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
www.ti.com SNVS556B –APRIL 2008–REVISED APRIL 2013
LM2738Y Circuit Example 9
Figure 44. LM2738Y (550kHz)
V
BOOST
Derived from Series Zener Diode (V
IN
)
15V to 1.5V/1.5A
Table 10. Bill of Materials for Figure 44
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 (47µF, 6.3V, X5R) x 2 = 94µF C3216X5ROJ476M 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 11V 350Mw SOT-23 BZX84C11T Diodes, Inc.
L1 8.7µH, 2.2A MSS7341-872NL Coilcraft
R1 8.87kΩ, 1% CRCW06038871F Vishay
R2 10.2kΩ, 1% CRCW06031022F Vishay
R3 100kΩ, 1% CRCW06031003F Vishay
Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 29
Product Folder Links: LM2738