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LT1317IS8 PDF预览

LT1317IS8

更新时间: 2024-11-05 22:22:51
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
16页 450K
描述
Micropower, 600kHz PWM DC/DC Converters

LT1317IS8 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:SOP, SOP8,.25
针数:8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.06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:12 V最小输入电压:1.5 V
标称输入电压:2 VJESD-30 代码:R-PDSO-G8
JESD-609代码:e0长度:4.9 mm
湿度敏感等级:1功能数量:1
端子数量:8最高工作温度:85 °C
最低工作温度:-40 °C最大输出电流:1.35 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP8,.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表面贴装:YES
切换器配置:BOOST最大切换频率:750 kHz
技术:BIPOLAR温度等级:INDUSTRIAL
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 mm
Base Number Matches:1

LT1317IS8 数据手册

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LT1317/LT1317B  
Micropower, 600kHz PWM  
DC/DC Converters  
U
DESCRIPTION  
FEATURES  
The LT®1317/LT1317B are micropower, fixed frequency  
step-up DC/DC converters that operate over a wide input  
voltage range of 1.5V to 12V. The LT1317 features auto-  
matic shifting to power saving Burst ModeTM operation at  
light loads. High efficiency is maintained over a broad  
300µA to 200mA load range. Peak switch current during  
Burst Mode operation is kept below 250mA for most  
operating conditions which results in low output ripple  
voltage, even at high input voltages. The LT1317B does  
notshiftintoBurstModeoperationatlightloads, eliminat-  
ing lowfrequency output rippleatthe expenseof light load  
efficiency.  
100µA Quiescent Current  
Operates with VIN as Low as 1.5V  
600kHz Fixed Frequency Operation  
Starts into Full Load  
Low-Battery Detector Active in Shutdown  
Automatic Burst Mode Operation at  
Light Load (LT1317)  
Continuous Switching at Light Loads (LT1317B)  
Low VCESAT Switch: 300mV at 500mA  
Pin for Pin Compatible with the LT1307/LT1307B  
U
APPLICATIONS  
The LT1317/LT1317B contain an internal low-battery de-  
tector with a 200mV reference that stays alive when the  
device goes into shutdown.  
Cellular Telephones  
Cordless Telephones  
Pagers  
No-load quiescent current of the LT1317 is 100µA and  
shuts down to 30µA. The internal NPN power switch  
handles a 500mA current with a voltage drop of just  
300mV.  
GPS Receivers  
Battery Backup  
Portable Electronic Equipment  
Glucose Meters  
Diagnostic Medical Instrumentation  
The LT1317/LT1317B are available in MS8 and SO-8  
packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
2-Cell to 3.3V Converter Efficiency  
L1  
10µH  
D1  
90  
2.2V  
3V  
IN  
IN  
+
C1  
V
LBI  
SW  
FB  
80  
70  
60  
50  
40  
IN  
47µF  
3.3V  
1.65V  
IN  
200mA  
LT1317  
R1  
1M  
1%  
2
SHUTDOWN  
SHDN  
V
C
LBO  
GND  
CELLS  
+
C2  
47µF  
R2*  
604k  
1%  
R
C
33k  
C
C
3.3nF  
D1: MBR0520  
L1: SUMIDA CD43-100  
* FOR 5V OUTPUT, R2 = 332k, 1%  
1317 F01  
0.3  
1
10  
100  
1000  
LOAD CURRENT (mA)  
Figure 1. 2-Cell to 3.3V Boost Converter  
1317 TA01  
1

LT1317IS8 替代型号

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