MIC4684

更新时间： 2024-11-18 22:51:23

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器
页数	文件大小	规格书
16页	215K
描述
2A High-Efficiency SuperSwitcher Buck Regulator

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MIC4684 数据手册

MIC4684

Micrel

MIC4684

2A High-Efficiency SuperSwitcher™ Buck Regulator

Final Information

General Description

Features

The MIC4684 is a high-efficiency 200kHz stepdown (buck)

switching regulator. Power conversion efficiency of above

85% is easily obtainable for a wide variety of applications.

The MIC4684 achieves 2A of continuous current in an 8-lead

SO (small outline) package at 60°C ambient temperature.

• SO-8 package with 2A continuous output current

• Over 85% efficiency

• Fixed 200kHz PWM operation

• Wide 4V to 30V input voltage range

• Output voltage adjustable to 1.235V

• All surface mount solution

• Internally compensated with fast transient response

• Over-current protection

• Frequency foldback short-circuit protection

• Thermal shutdown

Highefficiencyismaintainedoverawideoutputcurrentrange

byutilizingaboostcapacitortoincreasethevoltageavailable

to saturate the internal power switch. As a result of this high

efficiency, no external heat sink is required. The MIC4684,

housed in an SO-8, can replace larger TO-220 and TO-263

packages in many applications.

Applications

The MIC4684 allows for a high degree of safety. It has a wide

input voltage range of 4V to 30V (34V transient), allowing it to

beusedinapplicationswhereinputvoltagetransientsmaybe

present. Built-in safety features include over-current protec-

tion, frequency-foldback short-circuit protection, and thermal

shutdown.

• Simple high-efficiency step-down regulator

• 5V to 3.3V/1.7A converter (60°C ambient)

• 12V to 1.8V/2A converter (60°C ambient)

• On-card switching regulator

• Dual-output ±5V converter

• Battery charger

The MIC4684 is available in an 8-lead SO package with a

junction temperature range of –40°C to +125°C.

Ordering Information

Part Number

Voltage

Junction Temperature Range

Package

MIC4684BM

Adj

–40°C to +125°C

SOP-8

Typical Application

V_IN

6.5V to 25V

MIC4684BM

C_BS

0.33µF/50V

VIN

V_OUT

2.5V/1.5A

Efficiency

68µH

C_IN

33µF

35V

vs. Output Current

3.01k

330µF

6.3V

100

3.01k

V_OUT= 3.3V

GND

2, 6, 7

40V

V_OUT= 1.8V

V_OUT= 2.5V

Adjustable Buck Converter

1A, 20V Feed forward diode

MIC4684BM

V_IN= 5.0V

0.5

V_IN

±10%

1.5

C_BS

OUTPUT CURRENT (A)

VIN

V_OUT

3.3V/1.7A

0.33µF/50V

47µH

C_IN

68µF

10V

Efficiency vs. Output Current

220µF

10V

GND

2, 6, 7

20V

5V to 3.3V Converter

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

July 2001

MIC4684

12 3 4 5 6 7...16

中文翻译

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与MIC4684相关器件

型号	品牌	获取价格	描述	数据表
MIC4684_10	MICREL	获取价格	2A High-Efficiency SuperSwitcher Buck Regulator
MIC4684BM	MICREL	获取价格	2A High-Efficiency SuperSwitcher Buck Regulator
MIC4684BMTR	MICREL	获取价格	Switching Regulator, Voltage-mode, 225kHz Switching Freq-Max, PDSO8, SOP-8
MIC4684YM	MICREL	获取价格	2A High-Efficiency SuperSwitcher Buck Regulator
MIC4684YMTR	MICREL	获取价格	SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, SOP-8
MIC4684YM-TR	MICREL	获取价格	SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PDSO8
MIC4685	MICREL	获取价格	3A SPAK SuperSwitcher⑩ Buck Regulator
MIC4685	MICROCHIP	获取价格	The MIC4685 is a high-efficiency 200kHz stepdown (buck) switching regulator. Power conve
MIC4685_10	MICREL	获取价格	3A SPAK SuperSwitcher Buck Regulator
MIC4685-3.3BR	MICREL	获取价格	Switching Regulator, Voltage-mode, 1A, 225kHz Switching Freq-Max, PSSO7, SPAK-7

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