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參數(shù)資料
| 型號： | LTC3412IFE#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6.5 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大小： | 214K |
| 代理商： | LTC3412IFE#TR |
LTC3412
14
3412fb
APPLICATIO S I FOR ATIO
WU
U
If we set the sum of R2 and R3 to 185k, then the following
equations can be solved:
RR
k
R
V
2
3
185
1
2
3
08
032
+=
.
The last two equations shown result in the following
values for R2 and R3: R2 = 110k , R3 = 75k. The value of
R1 can now be determined by solving the equation shown
below:
1
185
25
08
1 393
+=
=
R
k
V
Rk
.
A value of 392k will be selected for R1. Figure 4 shows the
complete schematic for this design example.
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC3412. Check the following in your layout.
1. A ground plane is recommended. If a ground plane layer
is not used, the signal and power grounds should be
segregated with all small-signal components returning to
the SGND pin at one point which is then connected to the
PGND pin close to the LTC3412. The exposed pad should
be connected to SGND.
2. Connect the (+) terminal of the input capacitor(s), CIN,
as close as possible to the PVIN pin. This capacitor
provides the AC current into the internal power MOSFETs.
3. Keep the switching node, SW, away from all sensitive
small-signal nodes.
4. Flood all unused areas on all layers with copper. Flood-
ing with copper will reduce the temperature rise of power
components. You can connect the copper areas to any DC
net (PVIN, SVIN, VOUT, PGND, SGND, or any other DC rail
in your system).
5. Connect the VFB pin directly to the feedback resistors.
The resistor divider must be connected between VOUT and
SGND.
Figure 3. LTC3412 Layout Diagram
Top Side
Bottom Side
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| LTC3412IFE | 6.5 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, PDSO16 |
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| LTC3496EUFD#PBF | SWITCHING CONTROLLER, 2300 kHz SWITCHING FREQ-MAX, PQCC28 |
| LTC3496EUFD#TRPBF | SWITCHING CONTROLLER, 2300 kHz SWITCHING FREQ-MAX, PQCC28 |
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