rt8297a Richtek Technology Corporation, rt8297a Datasheet - Page 2

• Manufacturer Part Number: rt8297a
• Description: 1.5a, 17v, 340/800khz Synchronous Step-down Converter
• Manufacturer: Richtek Technology Corporation

RT8297A/B
Typical Application Circuit
www.richtek.com
2
4V to 17V
4V to 17V
PGOOD
PGOOD
V
V
IN
IN
Chip Enable
Chip Enable
7, 8, 9 (Exposed Pad)
7, 8, 9 (Exposed Pad)
RT8297A
RT8297B
V
V
OUT
OUT
Table 1. Recommended Component Selection
1.2
2.5
3.3
1.2
2.5
3.3
5
5
C
10µF
C
10µF
(V)
(V)
IN
IN
L (μH)
L (μH)
2
6
4
2
6
4
4.7
3.6
4.7
6.8
10
15
22
10
VIN
PGOOD
EN
GND
VIN
PGOOD
EN
GND
RT8297A
RT8297B
R1 (kΩ)
R1 (kΩ)
110
110
110
120
47
47
47
62
BOOT
BOOT
SW
SW
FB
FB
3
1
5
3
1
5
R2 (kΩ)
R2 (kΩ)
220
51
36
22
91
22
15
12
36k
15k
R2
R2
10nF
10nF
C
C
BOOT
BOOT
110k
C
C
47k
R1
R1
6.8µH
15µH
OUT
OUT
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
L
L
(μF)
(μF)
C
22µF x 2
C
22µF x 2
DS8297A/B-00 March 2011
OUT
OUT
V
3.3V
1.5A
V
3.3V
1.5A
OUT
OUT