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MIC38C44BN: 产品描述Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP8; 产品类别电源/电源管理电源电路; 文件大小188KB，共11页; 制造商Micrel ( Microchip ); 官网地址https://www.microchip.com

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MIC38C44BN概述

Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP8

MIC38C44BN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	DIP, DIP8,.3
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	10 V
标称输入电压	15 V
JESD-30 代码	R-PDIP-T8
JESD-609代码	e0
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	0.5 A
封装主体材料	PLASTIC/EPOXY
封装代码	DIP
封装等效代码	DIP8,.3
封装形状	RECTANGULAR
封装形式	IN-LINE
峰值回流温度（摄氏度）	240
认证状态	Not Qualified
表面贴装	NO
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	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	30
宽度	7.62 mm

文档解析

MIC38C43 是一款 BiCMOS 电流模式 PWM 控制器，固定频率操作，与 UC3843 引脚兼容，但通过 BiCMOS 技术实现更低功耗和更高效率。该版本启动电压为 8.4V，最低操作电压为 7.6V，最大占空比为 96%，适合低电压启动和高占空比应用。典型启动电流为 50μA，操作电流为 4mA，输出上升和下降时间分别为 40ns 和 30ns，提供轨到轨输出，驱动能力强，支持高速开关操作。技术特性包括修整的 5V 带隙基准和振荡器放电电流，确保稳定振荡频率；欠压锁定电路带有滞后，防止误操作；工作温度范围 -40°C 至 +85°C，兼容 UC284x 规格。器件还具有低交叉传导电流和高电流感测精度，增益为 3.0，便于实现精确的电流限制和反馈控制。广泛应用于低电压输入的电源系统，如电池供电设备、DC-DC 转换器、降压和升压稳压器、隔离电源以及同步整流器。提供 8-pin DIP 和 SOIC 封装，以及 14-pin 选项以改善模拟和电源分离，提升整体性能，适用于便携式电子和汽车电子领域。

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MIC38C42/3/4/5

Micrel, Inc.

MIC38C42/3/4/5

BiCMOS Current-Mode PWM Controllers

General Description

The MIC38C4x are ﬁxed frequency, high performance, cur-

rent-mode PWM controllers. Micrel’s BiCMOS devices are

pin compatible with 384x bipolar devices but feature several

improvements.

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 384x 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. De-

creased output rise and fall times drive larger MOSFETs, and

rail-to-rail output capability increases efﬁciency, especially at

lower supply voltages. The MIC38C4x also features a trimmed

oscillator discharge current and bandgap reference.

The MIC38C4x denotes 8-pin plastic DIP and SOIC packages.

MIC384Cx-1 denotes 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 perfomance

and power dissipation.

For fast rise and fall times and higher output drive, refer to

the MIC38HC4x.

Features

• Fast 40ns output rise and 30ns output fall times

• –40°C to +85°C temperature range

meets UC284x speciﬁcations

• High-performance, low-power BiCMOS Process

• Ultralow start-up current (50µA typical)

• Low operating current (4mA typical)

• CMOS outputs with rail-to-rail swing

• ≥ 500kHz current-mode operation

• 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

Oscillator

‡

VREF

8 (14)

UVLO

†

(VD)

(11)

RT/CT

4 (7)

OUT

6 (10)

2 (3)

2.5V

(PGND)

(8)

COMP

1 (1)

†

( )

pins

GND* (AGND) ISNS

(9)

3 (5)

‡

are on MIC38C4x-1 (14-lead) versions only

MIC38C4x, (8-lead) versions only

MIC38C42, MIC38C43 (96% max. duty cycle) versions only

MIC38C44, MIC38C45 (50% max. duty cycle) versions only

MM8 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

July 2005

M9999-072805

MIC38C44BN相似产品对比

	MIC38C44BN	MIC38C43-1BN	MIC38C45BN	MIC38C45-1BN	MIC38C45BM	MIC38C42-1BN	MIC38C44-1BN
描述	Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP8	Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP14	Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP8	Switching Controller, Current-mode, 0.5A, 500kHz Switching Freq-Max, BICMOS, PDIP14, PLASTIC, DIP-14	Switching Controller, Current-mode, 0.5A, 500kHz Switching Freq-Max, BICMOS, PDSO8, SOIC-8	Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP14	Switching Controller Current-mode 0.5A 500kHz Switching Freq-Max BICMOS PDIP14
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
厂商名称	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )	Micrel ( Microchip )
包装说明	DIP, DIP8,.3	DIP, DIP14,.3	DIP, DIP8,.3	DIP, DIP14,.3	SOP, SOP8,.25	DIP, DIP14,.3	DIP, DIP14,.3
Reach Compliance Code	not_compliant	_compli	not_compliant	not_compliant	not_compliant	_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
控制模式	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
最大输入电压	30 V	30 V	30 V	30 V	30 V	30 V	30 V
最小输入电压	10 V	8.2 V	8.2 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
JESD-30 代码	R-PDIP-T8	R-PDIP-T14	R-PDIP-T8	R-PDIP-T14	R-PDSO-G8	R-PDIP-T14	R-PDIP-T14
JESD-609代码	e0	e0	e0	e0	e0	e0	e0
功能数量	1	1	1	1	1	1	1
端子数量	8	14	8	14	8	14	14
最高工作温度	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
最大输出电流	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A	0.5 A
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	DIP	DIP	DIP	DIP	SOP	DIP	DIP
封装等效代码	DIP8,.3	DIP14,.3	DIP8,.3	DIP14,.3	SOP8,.25	DIP14,.3	DIP14,.3
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	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
认证状态	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
表面贴装	NO	NO	NO	NO	YES	NO	NO
切换器配置	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
技术	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS	BICMOS
温度等级	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)
端子形式	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	GULL WING	THROUGH-HOLE	THROUGH-HOLE
端子节距	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
处于峰值回流温度下的最长时间	30	30	30	30	30	30	30
宽度	7.62 mm	7.62 mm	7.62 mm	7.62 mm	3.94 mm	7.62 mm	7.62 mm
Factory Lead Time	1 week	1 week	1 week	-	-	1 week	1 week
座面最大高度	-	5.588 mm	-	5.588 mm	1.879 mm	5.588 mm	5.588 mm

MIC38C44BN

MIC38C44BN概述

MIC38C44BN规格参数

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MIC38C44BN相似产品对比

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