BD95242MUV_10 Datasheet, PDF (3/21 Pages) Rohm – 2ch Switching Regulator for Desktop PC

Technical Note
●Electrical characteristics – Continued
(unless otherwise noted, Ta=25℃ VIN=12V, CTL=5V, EN1=EN2=5V, REF1=2.5V, REF2=1.65V, FS1=FS2=0.582V)
Parameter
[H³REG block]
Symbol
Standard Value
MIN.
TYP.
MAX.
Unit
Conditions
On Time 1
TON1
0.810 0.960 1.110
μs REF=2.5V
On Time 2
TON2
0.520 0.670 0.820
μs REF=1.65V
Maximum On Time
TONMAX 3.5
7
14
μs
Minimum Off Time
TOFFMIN
-
0.2
0.4
μs
FS1, FS2 bias current
IFS
-10
0
10
μA
[FET driver block]
HG higher side ON resistor
HGHON
-
3.0
6.0
Ω
HG lower side ON resistor
HGLON
-
2.0
4.0
Ω
LG higher side ON resistor
LGHON
-
2.0
4.0
Ω
LG lower side ON resistor
LGLON
-
0.5
1.0
Ω
[Over Voltage Protection block]
Latch Type OVP Threshold voltage VLOVP
REF×2 REF×2 REF×2
×1.15 ×1.175 ×1.20
V
Latch Type OVP delay time
TLOVP
50
150
300
μs
[Short circuit protection block]
SCP Threshold voltage
VSCP
REF×2 REF×2 REF×2
×0.66 ×0.7 ×0.74
V
Delay time
TSCP
0.5
1
2
ms
[Current limit protection block]
Maximum offset voltage
dVSMAX
50
65
80
mV
Is+1 bias current
IISP1
-
2.5
10
μA
Is+2 bias current
IISP2
-
2.5
10
μA
[Power good block]
Power good low threshold
VPGTHL
REF×2
×0.87
REF×2
×0.90
REF×2
×0.93
V
Power good high threshold
VPGTHH
REF×2
×1.07
REF×2
×1.10
REF×2
×1.13
V
Power good low voltage
VPGL
-
0.1
0.2
V IPGOOD=1mA
Power good leakage current
ILEAKPG
-2
0
2
μA VPGOOD=5V
[Soft Start block]
Charge current
ISS
1.8
2.5
3.2
μA
Standby voltage
VSS_STB
-
-
50
mV
SLLM mode control block]
MCTL terminal voltage 1
MCTL terminal voltage 2
MCTL terminal voltage 3
VCONT
-0.3
VQLLM
1.5
VSLLM
4.5
-
0.3
V Continuous mode
-
3.0
V
QL²M mode
(Maximum LG off time : 50μs)
-
REG1
+0.3
V
SL²M mode
(Maximum LG off time : ∞)
MCTL float level
VMCTL
1.5
-
3.0
V
●Output condition table
CTL
Low
Low
Low
Low
High
High
High
High
Input
EN1
Low
Low
High
High
Low
Low
High
High
EN2
Low
High
Low
High
Low
High
Low
High
REG1(5V)
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Output
REG2(3.3V)
DC/DC1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
ON
ON
ON
DC/DC2
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
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2010.03 - Rev.C