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LT3972EDD-TRPBF PDF预览

LT3972EDD-TRPBF

更新时间: 2024-02-20 08:33:20
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
24页 286K
描述
33V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current

LT3972EDD-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:HTSSOP,
针数:10Reach Compliance Code:compliant
风险等级:5.14其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 0.79 V TO 30 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:33 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:-40 °C
最大输出电流:6.2 A封装主体材料:PLASTIC/EPOXY
封装代码:HTSSOP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):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:2700 kHz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:NOT SPECIFIED宽度:3 mm
Base Number Matches:1

LT3972EDD-TRPBF 数据手册

 浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第2页浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第3页浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第4页浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第5页浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第6页浏览型号LT3972EDD-TRPBF的Datasheet PDF文件第7页 
LT3972  
33V, 3.5A, 2.4MHz  
Step-Down Switching Regulator  
with 75µA Quiescent Current  
FEATURES  
DESCRIPTION  
TheLT®3972isanadjustablefrequency(200kHzto2.4MHz)  
monolithic buck switching regulator that accepts input  
voltages up to 33V (62V Maximum). A high efficiency  
95mΩ switch is included on the die along with a boost  
Schottky diode and the necessary oscillator, control, and  
Wide Input Range:  
Operation from 3.6V to 33V  
Over-Voltage Lockout Protects Circuits  
Through 62V Transients  
3.5A Maximum Output Current  
Low Ripple (<15mV ) Burst Mode® Operation:  
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 LT3972 can fur-  
ther enhance low output current efficiency by drawing  
P-P  
IN  
I = 75μA at 12V to 3.3V  
Q
OUT  
Adjustable Switching Frequency: 200kHz to 2.4MHz  
Low Shutdown Current: I < 1μA  
Integrated Boost Diode  
Synchronizable Between 250kHz to 2MHz  
Power Good Flag  
Q
bias current from the output when V  
is above 3V.  
OUT  
Saturating Switch Design: 95mΩ On-Resistance  
Output Voltage: 0.79V to 30V  
Thermal Protection  
Soft-Start Capability  
Small 10-Pin Thermally Enhanced MSOP and  
(3mm × 3mm) DFN Packages  
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 91% of the programmed  
OUT  
output voltage. The LT3972 is available in 10-Pin MSOP  
and 3mm × 3mm DFN packages with exposed pads for  
low thermal resistance.  
APPLICATIONS  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Automotive Battery Regulation  
Distributed Supply Regulation  
Industrial Supplies  
Wall Transformer Regulation  
TYPICAL APPLICATION  
5V Step-Down Converter  
Efficiency  
100  
V
OUT  
V
IN  
5V  
6.3V TO 33V  
TRANSIENT  
TO 62V  
V
= 12V  
3.5A  
IN  
90  
80  
70  
60  
50  
V
BD  
IN  
V
= 30V  
IN  
RUN/SS  
BOOST  
OFF ON  
V
= 24V  
IN  
0.47μF  
4.7μH  
536k  
15k  
V
C
SW  
LT3972  
GND  
10μF  
RT  
680pF  
PG  
V
= 5V  
OUT  
L = 4.7μH  
63.4k  
SYNC  
FB  
f = 600kHz  
100k  
47μF  
0
0.5  
1
1.5  
2
2.5  
3.5  
3
OUTPUT CURRENT (A)  
3680 TA01a  
3680 TA01  
3972f  
1

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