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RT9277APF Arkusz danych(PDF) 2 Page - Richtek Technology Corporation

Numer części RT9277APF
Szczegółowy opis  High Performance, Low Noise Boost Converter
PDF  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  RICHTEK [Richtek Technology Corporation]
Strona internetowa  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9277APF Arkusz danych(HTML) 2 Page - Richtek Technology Corporation

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RT9277A/B
Preliminary
2
DS9277A/B-02 March 2007
www.richtek.com
Function Block Diagram
Typical Application Circuit
RT9277A
Table 1. Component Selection
Symbol
(unit)
VIN
(V)
VOUT
(V)
FOSC
(Hz)
C1
(uF)
L1
(uH)
C2
(uF)
R3
(kΩ)
C3
(pF)
C4
(pF)
Application 1
3.3
9
1.2M
10
4.7(TDK SLF6028)
33 (ceramic)
82
820
10
Application 2
3.3
12
1.2M
10
4.7(TDK SLF6028)
33 (ceramic)
180
680
22
Application 3
3.3
12
640K
10
10(TDK SLF6028)
33 (ceramic)
120
1200
22
Figure 1
Figure 2
V
IN
LX
VIN
NC
FREQ
COMP
FB
EN
GND
V
OUT
C1
C4
C3
C2
R1
R2
R3
L1
D1
4
3
1
2
8
7
6
5
RT9277A
2.5V to 5.5V
Chip Enable
V
IN
LX
VIN
SS
FREQ
COMP
FB
EN
GND
V
OUT
C1
C
SS
C4
C3
C2
R1
R2
R3
L1
D1
4
3
1
2
8
7
6
5
RT9277B
2.5V to 5.5V
Chip Enable
+
-
+
-
Control
and
Driver
Logic
Current
Sense
Slope
Compen-
sation
Oscillator
Summing
Comparator
Clock
Error
Amplifier
1.24V
5uA
VIN
LX
GND
EN
COMP
FB
FREQ
N
Protection
Internal
Soft-Start
V
IN
V
FB
LX



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