RT8251
Marking Information
RT8251GQW
RT8251GSP
GE= : Product Code
RT8251GSP : Product Number
YMDNN : Date Code
RT8251
GSPYMDNN
YMDNN : Date Code
GE=YM
DNN
Typical Application Circuit
1, 2, 3,
V
15, 16
9
IN
VIN
BOOT
RT8251
4.75V to 24V
C
100nF
C
BOOT
L
IN
4.7µH
10µF x 2
V
OUT
10 to 14
SW
7
8
3.3V/5A
EN
SS
Chip Enable
D
R1
B540C
30.9k
C
5
OUT
C
SS
FB
22µF x 2
C
C
10nF
4,
R
C
R2
2.2nF
22k
10k
Exposed Pad (17)
6
GND
COMP
C
P
(Open)
Figure 1. Typical Application Circuit for WQFN-16L 3x3
1
3
2
7
V
IN
BOOT
RT8251
VIN
C
4.75V to 24V
IN
C
100nF
BOOT
10µF x 2
L
V
OUT
SW
Chip Enable
3.3V/5A
4.7µH
D
EN
SS
R1
B540C
30.9k
8
C
OUT
22µF x 2
5
6
FB
C
10nF
SS
4,
C
C
R
C
R2
10k
2.2nF
Exposed Pad(9)
22k
GND
COMP
C
P
NC
Figure 2. Typical Application Circuit for SOP-8 (Exposed Pad)
Table 1. Recommended Component Selection
V
(V)
R1 (kΩ)
182
R2 (kΩ)
10
R (kΩ)
C (nF)
C
L1 (μH)
22
C
(μF)
OUT
OUT
C
15
51
43
39
30
22
16
13
13
1
44
10
8
115
10
1.2
1.5
1.5
2.2
2.2
2.2
2.2
10
44
44
44
44
44
44
44
91
10
10
5
52.3
30.9
21.5
12.4
4.99
10
6.8
4.7
4.7
2.2
2.2
3.3
2.5
1.8
1.2
10
10
10
10
Copyright 2013 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS8251-04 February 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
