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LTC3403EDD#TRPBF

更新时间： 2024-01-17 13:34:30
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 926K
描述
LTC3403 - 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3403EDD#TRPBF 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：VSON,
针数：8Reach Compliance Code：compliant
风险等级：5.73模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE最大输入电压：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-N8JESD-609代码：e3
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：70 °C最低工作温度：
最大输出电流：1.3 A封装主体材料：PLASTIC/EPOXY
封装代码：VSON封装形状：SQUARE
封装形式：SMALL OUTLINE, VERY THIN PROFILE峰值回流温度（摄氏度）：250
认证状态：Not Qualified座面最大高度：0.85 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：NO LEAD
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

LTC3403EDD#TRPBF 数据手册

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LTC3403  
1.5MHz, 600mA  
Synchronous Step-Down  
Regulator with Bypass Transistor  
U
FEATURES  
DESCRIPTIO  
The LTC®3403 is a high efficiency monolithic synchro-  
nous buck regulator optimized for WCDMA power ampli-  
fier applications. The output voltage can be dynamically  
programmed from 0.3V to 3.5V. At VOUT > 3.6V an internal  
bypass P-channel MOSFET connects VOUT directly to VIN,  
eliminating power loss through the inductor. Selectable  
forcedcontinuousmodeenablesfastVOUT responsetothe  
controlling input.  
Supply current is only 20µA in Burst Mode® operation and  
drops to <1µA in shutdown. The 2.5V to 5V input voltage  
range makes the LTC3403 ideally suited for single Li-Ion  
battery-powered applications. 100% duty cycle provides  
low dropout operation, extending battery life in portable  
systems.  
■
Dynamically Adjustable Output from 0.3V to 3.5V  
■
Very Low Quiescent Current: Only 20  
µA  
During Operation  
600mA Output Current  
Internal P-Channel MOSFET Bypass Transistor  
High Efficiency: Up to 96%  
1.5MHz Constant Frequency Operation  
No Schottky Diode Required  
Low Dropout Operation: 100% Duty Cycle  
2.5V to 5V Input Voltage Range  
Drives Optional External P-Channel MOSFET  
Shutdown Mode Draws <1µA Supply Current  
Current Mode Operation for Excellent Line and  
Load Transient Response  
■
■
■
■
■
■
■
■
■
■
■
■
Overtemperature Protected  
Available in 8-Lead 3mm × 3mm DFN Package  
Switching frequency is internally set at 1.5MHz, allowing  
the use of small surface mount inductors and capacitors.  
The internal synchronous switch increases efficiency and  
eliminates the need for an external Schottky diode.  
U
APPLICATIO S  
■
WCDMA Cell Phone Power Amplifiers  
Wireless Modems  
The LTC3403 is available in a low profile 8-lead 3mm ×  
■
3mm DFN package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
95  
90  
V
= 3.6V  
IN  
85  
80  
75  
70  
65  
60  
55  
50  
2.2µH*  
V
= 4.2V  
V
V
IN  
IN  
2.7V  
OUT  
3× V  
V
SW  
LTC3403  
MODE GDR  
REF  
600mA  
IN  
†
V
= 3.6V  
V
= 4.2V  
IN  
C
**  
IN  
C
TO 5V  
OUT  
IN  
4.7µF  
10µF  
CER  
CER  
V
OUT  
RUN  
REF  
FORCED  
CONTINUOUS  
MODE  
Burst Mode  
OPERATION  
OUT  
GND  
OUTPUT  
WCDMA  
RF PA  
PROGRAMMING  
DAC  
3
V
= 1.8V  
*MURATA LQH32CN2R2M11  
3403 F01a  
0.1  
1
10  
100  
1000  
**TAIYO YUDEN JMK212BJ475MG  
†
TAIYO YUDEN JMK212BJ106MN  
OUTPUT CURRENT (mA)  
3403 F01b  
Figure 1a. WCDMA Transmitter Power Supply  
Figure 1b. Efficiency vs Output Current  
3403f  
1
1234567...16

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