Datasheet > MIC38HC42YM

MIC38HC42YM

更新时间： 2024-02-11 17:08:45

品牌	Logo	应用领域
美国微芯 - MICROCHIP		信息通信管理开关光电二极管
页数	文件大小	规格书
8页	88K
描述
1A SWITCHING REGULATOR, 500kHz SWITCHING FREQ-MAX, PDSO8

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MIC38HC42YM 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	LSOP,	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	2.14	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：	18 V	最小输入电压：	12 V
标称输入电压：	15 V	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e4	长度：	4.9 mm
湿度敏感等级：	3	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：	1 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	LSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1.63 mm	表面贴装：	YES
切换器配置：	BOOST	最大切换频率：	500 kHz
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3.9 mm
Base Number Matches：	1

MIC38HC42YM 数据手册

MIC38HC42/3/4/5

Micrel, Inc.

MIC38HC42/3/4/5

BiCMOS 1A Current-Mode PWM Controllers

General Description

Features

The MIC38HC4x family are fixed frequency current-mode

PWM controllers with 1A drive current capability. Micrel’s

BiCMOS devices are pin-compatible with 384x bipolar de-

vices. Their high output drive, with fast rise and fall times,

combined with low startup current make it an ideal PWM

controller where high efficiency is required.

• Fast 20ns output rise and 15ns output fall times

• –40°C to +85°C temperature range

exceeds UC284x specifications

• High-performance, low-power BiCMOS Process

• Ultralow start-up current (50µA typical)

• Low operating current (4mA typical)

• High output drive (1A peak current, HC version)

• CMOS outputs with rail-to-rail swing

• Current-mode operation up to 500kHz

• Trimmed 5V bandgap reference

Undervoltagelockoutcircuitryallowsthe’42and’44versions

to start up at 14.5V and operate down to 9V, and the ’43 and

’45 versions start at 8.4V with operation down to 7.6V. All

versions operate up to 20V.

• Pin-for-pin compatible with UC3842/3843/3844/3845(A)

• Trimmed oscillator discharge current

• UVLO with hysteresis

When compared to bipolar UC384x devices operating from a

15V supply, start-up current has been reduced to 50µA

typical and operating current has been reduced to 4.0 mA

typical. Decreased output rise and fall times drive larger

MOSFETs, and rail-to-rail output capability increases effi-

ciency, especiallyatlowersupplyvoltages. TheMIC38HC4x

also features a trimmed oscillator discharge current and

bandgap reference.

• Low cross-conduction currents

Applications

• Current-mode, off-line, switched-mode power supplies

• Current-mode, dc-to-dc converters.

• Step-down “buck” regulators

• Step-up “boost” regulators

MIC38HC4x-1 is available in 14-pin plastic DIP and SOIC

packages. 8-pin devices feature small size, while 14-pin

devices separate the analog and power connections for

improved performance and power dissipation.

• Flyback, isolated regulators

• Forward converters

• Synchronous FET converters

Functional Diagram

VDD

7 (12)

35V

UVLO

VREF

8 (14)

(VD)

(11)

Reference

†

Oscillator

RT/CT

4 (7)

OUT

6 (10)

‡

2 (3)

(PGND)

(8)

2.5V

COMP GND*(AGND) ISNS

(9)

1 (1)

3 (5)

( ) pins are on MIC38HC4x-1 (14-lead) versions only

* MIC38HC4x (8-lead) versions only

†

MIC38HC42, MIC38HC43 (96% max. duty cycle) versions only

‡

MIC38HC44, MIC38HC45 (50% max. duty cycle) versions only

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 8

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与MIC38HC42YM相关器件

型号	品牌	描述	获取价格	数据表
MIC38HC42YM-TR	MICROCHIP	1A SWITCHING REGULATOR, 500kHz SWITCHING FREQ-MAX, PDSO8	获取价格
MIC38HC42YN	MICREL	BiCMOS 1A Current-Mode PWM Controllers	获取价格
MIC38HC42YN	MICROCHIP	1A 500kHz SWITCHING FREQ-MAX, PDIP8	获取价格
MIC38HC43	MICREL	BiCMOS 1A Current-Mode PWM Controllers	获取价格
MIC38HC43	MICROCHIP	The MIC38HC4x family are fixed frequency current-mode PWM controllers with 1A drive curren	获取价格
MIC38HC43-1BM	MICREL	BiCMOS 1A Current-Mode PWM Controllers	获取价格

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