DS8817A Datasheet, PDF (8/21 Pages) Richtek Technology Corporation – Dual-Phase PWM Controller with PWM-VID Reference

RT8817A
Typical Application Circuit
V_STANDBY
1
V_PVCC
21 _PVCC
BOOT1 ¹
0 ^{0.1µF VIN}
2.2
V_IN
R_TON
500k
2.2µF
RT8817A
UGATE1 ²
0
9 _TON
PHASE1 ²⁴
10µF x 2
0.36µH/1.05m 
1µF
Optional
PGOOD
PSI
VID
Enable
C_TON
100k
16 _PGOOD
4 _PSI
5 _VID
3 _EN
LGATE1 ²³
OCSET/SS ¹²
BOOT2 ¹⁸
C_SS
NC
R_OCSET
10k
V_IN
0 ^0.1µF
NC
NC
10µF x 2
8 _VREF
UGATE2 ¹⁷
0
R_REF1 ^20k
0.1µF
RGND _20k
6 _REFADJ
PHASE2 ¹⁹
LGATE2 ²⁰
0.36µH/1.05m 
NC
C_REFADJ RREFADJ
NC
R_BOOT ^2k
2.7nF
RGND ¹⁰
R_STANDBY
5.1k
0
RGND
1R8^Rk^EF2
C_REFIN
NC
RGND
RGND
7 _REFIN
VSNS ¹¹
GND
25 (Exposed pad)
NC
RGND
470µF/50V
V_OUT
22µF x 15
330µF/2V x 4
470µF/50V
10 10
V_{GND_SNS}
V_{OUT_SNS}
Figure 1. 2 Active Phase Configuration
V_STANDBY
2.2
V_IN
1
V_PVCC
R_TON
500k
1µF
Optional
PGOOD
PSI
VID
21 _PVCC
BOOT1 ¹
2.2µF
RT8817A
UGATE1 ²
9 _TON
C_TON
PHASE1 ²⁴
LGATE1 ²³
100k
16 _PGOOD
4 _PSI
5 _VID
OCSET/SS ¹²
V_IN
0 ^0.1µF
0
C_{SS ROCSET}
NC ^10k
Enable
3 _EN
8 _VREF
RGND ¹⁰
VSNS ¹¹
R_REF1 ^20k
R_BOOT ^2k
0.1µF
RGND _{20k 6 REFADJ}
C_REFADJ R_REFADJ
2.7nF
BOOT2 ¹⁸
UGATE2 ¹⁷
PHASE2 ¹⁹
RGND
7 _REFIN
LGATE2 ²⁰
R_STANDBY
5.1k
0
R_REF2
18k
RGND
C_REFIN
NC
RGND
GND
25 (Exposed pad)
NC
Floating
RGND
10µF x 2
470µF/50V
0.36µH/1.05m 
NC
V_OUT
22µF x 15
NC
330µF/2V x 4
10 10
V_{GND_SNS}
V_{OUT_SNS}
Figure 2. 1 Active Phase Configuration
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is a registered trademark of Richtek Technology Corporation.
DS8817A-00 September 2016