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LTC3833

更新时间： 2023-12-20 18:46:11
品牌 Logo 应用领域
亚德诺 - ADI 控制器
页数 文件大小 规格书
36页 517K
描述
具差分输出检测功能的快速、准确、降压型 DC/DC 控制器

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中文翻译

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LTC3833 数据手册

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LTC3833  
Fast Accurate Step-Down  
DC/DC Controller with  
Differential Output Sensing  
DESCRIPTION  
FEATURES  
The LTC®3833 is a synchronous step-down DC/DC  
switching regulator controller targeted for high power  
applications. It drives all N-channel power MOSFETs. The  
controlledon-timevalleycurrentmodearchitectureallows  
for both fast transient response and constant frequency  
n
Wide V Range: 4.5V to 38V  
OUT  
Output Accuracy: 0.ꢀ5ꢁ at ꢀ5ꢂ° and 0.6ꢃꢁ  
over Temperature  
Differential Output Sensing Allowing Up to 500mV  
Line Loss  
Fast Load Transient Response  
IN  
n
V
Range: 0.6V to 5.5V  
n
n
switching in steady-state operation, independent of V ,  
IN  
n
n
n
V
OUT  
and load current.  
t
= ꢀ0ns, t  
= 90ns  
ON(MIN)  
OFF(MIN)  
Differential output voltage sensing along with a precision  
internal reference combine to offer ±±.ꢀ67 output regula-  
tion and the ability to correct for up to ±ꢁ±±mV variations  
in the output terminals due to line losses. The operating  
frequency can be programmed from 2±±kHz to 2MHz with  
anexternalresistorandcanbesynchronizedtoanexternal  
clock for noise and EMI sensitive applications.  
°ontrolled On-Time Valley °urrent Mode  
Architecture  
n
Frequency Programmable from ꢀ00kHz to ꢀMHz  
and Synchronizable to External °lock  
n
n
n
n
n
n
R
or Inductor DCR Current Sensing  
SENSE  
Overvoltage Protection and Current Limit Foldback  
Power Good Output Voltage Monitor  
Very low t and t times allow for near ±7 and near  
Output Tracking or Adjustable Soft-Start  
ON  
OFF  
1±±7dutycycles,respectively.Programmablesoft-startor  
outputvoltagetrackingisavailable.Safetyfeaturesinclude  
outputovervoltageprotection,programmablecurrentlimit  
with foldback, and a power good output signal.  
External V Input for Bypassing Internal LDO  
CC  
2±-Pin QFN (3mm × 4mm) and TSSOP Packages  
APPLICATIONS  
n
L, LT, LTC, LTM, OPTI-LOOP, PolyPhase, µModule, Linear Technology and the Linear logo  
Distributed Power Systems  
are registered trademarks and Hot Swap, No R  
and UltraFast are trademarks of Linear  
SENSE  
n
Point-of-Load Converters  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including ꢁ481168, ꢁ486ꢁꢁ4, ꢀꢁ8±2ꢁ8, ꢀ3±4±ꢀꢀ, ꢀ46ꢀꢁ89,  
ꢀ664ꢀ11.  
n
Computing Systems  
Datacomm Systems  
n
TYPICAL APPLICATION  
1.5V, ꢀ0A, 300kHz High °urrent Step-Down °onverter  
INTV  
CC  
Efficiency  
V
IN  
4.5V TO 14V  
V
V
IN  
RNG  
100  
90  
80  
70  
60  
50  
40  
180µF  
V
PULSE-SKIPPING  
MODE  
OUT  
–
SENSE  
SENSE  
100k  
+
PGOOD  
RUN  
0.1µF  
3.24k  
TG  
SW  
FORCED  
CONTINUOUS  
MODE  
LTC3833  
0.1µF  
0.47µH  
V
1.5V  
20A  
OUT  
TRACK/SS  
BOOST  
470pF  
15k  
0.1µF  
INTV  
CC  
4.7µF  
10k  
I
INTV  
CC  
330µF  
TH  
137k  
×2  
RT  
10k  
EXTV  
CC  
BG  
V
V
= 12V  
IN  
OUT  
= 1.5V  
SGND  
PGND  
300kHz  
0.1  
1
10  
100  
MODE/PLLIN  
+
V
V
OSNS  
OSNS  
LOAD CURRENT (A)  
3833 TA01a  
–
3833 TA01b  
3833f  
1
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中文翻译

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