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LT3462 PDF预览

LT3462

更新时间: 2024-11-24 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
12页 468K
描述
集成肖特基的反相1.2MHz/2.7MHz DC/DC转换器

LT3462 数据手册

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LT3462/LT3462A  
Inverting 1.2MHz/2.7MHz  
DC/DC Converters with  
Integrated Schottky  
DESCRIPTION  
The LT®3462/LT3462A are general purpose fixed fre‑  
quency current mode inverting DC/DC converters. Both  
devices feature an integrated Schottky and a low V  
switch allowing a small converter footprint and lCoEwSAeTr  
parts cost. The LT3462 switches at 1.2MHz while the  
LT3462A switches at 2.7MHz. These high speeds enable  
the use of tiny, low cost and low height capacitors and  
inductors.  
FEATURES  
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Integrated Schottky Rectifier  
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Fixed Frequency 1.2MHz/2.7MHz Operation  
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Very Low Noise: 1mV Output Ripple  
P-P  
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Low V  
Switch: 270mV at 250mA  
CESAT  
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n
n
n
n
n
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–5V at 100mA from 5V Input  
–12V at 30mA from 3.3V Input  
Low Input Bias Current GND Based FB Input  
Low Impedance (40Ω) 1.265V Reference Output  
High Output Voltage: Up to 38V  
Wide Input Range: 2.5V to 16V  
The LT3462/LT3462A operate in a dual inductor inverting  
topology that filters both the input and output currents.  
Uses Tiny Surface Mount Components  
Low Shutdown Current: <10µA  
Very low output voltage ripple approaching 1mV can  
P‑P  
be achieved when ceramic capacitors are used. Fixed fre‑  
quency switching ensures a clean output free from low  
frequency noise typically present with charge pump solu‑  
Low Profile (1mm) SOT23 (ThinSOT™) Package  
8‑Lead DFN (2mm × 2mm × 0.75mm) Package,  
LT3462A Only  
tions. The 40V switch allows a V to V  
differential of  
IN  
OUT  
up to 38V for dual inductor topologies.  
APPLICATIONS  
Both devices provide a low impedance 1.265V reference  
output to supply the feedback resistor network. A ground  
referenced, high impedance FB input allows high feedback  
resistor values without compromising output accuracy.  
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CCD Bias  
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LCD Bias  
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GaAs FET Bias  
All registered trademarks and trademarks are the property of their respective owners.  
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General Purpose Negative Voltage Supply  
TYPICAL APPLICATION  
5V to –5V, 100mA Inverting DC/DC Converter  
ꢌꢅꢎ  
Efficiency  
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A
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ꢇꢊꢋꢌꢉ  
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ꢜꢝꢇꢄ ꢒAꢍꢌ  
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Rev A  
1
Document Feedback  
For more information www.analog.com  

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