and 3.3V output versions

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 ML4861 requires only one

inductor and two capacitors to build a very small

regulator circuit capable of achieving conversion

efficiencies in excess of 90%.

The circuit also contains a RESET output which goes low

when the IC can no longer function due to low input

voltage, or when the DETECT input drops below 200mV.

* Some Packages Are Obsolete

BLOCK DIAGRAM

OUT

UVLO

DETECT

–

BOOST

CONTROL

FEEDBACK

REF

–

OUT

PWR

GND

–

RESET

*OPTIONAL

TO MICROPROCESSOR

12 3 4 5 6 7...11

中文翻译

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与ML4861相关器件

型号	品牌	获取价格	描述	数据表
ML4861CS-3	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861CS-5	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861CS-6	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861ES-3	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861ES-5	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861ES-6	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861IS-3	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861IS-5	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4861IS-6	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator
ML4862	MICRO-LINEAR	获取价格	Battery Power ControllC