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IMP38C42EMA PDF预览

IMP38C42EMA

更新时间： 2024-11-09 05:39:15
品牌 Logo 应用领域
A1PROS 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管信息通信管理
页数 文件大小 规格书
10页 161K
描述
BiiCMOS Currentt--Mode BiiCMOS Currentt--Mode

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中文翻译

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IMP38C42EMA 技术参数

生命周期：Contact ManufacturerReach Compliance Code：unknown
风险等级：5.77Is Samacsys：N
控制模式：CURRENT-MODEJESD-30 代码：R-PDSO-G8
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：TSSOP
封装等效代码：TSSOP8,.19封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：YES
技术：BICMOS温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUALBase Number Matches：1

IMP38C42EMA 数据手册

 浏览型号IMP38C42EMA的Datasheet PDF文件第2页浏览型号IMP38C42EMA的Datasheet PDF文件第3页浏览型号IMP38C42EMA的Datasheet PDF文件第4页浏览型号IMP38C42EMA的Datasheet PDF文件第5页浏览型号IMP38C42EMA的Datasheet PDF文件第6页浏览型号IMP38C42EMA的Datasheet PDF文件第7页 
IMP38C/HC/42/3/4/5  
P
OWER  
M
ANAGEMENT  
Key Features  
BiCMOS Current-Mode  
PWM Controllers  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
384x Series Pinout with BiCMOS Technology  
Zero Cross-Conduction Current by Design  
1MHz Operation  
65ns Maximum Current-Sense Delay  
120µA Maximum Start-Up Current  
1.5mA Maximum Operating Current  
High Output Current Drive  
– 1.0A, IMP38HC4x  
– 0.5A, IMP38C4x  
20V Maximum Supply Voltage  
2.5V, 1%, Trimmed Error Amplifier Reference  
Trimmed Oscillator Discharge Current  
Pin-for-Pin Enhanced Replacements for Micrel  
MIC38C/HC4x and GMT38C4x/HC4x  
– 1MHz Operation  
– No Cross-Conduction Current  
– 50ns Current-Sense Delay  
The IMP38C4x and IMP38HC4x are fixed frequency, high performance,  
current-mode PWM controllers that are pin compatible with bipolar 384x  
devices but feature improvements resulting from IMP’s BiCMOS  
processing and circuit design. Notable among the improvements are zero  
cross-conduction/shoot-through current, reduced start-up and operating  
current, lower current-sense delay, higher frequency operation, full  
supply voltage swing at the output and a 1% trimmed voltage reference.  
ꢀ
ꢀ
ꢀ
ꢀ
IMP38C4x and IMP38HC4x output driver stage has zero cross-conduction  
current. A proprietary output state-machine monitors each output  
MOSFET and guarantees by design zero cross-conduction current. This is  
an industry first for 384x PWM devices.  
Under-voltage lockout (UVL) performance has been improved. When  
the power supply voltage is below the startup voltage, internal circuitry  
puts the output into a low impedance state. The output will sink 20mA  
and remain below 1.3V, well below the turn-on threshold voltage of the  
external MOSFET. Even when VDD drops to zero volts, the out pin will  
not rise above approximately 1.3V because the output UVLO circuit is  
Block Diagrams  
7 (12)  
VDD  
(11)  
VD  
+
5V  
8 (14)  
VREF  
UVLO  
Reference  
–
+
–
4 (7)  
1 (1)  
2 (3)  
6 (10)  
OUT  
RTCT  
COMP  
FB  
Oscillator  
T
Q
Q
–
+
2R  
S
R
–
EA  
1V  
COMP  
+
–
+
R
2.5V  
Ref  
(8)  
PGND  
Connection Notes  
3 (5)  
(
) Pins Are 14-Pin Devices Only  
IMP38C4X, IMP38HC4X (8-Pin Devices)  
50% Maximum Duty Cycle:  
IMP38C44, IMP38HC44, IMP38C45, IMP38HC45  
GND 5 ISNS  
AGND (9)  
96% Maximum Duty Cycle:  
IMP38C42, IMP38HC42, IMP38C43, IMP38HC43  
38C/HC_01.eps  
© 2000 IMP, Inc.  
408-432-9100/www.impweb.com  
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