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LTC1265CS-3.3 PDF预览

LTC1265CS-3.3

更新时间: 2024-01-27 20:16:01
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
16页 230K
描述
1.2A, High Efficiency Step-Down DC/DC Converter

LTC1265CS-3.3 技术参数

是否Rohs认证:不符合生命周期:Active
包装说明:PLASTIC, SOIC-14Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.74Is Samacsys:N
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:12 V
最小输入电压:5.4 V标称输入电压:10 V
JESD-30 代码:R-PDSO-G14JESD-609代码:e0
长度:8.65 mm湿度敏感等级:1
功能数量:1端子数量:14
最高工作温度:70 °C最低工作温度:
最大输出电流:1.2 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最大供电电流 (Isup):2.4 mA
表面贴装:YES切换器配置:BUCK
最大切换频率:700 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:3.9 mmBase Number Matches:1

LTC1265CS-3.3 数据手册

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LTC1265/LTC1265-3.3/LTC1265-5  
1.2A, High Efficiency  
Step-Down DC/DC Converter  
U
FEATURES  
DESCRIPTIO  
The LTC®1265 is a monolithic step-down current mode  
DC/DC converter featuring Burst Mode TM operation at low  
output current. The LTC1265 incorporates a 0.3switch  
(VIN =10V) allowing up to 1.2A of output current.  
High Efficiency: Up to 95%  
Current Mode Operation for Excellent Line and Load  
Transient Response  
Internal 0.3  
Power Switch (VIN = 10V)  
Short-Circuit Protection  
Under no load condition, the converter draws only 160µA.  
In shutdown it typically draws a mere 5µA making this  
converter ideal for current sensitive applications. In drop-  
out the internal P-channel MOSFET switch is turned on  
continuouslymaximizingthelifeofthebatterysource.The  
LTC1265incorporatesautomaticpowersavingBurstMode  
operation to reduce gate charge losses when the load  
currents drop below the level required for continuous  
operation.  
Low Dropout Operation: 100% Duty Cycle  
Low-Battery Detector  
Low 160µA Standby Current at Light Loads  
Active-High Micropower Shutdown: IQ < 15µA  
Peak Inductor Current Independent of Inductor Value  
Available in 14-pUin SO Package  
APPLICATIO S  
5V to 3.3V Conversion  
Theinductorcurrentisuser-programmableviaanexternal  
current sense resistor. Operation up to 700kHz permits  
the use of small surface mount inductors and capacitors.  
Distributed Power Systems  
Step-Down Converters  
Inverting Converters  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a trademark of Linear Technology Corporation.  
Memory Backup Supply  
Portable Instruments  
Battery-Powered Equipment  
Cellular Telephones  
U
TYPICAL APPLICATIO  
V
IN  
5.4V TO  
12V  
LTC1265-5 Efficiency  
†††  
+
C
IN  
100  
68µF  
20V  
0.1µF  
L1*  
R
**  
SENSE  
V
PWR V  
SHDN  
IN  
IN  
33µH  
V
5V  
1A  
0.1Ω  
OUT  
V
= 6V  
= 9V  
IN  
SW  
95  
90  
85  
80  
75  
70  
V
D1†  
IN  
LTC1265-5  
1k  
††  
+
C
OUT  
I
TH  
220µF  
PGND  
V
= 12V  
IN  
10V  
3900pF  
+
C
T
SENSE  
130pF  
1000pF  
L = 33µH  
V = 5V  
OUT  
SENSE  
R
T
= 0.1Ω  
* COILTRONICS CTX33-4  
SENSE  
SGND  
C
= 130pF  
** IRC LRC2010-01-R100-J  
MBRS130LT3  
†† AVX TPSE227K010  
††† AVX TPSE686K020  
0.01  
0.10  
LOAD CURRENT (A)  
1.00  
LTC1265-FO1  
LTC1265 TA01  
Figure 1. High Efficiency Step-Down Converter  
1

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