UTC1117
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
1
1A LOW DROPOUT POSITIVE
VOLTAGE REGULATOR
DESCRIPTION
The UTC1117 is a 1A low-dropout positive voltage regulator.
It is available in fixed and adjustable output voltage versions.
Over-current and thermal protection are integrated onto the
chip. Output current will decrease while it reaches the pre-set
current or temperature limit. The dropout voltage is specified at
1.2V Maximum at full rated output current. UTC1117 Series
provides excellent regulation over line, load and temperature
variations.
FEATURES
* Low dropout voltage ..............1.2V at 1A
* Adjustable or fixed voltages
* Typical line regulation ....... 0.2%
* Typical load regulation ...... 0.15%
* Adjust pin current less than 90mA
* Over-current protection
* Thermal protection
TO-252
APPLICATIONS
* High Efficiency Linear Regulators
* 5V to 3.3V Voltage Converter
* Battery Charger
* Post Regulators for Switching supplies
BLOCK DIAGRAM
Bandgap
Reference
Output
ADJ/COM
Input
Current
Limiting
Amplifier
Thermal
Protection
Error Amp.
PIN CONFIGURATION
1: GND/ADJ
2: V
OUT
3: V
IN
1: GND/ADJ
2: V
OUT
3: V
IN
1
2
3
1
2
3
TO-252 Top View
SOT-223 Top View
UTC1117
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
2
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol Value Unit
Input Voltage
V
IN
15 V
SOT-223 27*
Thermal Resistance
(Junction to Case)
TO-252
JC
15
SOT-223 63*
Thermal Resistance
(Junction to Ambient)
TO-252
JA
156
C
/W
Operating Junction Temperature Range
T
J
0 ~ 125
Storage Temperature Range
T
STG
-65 ~ 150
Lead Temperature ( 10 sec )
T
LEAD
260
C
* Surface Mounted on 4 layers board based on JEDIC standard JC15.1
ELECTRICAL CHARACTERISTICS
UTC1117ACCT (Adjustable Version)
Characteristic Symbol
Test
Condition
Min Typ. Max Unit
T
J
=25
C
1.238
1.250
1.262
Reference voltage
V
REF
V
IN
=5V,
I
O
=10mA
Over Temp.
1.225
1.250
1.275
V
V
IN
=4.75~7V,I
O
=10mA
T
J
=25
C
0.2
T
J
=25
C
0.3
Line regulation *
Reg
LINE
V
IN
=4.75~15V,I
O
=10mA
Over Temp.
0.4
T
J
=25
C
0.05
0.3
Load regulation
Reg
LOAD
V
IN
=5V,I
O
=10mA~1A
Over Temp.
0.2
0.4
%
Dropout voltage
V
D
I
O
=10mA~1A,
Vo=
1% Over Temp.
1.0
1.2
V
Current limit
I
S
V
IN
=2.75~7V Over
Temp.
1.0 A
Temperature
coefficient
T
C
V
IN
=2.75~7V,I
O
=10mA~1A
0.005
%/
C
T
J
=25
C
55
Adjust pin current
I
ADJ
V
IN
=2.75~7V, I
O
=10mA~1A
Over Temp.
90
Adjust pin current
change
I
ADJ
V
IN
=2.75~7V, I
O
=10mA~1A, Over Temp.
0.2
5
A
Temperature stability
T
S
V
IN
=2.75~7V, I
O
=10mA~1A, Over Temp.
0.5
%
Minimum load current
I
O
V
IN
=5V
5
10
mA
RMS output noise
V
N
T
J
=25
C
0.003
%Vo
Ripple rejection ratio
R
A
V
IN
=5V, I
O
=1A, Over Temp.
60
72
dB
UTC1117
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
3
UTC1117lCCCT (Fixed 3.3V Output Version)
Characteristic Symbol
Test
Condition
Min Typ. Max Unit
T
J
=25
C
3.270
3.3 3.330
Output voltage
Vo
V
IN
=5V,I
O
=0A
Over Temp.
3.234
3.3 3.330
V
V
IN
=4.75~7V,I
O
=0A
T
J
=25
C
0.2
T
J
=25
C
0.3
Line regulation *
R
eg
LINE
V
IN
=4.75~15V,I
O
=0A
Over Temp.
0.4
T
J
=25
C
0.05
0.3
Load regulation
R
eg
LOAD
V
IN
=5V,I
O
=0A~1A
Over Temp.
0.2
0.4
%
Dropout voltage
V
D
I
O
=0A~1A,
Vo=
1%, Over Temp.
1.0
1.2
V
Current limit
I
S
V
IN
=4.75~7V,Over Temp., Over Temp.
1.0
A
Quiescent Current
l
Q
V
IN
=5V,I
O
=0A~1A, Over Temp.
6
13
mA
Temperature
coefficient
T
C
V
IN
=4.75~7V,I
O
=0A~1A
0.005
%/
C
Temperature stability
T
S
V
IN
=5V, I
O
=100mA~1A, Over Temp.
0.5
%
RMS output noise
V
N
T
J
=25
C
0.003
%Vo
Ripple rejection ratio
R
A
V
IN
=5V, I
O
=1A, Over Temp.
60
72
dB
* Line regulation test circuit
100
10
Tan
164
10
Tan
V
IN
IN
ADJ
OUT 2
3
1
V
OUT
TYPICAL APPLICATION
UTC1117
4.75V
to 15V
10
F Tan
10
F
Tan
Load
Input range depends on Vo.
Please refer to electrical characteristics
UTC1117
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
4
PERFORMANCE CHARACTERISTICS
1.Load regulation
2.Short circuit current
-50
-30
-10
10
30
50
70
90
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
Tenperature (
)
O
u
t
put
Vol
t
age devi
a
t
i
on(
)
1.2
1.3
1.5 1.7
2
5
10
15
0.0
0.2
0.4
0.6
0.8
1.2
Input/Output Differential ( V )
Shot
Ci
r
c
ui
t
Cur
r
ent
(
A )
1.0
1.4
1.6
3.Temperature stability
4.Dropout voltage
-50 -25
0
25
50
75 100 125
1.238
1.240
1.242
1.244
1.246
1.248
1.250
1.252
Temperature ( )
Refer
enc
e V
o
l
t
age (
V
)
0.1
0.3
0.5
0.7
0.9
1
0
0.2
0.6
0.8
1.2
Output Current ( A )
Mi
nmum I
nput
/
O
ut
put
Di
f
f
e
r
ent
i
a
l
(
V )
1
1.4
0.4
5.Adjust pin current
6.Minimum operating current
-25
0
25
75 100 125
0
5
15
20
30
Temperature ( )
Adj
u
st
Pi
n C
u
r
r
ent
(
A )
25
35
10
-50
50
40
45
0 0.1 1 1.1 1.2 2
3
5
-0.5
0.0
0.5
1.0
1.5
2.5
Input/Output Differential ( V )
Minimum O
per
at
ing Cur
r
ent
(
mA
)
2.0
3.0
3.5
10 15 20 25 30 35
7.Load transient response
8.Line transient response
0.0
25
50
0
1
2
-0.1
0
0.1
Cin=10
U
F
Vo
Cout=10
U
F
Cout=1
U
F
Cout=0
U
F
Output
Voltage
Deviation
( V )
Load
Current
( A )
Time ( vS)
Vin=5V
Vo=3.3V
Preload=100mA
Io
5V
6V
-30mV
0
30mV
Time (
S )
Line Transient Response
Vo=Deviation
Cin=Co=IUF Io=0.1A Vo=3.3V
Vin
UTC1117
LINEAR INTEGRATED CIRCUIT
YOUWANG ELECTRONICS CO.LTD
5
ORDERING INFORMATION
PART NUMBER
OUTPUT VOLTAGE
PACKAGE
MARKING
OPERATING TEMP. RANGE
UTC1117ACGT
1.30 to 12.0
ABE###
0
C
to =125
C
UTC1117CCGT 3.3
SOT-223
ABF###
0
C
to =125
C
UTC1117ACCT
1.30 to 12.0
UTC1117
ACCT ####
0
C
to =125
C
UTC1117CCCT 3.3
TO-252
(DPAK)
UTC1117
CCCT ####
0
C
to =125
C
# represents the date code
APPLICATION DESCRIPTIONS
1. Output voltage adjustment
Like most regulators, the UTC1117 regulates the
output by comparing the output voltage to an internally
generated reference voltage. On the adjustable version,
the V
REF
is available externally as 1.25V between V
OUT
and ADJ. The voltage ratio formed by R1 and R2
should be set to conduct 10mA (minimum output load).
The output voltage is given by the following equation:
V
OUT
=V
REF
(1+
R1
R2
)+L
ADJ
R2
On fixed versions of UTC1117, the voltage divider is
provided internally.
V
IN
IN
ADJ
OUT 2
3
1
V
REF
R1
R2
V
OUT
I
ADJ
50
A
V
OUT
=V
REF
(1+
R1
R2
)+L
ADJ
R2
2.Thermal Protection
UTC1117 has thermal protection which limits junction temperature to 150
C
. However, device functionality is
only guaranteed to a maximum junction temperature of +125
C
. The power dissipation and junction temperature for
UTC1117 in DPAK package are given by
P
D
=(V
IN
-V
OUT
)
L
OUT
T
JUNCTION
=T
AMBIENT
+(P
D
JA
)
Note: T
JUNCTION
must not exceed 125
C
3.Current Limit Protection
UTC1117 is protected against overload conditions. Current protection is triggered at typically 1.5A..
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