Rainbow Electronics BA3257FP_HFP - Manual (Page 2)

Application Circuit
Electrical characteristics ( Unless otherwise noted; Ta=25˚C, Vcc=5V, R 1 =R 2 =5kΩ)
Parameter Symbol Min. Typ. Max. Unit Conditions
Circuit current
Line regulation 1,2
Load regulation 1,2
[3.3V output]
Output voltage
Dropout voltage
Output current
[Variable output]
Reference voltage
Dropout voltage
Output current Io1=0mA, Io2=0mA
Vcc=4.75 → 14V, Io1=5mA
Io2=5mA → 1A
Io1=50mA
Io1=1A
Io2=50mA
Io2=1A, R
1 =8.2kΩ, R 2 =5kΩ
Ib
∆ V LINE 1,2
∆ V LOAD 1,2
Vo1
∆ V D1
Io1
Vref
∆ V D2
Io2
-
-
-
3.234
-
1.0
1.225
-
1.0
3
5
5
3.300
1.1
-
1.250
1.1
-
5
15
20
3.366
1.3
-
1.275
1.3
-
mA
mV
mV
V
V
A
V
V
A
V REF
Thermal
Shutdown
Current
Limit
Current
Limit
1
2
5
4
ADJ
ADJ
GND
V
IN
V
CC
V
O2
V
OUT2=
V
REF X (1+R 1 /R 2 )+
I
ADJ X
R
1
V
O1
3.3V
3.3µF
C
IN
1µF
C
O2
1µF
C
O1
R
2
R
1
FIN
BA3257FP/HFP