LM2734
VIN
EN
BOOST
SW
FB
GND
C3
R1
R 2
D1
D2
V
OUT
C
FF
12V
V
IN
3.3V
L1
C1
ON
OFF
R3
C2
LM2734
www.ti.com
SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013
Figure 33. LM2734Y (550kHz)
V
BOOST
Derived from V
OUT
12V to 3.3V/1A
Table 7. Bill of Materials for
Figure 33
Part ID
Part Value
Part Number
Manufacturer
U1
1A Buck Regulator
LM2734Y
Texas Instruments
C1, Input Cap
10µF, 25V, X7R
C3225X7R1E106M
TDK
C2, Output Cap
22µF, 6.3V, X5R
C3216X5ROJ226M
TDK
C3, Boost Cap
0.01µF, 16V, X7R
C1005X7R1C103K
TDK
D1, Catch Diode
0.34V
F
Schottky 1A, 30VR
SS1P3L
Vishay
D2, Boost Diode
0.6V
F
@ 30mA Diode
BAT17
Vishay
L1
10µH, 1.6A,
SLF7032T-100M1R4
TDK
R1
31.6k
Ω
, 1%
CRCW06033162F
Vishay
R2
10.0 k
Ω
, 1%
CRCW06031002F
Vishay
R3
100k
Ω
, 1%
CRCW06031003F
Vishay
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