Datasheet > MIC4685WRTR

MIC4685WRTR

更新时间： 2024-01-11 09:00:38

品牌	Logo	应用领域
麦瑞 - MICREL		开关
页数	文件大小	规格书
17页	331K
描述
SWITCHING REGULATOR, 225kHz SWITCHING FREQ-MAX, PSSO7, ROHS COMPLIANT, SPAK-7

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MIC4685WRTR 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Transferred	零件包装代码：	MODULE
包装说明：	,	针数：	7
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.15
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)	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

MIC4685WRTR 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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