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LT8390H

更新时间： 2024-01-01 02:47:53
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
32页 1144K
描述
60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum

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LT8390H 数据手册

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LT8390  
60V Synchronous 4-Switch  
Buck-Boost Controller  
with Spread Spectrum  
DESCRIPTION  
FEATURES  
TheLT®8390isasynchronous4-switchbuck-boostDC/DC  
controller that regulates output voltage, input or output  
current from an input voltage above, below, or equal to  
theoutputvoltage. Theproprietarypeak-buck/peak-boost  
current mode control scheme allows adjustable and syn-  
chronizable 150kHz to 650kHz fixed frequency operation,  
or internal 15% triangle spread spectrum frequency  
n
4-Switch Single Inductor Architecture Allows V  
IN  
Above, Below or Equal to V  
OUT  
n
n
n
n
n
n
n
n
n
n
n
n
Synchronous Switching: Up to 98% Efficiency  
Proprietary Peak-Buck Peak-Boost Current Mode  
Wide V Range: 4V to 60V  
IN  
±1.5% Output Voltage Accuracy: 1V ≤ V  
≤ 60V  
OUT  
±3% Input or Output Current Accuracy with Monitor  
Spread Spectrum Frequency Modulation for Low EMI modulation for low EMI. With a 4V to 60V input voltage  
High Side PMOS Load Switch Driver  
Integrated Bootstrap Diodes  
No Top MOSFET Refresh Noise in Buck or Boost  
Adjustable and Synchronizable: 150kHz to 650kHz  
range,0Vto60Voutputvoltagecapability,andseamlesslow  
noise transitions between operation regions, the LT8390  
is ideal for voltage regulator, battery and supercapacitor  
charger applications in automotive, industrial, telecom,  
and even battery-powered systems.  
V
Disconnected from V During Shutdown  
OUT  
IN  
Available in 28-Lead TSSOP with Exposed Pad and  
The LT8390 provides input or output current monitor and  
powergoodflag.Faultprotectionisalsoprovidedtodetect  
output short-circuit condition, during which the LT8390  
retries, latches off, or keeps running.  
28-Lead QFN (4mm × 5mm)  
APPLICATIONS  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog  
Devices, Inc. All other trademarks are the property of their respective owners.  
Automotive, Industrial, Telecom Systems  
High Power Battery-Powered System  
n
TYPICAL APPLICATION  
98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator  
V
OUT  
12V  
4A  
120µF  
16V  
6uH  
4mΩ  
15mΩ  
V
IN  
4V TO 56V  
22µF  
63V  
×2  
10µF  
25V  
×2  
4.7µF  
100V  
×2  
0.1µF  
0.1µF  
120µF  
16V  
SW1 LSP  
BST1  
LSN  
SW2  
BST2  
Efficiency vs VIN  
BG1  
BG2  
100  
98  
96  
94  
92  
90  
88  
86  
GND  
TG1  
TG2  
V
LT8390  
V
OUT  
IN  
1µF  
1µF  
383k  
EN/UVLO  
LOADTG  
TEST  
ISP  
ISN  
FB  
100k  
165k  
SSFM OFF  
9.09k  
ISMON  
ISMON  
CTRL  
SYNC/SPRD  
INTV  
I
LIMIT 6.7A  
OUT  
SSFM ON  
CC  
4.7µF  
I
= 4A  
OUT  
100k  
LOADEN  
V
PGOOD  
PGOOD  
0
10  
20  
30  
40  
50  
60  
REF  
SS  
V
C
RT  
INPUT VOLTAGE (V)  
0.47µF  
8390 TA01a  
8390 TA01b  
100k  
400kHz  
0.1µF  
100pF  
27k  
4.7nF  
8390fa  
1
For more information www.linear.com/LT8390  
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