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LTC3407 PDF预览

LTC3407

更新时间: 2024-01-28 09:30:38
品牌 Logo 应用领域
凌特 - Linear 转换器电池
页数 文件大小 规格书
24页 516K
描述
Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger

LTC3407 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

LTC3407 数据手册

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LTC3455  
Dual DC/DC Converter  
with USB Power Manager  
and Li-Ion Battery Charger  
U
DESCRIPTIO  
FEATURES  
The LTC®3455 is a complete power management solution  
for a variety of portable applications. The device contains  
two synchronous step-down DC/DC converters, a USB  
power controller, a full-featured Li-Ion battery charger, a  
Hot Swap output, a low-battery indicator, and numerous  
internal protection features. The LTC3455 provides a  
small, simple solution for obtaining power from three  
differentpowersources:asingle-cellLi-Ionbattery, aUSB  
port, and a wall adapter. Current drawn from the USB bus  
isaccuratelylimitedunderallconditions. WheneveraUSB  
or a wall adapter is present, the battery charger is enabled  
and all internal power for the device is drawn from the  
appropriate external power source. All outputs are dis-  
charged to ground during shutdown to provide complete  
output disconnect. The device is available in a  
4mm × 4mm 24-pin exposed-pad QFN package.  
Seamless Transition between Input Power Sources:  
Li-Ion Battery, USB, and 5V Wall Adapter  
Accurate USB Current Limiting (500mA/100mA)  
Two High Efficiency DC/DC Converters: Up to 96%  
Thermal Regulation Maximizes Battery Charge  
Rate without Risk of Overheating*  
Full-Featured Li-Ion Battery Charger  
Hot Swap™ Output for SDIO and Memory Cards  
Pin-Selectable Burst Mode® Operation  
Output Disconnect: All Outputs Discharged to  
Ground During Shutdown  
Available in a 4mm × 4mm × 0.8mm 24-Pin  
QFN Package  
U
APPLICATIO S  
Handheld Computers  
Digital Cameras  
MP3 Players  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Hot Swap is a trademark of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
*U.S. Patent 6,522,118  
U
TYPICAL APPLICATIO  
8
21  
15  
19  
22  
20  
23  
USB 5V  
1  
USB  
MODE  
HSON  
ON2  
6
SUSPEND  
USB  
Efficiency  
5
4.7µF  
CONTROLLER  
µC  
USBHP  
PWRON  
RST  
100  
10  
SWITCHER 2  
OUT2  
WALL 5V  
V
MAX  
V
= 3.3V  
95  
90  
85  
80  
75  
70  
65  
60  
PBSTAT  
10µF  
1Ω  
1µF  
1M  
1M  
ON/OFF  
LTC3455  
3.32k  
1k  
1.8V  
4
SWITCHER 1  
V = 1.8V  
OUT1  
CHRG  
24  
14  
11  
ON  
WALLFB  
0.1µF  
3.3V, HS  
HSO  
3
2
1.24k  
1µF  
TIMER  
PROG  
13  
12  
HSI  
2.49k  
4.7µH  
9
3.3V  
0.5A  
SW2  
V
BAT  
10pF  
249k  
4.7µF  
1M  
18  
7
SINGLE  
CELL Li-ION  
3.3V TO 4.2V  
1.8V  
10µF  
FB2  
+
V
= 3.6V  
BAT  
80.6k  
17  
16  
LBO  
AO  
AI  
1
10  
100  
1000  
4.7µH  
10pF  
V
BAT  
1.8V  
0.4A  
SW1  
LOAD CURRENT (mA)  
2.49M  
100k  
3455 TA01b  
1
10µF  
FB1  
25  
806k  
80.6k  
GND  
3455 TA01a  
3455f  
1

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