BD95242MUV Datasheet, PDF (2/21 Pages) Rohm – 2ch Switching Regurators for Desktop PC

Technical Note
●Operating Conditions (Ta=25℃)
Parameter
Symbol
MIN.
MAX.
Unit
VIN
7
25
V
EXTVCC
4.5
5.5
V
CTL
-0.3
25
V
EN1, EN2
-0.3
5.5
V
BOOT1, BOOT2
4.5
30
V
Terminal voltage
BOOT1-SW1, BOOT2-SW2, HG1-SW1, HG2-SW2
-0.3
5.5
V
PGOOD1, PGOOD2
-0.3
5.5
V
FS1, FS2
0.09
1.25
V
REF1, REF2
1
2.75
V
Is+1, Is+ 2, FB1, FB2
1.9
5.6
V
MCTL
-0.3
REG1+0.3
V
*This product should not be used in a radioactive environment.
●Electrical characteristics
(unless otherwise noted, Ta=25℃ VIN=12V, CTL=5V, EN1=EN2=5V, REF1=2.5V, REF2=1.65V, FS1=FS2=0.582V)
Parameter
Symbol
Standard Value
MIN.
TYP.
MAX.
Unit
Conditions
VIN standby current
ISTB
70
150
250
μA CTL=5V, EN1=EN2=0V
VIN bias current
IIN
0
45
130
μA EXTVCC=5V
Shut down mode current
ISHD
-10
0
10
μA CTL=0V
CTL Low voltage
VCTLL
-0.3
-
0.8
V
CTL High voltage
VCTLH
2.3
-
25
V
CTL bias current
ICTL
-
1
3
μA VCTL=5V
EN Low voltage
VENL
-0.3
-
0.8
V
EN High voltage
VENH
2.3
-
5.5
V
EN bias current
IEN
-
1
3
μA VEN=3V
[5V linear regulator]
REG1 output voltage
VREG1
4.90
5.00
5.10
V IREG1=1mA
Maximum current
IREG1
200
-
-
mA IREG2=0mA
Line Regulation
REG1I
-
90
180
mV VIN=7.5 to 25V
Load Regulation
REG1L
-
30
50
mV IREG1=0 to 30mA
[3.3V linear regulator]
REG2 output voltage
VREG2
3.27
3.30
3.33
V IREG2=1mA
Maximum current
IREG2
100
-
-
mA
Line regulation
REG2I
-
-
20
mV VIN=7.5 to 25V
Load regulation
REG2L
-
-
30
mV IREG2=0 to 100mA
[5V switch block]
EXTVCC input threshold
voltage
VCC_UVLO
4.2
4.4
4.6
V EXTVCC: Sweep up
EXTVCC input delay time
TVCC
2
4
8
ms
Switch Resistance
RVCC
1.0
2.0
Ω
[Under voltage lock out block for DC/DC]
REG1 threshold voltage
REG1_UVLO 4.0
4.2
4.4
V REG1: Sweep up
REG2 threshold voltage
REG2_UVLO 2.45
2.65
2.85
V REG2: Sweep up
Hysteresis voltage
dV_UVLO
50
100
200
mV REG1, REG2: Sweep down
[Error amplifier block]
Feed back voltage 1
VFB1
REF1×2
-25m
REF1×2
REF1×2
+25m
V
FB1 bias current
IFB1
20
45
90
μA FB1=5V
Output discharge resistance 1 RDISOUT1
0.5
1
3
kΩ
Feed back voltage 2
VFB2
REF2×2
-25m
REF2×2
REF2×2
+25m
V
FB2 bias current
IFB2
10
30
60
μA FB2=3.3V
Output discharge resistance 2 RDISOUT2
0.5
1
3
kΩ
REF1, REF2 bias current IREF1, IREF2 -10
-
10
μA
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2009.04 - Rev.B