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LT3990EMS PDF预览

LT3990EMS

更新时间: 2024-01-31 19:33:46
品牌 Logo 应用领域
凌特 - Linear 稳压器二极管
页数 文件大小 规格书
20页 229K
描述
60V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes

LT3990EMS 技术参数

是否Rohs认证:符合生命周期:Transferred
零件包装代码:MSOP包装说明:HTSSOP, TSSOP16,.19,20
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.13Is Samacsys:N
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:62 V
最小输入电压:4.2 V标称输入电压:12 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:4.039 mm湿度敏感等级:1
功能数量:1端子数量:16
最高工作温度:125 °C最低工作温度:-40 °C
最大输出电流:0.865 A标称输出电压:3.3 V
封装主体材料:PLASTIC/EPOXY封装代码:HTSSOP
封装等效代码:TSSOP16,.19,20封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, 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:1.1 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:2760 kHz
技术:BIPOLAR温度等级:AUTOMOTIVE
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:30宽度:3 mm
Base Number Matches:1

LT3990EMS 数据手册

 浏览型号LT3990EMS的Datasheet PDF文件第2页浏览型号LT3990EMS的Datasheet PDF文件第3页浏览型号LT3990EMS的Datasheet PDF文件第4页浏览型号LT3990EMS的Datasheet PDF文件第5页浏览型号LT3990EMS的Datasheet PDF文件第6页浏览型号LT3990EMS的Datasheet PDF文件第7页 
Electrical Specifications Subject to Change  
LT3990  
60V, 350mA Step-Down  
Regulator with 2.5µA  
Quiescent Current and  
Integrated Diodes  
FEATURES  
DESCRIPTION  
Low Ripple Burst Mode® Operation  
The LT®3990 is an adjustable frequency monolithic buck  
switching regulator that accepts a wide input voltage  
range up to 60V, and consumes only 2.5μA of quiescent  
current. A high efficiency switch is included on the die  
along with the catch diode, boost diode, and the neces-  
saryoscillator, controlandlogiccircuitry. LowrippleBurst  
Mode operation maintains high efficiency at low output  
currents while keeping the output ripple below 5mV in a  
typical application. Current mode topology is used for fast  
transient response and good loop stability. A catch diode  
current limit provides protection against shorted outputs  
and overvoltage conditions. An enable pin with accurate  
threshold is available, producing a low shutdown current  
n
2.5μA I at 12V to 3.3V  
Q
IN  
OUT  
Output Ripple < 5mV  
P-P  
n
n
n
n
n
n
n
n
n
n
n
Wide Input Voltage Range: 4.2V to 60V Operating  
Adjustable Switching Frequency: 200kHz to 2.2MHz  
Integrated Boost and Catch Diodes  
350mA Output Current  
Accurate 1V Enable Pin Threshold  
Low Shutdown Current: I = 0.7μA  
Q
Internal Sense Limits Catch Diode Current  
Power Good Flag  
Output Voltage: 1.21V to 25V  
Internal Compensation  
Small 10-Pin MSOP and (3mm × 2mm) DFN Packages  
of 0.7μA. A power good flag signals when V  
reaches  
OUT  
90% of the programmed output voltage. The LT3990 is  
available in small 10-pin MSOP and 3mm × 2mm DFN  
packages.  
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
APPLICATIONS  
n
Automotive Battery Regulation  
Power for Portable Products  
n
n
Industrial Supplies  
TYPICAL APPLICATION  
5V Step-Down Converter  
Efficiency  
90  
V
= 12V  
V
IN  
IN  
6V TO 60V  
0.22μF  
80  
70  
V
BOOST  
LT3990  
IN  
22μH  
22pF  
V
OUT  
5V  
OFF ON  
EN  
PG  
SW  
BD  
350mA  
60  
50  
1M  
RT  
FB  
22μF  
2.2μF  
GND  
316k  
226k  
f = 600kHz  
3990 TA01a  
40  
30  
0.01  
0.1  
1
10  
100  
LOAD CURRENT (mA)  
3990 TA01b  
3990p  
1

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