Datasheet > 电源电路 > 开关式稳压器或控制器> MIC2172YN

MIC2172YN

更新时间： 2024-02-23 22:21:15

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关光电二极管 PC
页数	文件大小	规格书
17页	158K
描述
100kHz 1.25A Switching Regulators

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

MIC2172YN 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	LEAD FREE, PLASTIC, DIP-8	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
Factory Lead Time：	10 weeks	风险等级：	1.47
Samacsys Confidence：	4	Samacsys Status：	Released
Samacsys PartID：	1838470	Samacsys Pin Count：	8
Samacsys Part Category：	Integrated Circuit	Samacsys Package Category：	Dual-In-Line Packages
Samacsys Footprint Name：	MIC4424YN	Samacsys Released Date：	2020-01-16 13:22:39
Is Samacsys：	N	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	40 V	最小输入电压：	3 V
标称输入电压：	5 V	JESD-30 代码：	R-PDIP-T8
JESD-609代码：	e3	长度：	9.525 mm
功能数量：	1	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	3.5 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT APPLICABLE
认证状态：	Not Qualified	表面贴装：	NO
切换器配置：	BOOST	最大切换频率：	115 kHz
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn) - annealed
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT APPLICABLE
宽度：	7.62 mm	Base Number Matches：	1

MIC2172YN 数据手册

MIC2172/3172

Micrel, Inc.

MIC2172/3172

100kHz 1.25A Switching Regulators

slave’s. The master MIC2172’s oscillator frequency is in-

creased up to 135kHz by connecting a resistor from SYNC to

ground (see applications information).

General Description

The MIC2172 and MIC3172 are complete 100kHz SMPS

current-mode controllers with internal 65V 1.25A power

switches. The MIC2172 features external frequency syn-

chronization or frequency adjustment, while the MIC3172

features an enable/shutdown control input.

The MIC2172/3172 is available in an 8-pin plastic DIP or

SOIC for –40°C to +85°C operation.

Features

Although primarily intended for voltage step-up applications,

the floating switch architecture of the MIC2172/3172 makes

it practical for step-down, inverting, and Cuk configurations

as well as isolated topologies.

Operating from 3V to 40V, the MIC2172/3172 draws only

7mA of quiescent current making it attractive for battery

operated supplies.

• 1.25A, 65V internal switch rating

• 3V to 40V input voltage range

• Current-mode operation

• Internal cycle-by-cycle current limit

• Thermal shutdown

• Low external parts count

• Operates in most switching topologies

• 7mA quiescent current (operating)

• <1µA quiescent current, shutdown mode (MIC3172)

• TTL shutdown compatibility (MIC3172)

• External frequency synchronization (MIC2172)

• External frequency trim (MIC2172)

• Fits most LT1172 sockets (see applications info)

The MIC3172 is for applications that require on/off control of

the regulator. The MIC3172 is externally shutdown by

applyingaTTLlowsignaltoEN(enable). Whendisabled, the

MIC3172 draws only leakage current (typically less than

1µA). ENmustbehighfornormaloperation. Forapplications

not requiring control, EN must be tied to V or TTL high.

Applications

The MIC2172 is for applications requiring two or more SMPS

regulators that operate from the same input supply. The

MIC2172 features a SYNC input which allows locking of its

internal oscillator to an external reference. This makes it

possibletoavoidtheaudiblebeatfrequenciesthatresultfrom

the unequal oscillator frequencies of independent SMPS

regulators.

A reference signal can be supplied by one MIC2172 desig-

natedasamaster. Toinsurelockingoftheslave’soscillators,

the reference oscillator frequency must be higher than the

• Laptop/palmtop computers

• Toys

• Hand-held instruments

• Off-line converter up to 50W

(requires external power switch)

• Predriver for higher power capability

• Master/slave configurations (MIC2172)

Typical Applications

V_OUT

V_IN

4V to 6V

+5V

5V, 0.25A

(4.75V min.)

R4*

C3*

D1*

C1*

1N5818

22µF

27µH

3.74k

V_OUT

470µF

V_IN

+12V, 0.14A

Enable

V_SW

N/C

SYNC

MIC2172

V_SW

Shutdown

1:1.25

_PRI= 100µH

1N5822

10.7k

MIC3172

COMP

GND

P1 P2

1.24k

P1 P2

1.24k

470µF

1µF

* Locate near MIC2172 when supply leads > 2"

* Optional voltage clipper (may be req’d if T1 leakage inductance too high)

Figure 1.

Figure 2.

MIC2172 5V to 12V Boost Converter

MIC3172 5V Flyback Converter

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

M9999-042205

April 2005

12 3 4 5 6 7...17

中文翻译

下载PDF

与MIC2172YN相关器件

型号	品牌	获取价格	描述	数据表
MIC2174	MICREL	获取价格	Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz
MIC2174_10	MICREL	获取价格	Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz
MIC2174-1YMM	MICREL	获取价格	Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz
MIC2174-1YMMTR	MICREL	获取价格	SWITCHING CONTROLLER, 375kHz SWITCHING FREQ-MAX, PDSO10, LEAD FREE, MSOP-10
MIC2174-1YMM-TR	MICREL	获取价格	Switching Controller, Current-mode, 375kHz Switching Freq-Max, PDSO10, LEAD FREE, MSOP-10
MIC2174C	MICREL	获取价格	Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz
MIC2174C-1YMM	MICREL	获取价格	Synchronous Buck Controller Featuring Adaptive On-Time Control 40V Input, 300kHz
MIC2174C-1YMMTR	MICREL	获取价格	SWITCHING CONTROLLER, 338kHz SWITCHING FREQ-MAX, PDSO10, LEAD FREE, MSOP-10
MIC2174C-1YMM-TR	MICREL	获取价格	Switching Controller, Current-mode, 338kHz Switching Freq-Max, PDSO10, LEAD FREE, MSOP-10
MIC2176	MICREL	获取价格	Wide Input Voltage, Synchronous Buck

与MIC2172YN相关文章

共享储能电站：数据驱动与政策引领下的黄金机遇
2024-06-26

13
US1M数据手册解读：产品特性、替换型号推荐
2024-06-26

13
解析BAV99LT1G手册：参数分析、替换型号推荐
2024-06-26

13
解读BSS138PW数据手册：产品特性、电气参数及替换型号推荐
2024-06-26

15

产品中心

服务支持

精选活动

关于我们

帮助中心

MIC2172YN

MIC2172YN 技术参数

MIC2172YN 数据手册

与MIC2172YN相关器件

与MIC2172YN相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

MIC2172YN

MIC2172YN 技术参数

MIC2172YN 数据手册

与MIC2172YN相关器件

与MIC2172YN相关文章

您还可以找

您在本页遇到什么问题？