Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UC3383
CMOS IC
PFM CONTROLLED, STEP-UP
DC/DC CONVERTERS
(VARIABLE DUTY RATIO)
4
5
1

DESCRIPTION
The UTC UC3383 Series are PFM step-up DC/DC switching converter.
The UTC UC3383 can support both large and small currents. It
automatically switches duty ratio (45%/75%) when it senses changes in
load.
Both built-in and external transistor types include 5-pin and 3-pin
packages, which are provided with either a CE (chip enable) function that
reduces power consumption during shut-down mode, or a VDD pin
function (separated power and voltage detect pins).

1
2
3
SOT-25
SOT-89
FEATURES
* Output Voltage Range: 2.0V~7.0V in 0.1V Increments
* Operating (Start-up) Voltage Range: 0.9V~10V
* Highly Accurate: Set-up Voltage ±2.5%
* Maximum Oscillator Frequency (Max Fosc1): 180kHz (±15%)
* Variable Duty Ratio: 45%/75% (±5%)
* Both Switching Transistor Built-in and External Types are Available
* 5-Lead Package Offer Chip Enable or Independent VOUT Pin Option.

RDERING INFORMATION
Ordering Number
Package
UC3383G-xx-AB3-R
SOT-89
UC3383G-xx-AF5-R
SOT-25
Note: Pin Assignment: NC: No Connection CE: Chip Enable
xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd.
1
VSS
CE
Pin Assignment
2
3
4
VOUT Lx
VOUT NC VSS
5
Lx
Packing
Tape Reel
Tape Reel
1 of 14
QW-R502-032.K
UC3383

CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
20:2.0V
25:2.5V
26:2.6V
27:2.7V
28:2.8V
30:3.0V
31:3.1V
32:3.2V
33:3.3V
36:3.6V
37:3.7V
40:4.0V
45:4.5V
50:5.0V
SOT-25
SOT-89

PIN DESCRIPTION
PIN NO.
SOT-25
SOT-89
1
2
2
3
4
1
5
3

MARKING
PIN NAME
CE
VOUT
NC
VSS
Lx
FUNCTION
Chip Enable
Output voltage monitor, IC internal power supply
No Connection
Ground
Switch
BLOCK DIAGRAM
UTC UC3383 (VDD is internally connected to the VOUT pin.)
VDD
Lx
VLx limiter
VREF
2step PFM Control
OSC 100/180 kHz
+
-
VOUT
Buffer
Vss
Chip Enable
+
-
~5mV
CE
Note: The CE pin is only used with the 5-Lead Package.
UNISONIC TECHNOLOGIES CO., LTD
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2 of 14
QW-R502-032.K
UC3383

CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25°С, unless otherwise specified)
PARAMETER
VOUT Input Voltage
Lx pin Voltage
CE Input Voltage
VDD Input Voltage
Lx pin Current
RATINGS
UNIT
12
V
12
V
12
V
12
V
400
mA
SOT-89
500
mW
Power Dissipation
PD
SOT-25
250
mW
Operating Junction Temperature
TJ
+125
°C
Ambient Operating Temperature
TOPR
-30 ~ +80
°C
Storage Temperature
TSTG
-40 ~ +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.

SYMBOL
VOUT
VLx
VCE
VDD
ILX
ELECTRICAL CHARACTRISTICS(TA=25°С, VIN=VOUT× 0.6, unless otherwise specified)
UTC UC3383-2.0V (IOUT=10mA)
PARAMETER
Output Voltage
Maximum Input Voltage
Oscillation Start-up Voltage
Oscillation Hold Voltage
Lx Limit Voltage
No-Load Input Current
Supply Current 1(Note 2)
Supply Current 2
Lx Leakage Current
SYMBOL
VOUT
VIN
VST
VHLD
VLxLMT
IIN
IDD1
IDD2
ILXL
Lx Switch-On Resistance
RSWON
Duty Ratio 1
DTY1
Duty Ratio 2
Efficiency
DTY2
EFFI
FOSC1
FOSC2
Maximum Oscillation Frequency
TEST CONDITIONS
L, SD, CL etc. connected
IOUT=1mA
IOUT=1mA
Same as IDD1. FOSC>FOSC1×2
IOUT=0mA (Note 1)
VIN=VOUT×0.95
VIN=VOUT+0.5V
No external components,
VOUT=VLx=10V.
Same as IDD1. VLx=0.4V
Same as IDD1. Measuring of Lx
waveform
IOUT=1mA. Measuring of Lx on-time
L, SD, CL etc. connected
Same as IDD1. 75% duty
Same as IDD1. 45% duty
MIN
TYP MAX
1.950 2.000 2.050
10
0.80
0.90
0.70
0.7
1.1
4.3
8.6
13.6
27.3
1.9
3.9
UNIT
V
V
V
V
V
μA
μA
μA
1.0
μA
9.1
13.7
Ω
70
75
80
%
50
55
70
120
180
60
%
%
kHz
kHz
100
150
130
210
FOR 5-PINS PACKAGE ONLY
High
VCEH
Low
VCEL
High
Low
ICEH
ICEL
ISTB
CE Voltage
CE ”High” Current
Stand-by Current
Same as IDD1.
Existence of Lx Oscillation.
Same as IDD1.
Disappearance of Lx Oscillation
Same as IDD1. VCE=VOUT×0.95
Same as IDD1. VCE=0V
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
3 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-2.5V (IOUT=10mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD1. FOSC>FOSC1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
FOSC1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
FOSC2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-2.6V (IOUT=10mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD1. FOSC>FOSC1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1.Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
FOSC1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
FOSC2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP MAX UNIT
2.438 2.500 2.563
V
10
V
0.80 0.90
V
0.70
V
0.7
1.1
V
4.45 8.95
μA
16.65 33.35
μA
2.0
4.05
μA
1.0
μA
7.15 10.8
Ω
70
75
80
%
40
45
50
%
70
%
100
120
130
kHz
150
180
210
kHz
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MIN TYP MAX UNIT
2.535 2.600 2.665
V
10
V
0.80 0.90
V
0.70
V
0.7
1.1
V
4.48 9.02
μA
17.26 34.56 μA
2.02 4.08
μA
1.0
μA
6.76 10.22
Ω
70
75
80
%
40
45
50
%
70
%
100
120
130
kHz
150
180
210
kHz
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
4 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-2.7V (IOUT=10mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD1. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1.Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-2.8V (IOUT=10mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD1. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1,.Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP MAX
2.633 2.700 2.768
10
0.80
0.90
0.70
0.7
1.1
4.51
9.09
17.87 35.77
2.04
4.11
1.0
6.37
9.64
70
75
80
40
45
50
70
100
120
130
150
180
210
0.75
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MIN
TYP MAX
2.730 2.800 2.870
10
0.80
0.90
0.70
0.7
1.1
4.54
9.16
18.48 36.98
2.06
4.14
1.0
5.98
9.06
70
75
80
40
45
50
70
100
120
130
150
180
210
0.75
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
5 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-3.0V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
Output Voltage
VOUT L, SD, CL etc. connected
2.925 3.000
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
0.80
Oscillation Hold Voltage
VHLD IOUT=1mA
0.70
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
0.7
No-Load Input Current
IIN
IOUT=0mA (Note 1)
4.6
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
19.7
Supply Current 2
IDD2
VIN=VOUT+0.5V
2.1
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
5.2
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
70
75
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
40
45
Efficiency
EFFI L, SD, CL etc. connected
80
Fosc1 Same as IDD1. 75% duty
100
120
Maximum Oscillation Frequency
150
180
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
0.75
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-3.1V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1, Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
3.023 3.100
0.80
0.70
0.7
4.635
20.3
2.115
70
40
100
150
5.08
75
45
80
120
180
MAX
3.075
10
0.90
1.1
9.3
39.4
4.2
1.0
7.9
80
50
130
210
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MAX
3.178
10
0.90
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
1.1
9.365
40.6
4.23
1.0
7.72
80
50
130
210
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
6 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-3.2V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-3.3V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
3.120
TYP
3.200
0.80
0.70
0.7
4.67
20.9
2.13
70
40
100
150
4.96
75
45
80
120
180
MAX
3.280
10
0.90
1.1
9.34
41.8
4.26
1.0
7.54
80
50
130
210
0.75
V
MIN
TYP
3.218 3.300
0.80
0.70
0.7
4.705
21.5
2.145
70
40
100
150
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
4.84
75
45
80
120
180
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MAX
3.383
10
0.90
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
1.1
9.41
43
4.29
1.0
7.36
80
50
130
210
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
7 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-3.6V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-3.7V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
3.510
TYP
3.600
0.80
0.70
0.7
4.81
23.3
2.19
70
40
100
150
4.48
75
45
80
120
180
MAX
3.690
10
0.90
1.1
9.62
46.6
4.38
1.0
6.82
80
50
130
210
0.75
V
MIN
TYP
3.608 3.700
0.80
0.70
0.7
4.845
23.9
2.205
70
40
100
150
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
4.36
75
45
80
120
180
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MAX
3.793
10
0.90
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
1.1
9.755
47.8
4.41
1.0
6.64
80
50
130
210
0.75
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
8 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-4.0V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
Stand-by Current
ISTB
Same as IDD1.
UTC UC3383-4.5V (IOUT=30mA)
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT L, SD, CL etc. connected
Maximum Input Voltage
VIN
Oscillation Start-up Voltage
VST
IOUT=1mA
Oscillation Hold Voltage
VHLD IOUT=1mA
Lx Limit Voltage
VLxLMT Same as IDD. FOSC>Fosc1×2
No-Load Input Current
IIN
IOUT=0mA (Note 1)
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
Supply Current 2
IDD2
VIN=VOUT+0.5V
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
Efficiency
EFFI L, SD, CL etc. connected
Fosc1 Same as IDD1. 75% duty
Maximum Oscillation Frequency
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
CE ”High” Current
Same as IDD1. VCE=0V
Low
ICEL
Stand-by Current
ISTB
Same as IDD1.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
3.900 4.000
0.80
0.70
0.7
4.95
25.7
2.25
70
40
100
150
4.0
75
45
80
120
180
MAX
4.100
10
0.90
1.1
9.94
51.4
4.5
1.0
6.1
80
50
130
210
0.75
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
MIN
TYP MAX
4.388 4.500 4.613
10
0.80
0.90
0.70
0.7
1.1
5.125 10.25
28.8
57.6
2.325 4.65
1.0
3.4
5.2
70
75
80
40
45
50
80
100
120
130
150
180
210
0.75
UNIT
V
V
V
V
V
μA
μA
μA
μA
Ω
%
%
%
kHz
kHz
V
0.20
V
0.25
-0.25
0.5
μA
μA
μA
9 of 14
QW-R502-032.K
UC3383

CMOS IC
ELECTRICAL CHARACTRISTICS(Cont.)
UTC UC3383-5.0V (IOUT=50mA)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Output Voltage
VOUT L, SD, CL etc. connected
4.875 5.000 5.125
V
Maximum Input Voltage
VIN
10
V
Oscillation Start-up Voltage
VST
IOUT=1mA
0.80 0.90
V
Oscillation Hold Voltage
VHLD IOUT=1mA
0.70
V
Lx Limit Voltage
VLxLMT Same as IDD1. FOSC>Fosc1×2
0.7
1.1
V
No-Load Input Current
IIN
IOUT=0mA (Note 1)
5.3
10.6
μA
Supply Current 1(Note 2)
IDD1
VIN=VOUT×0.95
31.7 63.4
μA
Supply Current 2
IDD2
VIN=VOUT+0.5V
2.4
4.8
μA
Lx Leakage Current
ILXL
No external components, VOUT=VLx=10V.
1.0
μA
Lx Switch-On Resistance
RSWON Same as IDD1. VLx=0.4V
2.8
4.3
Ω
Duty Ratio 1
DTY1 Same as IDD1. Measuring of Lx waveform
70
75
80
%
Duty Ratio 2
DTY2 IOUT=1mA. Measuring of Lx on-time
40
45
50
%
Efficiency
EFFI L, SD, CL etc. connected
85
%
Fosc1 Same as IDD1. 75% duty
100
120
130
kHz
Maximum Oscillation Frequency
150
180
210
kHz
Fosc2 Same as IDD1. 45% duty
FOR 5-PINS PACKAGE ONLY
Same as IDD1.
0.75
V
High
VCEH
Existence of Lx Oscillation.
CE Voltage
Same as IDD1.
0.20
V
Low
VCEL
Disappearance of Lx Oscillation
High
ICEH
Same as IDD1. VCE=VOUT×0.95
0.25
μA
CE ”High” Current
Low
ICEL
Same as IDD1. VCE=0V
-0.25
μA
Stand-by Current
ISTB
Same as IDD1.
0.5
μA
Note: 1. The Schottky diode (SD) must be type MA735, with reverse current(IR)<1.0μA at reverse voltage (VR) =10V.
2. "Supply Current 1" is the supply current while the oscillator is continuously oscillating. The current actually
provided by an external VIN source is represented by "No-Load Input Current (IIN)".
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
10 of 14
QW-R502-032.K
UC3383

CMOS IC
TYPICAL APPLICATION CIRCUITS
UTC UC3383
1
2
3
L
VIN
VOUT
SD
+
L: 100µH
SD: MA735 (Schottky diode; MATSUSHITA)
C L : 16V 47µF
CL
GND
Fig.1 3-Lead Package Application(SOT-89)
4
5
L
VIN
UTC UC3383
1
3
2
VOUT
SD
CL
CE
+
L: 100µH
SD: MA735 (Schottky diode; MATSUSHITA)
CL : 16V 47µF
GND
Fig.2 5-Lead Package Application(SOT-25)
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www.unisonic.com.tw
11 of 14
QW-R502-032.K
UC3383
CMOS IC
TYPICAL CHARACTERISTICS (BUILT-IN SWITCHING TRANSISTOR)

(1) OUTPUT VOLTAGE vs. OUTPUT CURREN
L3383-3.0V
3.5
6
L=100µ H,C=47µ F (Tantalum)
2.5
Output Voltage, VOUT (V)
2.0V
3.0
Output Voltage, VOUT (V)
L3383-5.0V
1.5V
2.0
1.2V
1.5
1.8V
VIN =0.9V
1.0
0.5
0.0
20
0
40
60
80
4
2.0V
3
1.5V
2
VIN =0.9V
1
0
Output Current, IOUT (mA)
20
Eficiency, EFFI (%)
Eficiency, EFFI (%)
0.9V
1.5V
1.8V
20
0
0
20
40
60
80
1.2V
0.9V
40
0
20
40
60
80
Output Current, IOUT(mA)
(3) RIPPLE VOLTAGE vs. OUTPUT CURRENT
L3383-3.0V
L=100µH, C=47µ F (Tantalum)
L=100µH, C=47µ F (Tantalum)
100
Ripple, VR(mVP-P- )
Ripple, VR(mVP-P)
100
L3383-5.0V
120
80
VIN =1.5V
60
40
20
0
20
40
VIN=3.0V
80
2.0V
60
40
20
1.2V
0.9V
0
1.5V
20
0
100
2.0V
60
Output Current, IOUT(mA)
100
100
100 L=100µH, C=47µF (Tantalum)
VIN=3.0V
80
60
40
80
L3383-5.0V
VIN=2.0V
1.2V
60
Output Current, IOUT (mA)
L=100µH, C=47µF (Tantalum)
80
1.2V
40
(2) EFFICIENCY vs. OUTPUT CURRENT
(3)
L3383-3.0V
100
3.0V
5
0
100
L=100µ H,C=47µ F (Tantalum)
60
80
100
Output Current, IOUT(mA)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
0
1.5V
0
20
40
60
80
100
Output Current, IOUT(mA)
12 of 14
QW-R502-032.K
Lx Switching-on Resistance,
Rswon (Ω)
Current Consumption 1, IDD1 (μA)
Opfrating Start Voltage, Retain
Voltage, VST, VHLD(V)
Output Voltage, VOUT (V)
Opfrating Start Voltage, Retain
Voltage, VST, VHLD(V)

Current Consumption 2, IDD2 (μA)
UC3383
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
CMOS IC
TYPICAL CHARACTERISTICS FOR UC3383-5.0
QW-R502-032.K
13 of 14
UC3383
TYPICAL CHARACTERISTICS FOR UC3383-5.0V(cont.)
Dutyratio 1, 2 Duty 1, 2 (%)
Maximum Osc Frequency1, 2, Max
FOSC1, 2(kHZ)

CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
14 of 14
QW-R502-032.K
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