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RT7280 Datasheet(PDF) 11 Page - Richtek Technology Corporation

Part # RT7280
Description  2A, 18V, 700kHz ACOTTM Synchronous Step-Down Converter
PDF  22 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT7280 Datasheet(HTML) 11 Page - Richtek Technology Corporation

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RT7274/79/80/81
11
DS7274/79/80/81-01 February 2013
www.richtek.com
©
Copyright 2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
For TSSOP-14 (Exposed Pad) Package
For SOP-8 (Exposed Pad) Package
Typical Application Circuit
RT7279/80
PVCC
PGND
VIN
VIN
10µF x 2
C1
0.1µF
C2
SS
3.9nF
C5
1µF
C4
VOUT
1.05V/2A
GND
EN
Input Signal
PGOOD
Output Signal
R3 100k
PVCC
BOOT
L1
2µH
0.1µF
C6
22µF x 2
C7
SW
22k
FB
8.25k
R1
R2
C3
VOUT
VINR
13
14
6
7
3
4
8, 9, 15 (Exposed Pad)
1
5
2
12
10, 11
Table 1. Suggested Component Values
VOUT (V)
R1 (k
Ω)
R2 (k
Ω)
C3 (pF)
L1 (
μH)
C7 (
μF)
1
6.81
22.1
--
2
22 to 68
1.05
8.25
22.1
--
2
22 to 68
1.2
12.7
22.1
--
2
22 to 68
1.8
30.1
22.1
5 to 22
3.3
22 to 68
2.5
49.9
22.1
5 to 22
3.3
22 to 68
3.3
73.2
22.1
5 to 22
3.3
22 to 68
5
124
22.1
5 to 22
4.7
22 to 68
7
180
22.1
5 to 22
4.7
22 to 68
EN
RT7274/81
PVCC
FB
GND
VIN
VIN
10µF x 2
C1
0.1µF
C2
BOOT
L1
2µH
0.1µF
C6
22µF x 2
C7
SW
SS
3.9nF
C5
1µF
C4
VOUT
1.05V/2A
8.25k
R1
22.1k
R2
C3
VPVCC
2
3
4
5, 9 (Exposed Pad)
6
7
8
1
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