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LT1931IS5#TRM

更新时间： 2024-11-29 14:52:47
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
12页 425K
描述
LT1931 - 1.2MHz/2.2MHz Inverting DC/DC Converters in ThinSOT; Package: SOT; Pins: 5; Temperature Range: -40°C to 85°C

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LT1931IS5#TRM 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：SOT包装说明：VSSOP, TSOP5/6,.11,37
针数：5Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.08Is Samacsys：N
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：16 V
最小输入电压：2.6 V标称输入电压：3 V
JESD-30 代码：R-PDSO-G5JESD-609代码：e0
长度：2.9 mm湿度敏感等级：1
功能数量：1端子数量：5
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：2 A封装主体材料：PLASTIC/EPOXY
封装代码：VSSOP封装等效代码：TSOP5/6,.11,37
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：235认证状态：Not Qualified
座面最大高度：1 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：1600 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：0.95 mm
端子位置：DUAL处于峰值回流温度下的最长时间：20
宽度：1.625 mmBase Number Matches：1

LT1931IS5#TRM 数据手册

 浏览型号LT1931IS5#TRM的Datasheet PDF文件第2页浏览型号LT1931IS5#TRM的Datasheet PDF文件第3页浏览型号LT1931IS5#TRM的Datasheet PDF文件第4页浏览型号LT1931IS5#TRM的Datasheet PDF文件第5页浏览型号LT1931IS5#TRM的Datasheet PDF文件第6页浏览型号LT1931IS5#TRM的Datasheet PDF文件第7页 
LT1931/LT1931A  
1.2MHz/2.2MHz Inverting  
DC/DC Converters in ThinSOT  
U
FEATURES  
DESCRIPTIO  
The LT®1931/LT1931A are the industry’s highest power  
inverting SOT-23 current mode DC/DC converters. Both  
parts include a 1A integrated switch allowing high current  
outputs to be generated in a small footprint. The LT1931  
switchesat1.2MHzwhiletheLT1931Aswitchesat2.2MHz.  
These high speeds enable the use of tiny, low cost  
capacitors and inductors 2mm or less in height. The  
LT1931 is capable of generating –5V at 350mA or –12V  
at 150mA from a 5V supply, while the LT1931A can  
generate –5V at 300mA using significantly smaller induc-  
tors. Both parts are easy pin-for-pin upgrades for higher  
power LT1611 applications.  
■
Fixed Frequency 1.2MHz/2.2MHz Operation  
■
Very Low Noise: 1mVP-P Output Ripple  
■
–5V at 350mA from 5V Input  
–12V at 150mA from 5V Input  
■
■
Uses Small Surface Mount Components  
■
Wide Input Range: 2.6V to 16V  
■
Low Shutdown Current: <1µA  
■
Low VCESAT Switch: 400mV at 1A  
■
Pin-for-Pin Compatible with the LT1611  
Low Profile (1mm) ThinSOTTM Package  
■
U
APPLICATIO S  
The LT1931/LT1931A operate in a dual inductor inverting  
topology that filters both the input side and output side  
current.Verylowoutputvoltagerippleapproaching1mVP-P  
canbeachievedwhenceramicoutputcapacitorsareused.  
Fixed frequency switching ensures a clean output free  
from low frequency noise typically present with charge  
pumpsolutions.Thelowimpedanceoutputremainswithin  
1% of nominal during large load steps. The 36V switch  
allows VIN to VOUT differential of up to 34V.  
■
Disk Drive MR Head Bias  
■
Digital Camera CCD Bias  
■
LCD Bias  
GaAs FET Bias  
Local Low Noise/Low Impedance Negative Supply  
■
■
The LT1931/LT1931A are available in the 5-lead ThinSOT  
package.  
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a  
trademark of Linear Technology Corporation. All other trademarks are the property of their  
respective owners.  
U
TYPICAL APPLICATIO  
C2  
1µF  
Efficiency  
L1A  
L1B  
10µH  
10µH  
V
IN  
5V  
100  
95  
D1  
90  
85  
80  
75  
70  
65  
60  
55  
50  
V
V
SW  
OUT  
IN  
–5V  
SHDN  
350mA  
R1  
C4  
220pF  
LT1931  
GND  
29.4k  
C1  
4.7µF  
C3  
22µF  
NFB  
R2  
10k  
C1: TAIYO YUDEN X5R JMK212BJ475MG  
C2: TAIYO YUDEN X5R LMK212BJ105MG  
C3: TAIYO YUDEN X5R JMK325BJ226MM  
D1: ON SEMICONDUCTOR MBR0520  
L1: SUMIDA CLS62-100  
1931 F01  
0
100 150 200 250 300 350  
LOAD CURRENT (mA)  
50  
1931 TA01  
Figure 1. 5V to –5V, 350mA Inverting DC/DC Converter  
1931fa  
1
1234567...12

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