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LT1611

更新时间： 2024-10-25 22:51:47
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
12页 267K
描述
Inverting 1.4MHz Switching Regulator in SOT-23

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中文翻译

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LT1611 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOT-23包装说明：SOT-23, 5 PIN
针数：5Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE标称输入电压：5 V
JESD-30 代码：R-PDSO-G5JESD-609代码：e0
长度：2.9 mm功能数量：1
端子数量：5封装主体材料：PLASTIC/EPOXY
封装代码：LSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH认证状态：Not Qualified
座面最大高度：1.45 mm表面贴装：YES
切换器配置：BUCK-BOOST最大切换频率：1400 kHz
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
宽度：1.6 mmBase Number Matches：1

LT1611 数据手册

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LT1611  
Inverting 1.4MHz Switching  
Regulator in SOT-23  
U
DESCRIPTIO  
FEATURES  
TheLT®1611istheindustry’sfirstinverting5-leadSOT-23  
current mode DC/DC converter. Intended for use in small,  
low power applications, it operates from an input voltage  
as low as 1.1V and switches at 1.4MHz, allowing the use  
of tiny, low cost capacitors and inductors 2mm or less in  
height. Its small size and high switching frequency enable  
the complete DC/DC converter function to consume less  
than 0.25 square inches of PC board area. Capable of  
generating –5V at 150mA from a 5V supply or –5V at  
100mAfroma3Vsupply,theLT1611replacesnonregulated  
“charge pump” solutions in many applications.  
■
Very Low Noise: 1mVP–P Output Ripple  
■
–5V at 150mA from a 5V Input  
■
Better Regulation Than a Charge Pump  
■
Effective Output Impedance: 0.14Ω  
■
Uses Tiny Capacitors and Inductors  
■
Internally Compensated  
■
Fixed Frequency 1.4MHz Operation  
■
Low Shutdown Current: <1µA  
■
Low VCESAT Switch: 300mV at 300mA  
■
Tiny 5-Lead SOT-23 Package  
U
The LT1611 operates in a dual inductor inverting topology  
which filters the input side as well as the output side of the  
DC/DC converter. Fixed frequency switching ensures a  
cleanoutputfreefromlowfrequencynoisetypicallypresent  
with charge pump solutions. No load quiescent current of  
the LT1611 is 3mA, while in shutdown quiescent current  
drops to 0.5µA. The 36V switch allows VIN to VOUT  
differential of up to 33V.  
APPLICATIO S  
■
MR Head Bias  
■
Digital Camera CCD Bias  
■
LCD Bias  
GaAs FET Bias  
Positive-to-Negative Conversion  
■
■
The LT1611 is available in the 5-lead SOT-23 package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATIO  
C2  
L1A  
22µH  
L1B  
22µH  
Transient Response  
1µF  
V
IN  
5V  
D1  
V
V
SW  
OUT  
IN  
–5V  
SHDN  
LT1611  
150mA  
R1  
29.4k  
VOUT  
20mV/DIV  
AC COUPLED  
+
1200pF  
C1  
22µF  
C3  
22µF  
NFB  
GND  
R2  
10k  
150mA  
LOAD CURRENT  
50mA  
C1: AVX TAJB226M010  
C2: TAIYO YUDEN LMK212BJ105MG  
1611 TA01  
100µs/DIV  
1611 F10  
C3: TAIYO YUDEN JMK325BJ226MM (1210 SIZE)  
D1: MBR0520  
L1: SUMIDA CLS62-220 OR 2× MURATA LQH3C220 (UNCOUPLED)  
Figure 1. 5V to –5V, 150mA Low Noise Inverting DC/DC Converter  
1
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