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LTC3899EFE#PBF

更新时间： 2024-01-04 21:26:23
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
38页 903K
描述
LTC3899 - 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller; Package: TSSOP; Pins: 38; Temperature Range: -40°C to 85°C

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中文翻译

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LTC3899EFE#PBF 技术参数

是否Rohs认证： 符合生命周期：Active
零件包装代码：TSSOP包装说明：4.40 MM, ROHS COMPLIANT, PLASTIC, TSSOP-38
针数：38Reach Compliance Code：compliant
风险等级：2.22Base Number Matches：1

LTC3899EFE#PBF 数据手册

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LTC3899  
60V Low I , Triple  
Q
Output, Buck/Buck/Boost  
Synchronous Controller  
DESCRIPTION  
FEATURES  
DualBuckPlusSingleBoost SynchronousControllers The LTC®3899 is a high performance triple output (buck/  
n
n
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Wide Bias Input Voltage Range: 4.5V to 60V  
Outputs Remain in Regulation Through Cold Crank  
Down to a 2.2V Input Supply Voltage  
buck/boost) DC/DC switching regulator controller that  
drives all N-channel synchronous power MOSFET stages.  
The constant frequency current mode architecture allows  
aphase-lockablefrequencyofupto850kHz. TheLTC3899  
n
n
n
n
n
n
n
n
n
n
n
Buck and Boost Output Voltages Up to 60V  
Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) operates from a wide 4.5V to 60V input supply range.  
No External Bootstrap Diodes Required  
Low Operating I : 29μA (One Channel On)  
When biased from the output of the boost converter or  
another auxiliary supply, the LTC3899 can operate from  
an input supply as low as 2.2V after start-up.  
Q
100% Duty Cycle for Boost Synchronous MOSFET  
Phase-Lockable Frequency (75kHz to 850kHz)  
Programmable Fixed Frequency (50kHz to 900kHz)  
Very Low Dropout Operation: 99% Duty Cycle (Bucks)  
The gate drive for the LTC3899 can be programmed from  
5V to 10V to allow the use of logic-level or standard-level  
FETs and to maximize efficiency. Internal switches in the  
top gate drivers eliminate the need for external bootstrap  
diodes. The 29μA no-load quiescent current extends op-  
eratingruntimeinbattery-poweredsystems.OPTI-LOOP®  
compensationallowsthetransientresponsetobeoptimized  
over a wide range of output capacitance and ESR values.  
Low Shutdown I : 3.6μA  
Q
Fixed or Adjustable Boost Output Voltage Saves I  
Q
Small 38-Lead 5mm × 7mm QFN and TSSOP Packages  
APPLICATIONS  
n
Automotive Always-On and Start-Stop Systems  
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are  
registered trademarks of Linear Technology Corporation. All other trademarks are the property  
of their respective owners. Protected by U.S. Patents including 5481178, 5705919, 5929620,  
6144194, 6177787, 6580258.  
n
Distributed DC Power Systems  
n
Multioutput Buck-Boost Applications  
TYPICAL APPLICATION  
High Efficiency Wide Input Range Dual 5V/8.5V Converter  
Efficiency vs Output Current  
V
OUT3  
95  
REGULATED AT 10V  
V
V
= 12V  
= 5V  
IN  
OUT  
33µF  
WHEN V < 10V  
IN  
RUN1, 2, 3  
V
BIAS  
TG1  
FOLLOWS V WHEN  
IN  
94  
93  
92  
91  
90  
89  
88  
Burst Mode OPERATION  
V
FB3  
V
IN  
> 10V  
0.1µF  
TG3  
BOOST1  
SW1  
4.9µH  
V
5V  
5A  
9mΩ  
OUT1  
0.1µF  
BOOST3  
SW3  
1.2µH  
3mΩ  
V
BG1  
IN  
2.2V TO 60V  
(START-UP  
ABOVE 5V)  
LTC3899  
33µF  
BG3  
+
–
SENSE1  
SENSE1  
357k  
–
+
SENSE3  
SENSE3  
GATE DRIVE (DRV  
)
V
CC  
FB1  
5V  
6V  
8V  
68.1k  
220µF  
DRV  
CC  
INTV  
CC  
4.7µF  
0.1µF  
10V  
TG2  
0.1µF  
0.01  
0.1  
1
10  
BOOST2  
SW2  
ITH1,2,3  
6.5µH  
V
8.5V  
3A  
15mΩ  
OUT2  
OUTPUT CURRENT(A)  
3899 TA01b  
BG2  
DRVSET  
VPRG3  
+
–
SENSE2  
SENSE2  
649k  
V
FB2  
GND  
68.1k  
68µF  
3899 TA01a  
3899fa  
1
For more information www.linear.com/LTC3899  
1234567...38

中文翻译

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