lm27342sdx National Semiconductor Corporation, lm27342sdx Datasheet - Page 27

• 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

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 17. V
1.5 or 2A Buck Regulator
10 µF
0.1 µF
47 µF
22 µF
NOT MOUNTED
Schottky Diode Vf = 0.32V
0.56 µH
1.02 kΩ
5.10 kΩ
IN
= 3.3 - 9V, V
30005689
Bill of Materials for Figure 17
OUT
= 1.2V, f
27
Part Number
LM27341 / LM27342
GRM32DR71E106KA12L
GRM188R71C104KA01D
GRM32ER61A476KE20L
C3225X7R1C226K
CMS06
CDRH2D18/HPNP
CRCW06031K02FKEA
CRCW06035K10FKEA
SW
= 2 MHz, I
I
OUT
= 100 mA - 2A @ slewrate = 2A / µs
OUT
Transient Response
= Full Load
30005615
Manufacturer
National Semiconductor
Murata
Murata
Murata
TDK
Toshiba
Sumida
Vishay
Vishay
300056107
www.national.com