Datasheet

LM2738
V
IN
V
IN
EN
BOOST
SW
FB
GND
V
OUT
C3
L1
C2
R1
R2
D1
ON
OFF
D2
D3
C1
R3
LM2738
SNVS556B –APRIL 2008–REVISED APRIL 2013 www.ti.com
LM2738Y Circuit Example 10
Figure 45. LM2738Y (550kHz)
V
BOOST
Derived from Series Zener Diode (V
OUT
)
15V to 9V/1.5A
Table 11. Bill of Materials for Figure 45
Part ID Part Value Part Number Manufacturer
U1 1.5A Buck Regulator LM2738Y Texas Instruments
C1, Input Cap 10µF, 25V, X7R C3225X7R1E106M TDK
C2, Output Cap 22µF, 16V, X5R C3216X5R1C226M TDK
C3, Boost Cap 0.1µF, 16V, X7R C1005X7R1C104K TDK
D1, Catch Diode 0.34V
F
Schottky 1.5A, 30V CRS08 Toshiba
D2, Boost Diode 1V
F
@ 100mA Diode BAT54WS Diodes, Inc.
D3, Zener Diode 4.3V 350mw SOT-23 BZX84C4V3 Diodes, Inc.
L1 15µH, 2.1A SLF7055T150M2R1-3PF TDK
R1 102kΩ, 1% CRCW06031023F Vishay
R2 10.2kΩ, 1% CRCW06031022F Vishay
R3 100kΩ, 1% CRCW06031003F Vishay
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