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LT3742EUF#PBF PDF预览

LT3742EUF#PBF

更新时间: 2024-11-09 13:09:39
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
24页 275K
描述
LT3742 - Dual, 2-Phase Step-Down Switching Controller; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

LT3742EUF#PBF 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:QFN包装说明:HVQCCN, LCC24,.16SQ,20
针数:24Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.64其他特性:OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 30V
模拟集成电路 - 其他类型:DUAL 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:4 V标称输入电压:5 V
JESD-30 代码:S-PQCC-N24JESD-609代码:e3
长度:4 mm湿度敏感等级:1
功能数量:1端子数量:24
最高工作温度:125 °C最低工作温度:
最大输出电流:0.5 A封装主体材料:PLASTIC/EPOXY
封装代码:HVQCCN封装等效代码:LCC24,.16SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:0.8 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PHASE-SHIFT
最大切换频率:560 kHz技术:BIPOLAR
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:30
宽度:4 mmBase Number Matches:1

LT3742EUF#PBF 数据手册

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LT3742  
Dual, 2-Phase Step-Down  
Switching Controller  
FEATURES  
DESCRIPTION  
TheLT®3742isadualstep-downDC/DCswitchingregulator  
controllerthatdriveshighsideN-channelpowerMOSFETs.  
A 500kHz fixed frequency current mode architecture pro-  
vides fast transient response with simple loop compensa-  
tion components and cycle-by-cycle current limiting. The  
output stages of the two controllers operate 180° out of  
phase to reduce the input ripple current, minimizing the  
noise induced on the input supply, and allowing less input  
capacitance.  
Wide Input Voltage Range: 4V to 30V  
Wide Output Voltage Range: 0.8V to V  
IN  
Low Shutdown I : 20μA  
Q
Out-of-Phase Controllers Reduce Required Input  
Capacitance and Power Supply Induced Noise  
0.8V 1.5% Voltage Reference  
500kHz Current Mode Fixed Frequency Operation  
Internal Boost Converter Provides Bias Rail for  
N-Channel MOSFET Gate Drive  
Power Good Voltage Monitor for Each Output  
Programmable Soft-Start  
24-Lead 4mm × 4mm × 0.75mm Package  
AninternalboostregulatorgeneratesabiasrailofV +7V  
IN  
to provide gate drive for the N-channel MOSFETs allowing  
low dropout and 100% duty cycle operation. The LT3742  
can be used for applications where both controllers need  
to operate independently, or where both controllers are  
used to provide a single higher current output.  
APPLICATIONS  
Satellite and Cable TV Set-Top Boxes  
Distributed Power Regulation  
The device is available in a thermally enhanced 4mm ×  
4mm QFN package.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Automotive Systems  
Super Capacitor Charger  
TYPICAL APPLICATION  
8V and 5V Dual Step-Down Converter  
10μH  
V
IN  
14V  
4.7μF  
45.3k  
20.0k  
Efficiency vs Load Current  
V
SWB BIAS  
IN  
UVLO  
1μF  
100  
8V  
OUT  
90  
80  
70  
60  
50  
40  
LT3742  
5V  
OUT  
V
V
IN  
IN  
10μF  
10μF  
G1  
G2  
6.5μH  
6.5μH  
0.010Ω  
0.010Ω  
V
V
5V  
4A  
OUT1  
8V  
OUT2  
SW1  
SW2  
+
+
4A  
SENSE1  
SENSE1  
FB1  
SENSE2  
SENSE2  
1.8k  
1.05k  
FB2  
47μF  
47μF  
200Ω  
200Ω  
PG1  
PG1  
PG2  
PG2  
2.5  
LOAD CURRENT (A)  
3
0
0.5  
1
1.5  
2
3.5  
4
RUN/SS1  
RUN/SS2  
V
V
C1  
C2  
30k  
20k  
RUN1  
3742 TA03b  
RUN2  
GND  
1nF  
1000pF  
1nF 1000pF  
3742 TA03a  
3742f  
1

LT3742EUF#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3742EUF#TRPBF Linear

类似代替

LT3742 - Dual, 2-Phase Step-Down Switching Controller; Package: QFN; Pins: 24; Temperature

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