Application circuit electrical characteristics – Rainbow Electronics BA3257FP_HFP User Manual
Page 2
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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
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