Datasheet > 电源电路 > 开关式稳压器或控制器> MIC2172BMT&R

MIC2172BMT&R

更新时间： 2024-02-28 20:16:07

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器开关
页数	文件大小	规格书
20页	908K
描述
Switching Regulator, Current-mode, 3.5A, 115kHz Switching Freq-Max, PDSO8, SOIC-8

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技术参数
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MIC2172BMT&R 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

MIC2172BMT&R 数据手册

MIC2172/3172

100kHz 1.25A Switching Regulators

General Description

Features

The MIC2172 and MIC3172 are complete 100kHz SMPS

current-mode controllers with internal 65V 1.25A power

switches. The MIC2172 features external frequency

synchronization or frequency adjustment, while the

MIC3172 features an enable/shutdown control input.

• 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)

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.

The MIC3172 is for applications that require on/off control

of the regulator. The MIC3172 is externally shutdown by

applying a TTL low signal to EN (enable). When disabled,

the MIC3172 draws only leakage current (typically less

than 1µA). EN must be high for normal operation. For

applications not requiring control, EN must be tied to VIN or

TTL high.

Applications

• Laptop/palmtop computers

• Toys

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 possible to avoid the audible beat frequencies

that result from the unequal oscillator frequencies of

independent SMPS regulators.

• Hand-held instruments

• Off-line converter up to 50W (requires external power

switch)

• Predriver for higher power capability

• Master/slave configurations (MIC2172)

A reference signal can be supplied by one MIC2172

designated as a master. To insure locking of the slave’s

oscillators, the reference oscillator frequency must be

higher than the slave’s. The master MIC2172’s oscillator

frequency is increased up to 135kHz by connecting a

resistor from SYNC to ground (see applications

information).

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

SOIC for –40°C to +85°C operation.

___________________________________________________________________________________________________________

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

M9999-041806

(408) 955-1690

April 2006

12 3 4 5 6 7...20

中文翻译

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与MIC2172BMT&R相关器件

型号	品牌	获取价格	描述	数据表
MIC2172BN	MICREL	获取价格	100kHz 1.25A Switching Regulators Preliminary Information
MIC2172YM	MICREL	获取价格	100kHz 1.25A Switching Regulators
MIC2172YM	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, 115kHz SWITCHING FREQ-MAX, PDSO8
MIC2172YMTR	MICREL	获取价格	暂无描述
MIC2172YM-TR	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, 115kHz SWITCHING FREQ-MAX, PDSO8
MIC2172YN	MICREL	获取价格	100kHz 1.25A Switching Regulators
MIC2172YN	MICROCHIP	获取价格	3.5A SWITCHING REGULATOR, 115kHz SWITCHING FREQ-MAX, PDIP8
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

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