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LTC3405AES6

更新时间： 2024-02-22 05:41:38
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
16页 210K
描述
1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT

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中文翻译

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LTC3405AES6 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SOT包装说明：VSSOP, TSOP6,.11,37
针数：6Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.14模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
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：R-PDSO-G6
JESD-609代码：e3长度：2.9 mm
湿度敏感等级：1功能数量：1
端子数量：6最高工作温度：70 °C
最低工作温度：最大输出电流：0.63 A
封装主体材料：PLASTIC/EPOXY封装代码：VSSOP
封装等效代码：TSOP6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：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：1800 kHz
技术：CMOS温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：1.625 mm
Base Number Matches：1

LTC3405AES6 数据手册

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LTC3405A  
1.5MHz, 300mA  
Synchronous Step-Down  
Regulator in ThinSOT  
U
DESCRIPTIO  
FEATURES  
■
High Efficiency: Up to 96%  
The LTC®3405A is a high efficiency monolithic synchro-  
nous buck regulator using a constant frequency, current  
mode architecture. Supply current during operation is  
only 20µA and drops to <1µA in shutdown. The 2.5V to  
5.5V input voltage range makes the LTC3405A ideally  
suitedforsingleLi-Ionbattery-poweredapplications.100%  
duty cycle provides low dropout operation, extending  
battery life in portable systems.  
■
Very Low Quiescent Current: Only 20µA  
During Operation  
■
300mA Output Current at VIN = 3V  
2.5V to 5.5V Input Voltage Range  
1.5MHz Constant Frequency Operation  
No Schottky Diode Required  
Low Dropout Operation: 100% Duty Cycle  
Stable with Ceramic Capacitors  
0.8V Reference Allows Low Output Voltages  
Shutdown Mode Draws <1µA Supply Current  
±2% Output Voltage Accuracy  
■
■
■
■
■
■
■
■
■
Switching frequency is internally set at 1.5MHz, allowing  
the use of small surface mount inductors and capacitors.  
The LTC3405A is specifically designed to work well with  
ceramic output capacitors, achieving very low output  
voltage ripple and a small PCB footprint.  
Current Mode Operation for Excellent Line and  
Load Transient Response  
■
■
Overtemperature Protected  
The internal synchronous switch increases efficiency and  
eliminates the need for an external Schottky diode. Low  
output voltages are easily supported with the 0.8V feed-  
back reference voltage. The LTC3405A is available in a low  
profile (1mm) ThinSOT package.  
Low Profile (1mm) ThinSOTTM Package  
U
APPLICATIO S  
■
Cellular Telephones  
■
■
■
■
■
For fixed 1.5V and 1.8V output versions, refer to the  
LTC3405A-1.5/LTC3405A-1.8 data sheet.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation.  
Protected by U.S. Patents, including 6580258, 5481178.  
Personal Information Appliances  
Wireless and DSL Modems  
Digital Still Cameras  
MP3 Players  
Portable Instruments  
U
TYPICAL APPLICATIO  
100  
V
= 3.6V  
= 4.2V  
IN  
95  
90  
85  
80  
75  
70  
65  
60  
4.7µH**  
V
IN  
4
3
V
*
OUT  
2.7V  
V
SW  
LTC3405A  
IN  
3.3V  
†
22pF  
C
TO 5.5V  
IN  
††  
C
OUT  
2.2µF  
CER  
4.7µF  
V
IN  
1
6
RUN  
CER  
5
MODE  
V
FB  
887k  
V
IN  
= 5.5V  
GND  
280k  
2
3405A F01a  
*V  
CONNECTED TO V FOR 2.7V < V < 3.3V  
IN IN  
OUT  
**MURATA LQH3C4R7M34  
†TAIYO YUDEN LMK212BJ225MG  
††TAIYO YUDEN JMK212BJ475MG  
0.1  
1000  
1
10  
100  
OUTPUT CURRENT (mA)  
3405A F01b  
Figure 1a. High Efficiency Step-Down Converter  
Figure 1b. Efficiency vs Load Current  
3405afa  
1
1234567...16

中文翻译

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