PJ3842B
High Performance Current Mode Controller
3-15
2002/01.ver.A
PJ3842B
Typ
Characteristic
Symbol
Min
Max
Unit
ERROR AMPLIFIER SECTION
Voltage Feedback Input (Vo=2.5V)
Input Bias Current (V
FB
=5.0V)
Open-Loop Voltage Gain (Vo=2.0V to 4.0V)
Unity Gain Bandwidth (T
J
=25
℃
)
Power Supply Rejection Radio (V
CC
=12V to 25V)
Output Current
Sink (Vo=1.1V, V
FB
=2.7V)
Source ( Vo=5.0V, V
FB
=2.3V)
Output Voltage Swing
High State (R
L
=15K to ground, V
FB
=2.3V)
Low State (R
L
=15K to Vref, V
FB
=2.7V)
CURRENT SENSE SECTION
Current Sense Input Voltage Gain (Note 4&5)
Maximum Current Sense Input Threshold(Note 4)
Power Supply Rejection Radio
V
CC
=12V to 25V,Note 4
Input Bias Current
Propagation Delay(Current Sense Input to Output)
OUTPUT SECTION
Output Voltage
Low State (Isink=20mA)
(Isink=200mA)
High State (Isource=20mA)
(Isource=200mA)
Output Voltage with UVLO Activated
V
CC
=6.0V,Isink=1.0mA
Output Voltage Rise Time (C
L
=1.0nF,T
J
=25
℃
)
Output Voltage Fall Time (C
L
=1.0nF,T
J
=25
℃
)
UNDERVOLTAGE LOCKOUT SECTION
Start-Up Threshold
PJ3842B
Minimum Operating Voltage After Turn-On
PJ3842B
PWM SECTION
Duty Cycle
Maximum
Minimum
TOTAL DEVICE
Power Supply Current
Start-Up, V
CC
= 14V
Operating (Note 2)
Power Supply Zener Voltage (I
CC
=25mA)
V
FB
I
IB
A
VOL
BW
PSRR
I
sink
I
Source
V
OH
V
OL
Av
V
th
P
SRR
2.42
-
65
0.7
60
2.0
-0.5
5.0
-
2.85
0.9
-
2.5
-0.1
90
1.0
70
12
-1.0
6.2
0.8
3.0
1.0
70
2.58
-2.0
-
-
-
-
-
-
1.1
3.15
1.1
-
V
μΑ
dB
MHz
dB
mA
V
V/V
V
dB
I
IB
-
-
-
-
-2.0
150
0.1
1.6
13.5
13.4
0.1
-10
300
0.4
2.2
-
-
1.1
μΑ
ns
V
t
PLH(IN/OUT)
V
OL
V
OH
13
12
-
V
OL
(UVLO)
V
tr
tf
Vth
-
-
50
50
16
10
96
-
0.25
12
36
150
150
17.5
11.5
-
0
0.5
17
-
ns
ns
V
14.5
8.5
94
-
-
-
30
V
CC(min)
V
DCmax
DCmin
I
CC
%
mA
Vz
V
ELECTRICAL CHARACTERISTICS
(V
CC
=15V(Note 2) , R
T
=10K C
T
=3.3nF T
A
=T
low
to T
high
( Note 3) unless otherwise