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LTC3419EMS-1#TR PDF预览

LTC3419EMS-1#TR

更新时间： 2024-09-25 19:48:55
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
16页 264K
描述
IC 1.2 A DUAL SWITCHING CONTROLLER, 2250 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MSOP-10, Switching Regulator or Controller

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LTC3419EMS-1#TR 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：MSOP
包装说明：TSSOP, TSSOP10,.19,20针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.13
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 VJESD-30 代码：S-PDSO-G8
JESD-609代码：e0长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：85 °C
最低工作温度：最大输出电流：1.2 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：2250 kHz
技术：CMOS温度等级：COMMERCIAL EXTENDED
端子面层：Tin/Lead (Sn/Pb)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：20宽度：3 mm
Base Number Matches：1

LTC3419EMS-1#TR 数据手册

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LTC3419  
Dual Monolithic 600mA  
Synchronous Step-Down  
Regulator  
FEATURES  
DESCRIPTION  
The LTC®3419 is a dual, 2.25MHz, constant-frequency,  
synchronous step-down DC/DC converter in a tiny  
3mm × 3mm DFN package. 100% duty cycle provides  
low dropout operation, extending battery life in portable  
systems. Lowoutputvoltagesaresupportedwiththe0.6V  
feedback reference voltage. Each regulator can supply  
600mA output current.  
■
High Efficiency Dual Step-Down Outputs: Up to 96%  
■
600mA Current per Channel at V = 3V  
IN  
■
Only 35μA Quiescent Current During Operation  
(Both Channels)  
■
2.25MHz Constant-Frequency Operation  
■
2.5V to 5.5V Input Voltage Range  
■
Low Dropout Operation: 100% Duty Cycle  
■
No Schottky Diodes Required  
The input voltage range is 2.5V to 5.5V, making it ideal  
for Li-Ion and USB powered applications. Supply cur-  
rent during operation is only 35μA and drops to <1μA in  
shutdown. A user-selectable mode input allows the user  
to trade off between high efficiency Burst Mode operation  
and pulse-skipping mode.  
■
Internally Compensated for All Ceramic Capacitors  
■
Independent Internal Soft-Start for Each Channel  
■
Available in Fixed Output Versions  
■
Current Mode Operation for Excellent Line and Load  
Transient Response  
■
0.6V Reference Allows Low Output Voltages  
User-Selectable Burst Mode® Operation  
■
An internally set 2.25MHz switching frequency allows the  
use of tiny surface mount inductors and capacitors. Inter-  
nal soft-start reduces inrush current during start-up. Both  
outputs are internally compensated to work with ceramic  
outputcapacitors.TheLTC3419isavailableinalowprofile  
(0.75mm)3mm×3mmDFNpackage.TheLTC3419isalso  
available in a fixed output voltage configuration selected  
via internal resistor dividers (see Table 2).  
■
Short-Circuit Protected  
■
Ultralow Shutdown Current: I < 1μA  
Q
■
Available in Small MSOP or 3mm × 3mm  
DFN-8 Packages  
APPLICATIONS  
■
Cellular Telephones  
, LT, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation. All other  
trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 5481178, 6127815, 6304066, 6498466, 6580258, 6611131.  
■
Digital Still Cameras  
■
Wireless and DSL Modems  
■
Portable Media Players  
■
PDAs/Palmtop PCs  
TYPICAL APPLICATION  
Efficiency and Power Loss vs  
Output Current  
Dual Monolithic Buck Regulator in 8-Lead 3 × 3 DFN  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10  
V
IN  
= 3.6V  
V
IN  
2.5V TO 5.5V  
1
10μF  
RUN2  
V
IN  
RUN1  
MODE  
0.1  
LTC3419  
SW2  
SW1  
3.3μH  
22pF  
3.3μH  
22pF  
V
V
OUT1  
OUT2  
2.5V AT  
600mA  
1.8V AT  
600mA  
0.01  
0.001  
0.0001  
V
FB2  
V
FB1  
V
OUT  
V
OUT  
V
OUT  
= 1.2V  
= 1.8V  
= 2.5V  
GND  
118k  
187k  
10μF  
10μF  
59k  
59k  
3419 TA01  
0.1  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
3419 TA01b  
3419f  
1
1234567...16

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