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| SR2803 Datasheet, PDF (4/6 Pages) Unisonic Technologies – 330KHZ, 3A SYNCHRONOUS BUCK CONTROLLER | |||
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SR2803
LINEAR INTEGRATED CIRCUIT
 ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified )
PARAMETER
SYMBOL
RATINGS
UNIT
VCC Pin Voltage
VCC
VSS -0.3 ~VSS +28
V
Feedback Pin Voltage
VFB
VSS -0.3 ~ VCC
V
ON/OFF Pin Voltage
VEN
VSS - 0.3 ~ VCC+ 0.3
V
Switch Pin Voltage
VSW
VSS - 0.3 ~ VCC+ 0.3
V
Operating Supply Voltage
VOP
+4 ~ 28
V
Power Dissipation
PD
Internally limited
Storage Temperature
TSTG
-40 ~ +150
°C
Operating Temperature
TOPR
-20 ~ +125
°C
Note: 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.
 THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
Junction to Ambient
θJA
70
°С/W
Junction to Case
θJC
25
°С/W
Note: θJA is measured with the PCB copper area(need connect to SW pins) of approximately 1 in2(Multi-layer)
 ELECTRICAL CHARACTERISTICS (VIN = 12V, Ta= 25°C, unless otherwise specified.)
PARAMETER
Feedback Voltage
Feedback Bias Current
Switch Current
Standby Current
Quiescent Current
Oscillation Frequency
Frequency of Current Limit or Short
Circuit Protect
Line Regulation
Load Regulation
EN Pin Input Current
Soft-Start Time
Internal MOSFET RDS(ON)
EN Pin Logic input threshold voltage
Thermal shutdown Temp
SYMBOL
VFB
IFB(BIAS)
ISW
ISTN-BY
IQ
fOSC
fOSC1
ÎVOUT
VOUT
ÎVOUT
VOUT
ISH
ISL
TSS
RDS(ON)
VSH
VSL
TSD
TEST CONDITIONS
IOUT=0.2A
IOUT=0.1A
Pear current, No outside circuit
VFB=0V Force driver on
VEN=0V No outside circuit VFB=0V
Force driver on
VFB=1.2V Force driver off
Measure waveform at SW Pin
MIN
0.784
3.5
260
TYP
0.80
0.1
2
3
330
MAX UNIT
0.816 V
0.5 μA
A
10 μA
5 mA
400 KHz
Measure waveform at SW Pin
20 40
KHz
VCC=5V-28V, IOUT=0.2A
0.4
%
IOUT=0.2A-3A
VEN=2.5V(ON)
VEN=0.3V(OFF)
High-side Switch, ISW=1A
low-side Switch, ISW=1A
High(regulator ON)
Low(regulator OFF)
0.3
%
5
μA
0
μA
0.3 3.5 8 ms
70
mâ¦
50
mâ¦
1.6
V
0.8 V
150
°C
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R103-056.A
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