LM2734
V
IN
V
IN
EN
BOOST
SW
FB
GND
V
OUT
C3
L1
C2
R1
R2
D1
ON
OFF
D2
D3
C1
R3
LM2734
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SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013
Figure 31. LM2734X (1.6MHz)
V
BOOST
Derived from Series Zener Diode (V
OUT
)
15V to 9V/1A
Table 5. Bill of Materials for
Figure 31
Part ID
Part Value
Part Number
Manufacturer
U1
1A Buck Regulator
LM2734X
Texas Instruments
C1, Input Cap
10µF, 25V, X7R
C3225X7R1E106M
TDK
C2, Output Cap
22µF, 16V, X5R
C3216X5R1C226M
TDK
C3, Boost Cap
0.01µF, 16V, X7R
C1005X7R1C103K
TDK
D1, Catch Diode
0.4V
F
Schottky 1A, 30VR
SS1P3L
Vishay
D2, Boost Diode
1V
F
@ 50mA Diode
1N4148W
Diodes, Inc.
D3, Zener Diode
4.3V 350mw SOT
BZX84C4V3
Diodes, Inc.
L1
6.8µH, 1.6A,
SLF7032T-6R8M1R6
TDK
R1
102k
Ω
, 1%
CRCW06031023F
Vishay
R2
10.2k
Ω
, 1%
CRCW06031022F
Vishay
R3
100k
Ω
, 1%
CRCW06031003F
Vishay
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