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UC2842BN View Datasheet(PDF) - STMicroelectronics

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Description
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UC2842BN Datasheet PDF : 15 Pages
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THERMAL DATA
Symbol
Description
Rth j-amb Thermal Resistance Junction-ambient.
UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
Minidip
max. 100
SO8
150
Unit
°C/W
ELECTRICAL CHARACTERISTICS ( [note 1] Unless otherwise stated, these specifications apply for
-25 < Tamb < 85°C for UC284XB; 0 < Tamb < 70°C for UC384XB; Vi = 15V (note 5); RT = 10K; CT = 3.3nF)
Symbol
Parameter
REFERENCE SECTION
VREF Output Voltage
VREF Line Regulation
Test Conditions
Tj = 25°C Io = 1mA
12V Vi 25V
UC284XB
UC384XB
Unit
Min. Typ. Max. Min. Typ. Max.
4.95 5.00 5.05 4.90 5.00 5.10 V
2 20
2 20 mV
VREF Load Regulation
1 Io 20mA
3 25
3 25 mV
VREF/T Temperature Stability
(Note 2)
0.2
0.2
mV/°C
Total Output Variation
Line, Load, Temperature
4.9
5.1 4.82
5.18 V
eN
Output Noise Voltage
Long Term Stability
ISC Output Short Circuit
10Hz f 10KHz Tj = 25°C
50
(note 2)
50
µV
Tamb = 125°C, 1000Hrs
(note 2)
5 25
5 25 mV
-30 -100 -180 -30 -100 -180 mA
OSCILLATOR SECTION
fOSC Frequency
Tj = 25°C
49 52 55 49 52 55 KHz
TA = Tlow to Thigh
48 – 56 48 – 56 KHz
TJ = 25°C (RT = 6.2k, CT = 1nF) 225 250 275 225 250 275 KHz
fOSC/V Frequency Change with Volt. VCC = 12V to 25V
– 0.2 1 – 0.2 1 %
fOSC/T Frequency Change with Temp. TA = Tlow to Thigh
– 1 – – 0.5 – %
VOSC Oscillator Voltage Swing (peak to peak)
– 1.6 – – 1.6 – V
Idischg
Discharge Current (VOSC =2V) TJ = 25°C
TA = Tlow to Thigh
7.8 8.3 8.8 7.8 8.3 8.8 mA
7.5 – 8.8 7.6 – 8.8 mA
ERROR AMP SECTION
V2
Input Voltage
VPIN1 = 2.5V
2.45 2.50 2.55 2.42 2.50 2.58 V
Ib
Input Bias Current
VFB = 5V
-0.1 -1
-0.1 -2 µA
AVOL
BW Unity Gain Bandwidth
2V Vo 4V
TJ = 25°C
65 90
0.7 1
65 90
0.7 1
dB
MHz
PSRR Power Supply Rejec. Ratio 12V Vi 25V
60 70
60 70
dB
Io
Output Sink Current
VPIN2 = 2.7V VPIN1 = 1.1V 2 12
2 12
mA
Io
Output Source Current
VPIN2 = 2.3V VPIN1 = 5V
-0.5 -1
-0.5 -1
mA
VOUT High
VOUT Low
CURRENT SENSE SECTION
VPIN2 = 2.3V;
RL = 15Kto Ground
VPIN2 = 2.7V;
RL = 15Kto Pin 8
5 6.2
5 6.2
V
0.8 1.1
0.8 1.1 V
GV
Gain
(note 3 & 4)
2.85 3 3.15 2.85 3 3.15 V/V
V3
Maximum Input Signal
VPIN1 = 5V (note 3)
0.9 1 1.1 0.9 1 1.1 V
SVR
Ib
Supply Voltage Rejection
Input Bias Current
12 Vi 25V (note 3)
70
-2 -10
70
dB
-2 -10 µA
Delay to Output
150 300
150 300 ns
3/15
 

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