BD9853AFV Datasheet, PDF (3/17 Pages) Rohm – Single/Dual-output High-frequency Step-down Switching Regulato (Controller type)

BD9853AFV
Technical Note
●Electrical Characteristics (Unless otherwise specified, Ta=25℃,Vcc=12V,fosc=1000kHz,STB=3V)
Parameter
Limits
Symbol
Unit
Min. Typ. Max.
Conditions
【FET Driver】
RonP
1.6
3.2
4.8
On Resistance (OUT1H)
RonN 1.7
3.4
5.1
Ω OUT=Hi
Ω OUT=Lo
RonP
1.6
3.2
4.8
On Resistance (OUT1L)
RonN 1.7
3.4
5.1
Ω OUT=Hi
Ω OUT=Lo
RonP
1.6
3.2
4.5
On Resistance (OUT2H)
RonN 1.7
3.4
5.1
Ω OUT=Hi
Ω OUT=Lo
RonP
1.6
3.2
4.8
On Resistance (OUT2L)
RonN 1.7
3.4
5.1
Ω OUT=Hi
Ω OUT=Lo
Dead Time(Turn ON)
tdtON 30
70
120
ns *OUTH,L H→L,OUTH=2200pF,OUTL=1000pF
Dead Time(Turn OFF)
tdtOFF 25
60
115
ns *OUTH,L H→L,OUTH=2200pF,OUTL=1000pF
【Control Block】
Threshold Voltage
Vstb
0.6
1.5
2.4
V
Sink Current
Istb
6
15
30
μA
【Soft Start Block】
Soft Start Start-yo Voltage Vstasoft 0.2
0.3
0.4
V Output OFF when Vscp/SOFT＜Vstass
Standby Voltage
Vstsoft －
－
40
mV SCP/SOFT Voltage
Source Current
Isosoft -3.2 -2.3 -1.4
μA Vscp/SOFT=0.6V
【Short Circuit Protection (SCP)】
Timer Start Voltage
Vtime 0.50 0.56 0.62
V INV Voltage
Threshold Voltage
Vthscp 2.2
2.3
2.4
V SCP/SOFT Voltage
Standby Voltage
Vstscp 1.21 1.35 1.49
V SCP/SOFT Voltage (When soft start ends)
Source Current
Isoscp -3.2 -2.3 -1.4
μA SCP/SOFT=1.8V
【Under Voltage Lockout (UVLO)】
Threshold Voltage
Vuvlo 4.0 4.15 4.30
V Vcc sweep down
Hysteresis Voltage
DVuvlo 0.05 0.1 0.15
V
* This product is not designed for the protection against radioactive rays.
* Measurement of dead time
Turn ON
OUTH
OUTL
2.5V
VCC-2.5V
tdtON
Turn OFF
VCC-2.5V
OUTH
OUTL
2.5V
tdtOFF
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3/16
2009.05 - Rev.A