BD9540EFV Datasheet, PDF (5/18 Pages) Rohm – 2ch Switching Regulators for Desktop PC

BD9540EFV
●Reference Data
Technical Note
VOUT2
50[mV/div]
SW1
10[V/div]
SW2
10[V/div]
IOUT2
2[A/div]
VOUT2
50[mV/div]
SW1
10[V/div]
SW2
10[V/div]
(2μs/div)
Fig.1 Transient Respnse
(VIN=12V VOUT2=1.05V)
IOUT2
2[A/div]
VOUT1
50[mV/div]
(2μs/div)
Fig.2 Transient Respnse
(VIN=12V VOUT2=1.05V)
SW1
10[V/div]
SW2
10[V/div]
IOUT2
2[A/div]
(2μs/div)
Fig.3 Transient Respnse
(VIN=12V VOUT1=3.3V)
VOUT1
50[mV/div]
SW1
10[V/div]
SW2
10[V/div]
IOUT2
2[A/div]
EN
50[V/div]
VOUT
0.5[V/div]
SW
10[V/div]
IL
2[A/div]
1msec(typ)
EN
50[V/div]
VOUT
0.5[V/div]
SW
10[V/div]
IL
2[A/div]
1msec(typ)
(2μs/div)
Fig.4 Transient Respnse
(VIN=12V VOUT1=3.3V)
HG, LG
20[V/div]
VOUT
1[V/div]
28μsec(typ)
Fig.5 VOUT wake up
(Io=0A)
130
RILIM=100kΩ
120
110
100
Fig.6 VOUT wake up
(Io=4A)
100
Vo=1.8V
80
Vo=1.2V
60
40
IL
5[A/div]
Fig.7 OCP and SCP
2.5
2
1.5
1
0.5
0
-20
VIN=12V
VCC=VREG5V
EN1=EN2=3V
0 20 40 60
Ta [℃]
Fig.10 Ta-IIN
80 100
90
80
-20
0 20 40 60
Ta [℃]
Fig.8 Ta-VILIM
80 100
10
20
0
0.01
2.5
VIN=12V
VMOSFET:MP6K61
0.1
1
10
IOUT [A]
Fig.9 IOUT-Efficiency
8
2
6
1.5
4
VIN=12V
2
VCC=VREG5V
EN1=EN2=0V
0
-20
0
20 40 60 80 100
Ta [℃]
Fig.11 Ta-IIN_STB
1
0.5
0
0
VCC=VREG5V
EN1=EN2=3V
5
10
15
20
VIN [V]
Fig.12 VIN-IIN
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2009.04 - Rev.B