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MIC38HC45BM: 产品描述Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDSO8; 产品类别电源/电源管理电源电路; 文件大小72KB，共8页; 制造商Micrel ( Microchip ); 官网地址https://www.microchip.com

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MIC38HC45BM概述

Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDSO8

MIC38HC45BM规格参数

参数名称	属性值
是否Rohs认证	不符合
厂商名称	Micrel ( Microchip )
包装说明	SOP, SOP8,.25
Reach Compliance Code	not_compliant
Factory Lead Time	1 week
模拟集成电路 - 其他类型	SWITCHING CONTROLLER
控制模式	CURRENT-MODE
控制技术	PULSE WIDTH MODULATION
最大输入电压	30 V
最小输入电压	8.2 V
标称输入电压	15 V
JESD-30 代码	R-PDSO-G8
JESD-609代码	e0
长度	4.9 mm
湿度敏感等级	1
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	SOP
封装等效代码	SOP8,.25
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE
峰值回流温度（摄氏度）	240
认证状态	Not Qualified
座面最大高度	1.879 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	Tin/Lead (Sn85Pb15)
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	30
宽度	3.9 mm

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MIC38HC42/3/4/5

Micrel

MIC38HC42/3/4/5

BiCMOS 1A Current-Mode PWM Controllers

General Description

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.

Undervoltage lockout circuitry allows the ’42 and ’44 versions

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.

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, especially at lower supply voltages. The MIC38HC4x

also features a trimmed oscillator discharge current and

bandgap reference.

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.

Features

• 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

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

• Trimmed oscillator discharge current

• UVLO with hysteresis

• 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

Flyback, isolated regulators

Forward converters

Synchronous FET converters

Functional Diagram

VDD

7 (12)

35V

Reference

UVLO

†

VREF

8 (14)

(VD)

(11)

RT/CT

4 (7)

Oscillator

‡

OUT

6 (10)

2 (3)

2.5V

(PGND)

(8)

COMP

1 (1)

GND*(AGND)

(9)

ISNS

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. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

August 2000

MIC38HC42/3/4/5

MIC38HC45BM相似产品对比

	MIC38HC45BM	MIC38HC45-1BN	MIC38HC45BN	MIC38HC42-1BN	MIC38HC43-1BN	MIC38HC43BM	MIC38HC42BN	MIC38HC44BN
描述	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDSO8	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDIP14	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDIP8	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDIP14	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDIP14	Switching Controller Current-mode 1A 500kHz Switching Freq-Max BICMOS PDSO8	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8, PLASTIC, DIP-8	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8, PLASTIC, DIP-8
是否Rohs认证	不符合	不符合	不符合	不符合	不符合	不符合	不符合	不符合
厂商名称	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )
包装说明	SOP, SOP8,.25	DIP, DIP14,.3	DIP, DIP8,.3	DIP, DIP14,.3	DIP, DIP14,.3	SOP, SOP8,.25	DIP, DIP8,.3	DIP, DIP8,.3
Reach Compliance Code	not_compliant	not_compliant	not_compliant	_compli	_compli	_compli	_compli	_compli
模拟集成电路 - 其他类型	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER
控制模式	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
控制技术	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
最大输入电压	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V
最小输入电压	8.2 V	8.2 V	8.2 V	10 V	8.2 V	8.2 V	10 V	10 V
标称输入电压	15 V	15 V	15 V	15 V	15 V	15 V	15 V	15 V
JESD-30 代码	R-PDSO-G8	R-PDIP-T14	R-PDIP-T8	R-PDIP-T14	R-PDIP-T14	R-PDSO-G8	R-PDIP-T8	R-PDIP-T8
JESD-609代码	e0	e0	e0	e0	e0	e0	e0	e0
功能数量	1	1	1	1	1	1	1	1
端子数量	8	14	8	14	14	8	8	8
最高工作温度	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
最大输出电流	1 A	1 A	1 A	1 A	1 A	1 A	1 A	1 A
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SOP	DIP	DIP	DIP	DIP	SOP	DIP	DIP
封装等效代码	SOP8,.25	DIP14,.3	DIP8,.3	DIP14,.3	DIP14,.3	SOP8,.25	DIP8,.3	DIP8,.3
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	SMALL OUTLINE	IN-LINE	IN-LINE
峰值回流温度（摄氏度）	240	240	240	240	240	240	240	240
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
表面贴装	YES	NO	NO	NO	NO	YES	NO	NO
切换器配置	BOOST	BOOST	BOOST	BOOST	BOOST	BOOST	BOOST	BOOST
最大切换频率	500 kHz	500 kHz	500 kHz	500 kHz	500 kHz	500 kHz	500 kHz	500 kHz
技术	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS
温度等级	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
端子面层	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)	Tin/Lead (Sn85Pb15)
端子形式	GULL WING	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	GULL WING	THROUGH-HOLE	THROUGH-HOLE
端子节距	1.27 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	1.27 mm	2.54 mm	2.54 mm
端子位置	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
处于峰值回流温度下的最长时间	30	30	30	30	30	30	30	30
宽度	3.9 mm	7.62 mm	7.62 mm	7.62 mm	7.62 mm	3.9 mm	7.62 mm	7.62 mm
Factory Lead Time	1 week	1 week	-	1 week	1 week	1 week	-	-
长度	4.9 mm	-	9.525 mm	-	-	4.9 mm	9.525 mm	9.525 mm
座面最大高度	1.879 mm	5.588 mm	-	5.588 mm	5.588 mm	1.879 mm	-	-

MIC38HC45BM

MIC38HC45BM概述

MIC38HC45BM规格参数

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MIC38HC45BM相似产品对比

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