UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
THERMAL DATA
Symbol
R
th j-amb
Description
Thermal Resistance Junction-ambient.
max.
Minidip
100
SO8
150
Unit
°C/W
ELECTRICAL CHARACTERISTICS
( [note 1] Unless otherwise stated, these specifications apply for
-25 < T
amb
< 85°C for UC284XB; 0 < T
amb
< 70°C for UC384XB; V
i
= 15V (note 5); R
T
= 10K; C
T
= 3.3nF)
Symbol
Parameter
Test Conditions
UC284XB
UC384XB
Unit
Min. Typ. Max. Min. Typ. Max.
4.95 5.00 5.05 4.90 5.00 5.10
2
3
0.2
4.9
50
5
-30
49
T
j
= 25°C
48
T
A
= T
low
to T
high
225
T
J
= 25°C (R
T
= 6.2k, C
T
= 1nF)
–
–
–
7.8
7.5
T
A
= T
low
to T
high
(peak to peak)
25
-30
49
48
225
–
–
–
7.8
7.6
5.1
4.82
50
5
25
20
25
2
3
0.2
5.18
20
25
V
mV
mV
mV/°C
V
µV
mV
mA
KHz
KHz
KHz
%
%
V
mA
mA
V
µA
dB
MHz
dB
mA
mA
V
1.1
V
REFERENCE SECTION
V
REF
Output Voltage
∆V
REF
∆V
REF
Line Regulation
Load Regulation
T
j
= 25°C I
o
= 1mA
12V
≤
V
i
≤
25V
1
≤
I
o
≤
20mA
(Note 2)
Line, Load, Temperature
10Hz
≤
f
≤
10KHz T
j
= 25°C
(note 2)
T
amb
=
(note 2)
125°C,
1000Hrs
∆V
REF
/∆T Temperature Stability
Total Output Variation
e
N
Output Noise Voltage
Long Term Stability
I
SC
Output Short Circuit
-100 -180
52
–
250
0.2
1
1.6
8.3
–
55
56
275
1
–
–
8.8
8.8
-100 -180
52
–
250
0.2
0.5
1.6
8.3
–
55
56
275
1
–
–
8.8
8.8
OSCILLATOR SECTION
f
OSC
Frequency
∆f
OSC
/∆V
∆f
OSC
/∆T
V
OSC
I
dischg
Frequency Change with Volt. V
CC
= 12V to 25V
Frequency Change with Temp.
Oscillator Voltage Swing
Discharge Current (V
OSC
=2V) T
J
= 25°C
T
A
= T
low
to T
high
V
PIN1
= 2.5V
V
FB
= 5V
2V
≤
V
o
≤
4V
T
J
= 25°C
12V
≤
V
i
≤
25V
V
PIN2
= 2.7V V
PIN1
= 1.1V
V
PIN2
= 2.3V V
PIN1
= 5V
V
PIN2
= 2.3V;
R
L
= 15KΩ to Ground
V
PIN2
= 2.7V;
R
L
= 15KΩ to Pin 8
(note 3 & 4)
V
PIN1
= 5V (note 3)
12
≤
V
i
≤
25V (note 3)
ERROR AMP SECTION
V
2
Input Voltage
I
b
BW
PSRR
I
o
I
o
Input Bias Current
A
VOL
Unity Gain Bandwidth
Power Supply Rejec. Ratio
Output Sink Current
Output Source Current
V
OUT
High
V
OUT
Low
CURRENT SENSE SECTION
G
V
Gain
V
3
SVR
I
b
Maximum Input Signal
Supply Voltage Rejection
Input Bias Current
Delay to Output
2.45 2.50 2.55 2.42 2.50 2.58
-0.1
65
0.7
60
2
-0.5
5
90
1
70
12
-1
6.2
0.8
1.1
-1
65
0.7
60
2
-0.5
5
-0.1
90
1
70
12
-1
6.2
0.8
-2
2.85
0.9
3
1
70
-2
150
3.15 2.85
1.1
-10
300
0.9
3
1
70
-2
150
3.15
1.1
-10
300
V/V
V
dB
µA
ns
3/15
STMICROELECTRONICS [ STMICROELECTRONICS ]
