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RT8271 Datasheet(PDF) 2 Page - Richtek Technology Corporation

Part # RT8271
Description  2A, 24V, 1.2MHz Step-Down Converter
PDF  15 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8271 Datasheet(HTML) 2 Page - Richtek Technology Corporation

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RT8271
2
DS8271-02 March 2011
www.richtek.com
VOUT (V)
R1 (k
Ω)
R2 (k
Ω)
RC (kΩ)
CC (nF)
L (
μH)
COUT (μF)
15
154
10
68
0.56
22
22
10
100
10
49.9
0.82
15
22
8
76.8
10
49.9
1
10
22
5
44.2
10
33
1.2
6.8
22
3.3
25.5
10
22
1.5
4.7
22
2.5
16.9
10
15
1.5
4.7
22
1.8
9.53
10
12
1.5
2.2
22
1.2
3
10
12
1.5
2.2
22
Table 1. Recommended Component Selection
Function Block Diagram
Typical Application Circuit
VIN
EN
GND
BOOT
FB
SW
L1
4.7µH
CBOOT
10nF
COUT
22µF/6.3V
R1
16.9k
R2
10k
VOUT
2.5V
CIN
10µF/25V
Chip Enable
VIN
4.75V to 24V
RT8271
D1
B230A
SS
CSS
10nF
COMP
CC
1.5nF
RC
15k
CP
NC
VA
+
-
+
-
+
-
UV
Comparator
Oscillator
1.2MHz/440kHz
Foldback
Control
0.5V
Internal
Regulator
+
-
1V
1µA
Shutdown
Comparator
Current Sense
Amplifier
BOOT
VIN
GND
SW
FB
EN
COMP
3V
10k
VA VCC
VCC
Slope Comp
Current
Comparator
SS
10µA
VCC
+
-
EA
0.92V
Gm = 920µA/V
+
Logic



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