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LT3477IUF#PBF

更新时间： 2024-02-17 12:29:47
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
22页 566K
描述
LT3477 - 3A, DC/DC Converter with Dual Rail-to-Rail Current Sense; Package: QFN; Pins: 20; Temperature Range: -40°C to 85°C

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LT3477IUF#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, LCC20,.16SQ,20
针数：20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.38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：25 V最小输入电压：2.5 V
标称输入电压：2.5 VJESD-30 代码：S-PQCC-N20
JESD-609代码：e3长度：4 mm
湿度敏感等级：1功能数量：1
端子数量：20最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：5 A
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装等效代码：LCC20,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
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-BOOST最大切换频率：4300 kHz
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：30
宽度：4 mmBase Number Matches：1

LT3477IUF#PBF 数据手册

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LT3477  
3A, DC/DC Converter  
with Dual Rail-to-Rail  
Current Sense  
FeaTures  
DescripTion  
TheLT®3477isacurrentmode,3ADC/DCstep-upconverter  
withdualrail-to-railcurrentsenseamplifiersandaninternal  
3A, 42V switch. It combines a traditional voltage feedback  
loop and two unique current feedback loops to operate  
as a constant-current, constant-voltage source. Both cur-  
rent sense voltages are set at 100mV and can be adjusted  
n
Dual 100mV Rail-to-Rail Current Sense Amplifiers  
n
Wide Input Voltage Range: 2.5V to 25V  
n
3A, 42V Internal Switch  
n
High Efficiency Power Conversion: Up to 93%  
n
Drives LEDs in Boost, Buck-Boost or Buck Mode  
n
Frequency Set by External Resistor: 200kHz to 3.5MHz  
n
Programmable Soft-Start  
independently using the I  
and I  
pins. Efficiency  
ADJ1  
ADJ2  
n
Low V  
Switch: 0.3V at 2.5A  
of up to 93% can be achieved in typical applications. The  
LT3477 features a programmable soft-start function to  
limit inductor current during start-up. Both inputs of the  
error amplifier are available externally allowing positive  
and negative output voltages (boost, inverting, SEPIC,  
Flyback). The switching frequency is programmable from  
200kHz to 3.5MHz through an external resistor.  
CESAT  
n
n
Capable of Positive and Negative Output Voltages  
(Boost, Inverting, SEPIC, Flyback)  
Available in Thermally Enhanced 20-Lead  
(4mm × 4mm) QFN and 20-Lead TSSOP Packages  
applicaTions  
Available in thermally enhanced 20-pin (4mm × 4mm)  
QFN and 20-pin TSSOP packages, the LT3477 provides a  
completesolutionforbothconstant-voltageandconstant-  
current applications.  
n
High Power LED Driver  
n
DSL Modems  
n
Distributed Power  
n
Input/Output Current Limited Boost, SEPIC,  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Inverting, Flyback Converters  
n
Constant-Voltage, Constant-Current Source  
Typical applicaTion  
330mA LED Driver With Open LED Protection  
Efficiency  
10µH  
90  
85  
80  
75  
70  
65  
60  
55  
V
IN  
5V  
3.3µF  
3.3µF  
200k  
10k  
I
I
SW  
SP1  
SN1  
V
FBN  
IN  
I
I
ADJ1  
ADJ2  
LT3477  
SHDN  
SHDN  
I
SP2  
0.3Ω  
V
V
I
C
SN2  
R
REF  
T
FBP  
GND  
SS  
1k  
330mA  
50  
0.2  
(A)  
0
0.1  
0.3  
0.4  
22k  
33nF  
I
OUT  
4.7nF  
3477 TA01b  
3477 TA01a  
3477fd  
1
For more information www.linear.com/LT3477  
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LT3477IUF#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT3477EUF#PBF Linear

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