MB39C007 Datasheet, PDF (36/52 Pages) Fujitsu Component Limited. – 2 ch DC/DC Converter IC Built-in Switching FET & voltage detection function, PFM/PWM Synchronous Rectification, and Down Conversion Support

MB39C007
• 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
MB39C0007
R7
1 MΩ
3 CTL1
R1 163 kΩ
( 13 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
R5 343 kΩ
( 13 kΩ + 330 kΩ )
23 VREFIN2
R6
300 kΩ
AGND 4
LX1 13
OUT1 ¹⁰
C3
4.7 μF
C4
4.7 μF
C5
0.1 μF
L1
2.2 μH
6 VREF
L = PFM/PWM
OPEN = PWM
9 _MODE1
22 MODE2
7 _VDET
LX2 18
L2
2.2 μH
OUT2 21
VIN
VOUT1
C1
4.7 μF
APLI1
VOUT2
C2
4.7 μF
APLI2
1 _CTLP
XPOR 24
VOUT1 = 2.97 × VREFIN1
VREFIN1 = ^R2
× VREF
R1 + R2
(VREF = 1.30 V)
VOUT1 = 2.97 ×
300 kΩ
× 1.30 V = 2.5 V
163 kΩ + 300 kΩ
VOUT2 = 2.97 ×
300 kΩ
× 1.30 V = 1.8 V
343 kΩ + 300 kΩ
36
DS04-27246-2E