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LT3992EFE#PBF

更新时间： 2024-10-01 20:49:31
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
36页 739K
描述
LT3992 - Monolithic Dual Tracking 3A Step-Down Switching Regulator; Package: TSSOP; Pins: 38; Temperature Range: -40°C to 85°C

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中文翻译

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LT3992EFE#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP38,.25,20
针数：38Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：8.47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：60 V最小输入电压：3 V
标称输入电压：15 VJESD-30 代码：R-PDSO-G38
JESD-609代码：e3长度：9.7 mm
湿度敏感等级：1功能数量：1
端子数量：38最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：3 A
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP38,.25,20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）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：1.2 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：3000 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：NOT SPECIFIED宽度：4.4 mm
Base Number Matches：1

LT3992EFE#PBF 数据手册

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LT3992  
Monolithic Dual Tracking  
3A Step-Down Switching Regulator  
FeaTures  
DescripTion  
The LT®3992 is a dual current mode PWM step-down  
DC/DC converter with two internal 4.6A switches. Inde-  
n
Wide Input Range:  
– Operation from 3V to 60V  
Independent Supply, Shutdown, Soft-Start, UVLO,  
n
pendent input voltage, shutdown, feedback, soft-start,  
UVLO current limit and comparator pins for each channel  
simplify complex power supply tracking and sequencing  
requirements.  
Programmable Current Limit and Programmable  
Power Good for Each 3A Regulator  
n
Die Temperature Monitor  
n
Adjustable/Synchronizable Fixed Frequency  
To optimize efficiency and component size, both convert-  
ers have a programmable maximum current limit and are  
synchronized to either a common external clock input, or  
aresistorsettablefixed250kHzto2MHzinternaloscillator.  
A frequency divider is provided for channel 1 to further  
optimize component size. At all frequencies, a 180° phase  
relationshipbetweenchannelsismaintained,reducingvolt-  
age ripple and component size. A clock output is available  
for synchronizing multiple regulators.  
Operation from 250kHz to 2MHz with Synchronized  
Clock Output  
n
Independent Synchronized Switching Frequencies  
Optimize Component Size  
n
Antiphase Switching  
n
Outputs Can Be Paralleled  
n
Flexible Output Voltage Tracking  
n
Low Dropout: 95% Maximum Duty Cycle  
n
5mm × 5mm QFN Package  
Minimum input to output voltage ratios are improved by  
allowingtheswitchtostayonthroughmultipleclockcycles  
onlyswitchingoffwhentheboostcapacitorneedsrecharg-  
ing. Independent channel operation can be programmed  
using the SHDN pin. Disabling both converters reduces  
the total quiescent current to <10µA.  
n
FMEA Compliant 38-Pin Exposed Pad TSSOP Package  
applicaTions  
n
Automotive Supplies  
Distributed Supply Regulation  
n
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of  
Linear Technology Corporation. All other trademarks are the property of their respective owners.  
Typical applicaTion  
12V and 5V 2-Stage Multi-Frequency Step-Down Converter  
Independent Synchronized  
Switching Frequencies Extend  
Full Frequency Input Range  
V
IN1  
15V TO 60V  
4.7µF  
V
OUT2  
V
V
IN2  
IN1  
SHDN1  
SHDN2  
CH1  
400kHz  
20V/DIV  
BST1  
SW1  
BST2  
SW2  
22µH  
2.2µH  
FB1  
0.1µF  
22µF  
0.1µF  
8.06k  
IND1  
IND2  
V
V
OUT2  
OUT1  
12V  
LT3992  
5V  
V
OUT1  
V
OUT2  
FB2  
2A  
1600kHz  
1A  
CH2  
1.6MHz  
5V/DIV  
113k  
42.2k  
FB1  
400kHz  
47µF  
8.06k  
100k  
CMPI1  
CMPI2  
CMPO1  
CMPO2  
PG  
SS1  
ILIM1  
SS2  
ILIM2  
3992 TA01b  
500ns/DIV  
V
= 60V  
IN  
V
V
C2  
C1  
RT/SYNC CLKOUT  
DIV  
CLKOUT  
1600kHz  
0.1µF  
100k  
33pF  
33pF  
680pF  
0.1µF  
680pF  
T
J
GND  
10nF  
60.4k  
15k  
48.7k  
102k  
10k  
3992 TA01a  
3992fa  
1
For more information www.linear.com/LT3992  
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