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參數(shù)資料
| 型號： | LT3493EDCB-3#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 3 MM, PLASTIC, MO-229, DFN-6 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大小： | 401K |
| 代理商： | LT3493EDCB-3#TR |
17
LT3493-3
3493-3f
APPLICATIO S I FOR ATIO
WU
U
0.78V Step-Down Converter
1.8V Step-Down Converter
TYPICAL APPLICATIO S
U
VIN
6.8V TO 25V
0.1
F
3.3
H
MBRM140
47
F
3493-3 TA02
2.2
F
VOUT
0.78V
1.2A
VIN
BOOST
GND
FB
SHDN
SW
LT3493-3
1N4148
ON OFF
VIN
6.8V TO 25V
0.1
F
5
H
MBRM140
26.1k
22
F
3493-3 TA03
2.2
F
20k
VOUT
1.8V
1.2A
VIN
BOOST
GND
FB
SHDN
SW
LT3493-3
1N4148
ON OFF
loss. The resulting temperature rise at full load is nearly
independent of input voltage. Thermal resistance de-
pends on the layout of the circuit board, but 64
°C/W is
typical for the (2mm
× 3mm) DFN (DCB) package.
Outputs Greater Than 6V
For outputs greater than 6V, add a resistor of 1k to 2.5k
across the inductor to damp the discontinuous ringing of
the SW node, preventing unintended SW current. The 12V
Step-Down Converter circuit in the Typical Applications
section shows the location of this resistor. Also note that
for outputs above 6V, the input voltage range will be
limited by the maximum rating of the BOOST pin. The 12V
circuit shows how to overcome this limitation using an
additional zener diode.
Other Linear Technology Publications
Application notes AN19, AN35 and AN44 contain more
detailed descriptions and design information for Buck
regulators and other switching regulators. The LT1376
data sheet has a more extensive discussion of output
ripple, loop compensation and stability testing. Design
Note DN100 shows how to generate a bipolar output
supply using a Buck regulator.
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| LT3494EDDB#PBF | 0.25 A SWITCHING REGULATOR, PDSO8 |
| LT3494EDDB | 0.25 A SWITCHING REGULATOR, PDSO8 |
| LT3502AEDC#PBF | 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT3502AIDC#PBF | 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT3502AIDC#TR | 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO10 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3493EDCBPBF | 制造商:LT 功能描述:Pb Free |
| LT3493EDCB-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3493EDCB-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| LT3493EDCBTRMPBF | 制造商:Linear Technology 功能描述:Sw. Regulator 1.2A 750kHz Step-Down DFN6 |
| LT3493EDCB-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
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