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

BD9540EFV
Technical Note
●Operating Conditions (Ta=25℃)
Parameter
Symbol
Min.
Max.
Unit
Input voltage
VIN
7.5
20
V
BOOT voltage
BOOT1, BOOT2
4.5
25
V
SW Voltage
SW1, SW2
-0.7
20
V
BOOT-SW voltage
BOOT1-SW1, BOOT2-SW2
4.5
5.5
V
Logic Input Voltage 1
EN1, EN2
0
20
V
Logic Input Voltage 2
CTL1, CTL2
0
5.5
V
Output Voltage
VOUT1, VOUT2
0.7
5.5
V
MIN ON Time
tonmin
-
100
ns
*This product should not be used in a radioactive environment.
*The range of the VOUT is limited by the voltage between VIN and VOUT.
●Electrical characteristics
(Unless otherwise noted, Ta=25℃ VCC=5V, VIN=12V, VEN1=VEN2=3V, Vout1=1.5V, Vout2=1.05V)
Parameter
Symbol
Min.
Limit
Typ.
Max.
Unit
Condition
[General]
VIN Bias Current
IIN
-
1.6
2.5
mA
VIN Standby Current
IIN_stb
-
0
10
μA VEN1=VEN2=0V
EN Low Voltage 1,2
VEN_low1,2
GND
-
0.3
V
EN High Voltage 1,2
VEN_high1,2
2.2
-
20
V
EN Bias Current 1,2
IEN1,2
-
1.5
5.0
μA VEN1=VEN2=3V
[5V Linear Regulator]
5VReg Standby Voltage
5Vreg_stb
-
-
0.1
V VEN1=VEN2=0V
5VReg Output Voltage
5VReg
4.8
5.0
5.2
V
VIN=7.5V to 20V
Ireg=0mA to 10mA
Maximum Current
IReg
50
-
-
mA
[Under-Voltage Lock-Out]
5VReg Threshold Voltage
5Vreg_UVLO
3.75
4.20
4.65
V 5VReg:Sweep up
5VReg Hysteresis Voltage
d5Vreg_UVLO 100
160
220
mV 5VReg:Sweep down
[OVP Block]
FB Threshold Voltage 1
FB_OVP1
0.92
1.02
1.12
V
FB Threshold Voltage 2
FB_OVP2
0.80
0.90
1.00
V
OVP delay time
[H³Reg^TM Control Block]
tOVP
-
1.7
-
μs
ON Time1
ton1
290
390
490
ns
MIN OFF Time 1
toffmin1
200
380
-
ns
ON Time 2
ton2
110
210
310
ns
MIN OFF Time 2
toffmin2
200
380
-
ns
[FET Block]
HG High side ON Resistance 1,2 RHGhon1,2
-
5.5
11
Ω
HG Low side ON Resistance 1,2 RHGlon1,2
-
2.5
5
Ω
LG High side ON Resistance 1,2 RLGhon1,2
-
4
8
Ω
LG Low side ON Resistance 1,2 RLGlon1,2
-
2
4
Ω
[Over Current Protection Block]
Current Limit
Threshold Voltage 1,2
Vilim1,2
80
100
120
mV RILIM=100kΩ
[Output Voltage Detection Block]
FB1 threshold(REF1) Voltage1
FB1-1
0.769
0.781
0.793
V CTL1=0V, CTL2=0V
FB1 threshold(REF1) Voltage2
FB1-2
0.802
0.814
0.826
V CTL1=5V, CTL2=0V
FB1 threshold(REF1) Voltage3
FB1-3
0.839
0.851
0.863
V CTL1=0V, CTL2=5V
FB1 threshold(REF1) Voltage4
FB1-4
0.738
0.750
0.762
V CTL1=5V, CTL2=5V
FB2 threshold(REF2) Voltage
FB2
0.738
0.750
0.762
V
CTL Low Voltage 1,2
VCTL_low1,2 GND
-
0.5
V
CTL High Voltage 1,2
VCTL_high1,2 VCC-0.5
-
VCC
V
FB1/2 Input Current
IFB1,2
-1
-
1
μA
VOUT Discharge Current
IVOUT1,2
5
10
-
mA VOUT=1V, EN=0V
[SCP Block]
Threshold Voltage 1,2
Vthscp1,2
REF1,2× REF1,2× REF1,2×
0.60
0.70
0.80
V
SCP delay time
tSVP
-
28
-
μs
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2009.04 - Rev.B