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LTC3822EGN-1 PDF预览

LTC3822EGN-1

更新时间： 2024-02-23 21:45:57
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
24页 371K
描述
No RSENSE, Low Input Voltage, Synchronous Step-Down DC/DC Controller

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LTC3822EGN-1 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP16,.3
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.18模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：4.5 V最小输入电压：2.75 V
标称输入电压：3.3 VJESD-30 代码：R-PDSO-G16
JESD-609代码：e3长度：4.8895 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP16,.3
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：850 kHz技术：CMOS
温度等级：COMMERCIAL EXTENDED端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3.899 mmBase Number Matches：1

LTC3822EGN-1 数据手册

 浏览型号LTC3822EGN-1的Datasheet PDF文件第2页浏览型号LTC3822EGN-1的Datasheet PDF文件第3页浏览型号LTC3822EGN-1的Datasheet PDF文件第4页浏览型号LTC3822EGN-1的Datasheet PDF文件第5页浏览型号LTC3822EGN-1的Datasheet PDF文件第6页浏览型号LTC3822EGN-1的Datasheet PDF文件第7页 
LTC3822-1  
TM  
No R  
, Low Input  
SENSE  
Voltage, Synchronous  
Step-Down DC/DC Controller  
DESCRIPTION  
FEATURES  
The LTC®3822-1 is a synchronous step-down switching  
regulator controller that drives external N-channel power  
MOSFETs using few external components. The constant  
■
Dual N-Channel MOSFET Synchronous Drive  
■
No Current Sense Resistor Required  
■
Optimized for 3.3V and Li-Ion Applications  
IN  
■
Constant Frequency Current Mode Operation for  
frequency current mode architecture with MOSFET V  
DS  
Excellent Line and Load Transient Response  
sensing eliminates the need for sense resistors and im-  
■
1% 0.6V Reference  
provesefficiency.  
■
Low Dropout Operation: 99% Duty Cycle  
Burst Mode operation provides high efficiency at light  
loads.The99%maximumdutycycleprovideslowdropout  
operation, extending operating time in battery-powered  
systems.  
■
Phase-Lockable or Adjustable Frequency:  
250kHz to 750kHz  
Internal Soft-Start Circuitry  
■
■
Tracking and Adjustable Soft-Start Input  
■
Theoperatingfrequencycanbeprogrammedupto750kHz,  
allowing the use of small surface mount inductors and ca-  
pacitors. For noise sensitive applications, the LTC3822-1  
can be synchronized to an external clock from 250kHz to  
750kHz.  
Selectable Maximum Peak Current Sense Threshold  
Selectable Burst Mode®/ Forced Continuous/Pulse  
■
Skipping Mode at Light Load  
■
Digital RUN Control Pin  
■
Output Overvoltage Protection  
■
Micropower Shutdown: I = 7.5µA  
Q
The LTC3822-1 is available in the tiny footprint thermally  
enhanced 12-pin DFN package or 16-pin narrow SSOP  
package.  
■
Tiny Thermally Enhanced 12-Pin (3mm × 3mm) DFN  
or 16-Pin Narrow SSOP Packages  
LTC3822-1  
LTC3822  
APPLICATIONS  
Light Load  
Operation  
Package  
Continuous, Discontinuous Discontinuous Mode  
or Burst Mode Operation  
DD12 (3mm × 3mm), GN16 DD10 (3mm × 3mm),  
■
Single Cell Li-Ion Powered Systems  
■
3.3V Systems  
IN  
MS10E  
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology  
Tracking/Soft-Start Yes  
Internal Soft-Start Only  
No  
No  
Corporation. No R  
is a trademark of Linear Technology Corporation.  
SENSE  
External Sync  
PGOOD Pin  
Yes  
GN16 Only  
All other trademarks are the property of their respective owners.  
Protected by Patents, including 5481178, 5929620, 6580258, 6304066, 5847554,  
6611131, 6498466, 5705919.  
Efficiency/Power Loss vs Load Current  
TYPICAL APPLICATION  
100  
10  
90  
80  
70  
V
Burst Mode  
EFFICIENCY  
IN  
IPRG  
RUN  
V
IN  
3.3V  
47µF  
×2  
1
PLLLPF  
TG  
60  
50  
LTC3822-1  
TH  
0.47µH  
V
1.8V  
8A  
OUT  
I
SW  
0.1  
0.01  
0.001  
BOOST  
47µF  
×2  
Burst Mode  
10.2k  
1nF  
40  
30  
20  
10  
0
POWER LOSS  
SYNC/MODE  
TRACK/SS  
0.1µF  
GND  
BG  
V
V
= 3.3V  
IN  
OUT  
= 1.8V  
V
GND  
FB  
FIGURE 10 CIRCUIT  
38221 TA01  
10  
100  
1000 10000  
59k  
118k  
38221 TA01b  
LOAD CURRENT (mA)  
38221f  
1
1234567...24

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