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RT8055 Datenblatt(PDF) 12 Page - Richtek Technology Corporation

Teilenummer RT8055
Bauteilbeschribung  3A, 2MHz, Synchronous Step-Down Converter
PDF  14 Pages
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Hersteller  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8055 Datenblatt(HTML) 12 Page - Richtek Technology Corporation

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RT8055
12
DS8055-05
November 2012
www.richtek.com
©
Copyright
2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Component Supplier
Series
Inductance (
μH) DCR (mΩ) Current Rating (mA) Dimensions (mm)
TAIYO YUDEN
NR 8040
2
9
7800
8x8x4
Component Supplier
Part No.
Capacitance (
μF)
Case Size
TDK
C3225X5R0J226M
22
1210
TDK
C2012X5R0J106M
10
0805
Panasonic
ECJ4YB0J226M
22
1210
Panasonic
ECJ4YB1A106M
10
1210
TAIYO YUDEN
LMK325BJ226ML
22
1210
TAIYO YUDEN
JMK316BJ226ML
22
1206
TAIYO YUDEN
JMK212BJ106ML
10
0805
Table 2. Inductors
Table 3. Capacitors for CIN and COUT
Recommended component selection for Typical Application
Figure 4. PCB Layout Guide
VOUT
SHDN/RT
GND
PGND
LX
COMP
FB
VDD
PVDD
PVDD
LX
9
8
7
1
2
3
4
5
10
6
11
ROSC
RCOMP
CCOMP
R2
R1
CF
VOUT
GND
VIN
L1
COUT
CIN
CIN must be placed between VDD
and GND as closer as possible
LX should be
connected to Inductor
by wide and short
trace, keep sensitive
compontents away
from this trace
Output capacitor must be
near RT8055
Connect the FB pin directly to feedback resistors. The
resistor divider must be connected between VOUT and GND.



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