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LTC3521EUF#PBF

更新时间： 2024-10-01 21:18:31
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
22页 374K
描述
LTC3521 - 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

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LTC3521EUF#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, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.55其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：1.8 V标称输入电压：3.6 V
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：85 °C最低工作温度：
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC24,.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）：NOT SPECIFIED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：1350 kHz技术：CMOS
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：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LTC3521EUF#PBF 数据手册

 浏览型号LTC3521EUF#PBF的Datasheet PDF文件第2页浏览型号LTC3521EUF#PBF的Datasheet PDF文件第3页浏览型号LTC3521EUF#PBF的Datasheet PDF文件第4页浏览型号LTC3521EUF#PBF的Datasheet PDF文件第5页浏览型号LTC3521EUF#PBF的Datasheet PDF文件第6页浏览型号LTC3521EUF#PBF的Datasheet PDF文件第7页 
LTC3521  
1A Buck-Boost DC/DC  
and Dual 600mA Buck  
DC/DC Converters  
FeaTures  
DescripTion  
TheLTC®3521combinesa1Abuck-boostDC/DCconverter  
anddual600mAsynchronousbuckDC/DCconverters.The  
1.1MHz switching frequency minimizes the solution foot-  
printwhilemaintaininghighefficiency.Allthreeconverters  
feature soft-start and internal compensation to minimize  
the solution footprint and simplify the design process.  
n
Three High Efficiency DC/DC Converters:  
Buck-Boost (V : 1.8V to 5.25V, I : 1A)  
OUT  
OUT  
Dual Buck (V : 0.6V to V , I : 600mA)  
OUT  
IN OUT  
n
n
n
1.8V to 5.5V Input Voltage Range  
Pin-Selectable Burst Mode® Operation  
30µA Total Quiescent Current in Burst Mode  
Operation  
The buck converters are current mode controlled and  
utilize an internal synchronous rectifier to improve ef-  
ficiency. The buck converters support 100% duty cycle  
operation to extend battery life. If the PWM pin is held  
low, the buck converters automatically transition from  
Burst Mode operation to PWM mode at high loads. With  
the PWM pin held high, the buck converters remain in low  
noise, 1.1MHz PWM mode.  
n
n
n
n
n
Independent Power Good Indicator Outputs  
Integrated Soft-Start  
Thermal and Overcurrent Protection  
<2µA Current in Shutdown  
Small 4mm × 4mm QFN and Thermally Enhanced  
TSSOP Packages  
applicaTions  
Thebuck-boostconverterfeaturescontinuousconduction  
operation to maximize efficiency and minimize noise. At  
light loads, the buck-boost converter can be operated in  
Burst Mode operation to improve efficiency and reduce  
no-load standby current.  
n
Bar Code Readers  
n
Medical Instruments  
n
Handy Terminals  
n
PDAs, Handheld PCs  
n
GPS Receivers  
The LTC3521 provides a <2μA shutdown mode, over-  
temperature shutdown and current limit protection  
on all converters. The LTC3521 is available in a 24-pin  
0.75mm × 4mm × 4mm QFN package, and a 20-pin ther-  
mally enhanced TSSOP package.  
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks  
and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U. S. Patents, including 6404251, 6166527.  
Typical applicaTion  
Efficiency vs VIN  
V
IN  
100  
98  
+
2.4V TO 4.2V  
4.7µF  
4.7µH  
Li-Ion  
V
= 3.3V  
4.7µH  
4.7µH  
PV  
SW1A  
V
IN  
PV  
OUT1  
= 500mA  
V
IN1  
IN2  
OUT2  
96  
94  
92  
90  
88  
86  
84  
82  
80  
78  
76  
74  
72  
70  
I
OUT  
SW2  
1.8V  
600mA  
137k  
10µF  
10µF  
SW1B  
V
OUT1  
3.3V  
FB2  
V
I
= 1.2V  
V
I
= 1.8V  
OUT3  
= 200mA  
V
OUT2  
= 200mA  
OUT1  
800mA  
(1A, V > 3.0V)  
68.1k  
OUT  
OUT  
22µF  
1.0M  
LTC3521  
IN  
FB1  
V
OUT3  
SW3  
FB3  
1.2V  
SHDN1  
SHDN2  
SHDN3  
PWM  
221k  
ON  
600mA  
OFF  
100k  
100k  
PGOOD1  
PGOOD2  
PGOOD3  
PWM  
BURST  
PGND1A  
PGND1B GND PGND2  
4.4  
2.4  
3.4  
5.4  
3521 TA01a  
V
(V)  
3521 TA01b  
IN  
3521fb  
1
For more information www.linear.com/LTC3521  
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LTC3521EUF#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC3521EUF#TRPBF Linear

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