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LT3507EUHF-PBF PDF预览

LT3507EUHF-PBF

更新时间: 2024-01-18 21:28:48
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
28页 338K
描述
Triple Monolithic Step-Down Regulator with LDO

LT3507EUHF-PBF 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

LT3507EUHF-PBF 数据手册

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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 and LTM 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  
0.22μF  
V
4.7μH  
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  
3507f  
1

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