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LT3507EUHFTRPBF PDF预览

LT3507EUHFTRPBF

更新时间： 2024-02-09 08:47:17
品牌 Logo 应用领域
LINEAR_DIMENSIONS 稳压器
页数 文件大小 规格书
28页 307K
描述
Triple Monolithic Step-Down Regulator with LDO

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LT3507EUHFTRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC38,.2X.28,20
针数：38Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE最大输入电压：36 V
最小输入电压：4 V标称输入电压：12 V
JESD-30 代码：R-PQCC-N38JESD-609代码：e3
长度：7 mm湿度敏感等级：1
功能数量：3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：6 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC38,.2X.28,20
封装形状：RECTANGULAR封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：0.8 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：2500 kHz技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

LT3507EUHFTRPBF 数据手册

 浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第2页浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第3页浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第4页浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第5页浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第6页浏览型号LT3507EUHFTRPBF的Datasheet PDF文件第7页 
LT3507  
Triple Monolithic Step-Down  
Regulator with LDO  
DESCRIPTION  
FEATURES  
The LT®3507 is a triple, current mode, DC/DC converter  
with internal power switches and a low dropout regulator.  
Theswitchingconvertersarestep-downconverterscapable  
of generating one 2.4A output and two 1.5A outputs. All  
three converters are synchronized to a single oscillator.  
The 2.4A output runs with opposite phase to the other two  
converters, reducing input ripple current. Each regulator  
has independent shutdown and soft-start circuits, and  
generates a power good signal when its output is in regu-  
lation, easing power supply sequencing and interfacing  
with microcontrollers and DSPs.  
n
Wide Input Range: 4V to 36V  
n
One 2.4A and Two 1.5A Output Switching  
Regulators with Internal Power Switches  
n
Low Dropout Linear Regulator with External  
Transistor  
n
Antiphase Switching Reduces Ripple  
n
Independent Run, Tracking/Soft-Start, and Power  
Good Indicators Ease Supply Sequencing  
n
Uses Small Inductors and Ceramic Capacitors  
n
Adjustable, 250kHz to 2.5MHz Switching Frequency,  
Synchronizable Over the Full Range  
n
User Programmable Overvoltage and Undervoltage  
Theswitchingfrequencyissetwithasingleresistoryielding  
arangeof250kHzto2.5MHz.Thehighswitchingfrequency  
allows the use of small inductors and capacitors resulting  
inaverysmalltripleoutputsupply.Theconstantswitching  
frequency, combinedwithlowimpedanceceramiccapaci-  
tors, results in low, predictable output ripple. With its wide  
input voltage range of 4V to 36V, the LT3507 regulates a  
broad array of power sources including 5V logic rails,  
unregulated wall transformers, lead acid batteries and  
distributed power supplies.  
Lockouts  
n
Thermally Enhanced, 38-Lead 5mm × 7mm QFN  
Package  
APPLICATIONS  
n
DSL and Cable Modems  
n
Distributed Power Regulation  
n
DSP Power  
Automotive  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
5V, 3.3V, 2.5V and 1.8V Step-Down Regulator  
Start-Up Waveforms—Coincident Tracking  
V
IN  
6V TO 36V  
22μF  
V
V
V
IN3  
IN1  
IN2  
BOOST1  
BOOST2  
V
V
OUT3  
4.7μH  
0.22μF  
V
OUT1  
1.8V  
2.4A  
SW1  
0.22μF  
10μH  
OUT2  
1V/DIV  
18.7k  
V
OUT4  
V
OUT1  
V
3.3V  
1.3A  
OUT2  
100μF  
SW2  
FB2  
FB1  
680pF  
15k  
18.7k  
V
C1  
22μF  
35.7k  
11.5k  
LT3507  
V
OUT2  
BOOST3  
SW3  
0.22μF  
3507 TA01b  
V
15μH  
OUT3  
5V  
1.5A  
1ms/DIV  
1000pF  
16.2k  
V
C2  
53.6k  
10.2k  
22μF  
FB3  
BIAS  
680pF  
24.3k  
DRIVE  
FB4  
V
C3  
V
2.5V  
0.2A  
24.3k  
11.5k  
OUT4  
R /SYNC  
T
107k  
2.2μF  
GND  
f
= 450kHz  
SW  
3507 TA01a  
3507fa  
1
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