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LT3970EDDB-3.3#PBF PDF预览

LT3970EDDB-3.3#PBF

更新时间: 2024-02-23 20:13:23
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
22页 247K
描述
LT3970 Series - 40V, 350mA Step-Down Regulator with 2.5µA Quiescent Current and Integrated Diodes; Package: DFN; Pins: 10; Temperature Range: -40°C to 85°C

LT3970EDDB-3.3#PBF 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:3 X 2 MM, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-10
针数:10Reach Compliance Code:compliant
风险等级:5.09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:40 V最小输入电压:4.2 V
标称输入电压:12 VJESD-30 代码:R-PDSO-N10
JESD-609代码:e3长度:3 mm
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:0.865 A标称输出电压:3.3 V
封装主体材料:PLASTIC/EPOXY封装代码:HVSON
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:0.8 mm表面贴装:YES
切换器配置:BUCK最大切换频率:2640 kHz
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:NO LEAD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:2 mmBase Number Matches:1

LT3970EDDB-3.3#PBF 数据手册

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LT3970/LT3970-3.3/LT3970-5  
40V, 350mA Step-Down  
Regulator with 2.5µA  
Quiescent Current and  
Integrated Diodes  
FEATURES  
DESCRIPTION  
Low Ripple Burst Mode® Operation  
The LT®3970 is an adjustable frequency monolithic buck  
switching regulator that accepts a wide input voltage  
range up to 40V, 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
Wide Input Voltage Range: 4.2V to 40V Operating  
Adjustable Switching Frequency: 200kHz to 2.2MHz  
Integrated Boost and Catch Diodes  
350mA Output Current  
Fixed Output Voltages: 3.3V, 5V  
1.8μA I at 12V  
Q
IN  
n
n
n
n
n
n
n
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  
of 0.7μA. A power good flag signals when V  
reaches  
OUT  
Internal Compensation  
90% of the programmed output voltage. The LT3970 is  
available in small 10-pin MSOP and 3mm × 2mm DFN  
packages.  
Small 10-Pin MSOP and (3mm × 2mm) DFN Packages  
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.  
n
Automotive Battery Regulation  
n
Power for Portable Products  
n
Industrial Supplies  
TYPICAL APPLICATION  
5V Step-Down Converter  
Efficiency  
90  
1000  
100  
10  
V
= 12V  
V
IN  
IN  
6V TO 40V  
0.22μF  
80  
70  
60  
50  
40  
V
BOOST  
LT3970  
IN  
22μH  
22pF  
V
OUT  
5V  
OFF ON  
EN  
PG  
SW  
BD  
350mA  
1M  
1
RT  
FB  
22μF  
2.2μF  
GND  
316k  
226k  
f = 600kHz  
0.1  
0.01  
3490 TA01a  
0.01  
0.1  
1
10  
100  
LOAD CURRENT (mA)  
3970 TA01b  
3970fa  
1

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