Text version of the page

AIC1531

USB_5V 10 µ
+ C1 F Q1 C11 si2301 V
OUT _3.3V 22 µ H D1 U2 L1 + SS12 R7 1 8 220 µ F R5 51k VSBY GND 15k 2 V U1
IN R1 27K 7 R3 1 VCC GND VOUT8 3 6 2
+ ILIM/SD + 22 R8 VOUT GND 12k 30K 4 C5 R6 VIN LBI7 C4 3 AUX GND 22 µ F 1 µ F 47 µ F C9 SW LBO6 4 5
+ C13 AIC1531 SGND CGND5 10 µ F AIC1631

Fig.21 The Step Up/Down Converter with OR Function for Dual Power System

USB_5V C4 10 µ

+

22 µ H D1 F L1 SS12 U2 U1 V 1 GND 8 2

OUT

_3.3V V

IN

R1 27K R2 1 VSBY ILIM/SD VOUT 8 7 2

+

22 7 VCC GND 3 VIN LBI 6 3 GND 4

+

VOUT C1 22 µ C2 6

+

1 µ C5 SW LBO 5 4 AUX GND 220 µ 47 µ F C3 SGND CGND 5 F AIC1531 AIC1631

Fig.22 The Step Up Converter with OR Function for Dual Power System

USB_5V + C4 10 µ V

OUT

_3.3V F U2 V 2.7~5.5V 1

IN

8 U1 1 VOUT VSBY GND 2 7 CAP6 C1 C3 10 10 µ 2 F GND 5 VCC GND 3 VIN

+

6 µ F 3 SHDN C2 1 µ F VOUT GND 4 C5 CAP4 22 µ F AUX GND 5 AIC1531 AIC1845

Fig. 23 The Step Up/Down Converter with OR Function for Dual Power System

9