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L6995D датащи(PDF) 21 Page - STMicroelectronics

номер детали L6995D
подробное описание детали  STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION
PDF  25 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6995D датащи(HTML) 21 Page - STMicroelectronics

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L6995
POWER SECTION
Notes: 1. N.M.=Not Mounted
2. The demoboard with this component list is set to give: VOUT = 1.8V, FSW = 250kHz with an input voltage around VIN = 20V and
with the integrator feature.
3. The diode efficiency impact is very low; it is not a necessary component.
4. All capacitors are intended ceramic type otherwise specified.
3.11.1Efficiency
Vin = 20V Vout = 1.8V Fsw = 270kHz
Figure 18. Efficiency vs output current
Part name
Value
Dimension
Notes
C10
100nF
0603
C11
100nF
0603
DIODE
D1
BAR18
INPUT CAPACITORS
C7, C13
10
µF
C34Y5U1E106ZTE12 TOKIN
OUTPUT CAPACITORS
C14, C15
330
µF
EEFUE0D331R
PANASONIC
INDUCTOR
L1
2.7
µH
DO3316P-272HC
COILCRAFT
2.2
µH
ETQP6H2R2GF
PANASONIC
3.3
µH
DQ7545
COEV
POWER MOS
Q1,Q2
STS8DNF3LL
STMicroelectronics
Double mos in sigle package
DIODE
D2
STPS3L40U
STMicroelectronics
3
30
40
50
60
70
80
90
0,0
0,5
1 ,0
1 ,5
2, 0
2 ,5
3,0
3 ,5
4,0
4, 5
5 ,0
5 ,5
6,0
Cu rre n t [A]
Ef f [ %]
Vin=20V Vou t=1.8V Fs w =2 70 K h z PW M
V in=20V V o ut=1 .8V Fs w =270Khz PFM



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