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LTC3703EG

更新时间： 2024-11-04 22:55:55
品牌 Logo 应用领域
凌特 - Linear 开关控制器
页数 文件大小 规格书
32页 492K
描述
100V Synchronous Switching Regulator Controller

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中文翻译

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LTC3703EG 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP28,.3
针数：28Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.09模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：15 V最小输入电压：9.3 V
标称输入电压：10 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：10.2 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：85 °C
最低工作温度：最大输出电流：5 A
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP28,.3封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：2 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：330 kHz
技术：CMOS温度等级：OTHER
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：5.3 mm
Base Number Matches：1

LTC3703EG 数据手册

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LTC3703  
100V Synchronous  
Switching Regulator  
Controller  
U
FEATURES  
DESCRIPTIO  
The LTC®3703 is a synchronous step-down switching  
regulator controller that can directly step-down voltages  
from up to 100V, making it ideal for telecom and automo-  
tive applications. The LTC3703 drives external N-channel  
MOSFETs using a constant frequency (up to 600kHz),  
voltage mode architecture. The external component count  
has been minimized, providing a compact overall solution  
footprint.  
■
High Voltage Operation: Up to 100V  
■
Large 1  
Ω Gate Drivers  
■
■
■
■
■
No Current Sense Resistor Required  
Step-Up or Step-Down DC/DC Converter  
Dual N-Channel MOSFET Synchronous Drive  
Excellent Transient Response and DC Line Regulation  
Programmable Constant Frequency: 100kHz to  
600kHz  
■
■
■
■
■
■
■
■
±1% Reference Accuracy  
A precise internal reference provides 1% DC accuracy. A  
high bandwidth error amplifier and patented line feed  
forward compensation provide very fast line and load  
transient response. Strong 1Ω gate drivers allow the  
LTC3703 to drive multiple MOSFETs for higher current  
applications. The operating frequency is user program-  
mable from 100kHz to 600kHz and can also be synchro-  
nized to an external clock for noise-sensitive applications.  
Current limit is programmable with an external resistor  
and utilizes the voltage drop across the synchronous  
MOSFET to eliminate the need for a current sense resistor.  
Soft- start is provided by an external capacitor. Pulling the  
soft-start pin low shuts down the LTC3703, reducing  
supply current to 50µA.  
Synchronizable up to 600kHz  
Selectable Pulse Skip Mode Operation  
Low Shutdown Current: 50µA Typ  
Programmable Current Limit  
Undervoltage Lockout  
Programmable Soft-Start  
16-Pin Narrow SUSOP and 28-Pin SSOP Packages  
APPLICATIO S  
■
48V Telecom and Base Station Power Supplies  
Networking Equipment, Servers  
Automotive and Industrial Control  
■
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
V
CC  
9.3V TO 15V  
+
V
22µF  
25V  
IN  
Efficiency vs Load Current  
15V TO 100V  
BAS21  
MODE/SYNC  
V
IN  
100  
+
22µF  
30k  
×2  
FSET  
LTC3703  
COMP  
FB  
BOOST  
TG  
V
IN  
= 25V  
Si7456DP  
22k  
95  
90  
85  
80  
V
= 50V  
IN  
0.1µF  
3300pF  
15pF  
15k  
8µH  
V
IN  
= 75V  
SW  
V
12V  
5A  
OUT  
8.06k  
1%  
I
V
MAX  
CC  
10Ω  
+
220µF  
25V  
×2  
INV  
DRV  
CC  
Si7456DP  
MBR1100  
0.1µF  
RUN/SS  
GND  
BG  
10µF  
330Ω  
113k  
1%  
BGRTN  
0
1
2
3
4
5
1µF  
1500pF  
LOAD (A)  
3703 F01b  
3703 F01  
Figure 1. High Efficiency High Voltage Step-Down Converter  
3703f  
1
1234567...32

中文翻译

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