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LTC3407EMSE

更新时间： 2024-01-10 02:05:12
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
16页 204K
描述
Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator

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中文翻译

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LTC3407EMSE 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：TSSOP,
针数：10Reach Compliance Code：compliant
风险等级：5.12模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：CURRENT-MODE最大输入电压：5.5 V
最小输入电压：2.5 V标称输入电压：3.6 V
JESD-30 代码：S-PDSO-G10JESD-609代码：e3
长度：3 mm湿度敏感等级：1
功能数量：2端子数量：10
最高工作温度：70 °C最低工作温度：
最大输出电流：1.25 A封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：250
认证状态：Not Qualified座面最大高度：1.1 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：1800 kHz温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

LTC3407EMSE 数据手册

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LTC3407  
Dual Synchronous, 600mA,  
1.5MHz Step-Down  
DC/DC Regulator  
U
DESCRIPTIO  
FEATURES  
TheLTC®3407isadual, constantfrequency, synchronous  
step down DC/DC converter. Intended for low power  
applications, it operates from 2.5V to 5.5V input voltage  
range and has a constant 1.5MHz switching frequency,  
allowing the use of tiny, low cost capacitors and inductors  
2mm or less in height. Each output voltage is adjustable  
from 0.6V to 5V. Internal synchronous 0.35Ω, 1A power  
switches provide high efficiency without the need for  
external Schottky diodes.  
■
High Efficiency: Up to 96%  
■
Very Low Quiescent Current: Only 40µA  
■
1.5MHz Constant Frequency Operation  
■
High Switch Current: 1A on Each Channel  
■
No Schottky Diodes Required  
■
Low RDS(ON) Internal Switches: 0.35Ω  
■
Current Mode Operation for Excellent Line  
and Load Transient Response  
Short-Circuit Protected  
■
■
Low Dropout Operation: 100% Duty Cycle  
A user selectable mode input is provided to allow the user  
to trade-off ripple noise for low power efficiency. Burst  
Mode® operation provides high efficiency at light loads,  
while Pulse Skip Mode provides low ripple noise at light  
loads.  
■
Ultralow Shutdown Current: IQ < 1µA  
■
Output Voltages from 5V down to 0.6V  
■
Power-On Reset Output  
■
Externally Synchronizable Oscillator  
■
Small Thermally Enhanced MSOP and 3mm × 3mm  
To further maximize battery life, the P-channel MOSFETs  
are turned on continuously in dropout (100% duty cycle),  
and both channels draw a total quiescent current of only  
40µA. In shutdown, the device draws <1µA.  
DFN Packages  
U
APPLICATIO S  
■
PDAs/Palmtop PCs  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
■
Digital Cameras  
■
Cellular Phones  
■
Portable Media Players  
■
PC Cards  
■
Wireless and DSL Modems  
U
TYPICAL APPLICATIO  
LTC3407 Efficiency Curve  
V
= 2.5V  
IN  
TO 5.5V  
100  
R5  
C1  
100k  
10µF  
RUN2  
V
RUN1  
POR  
IN  
95  
90  
85  
80  
75  
70  
65  
60  
2.5V  
MODE/SYNC  
RESET  
1.8V  
LTC3407  
L2  
L1  
2.2µH  
2.2µH  
V
= 2.5V  
OUT2  
AT 600mA  
V
= 1.8V  
OUT1  
SW2  
SW1  
AT 600mA  
C5, 22pF  
C4, 22pF  
V
V
FB1  
FB2  
R4  
887k  
R2  
887k  
GND  
V
= 3.3V  
C3  
10µF  
C2  
10µF  
R3  
280k  
R1  
442k  
IN  
Burst Mode OPERATION  
NO LOAD ON OTHER CHANNEL  
1
10  
100  
1000  
3407 TA01  
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML  
L1, L2: MURATA LQH32CN2R2M33  
LOAD CURRENT (mA)  
3407 TA02  
Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators  
sn3407 3407fs  
1
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中文翻译

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