MB39C015 Datasheet, PDF (30/43 Pages) Cypress Semiconductor – High efficiency : 96% (Max)

MB39C015
■ Application Circuit Example 2
❐ The voltage of VREF pin is input to the reference voltage external input (VREFIN1, VREFIN2) by dividing resistors. The VOUT1
voltage is set to 2.5 V and VOUT2 voltage is set to 1.8 V.
CPU
R7
1 MΩ
3 CTL1
R1 170 kΩ
( 20 kΩ + 150 kΩ )
8 VREFIN1
R2
300 kΩ
DVDD1 ¹¹
12
DGND1 14
15
DVDD2 19
20
DGND2 16
17
AVDD 5
R8
1 MΩ
2 CTL2
AGND 4
MB39C015
R5 352 kΩ
( 22 kΩ + 330 kΩ )
23 VREFIN2
R6
300 kΩ
LX1 13
OUT1 ¹⁰
C3
4.7 μF
C4
4.7 μF
C5
0.1 μF
L1
2.2 μH
6 VREF
9 _MODE1
LX2 18
L2
2.2 μH
22 MODE2
OUT2 21
VIN
VOUT1
C1
4.7 μF
APLI1
VOUT2
C2
4.7 μF
APLI2
1 _CTLP
XPOR 24
VOUT1 = 3.01 × VREFIN1
VREFIN1 = ^R2
× VREF
R1 + R2
(VREF = 1.30 V)
VOUT1 = 3.01 ×
300 kΩ
× 1.30 V = 2.5 V
170 kΩ + 300 kΩ
VOUT12 = 3.01 ×
300 kΩ
× 1.30 V = 1.8 V
352 kΩ + 300 kΩ
Document Number: 002-08364 Rev. *A
Page 30 of 43