MB39C308 Datasheet, PDF (17/60 Pages) Fujitsu Component Limited. – 6ch DC/DC Converter IC for LPIA Platform VR

MB39C308
(Ta = + 25 °C, AVDD = PVDD1 to PVDD7 = 7.2 V)
Parameter
Symbol
Condition
Value
Unit
Min Typ Max
Vo4 over current limit
IOCP4
Io4,
L = 1.5 μH,fosc = 700 kHz
1.92*¹ 2.4*¹ 2.88*¹ A
FB4 input resistance RFB4 FB4 pin
⎯
750
⎯
kΩ
CH4 block ^{Soft start time}
[CH4]
FSEL4, “H” level
SS4
VFLGH4
FB4 pin,
SS1 = SS2 = AGND pin
FSEL4 pin
1.19 1.4 1.61 ms
2
⎯
⎯
V
FSEL4, “L” level
VFLGL4 FSEL4 pin
⎯
⎯
0.8
V
FSEL4 input current
IFSELH4
IFSELL4
FSEL4 pin = 3 V
FSEL4 pin = 0 V
23
30
43 μA
⎯
⎯
1
μA
CH5 output voltage
Vo5 FB5 pin
1.425 1.5 1.575 V
High-side FET
on-resistance
RONH5
LX5 pin = −100 mA,
VGS = 5 V
⎯ 65*¹ ⎯ mΩ
Low-side FET
on-resistance
RONL5
LX5 pin = 100 mA,
VGS = 5 V
⎯ 40*¹ ⎯ mΩ
PVDD5 standby
current
IPVDD5S
CTL5 pin = 0 V,
PVDD5 pin = 12.6 V
⎯
⎯
15 μA
CH5 block
[CH5]
CH5 efficiency
ηL5
0.05 × Io (Max) < Io <
0.3 × Io (Max)
ηT5
0.3 × Io (Max) < Io <
0.6 × Io (Max)
82*³
⎯
⎯
%
85*³
⎯
⎯
%
ηF5 0.6 × Io (Max) < Io < Io (Max) 85*³ ⎯
⎯
%
Vo5 output over
voltage threshold
VOVP5 FB5 pin
1.77*¹ 1.8*¹ 1.83*¹ V
Vo5 over current limit
IOCP5
Io5,
L = 1.5 μH
2.8*¹ 3.5*¹ 4.2*¹ A
FB5 input resistance RFB5 FB5 pin
⎯ 250 ⎯ kΩ
Soft start time
SS5
FB5 pin,
SS1 = SS2 = AGND pin
1.19 1.4 1.61 ms
CH6 output voltage
DVSEL6 = “H” Level,
FB6 pin
Vo6
DVSEL6 = “L” Level,
FB6 pin
1.045 1.1 1.155 V
0.9975 1.05 1.1025 V
CH6 block High-side FET
[CH6]
on-resistance
RONH6
LX6 pin = −100 mA,
VGS = 5 V
⎯ 61*¹ ⎯ mΩ
Low-side FET
on-resistance
RONL6
LX6 pin = 100 mA,
VGS = 5 V
⎯ 35*¹ ⎯ mΩ
PVDD6 standby
current
IPVDD6S
CTL6 pin = 0 V,
PVDD6 pin = 12.6 V
⎯
⎯
15 μA
(Continued)
DS04-27261-6E
17