lm27342sdx National Semiconductor Corporation, lm27342sdx Datasheet - Page 20

• Manufacturer Part Number: lm27342sdx
• Description: 2 Mhz 1.5a/2a Wide Input Range Step-down Dc-dc Regulator With Frequency Synchronization
• Manufacturer: National Semiconductor Corporation

www.national.com
LM27341/LM27342 Circuit Examples
Part Name
Buck Regulator
C
C
C
C
C
Catch Diode
Inductor
Feedback Resistor
Feedback Resistor
PVIN
BOOST
OUT
OUT
FF
LM27342 Efficiency vs. Load Current
Part ID Part Value
U1
C1
C2
C3
C4
C5
D1
L1
R1
R2
FIGURE 10. V
1.5 or 2A Buck Regulator
10 µF
0.1 µF
22 µF
22 µF
0.18 µF
Schottky Diode Vf = 0.32V
2.2 µH
560Ω
140Ω
IN
30005677
= 7 - 16V, V
Bill of Materials for Figure 10
OUT
= 5V, f
20
Part Number
LM27341 / LM27342
GRM32DR71E106KA12L
GRM188R71C104KA01D
C3225X7R1C226K
C3225X7R1C226K
0603ZC184KAT2A
CMS06
CDRHD5D28RHPNP
CRCW0603560RFKEA
CRCW0603140RFKEA
SW
= 2 MHz, I
I
OUT
= 100 mA - 2A @ slewrate = 2A / µs
OUT
Transient Response
= Full Load
30005615
Manufacturer
National Semiconductor
Murata
Murata
TDK
TDK
AVX
Toshiba
Sumida
Vishay
Vishay
300056100