UC1901
UC2901
UC3901
ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for VIN = 10V, RT = 10kΩ, CT =
820pF, TA = TJ.
PARAMETER
TEST CONDITIONS
UC1901/UC2901
MIN TYP MAX
UC3901
TYP
UNITS
MIN
MAX
Reference Section
Output Voltage
TJ = 25°C
MIN ≤ TJ ≤ TMAX
1.485
1.470
1.5 1.515 1.47
1.5 1.530 1.455
1.5
1.5
2
1.53
1.545
15
V
T
Line Regulation
VIN = 4.5 to 35V
IOUT = 0 to 5mA
TJ = 25°C
2
4
10
10
mV
mV
mV
Load Regulation
Short Circuit Current
4
15
–35
–55
–35
–55
Error Amplifier Section (To Compensation Terminal)
Input Offset Voltage
Input Bias Current
Input Offset Current
Small Signal Open Loop Gain
CMRR
VCM = 1.5V
VCM = 1.5V
VCM = 1.5V
1
4
–3
1
1
8
–6
2
mV
µA
–1
–1
0.1
60
0.1
60
µA
40
60
80
0.4
90
–2
40
60
80
0.4
90
–2
dB
VCM = 0.5 to 7.5V
VIN = 2 to 25V
80
80
dB
PSRR
100
0.7
150
–3
100
0.7
150
–3
dB
Output Swing, ∆ VO
Maximum Sink Current
Maximum Source Current
Gain Band Width Product
Slew Rate
V
µA
mA
MHz
V/µS
1
1
0.3
0.3
Modulators/Drivers Section (From Compensation Terminal)
Voltage Gain
11
12
13
10
12
±
2.8
14
dB
V
±
±
±
Output Swing
1.6
2.8
1.6
500
–15
Driver Sink Current
500
–15
700
–35
25
700
–35
25
µA
Driver Source Current
mA
MHz
Gain Band Width Product
Oscillator Section
Initial Accuracy
TJ = 25°C
MIN ≤ TJ ≤ TMAX
140
130
150
160
170
.35
130
120
150
170
180
.60
kHz
kHz
%/V
MHz
V
T
Line Sensitivity
VIN = 5 to 35V
.15
5
.15
5
Maximum Frequency
Ext. Clock Low Threshold
Ext. Clock High Threshold
Status Indicator Section
Input Voltage Window
Saturation Voltage
RT = 10k, CT = 10pF
Pin 1 (CT) = VIN
Pin 1 (CT) = VIN
0.5
0.5
1.6
1.6
V
±
±
±
±
±
±
170
@ E/A Inputs, VCM = 1.5V
E/A ∆ Input = 0V, ISINK = 1.6mA
Pin 13 = 3V, E/A ∆ Input = 0.0V
Pin 13 = 40V, E/A ∆Input = 0.2V
VIN = 35V
135
8
150
165
130
8
150
mV
V
0.45
0.45
Max. Output Current
Leakage Current
15
.05
5
15
.05
5
mA
µA
mA
1
8
5
Supply Current
10
UVLO Section
Drivers Enabled Threshold
At Input Supply VIN
At Input Supply VIN
3.9
3.9
4.5
4.5
3.9
3.9
4.5
4.5
V
V
Status Output Enabled
Threshold
Change in Reference Output
When VIN Reaches UVLO
Threshold
–2
–30
–2
–30
mV
3
TI [ TEXAS INSTRUMENTS ]
