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LT8350

更新时间： 2024-09-24 14:58:07
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
24页 1591K
描述
40VIN、18VOUT、6A同步降压-升压型Silent Switcher

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中文翻译

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LT8350 数据手册

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LT8350  
40V , 18V , 6A Synchronous  
IN  
OUT  
Buck-Boost Silent Switcher  
FEATURES  
DESCRIPTION  
n
4-Switch Single Inductor Architecture Allows V  
The LT®8350 is a monolithic 4-switch synchronous buck-  
boost converter with Silent Switcher architecture to mini-  
mize EMI emissions while delivering high efficiency at  
high switching frequency. The switcher can regulate the  
output voltage, input or output current from input volt-  
ages above, below, or equal to the output voltage. The  
proprietary peak current mode control scheme allows  
adjustable and synchronizable 200kHz to 2MHz fixed fre-  
quency operation, or spread spectrum frequency modu-  
lation (SSFM) operation. With 3V to 40V input voltage  
range, 1V to 18V output voltage capability, and seam-  
less low noise transitions between operation regions, the  
LT8350 is ideal for voltage regulator, battery and super-  
capacitor charger applications in automotive, industrial,  
telecom, and battery powered systems.  
IN  
Above, Below or Equal to V  
OUT  
Silent Switcher® Architecture for Low EMI  
Up to 95% Efficiency at 2MHz  
n
n
n
n
n
n
n
n
n
n
n
Proprietary Peak Current Mode  
3V to 40V Input Voltage Range  
1V to 18V Output Voltage Range  
1ꢀ5% Output Voltage Regulation  
Output/Input Current Regulation and Monitor  
Constant-Voltage/Constant-Current Regulation  
High Side PMOS Load Switch Driver  
No Top MOSFET Refresh Noise in Buck or Boost  
200kHz to 2MHz Fixed Switching Frequency with  
External Frequency Synchronization and SSFM  
n
n
n
V
Disconnected from V During Shutdown  
OUT  
IN  
Small 4mm × 6mm 32-Pin LQFN Package  
AEC-Q100 Qualification in Progress  
The LT8350 provides input or output current monitor and  
power good flag. Robust fault protection is provided to  
detect output short-circuit condition, during which the  
LT8350 retries, latches off, or keeps running.  
APPLICATIONS  
n
Automotive, Industrial, Telecom Systems  
All registered trademarks and trademarks are the property of their respective owners.  
n
Voltage Regulator with Accurate Current Limit  
n
High Frequency Battery-Powered System  
USB-PD Source  
n
TYPICAL APPLICATION  
95% Efficient 24W (12V, 2A) 2MHz Buck-Boost Voltage Regulator  
with Output Current Limit  
100nF  
100nF  
Efficiency vs VIN  
2.2µH  
100  
95  
90  
85  
80  
75  
3.3A CURRENT LIMIT  
BST1 SW1  
SW2 BST2  
30mΩ  
V
12V  
4.7µF  
IN  
V
V
OUT  
IN  
+
8V TO 36V  
4.7µF  
499k  
110k  
22µF  
10µF  
EN/UVLO  
FB  
115k  
10k  
GND  
LT8350  
RP  
EXTV  
CC  
LOADEN  
1µF  
CLKOUT  
INTV  
CC  
1µF  
V
= 12V, f = 2MHz  
SW  
OUT  
ISP  
ISN  
100k  
I
= 2A  
= 2.5A  
OUT  
I
PGOOD  
OUT  
LOADTG  
ISMON  
V
REF  
0
5
10 15 20 25 30 35 40  
INPUT VOLTAGE (V)  
CURRENT MONITOR  
3.9k  
CTRL  
8350 TA01b  
V
C
220nF  
3.3nF  
SS  
SYNC/MODE RT  
8350 TA01a  
14.3k  
2MHz  
22nF  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
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