Datasheet > ML4875CS-3

ML4875CS-3

更新时间： 2024-11-05 22:17:59

品牌	Logo	应用领域
MICRO-LINEAR		稳压器开关光电二极管信息通信管理
页数	文件大小	规格书
10页	199K
描述
Low Voltage Boost Regulator with Shutdown

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ML4875CS-3 数据手册

July 2000

ML4875*

Low Voltage Boost Regulator with Shutdown

GENERAL DESCRIPTION

FEATURES

The ML4875 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 ML4875 ideal for 1 cell

applications. The ML4875 is capable of start-up with input

voltages as low as 1V and is available in 5V, 3.3V, and 3V

output versions with an output voltage accuracy of ±3%.

■ Guaranteed start-up and operation at 1V input

■ Pulse Frequency Modulation and Internal Synchronous

Rectification for high efficiency

■ Isolates the load from the input during shutdown

■ Minimum external components

■ Low ON resistance internal switching FETs

■ Micropower operation

Unlike regulators using external Schottky diodes, the

ML4875 isolates the load from the battery when the

SHDN pin is high. This is accomplished by an integrated

synchronous rectifier which 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 ML4875 requires only one inductor and two

capacitors to build a very small regulator circuit capable

of achieving conversion efficiencies in excess of 90%.

■ 5V, 3.3V, and 3V output versions

The circuit contains a RESET output which goes low when

the DETECT input drops below 200mV.

*Some Packages Are End Of Life Or Obsolete

BLOCK DIAGRAM

OUT

PWR

GND

OUT

FEEDBACK

BOOST

CONTROL

BAT

OUT

REGULATION

SHUTDOWN

CONTROL

GND

–

REF

SHDN

DETECT

RESET

FROM POWER

MANAGEMENT

*Optional

12 3 4 5 6 7...10

中文翻译

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与ML4875CS-3相关器件

型号	品牌	获取价格	描述	数据表
ML4875CS-5	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator with Shutdown
ML4875CS-T	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator with Shutdown
ML4875ES-3	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator with Shutdown
ML4875ES-5	MICRO-LINEAR	获取价格	Low Voltage Boost Regulator with Shutdown
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