P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
UC184xA/284xA/384xA
C U R R E N T M O D E P W M C O N T R O L L E R
P R O D U C T I O N D A T A S H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for UC384xA with 0°C ≤ TA ≤ 70°C, UC284xA with -40°C ≤ TA ≤ 85°C,
UC184xA with -55°C ≤ TA ≤ 125°C; VCC=15V; RT=10K; CT=3.3nF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal
to the ambient temperature.)
UC184xA/284xA
Min. Typ. Max. Min. Typ. Max.
UC384xA
Parameter
Symbol
Test Conditions
Units
Reference Section
Output Voltage
VREF
TJ = 25°C, IL = 1mA
4.95 5.00 5.05 4.90 5.00 5.10
V
Line Regulation
12 ≤ VIN ≤ 25V
1 ≤ IO ≤ 20mA
6
6
20
25
6
6
20
25
mV
mV
Load Regulation
0.2 0.4
5.1 4.82
0.2 0.4 mV/°C
Temperature Stability (Note 2 & 7)
Total Output Variation
Output Noise Voltage (Note 2)
Long Term Stability (Note 2)
Output Short Circuit Current
Oscillator Section
4.9
5.18
V
Over Line, Load, and Temperature
10Hz ≤ f ≤ 10kHz, TJ = 25°C
TA = 125°C, t = 1000hrs
50
5
50
5
µV
mV
mA
VN
ISC
25
25
-30 -100 -180 -30 -100 -180
Initial Accuracy (Note 6)
Voltage Stability
TJ = 25°C
12 ≤ VCC ≤ 25V
47
52
0.2
5
57
1
47
52
0.2
5
57
1
kHz
%
Temperature Stability (Note 2)
Amplitude (Note 2)
Discharge Current
TMIN ≤ TA ≤ TMAX
%
V
mA
mA
1.7
1.7
7.8 8.3 8.8 7.8 8.3 8.8
7.5 8.8 7.6 8.8
TJ = 25°C, VPIN 4 = 2V
VPIN 4 = 2V, TMIN ≤ TA ≤ TMAX
Error Amp Section
Input Voltage
Input Bias Current
VPIN 1 = 2.5V
2.45 2.50 2.55 2.42 2.50 2.58
V
µA
dB
MHz
dB
mA
mA
V
IB
-0.3
90
1
-1
-0.3
90
1
-2
Open Loop Gain
AVOL
2 ≤ VO ≤ 4V
65
0.7
60
2
65
0.7
60
2
Unity Gain Bandwidth (Note 2)
Power Supply Rejection Ratio (Note 3)
Output Sink Current
Output Source Current
Output Voltage High Level
Output Voltage Low Level
Current Sense Section
UGBW Tj = 25°C
PSRR
IOL
IOH
12 ≤ VCC ≤ 25V
70
6
70
6
VPIN 2 = 2.7V, VPIN 1 = 1.1V
VPIN 2 = 2.3V, VPIN 1 = 5V
-0.5 -0.8
-0.5 -0.8
5
6
5
6
VOH
VOL
VPIN 2 = 2.3V, RL = 15K to ground
VPIN 2 = 2.7V, RL = 15K to VREF
0.7 1.1
0.7 1.1
V
Gain (Note 3 & 4)
AVOL
2.85
0.9
3
1
70
-2
3.15 2.85
1.1 0.9
3
1
70
-2
3.15
1.1
V/V
V
dB
µA
ns
Maximum Input Signal (Note 3)
Power Supply Rejection Ratio (Note 3)
Input Bias Current
VPIN 1 = 5V
PSRR
IB
12 ≤ VCC ≤ 25V
-10
-10
150 300
150 300
Delay to Output (Note 2)
Output Section
Tpd
VPIN 3 = 0 to 2V
Output Low Level
ISINK = 20mA
ISINK = 200mA
0.1 0.4
1.5 2.2
0.1 0.4
1.5 2.2
V
V
VOL
Output High Level
ISOURCE = 20mA
13 13.5
12 13.5
13 13.5
12 13.5
50 150
V
V
VOH
ISOURCE = 200mA
TJ = 25°C, CL = 1nF
TJ = 25°C, CL = 1nF
VCC = 5V, ISINK = 10mA
Rise Time (Note 2)
Fall Time (Note 2)
UVLO Saturation
TR
TF
VSAT
50 150
50 150
0.7 1.2
ns
ns
V
50 150
0.7 1.2
(Electrical Characteristics continue next page.)
Copyright © 1995
Rev. 1.2 12/95
3
MICROSEMI [ Microsemi ]
