LM2734
V
IN
V
IN
EN
BOOST
SW
FB
GND
V
OUT
C3
L1
C2
R1
R2
D1
D2
ON
OFF
D3
C4
R4
C1
R3
LM2734
SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013
www.ti.com
Figure 34. LM2734Y (550kHz)
V
BOOST
Derived from V
SHUNT
18V to 1.5V/1A
Table 8. Bill of Materials for
Figure 34
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
C4, Shunt Cap
0.1µF, 6.3V, X5R
C1005X5R0J104K
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
5.1V 250Mw SOT
BZX84C5V1
Vishay
L1
15µH, 1.5A
SLF7045T-150M1R5
TDK
R1
8.87k
Ω
, 1%
CRCW06038871F
Vishay
R2
10.2k
Ω
, 1%
CRCW06031022F
Vishay
R3
100k
Ω
, 1%
CRCW06031003F
Vishay
R4
4.12k
Ω
, 1%
CRCW06034121F
Vishay
22
Submit Documentation Feedback
Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links:
LM2734