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LT3481EMSE#PBF PDF预览

LT3481EMSE#PBF

更新时间: 2024-11-13 19:38:51
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
24页 305K
描述
LT3481 - 36V, 2A, 2.8MHz Step-Down Switching Regulator with 50µA Quiescent Current; Package: MSOP; Pins: 10; Temperature Range: -40°C to 85°C

LT3481EMSE#PBF 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, TSSOP10,.19,20
针数:10Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.33其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 1.265 V TO 20 V
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:34 V
最小输入电压:3.6 V标称输入电压:10 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:1端子数量:10
最高工作温度:125 °C最低工作温度:
最大输出电流:4.4 A封装主体材料:PLASTIC/EPOXY
封装代码:HTSSOP封装等效代码:TSSOP10,.19,20
封装形状:SQUARE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:1.0124 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:3100 kHz温度等级:OTHER
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

LT3481EMSE#PBF 数据手册

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LT3481  
36V, 2A, 2.8MHz Step-Down  
Switching Regulator with  
50µA Quiescent Current  
FEATURES  
DESCRIPTION  
TheLT®3481isanadjustablefrequency(300kHzto2.8MHz)  
monolithic buck switching regulator that accepts input  
voltages up to 34V (36V maximum). A high efficiency  
0.18Ω switch is included on the die along with a boost  
Schottky diode and the necessary oscillator, control, and  
logic circuitry. Current mode topology is used for fast  
transient response and good loop stability. Low ripple  
Burst Mode operation maintains high efficiency at low  
output currents while keeping output ripple below 15mV  
in a typical application. In addition, the LT3481 can fur-  
ther enhance low output current efficiency by drawing  
Wide Input Range: 3.6V to 34V Operating,  
36V Maximum  
2A Maximum Output Current  
Low Ripple Burst Mode® Operation  
50μA I at 12V to 3.3V  
Q
IN  
OUT  
Output Ripple < 15mV  
Adjustable Switching Frequency: 300kHz to 2.8MHz  
Low Shutdown Current: I < 1μA  
Q
Integrated Boost Diode  
Power Good Flag  
Saturating Switch Design: 0.18Ω On-Resistance  
1.265V Feedback Reference Voltage  
Output Voltage: 1.265V to 20V  
Soft-Start Capability  
Synchronizable Between 275kHz to 475kHz  
Small 10-Pin Thermally Enhanced MSOP and  
(3mm x 3mm) DFN Packages  
bias current from the output when V  
is above 3V.  
OUT  
Shutdown reduces input supply current to less than 1μA  
while a resistor and capacitor on the RUN/SS pin provide a  
controlled output voltage ramp (soft-start). A power good  
flag signals when V  
reaches 90% of the programmed  
OUT  
output voltage. The LT3481 is available in 10-Pin MSOP  
and 3mm x 3mm DFN packages with exposed pads for  
low thermal resistance.  
APPLICATIONS  
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.  
Automotive Battery Regulation  
Power for Portable Products  
Distributed Supply Regulation  
Industrial Supplies  
Wall Transformer Regulation  
TYPICAL APPLICATION  
3.3V Step-Down Converter  
Efficiency  
V
V
3.3V  
2A  
90  
80  
70  
60  
50  
10000.0  
1000.0  
100.0  
10.0  
IN  
OUT  
4.5V TO  
34V  
V
BD  
IN  
RUN/SS  
BOOST  
OFF ON  
16.2k  
0.47μF  
4.7μH  
V
C
SW  
LT3481  
GND  
4.7μF  
RT  
PG  
330pF  
1.0  
BIAS  
FB  
V
V
= 12V  
IN  
OUT  
324k  
= 3.3V  
40  
30  
0.1  
60.4k  
L = 4.7μ  
F = 800 kHz  
200k  
22μF  
0.01  
0.0001 0.001  
0.01  
0.1  
1
10  
LOAD CURRENT (A)  
3481 TA01  
3481 TA01b  
3481fc  
1

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