Datasheet

LM27341/2
V
IN
PVIN
EN
BOOST
SW
FB
GND / DAP
V
OUT
C2
L1
C1
C3
R1
R2
D1
SYNC
AVIN
CLK
2 MHz
ON
OFF
C5
C4
LM27341, LM27342, LM27341-Q1, LM27342-Q1
SNVS497E –NOVEMBER 2008–REVISED APRIL 2013 www.ti.com
Figure 61. V
IN
= 3.3 - 9V, V
OUT
= 1.2V, f
SW
= 2 MHz, I
OUT
= Full Load
Figure 62. LM27342 Efficiency vs. Load Current Figure 63. Transient Response
I
OUT
= 100 mA - 2A @ slewrate = 2A / µs
Table 9. Bill of Materials for Figure 61
Part Name Part ID Part Value Part Number Manufacturer
Buck Regulator U1 1.5 or 2A Buck Regulator LM27341 / LM27342 TI
C
PVIN
C1 10 µF GRM32DR71E106KA12L Murata
C
BOOST
C2 0.1 µF GRM188R71C104KA01D Murata
C
OUT
C3 47 µF GRM32ER61A476KE20L Murata
C
OUT
C4 22 µF C3225X7R1C226K TDK
C
FF
C5 NOT MOUNTED
Catch Diode D1 Schottky Diode Vf = 0.32V CMS06 Toshiba
Inductor L1 0.56 µH CDRH2D18/HPNP Sumida
Feedback Resistor R1 1.02 kΩ CRCW06031K02FKEA Vishay
Feedback Resistor R2 5.10 kΩ CRCW06035K10FKEA Vishay
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