Datasheet > MIC4685WR

MIC4685WR

更新时间： 2024-01-01 09:29:48

品牌	Logo	应用领域
美国微芯 - MICROCHIP		开关
页数	文件大小	规格书
17页	332K
描述
SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PSSO7

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MIC4685WR 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	1.4	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	30 V	最小输入电压：	4 V
标称输入电压：	12 V	JESD-30 代码：	R-PSSO-G7
JESD-609代码：	e3	长度：	9.395 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	7	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	2.03 mm	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	225 kHz
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn) - annealed
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	SINGLE	处于峰值回流温度下的最长时间：	40
宽度：	8 mm	Base Number Matches：	1

MIC4685WR 数据手册

MIC4685

3A SPAK SuperSwitcher™

Buck Regulator

General Description

Features

The MIC4685 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 MIC4685 achieves 3A of continuous current in the

7-pin SPAK package.

• Low 2mm proﬁle SPAK package

• 3A continuous output current

• Wide 4V to 30V input voltage range (34V transient)

• Fixed 200kHz PWM operation

• Over 85% efﬁciency

• Output voltage adjustable to 1.235V

• All surface mount solution

• Internally compensated with fast transient response

• Over-current protection

The thermal performance of the SPAK allows it to replace

TO-220s and TO-263s (D²PAKs) in many applications.

The SPAK saves board space with a 36% smaller footprint

than TO-263.

High-efﬁciency is maintained over a wide output current

range by utilizing a boost capacitor to increase the voltage

available to saturate the internal power switch. As a result

of this high-efﬁciency, only the ground plane of the PCB is

needed for a heat sink.

• Frequency foldback short-circuit protection

• Thermal shutdown

The MIC4685 allows for a high degree of safety. It has a

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

allowing it to be used in applications where input voltage

transients may be present. Built-in safety features include

over-current protection, frequency-foldback short-circuit

protection, and thermal shutdown.

Applications

• Point-of-load power supplies

• Simple high-efﬁciency step-down regulators

• 5V to 3.3V/2A conversion

• 12V to 5V/3.3V/2.5V/1.8V 3A conversion

• Dual-output ±5V conversion

• Base stations

The MIC4685 is available in a 7-pin SPAK package with a

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

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

• LCD power supplies

• Battery chargers

___________________________________________________________________________________________________________

Typical Application

V_IN

8V to 30V

MIC4685_R

C_BS

0.33µF/50V

V_OUT

1.8V/3A

3.01k

39mH

C_IN

33µF

35V

C_OUT

330µF

6.3V

6.49k

GND

4, Tab

40V

1.8V Output Converter

SuperSwitcher is a trademark of Micrel, Inc

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-012610

January 2010

12 3 4 5 6 7...17

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MIC4685WR-TR	MICREL	SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PSSO7	获取价格
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