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LTC1574CS-3.3 PDF预览

LTC1574CS-3.3

更新时间: 2024-11-20 22:15:51
品牌 Logo 应用领域
凌特 - Linear 转换器稳压器开关式稳压器或控制器电源电路肖特基二极管开关式控制器光电二极管
页数 文件大小 规格书
8页 228K
描述
High Efficiency Step-Down DC/DC Converters with Internal Schottky Diode

LTC1574CS-3.3 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SOIC包装说明:0.150 INCH, PLASTIC, SO-16
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.13模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:CONSTANT OFF TIME
最大输入电压:16 V最小输入电压:4 V
标称输入电压:9 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:9.9 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:70 °C
最低工作温度:最大输出电流:1 A
标称输出电压:3.3 V封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.75 mm子类别:Switching Regulator or Controllers
最大供电电流 (Isup):0.6 mA表面贴装:YES
切换器配置:BUCK最大切换频率:200 kHz
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:20宽度:3.899 mm
Base Number Matches:1

LTC1574CS-3.3 数据手册

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LTC1574  
LTC1574-3.3/LTC1574-5  
High Efficiency Step-Down  
DC/DC Converters  
with Internal Schottky Diode  
U
FEATURES  
DESCRIPTION  
The LTC®1574 is a family of easy-to-use current mode  
DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V  
and inverting operation. With an internal 0.9switch (at  
a supply voltage of 12V) and a low forward drop Schottky  
diode (0.450V typ at 200mA, TA = 25°C), the LTC1574  
requires only three external components to construct a  
complete high efficiency DC/DC converter.  
High Efficiency: Up to 94%  
Usable in Noise-Sensitive Products  
Peak Inductor Current Independent of Inductor Value  
Short-Circuit Protection  
Internal Low Forward Drop Schottky Diode  
Only Three External Components Required  
Wide VIN Range: 4V to 18.5V (Absolute Maximum)  
Low Dropout Operation  
Low-Battery Detector  
Under no load condition, the LTC1574 draws only 130µA.  
In shutdown, it draws a mere 2µA making this converter  
ideal for battery-powered applications. In dropout, the  
internal P-channel MOSFET switch is turned on continu-  
ously allowing the user to maximize the life of the battery  
source.  
Pin Selectable Current Limit  
Internal 0.9Power Switch: VIN = 12V  
Standby Current: 130µA  
Active Low Micropower Shutdown  
U
The maximum inductor current of the LTC1574 family is  
pin selectable to either 340mA or 600mA, optimizing  
efficiency for a wide range of applications. Operation up to  
200kHz permits the use of small surface mount inductors  
and capacitors.  
APPLICATIONS  
Inverting Converters  
Step-Down Converters  
Memory Backup Supply  
Portable Instruments  
For applications requiring higher output current or ultra-  
highefficiency,seetheLTC1148andLTC1265datasheets.  
For detailed applications information, see the LTC1174  
data sheet.  
Battery-Powered Equipment  
Distributed Power Systems  
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
LTC1574-5 Efficiency  
High Efficiency Step-Down Converter  
100  
V
IN  
L = 100µH  
5.5V to  
16V  
V
= 5V  
= 0V  
OUT  
I
PGM  
95  
90  
85  
80  
75  
70  
V
= 6V  
= 9V  
+
IN  
5
22µF*  
V
35V  
IN  
12  
11  
6
7
LB  
LB  
SHDN  
IN  
V
IN  
10  
LTC1574-5  
V
OUT  
OUT  
100µH  
5V  
175mA  
3, 14  
I
SW  
PGM  
+
100µF*  
10V  
GND  
2, 4, 13, 15  
*
AVX TPSD226K035  
1574 TA01  
** AVX TPSD107K010  
1
10  
LOAD CURRENT (mA)  
100 200  
COILTRONICS CTX100-4  
1574 TA02  
1

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