l6995 STMicroelectronics, l6995 Datasheet - Page 21

• Manufacturer Part Number: l6995
• Description: Step Down Controller For High Differential Input-output Conversion
• Manufacturer: STMicroelectronics

Notes: 1. N.M.=Not Mounted
3.11.1Efficiency
V
Figure 18. Efficiency vs output current
DIODE
INPUT CAPACITORS
OUTPUT CAPACITORS
INDUCTOR
POWER MOS
DIODE
in
= 20V V
2. The demoboard with this component list is set to give: V
3. The diode efficiency impact is very low; it is not a necessary component.
4. All capacitors are intended ceramic type otherwise specified.
Part name
C14, C15
C7, C13
Q1,Q2
with the integrator feature.
C10
C11
D1
D2
L1
out
= 1.8V F
Eff [ %]
9 0
8 0
7 0
6 0
5 0
4 0
3 0
0,0
sw
= 270kHz
V in=20V V ou t=1.8V Fs w =2 70 K h z PW M
STS8DNF3LL
0,5
STPS3L40U
BAR18
100nF
100nF
330 F
Value
2.7 H
2.2 H
3.3 H
10 F
1 ,0
1 ,5
2, 0
POWER SECTION
C34Y5U1E106ZTE12 TOKIN
2 ,5
Cu r r e n t [A]
STMicroelectronics
STMicroelectronics
DO3316P-272HC
OUT
ETQP6H2R2GF
EEFUE0D331R
PANASONIC
PANASONIC
COILCRAFT
Dimension
3,0
= 1.8V, F
DQ7545
COEV
0603
0603
3 ,5
V in =2 0V V o ut=1 .8V Fs w =2 7 0Khz PFM
SW
= 250kHz with an input voltage around V
4,0
4, 5
5 ,0
Double mos in sigle package
5 ,5
6,0
Notes
3
IN
= 20V and
L6995
21/25