Datasheet

C
IN
AVIN
CBOOT
SW
FB
PGOOD
RON
LM2696
V
IN
V
OUT
R
FB1
R
FB2
GND
C
OUT
R
ON
PVIN
SD
SS
EXTV
CC
C
EXT
C
BOOT
D
CATCH
L
C
SD
C
BY
V
PGOOD
V
SD
R
ff
C
ff
C
SS
C
AVIN
LM2696
www.ti.com SNVS375B –OCTOBER 2005–REVISED APRIL 2013
Figure 28. 12V-to 3.3V Voltage Applications Circuit
Table 2. Bill of Materials
(1)
Designator Function Description Vendor Part Number
C
IN
Input Cap 560 µF Sanyo 35MV560WX
C
BY
Bypass Cap 0.1 µF Vishay VJ0805Y104KXAM
C
SS
Soft-Start Cap 0.01 µF Vishay VJ080JY103KXX
C
EXT
EXTV
CC
1 µF Vishay VJ0805Y105JXACW1BC
C
BOOT
Boot 0.1 µF Vishay VJ0805Y104KXAM
C
AVIN
Analog V
IN
1 µF Vishay VJ0805Y105JXACW1BC
C
OUT
Output Cap 100 µF Sanyo 6SVPC100M
C
SD
Shutdown Cap 1 nF Vishay VJ0805Y102KXXA
C
ff
Feedforward Cap 560 pF Vishay VJ0805A561KXXA
R
ff
Feedforward Res 1 MΩ Vishay CRCW08051004F
R
FB1
High Side FB Res 1.62 kΩ Vishay CRCW08051621F
R
FB2
Low Side RB Res 1 kΩ Vishay CRCW08051001F
R
ON
On Time Res 143 kΩ Vishay CRCW08051433F
D
CATCH
Boot Diode 40V @ 3A Diode Central Semi CMSH3-40M-NST
L Output Inductor 10 uH, 5.4A ISAT Coilcraft MSS1278-103MX
(1) (Figure 28: Medium Voltage Board, 12V-to-3.3V conversion, f
sw
= 300 kHz)
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