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LTC3533EDE#TRMPBF PDF预览

LTC3533EDE#TRMPBF

更新时间: 2024-09-24 14:52:47
品牌 Logo 应用领域
亚德诺 - ADI 开关光电二极管
页数 文件大小 规格书
18页 569K
描述
Switching Regulator

LTC3533EDE#TRMPBF 数据手册

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LTC3533  
2A Wide Input Voltage  
Synchronous Buck-Boost  
DC/DC Converter  
Description  
Features  
The LTC®3533 is a wide V range, highly efficient, fixed  
n
Regulated Output with Input Voltages Above,  
IN  
Below or Equal to the Output  
frequency, buck-boost DC/DC converter that operates  
from input voltages above, below or equal to the output  
voltage. The topology incorporated in the IC provides a  
continuoustransferfunctionthroughalloperatingmodes,  
makingtheproductidealforsinglecelllithium-ion/polymer  
or multi-cell alkaline/NiMH applications where the output  
voltage is within the input voltage range.  
n
1.8V to 5.5V (Input) and 5.25V (Output)  
Voltage Range  
n
0.8A Continuous Output Current: V > 1.8V  
IN  
n
2A Continuous Output Current: V > 3V  
IN  
n
Single Inductor  
n
Synchronous Rectification: Up to 96% Efficiency  
Programmable Burst Mode® Operation: I = 40µA  
n
Q
The LTC3533 features programmable Burst Mode oper-  
n
Output Disconnect in Shutdown  
ation, extended V and V  
ranges down to 1.8V, and  
IN  
OUT  
n
Programmable Frequency from 300kHz to 2MHz  
increased output current. Switching frequencies up to  
2MHzareprogrammedwithanexternalresistor. TheBurst  
Modethresholdisprogrammedwithasingleresistorfrom  
the BURST pin to GND.  
n
<1µA Shutdown Current  
n
Small Thermally Enhanced 14-Lead (3mm × 4mm ×  
0.75mm) DFN package  
Otherfeaturesinclude1µAshutdowncurrent, shortcircuit  
protection, programmable soft-start, current limit and  
thermalshutdown.TheLTC3533ishousedinthethermally  
enhanced14-lead(3mm×4mm×0.75mm)DFNpackage.  
applications  
n
GSM Modems  
n
Handheld Instruments  
n
Digital Cameras  
L, LT, LTC, LTM, Linear Technology, BurstMode and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective owners.  
n
Smart Phones  
n
Media Players  
n
Miniature Hard Disk Drive Power  
typical application  
2.2μH  
Efficiency  
100  
SW1  
PV  
SW2  
V
3.3V  
1.5A  
OUT  
90  
80  
70  
V
IN  
PV  
IN  
OUT  
OUT  
2.4V TO 4.2V  
Burst Mode  
OPERATION  
340k  
6.49k  
47pF  
V
V
IN  
LTC3533  
RUN/SS  
60  
50  
OFF ON  
FB  
V
= 2.9V  
IN  
330pF  
107k  
V
= 2.2V  
IN  
R
T
V
C
40  
30  
20  
10  
0
10μF  
100μF  
V
= 3.9V  
4.7pF  
IN  
BURST  
PGND  
0.1μF  
SGND  
33.2k  
200k  
200k  
0.1  
1
10  
100  
1000  
10000  
3533 TA01  
OUTPUT CURRENT (mA)  
3533 TA01b  
3533fc  
1
For more information www.linear.com/LTC3533  

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