UC2844/45
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
(ICC+Iz)
IOUT
RATINGS
30
UNIT
mA
A
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 2)
Output Energy (Capacitive Load per cycle)
Current Sense and Voltage feedback Inputs
Error Amp Output Sink Current
Power Dissipation
1.0
W
5.0
μJ
V
VIN
-0.3 ~ +5.5
10
ISINK
mA
mW
°C
PD
862
Junction Temperature
TJ
+150
Operating Junction Temperature
Storage Temperature Range
TJ(OPR)
TSTG
-40 ~ +120
-65 ~ +150
°С
°C
Note:1.Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2.Maxmum package power dissipation limits must be observed.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
145
UNIT
Thermal Resistance(Junction-to-Air)
θJA
°C/W
ELECTRICAL CHARACTERISTICS
(Ta=25°C, VCC=15V, RT=10k, CT=3.3nF, -40°C ≤ TA ≤ 120°C, unless otherwise specified)
PARAMETER
REFERENCE SECTION
Reference Output Voltage
Line Regulation
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
VREF
△VOUT
△VOUT
IOUT=1.0mA,TJ=25 C
4.95
5.0
2.0
3.0
0.2
5.05
20
V
mV
V
CC=12V ~ 25V
Load Regulation
I
OUT=1.0mA ~ 20mA
25
mV
Temperature Stability
Total Output Variation over Line,
Load, Temperature
tS
mV/°C
VREF
4.9
-30
5.1
V
Output Noise Voltage
Long Term Stability
eN
S
f=10Hz ~ 10kHz, TJ=25°C
TA=125°C for 1000 Hours
50
5
μV
mV
mA
Output Short Circuit Current
OSCILLATOR SECTION
Oscillator Voltage Swing
Discharge Current
ISC
-85
-180
VOSC
1.6
10.8
52
V
IDSG
VOSC=2.0V, TJ=25°C
TJ=25°C,
LOW ≤ TA ≤ THI
mA
47
46
57
60
Frequency
fOSC
kHz
T
Frequency Change with Voltage
Frequency Change with Temperature
ERROR AMPLIFIER SECTION
Voltage Feedback Input
ΔfOSC/ΔV VCC=12V ~ 25V
ΔfOSC/ΔT TLOW ≤ TA ≤ THI
0.2
5.0
1.0
%
%
VFB
VOH
VOUT=2.5V
2.45
5.0
2.50
6.2
0.8
12
2.55
1.1
V
V
High
Output Voltage Swing
Low
RL=15k to ground, VFB=2.3V
RL=15k to VREF, VFB=2.7V
VOUT=1.1V, VFB=2.7V
VOUT=5.0V, VFB=2.3V
VFB=2.7V
VOL
Sink
Output Current
ISINK
2.0
mA
Source
ISOURCE
II(BIAS)
GVO
-0.5
-1.0
-0.1
90
Input Bias Current
-1.0
μA
dB
Open Loop Voltage Gain
Power Supply Rejection Ratio
Unity Gain Bandwidth
VOUT=2.0V ~ 4.0V
VCC=12V ~ 25V
65
60
PSRR
GBW
70
dB
TJ=25°C
0.7
1.0
MHz
UNISONIC TECHNOLOGIES CO., LTD
4 of 7
Ver.A
www.unisonic.com.tw
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