SG2012
GENERAL DESCRIPTION
The SG2012 low-power, low-dropout, CMOS linear voltage
regulators operate from a 2.5V to 5.5V input and deliver up
to 400mA. They are perfect choice for low voltage, low
power applications. An ultra low ground current (120
µA
at
400mA output) makes them attractive for battery operated
power systems. The SG2012 series also offer ultra low
dropout voltage (280mV at 400mA output) to prolong
battery life in portable electronics.
The output voltage is preset to voltages in the range of 1.5V
to 4.5V. Other features include
foldback current limit
and
thermal shut-down protection.
SG2012 comes in 3-pin SOT223 package.
400mA , Low Power, Low
Dropout, Linear Regulators
FEATURES
-
Ultra-Low Dropout Voltage:
-
-
-
-
-
-
280mV at 400mA output
Low 80µA No-Load Supply Current
Low 120µA Operating Supply Current
at 400mA Output
Thermal-Overload Protection
Output Current Limit
Preset Output Voltages
(±1.8%
Accuracy)
Output Voltage:
Available in Fixed Outputs of 1.5V, 1.8V, 2.5V, 2.8V,
3.0V, and 3.3V
PIN CONFIGURATIONS
（TOP
VIEW）
GND
APPLICATIONS
Cellular Telephones
Digital Cameras
MP3、MP4
USB 2.0
Modems
PC Cameras
Hand-Held Instruments
Electronic Dictionarys
Portable/Battery-Powered Equipment
1
OUT
2
GND
3
IN
SOT223-3
OUT
TYPICAL OPERATION CIRCUIT
INPUT
IN
C
IN
1μF
GND
OUT
C
OUT
1μF
OUTPUT
1
GND
2
OUT
3
IN
SOT223-3(R-Type)
SG Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
REV. B
ORDERING INFORMATION
MODEL
V
OUT
(V)
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
PIN-
PACKAGE
SOT223-3
SOT223-3(R-Type)
SOT223-3
SOT223-3(R-Type)
SOT223-3
SOT223-3(R-Type)
SOT223-3
SOT223-3(R-Type)
SOT223-3
SOT223-3(R-Type)
SOT223-3
SOT223-3(R-Type)
SPECIFIED
TEMPERATURE
RANGE
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
ORDERING
NUMBER
SG2012-1.5XKC3/TR
SG2012-1.5XKC3R/TR
SG2012-1.8XKC3/TR
SG2012-1.8XKC3R/TR
SG2012-2.5XKC3/TR
SG2012-2.5XKC3R/TR
SG2012-2.8XKC3/TR
SG2012-2.8XKC3R/TR
SG2012-3.0XKC3/TR
SG2012-3.0XKC3R/TR
SG2012-3.3XKC3/TR
SG2012-3.3XKC3R/TR
PACKAGE
MARKING
SG2012-1.5XKC3
SG2012-1.5XKC3R
SG2012-1.8XKC3
SG2012-1.8XKC3R
SG2012-2.5XKC3
SG2012-2.5XKC3R
SG2012-2.8XKC3
SG2012-2.8XKC3R
SG2012-3.0XKC3
SG2012-3.0XKC3R
SG2012-3.3XKC3
SG2012-3.3XKC3R
PACKAGE
OPTION
Tape and Reel, 2500
Tape and Reel, 2500
Tape and Reel, 2500
Tape and Reel, 2500
Tape and Reel, 2500
Tape and Reel, 2500
SG2012-1.5
SG2012-1.8
SG2012-2.5
SG2012-2.8
SG2012-3.0
SG2012-3.3
ABSOLUTE MAXIMUM RATINGS
IN to GND.....................................................................- 0.3V to +6V
Output Short-Circuit Duration............................................Infinite
OUT to GND...................................................- 0.3V to (V
IN
+ 0.3V)
Operating Temperature Range................. ..........- 40°C to +125°C
Junction Temperature...........................................................+150°C
Storage Temperature.............................................- 65°C to +150°C
Power Dissipation, P
D
@ T
A
= 25℃
SOT223-3...................................................................................0.74W
Package Thermal Resistance
SOT223-3,
θ
JA
.......................................................................135°C/W
Lead Temperature (soldering, 10s) ....................................+260°C
ESD Susceptibility
HBM..........................................................................................7000V
MM..............................................................................................400V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
PIN DESCRIPTION
NAME
IN
GND
OUT
FUNCTION
Regulator Input.
Supply voltage can range from 2.5V to 5.5V.
Ground.
Regulator Output.
２
SG2012
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT (NOMINAL)
+1V, T
A
= - 40°C to +125°C, unless otherwise noted. Typical values are at T
A
= + 25°C.)
PARAMETER
Input Voltage
SYMBOL
V
IN
I
OUT
= 0.1mA, T
A
= +25°C
I
OUT
= 0.1mA to 400mA,
Output Voltage Accuracy
T
A
= 0°C to +70°C
I
OUT
= 0.1mA to 400mA,
T
A
= - 40°C to +125°C
Output Current
Current Limit
Ground Pin Current
Dropout Voltage
(Note1)
Line Regulation
Load Regulation
Output Voltage Noise
Power Supply Rejection Rate
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T
SHDN
ΔT
SHDN
160
15
℃
℃
ΔV
LNR
ΔV
LDR
I
LIM
I
Q
No load
I
OUT
= 400mA
I
OUT
= 1mA
I
OUT
= 400mA
V
IN
= 2.5V or (V
OUT
+ 0.1V) to 5.5V,
I
OUT
= 1mA
I
OUT
= 0.1mA to 400mA, C
OUT
= 1µF
f = 10Hz to 100KHz, C
OUT
= 10µF
I
LOAD
= 50mA, C
OUT
= 1µF
f = 100Hz,
f = 1KHz,
400
410
750
80
120
0.8
280
0.004
0.0005
120
74
54
440
0.15
0.002
130
CONDITIONS
MIN
2.5
-1.8
TYP
MAX
5.5
1.8
2.6
3.1
mA
mA
µA
mV
%/V
%/mA
µV
RMS
dB
dB
%
UNITS
V
e
n
PSRR
Specifications subject to change without notice.
Note 1:
The dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100mV below the value of V
OUT
for V
IN
= V
OUT
+ 1V.
(Only applicable for V
OUT
= +2.5V to +4.5V)
３
SG2012
TYPICAL OPERATING CHARACTERISTICS
V
IN
= V
OUT (NOMINAL)
+ 1V, C
IN
= 1µF, C
OUT
= 1µF, T
A
= +25℃, unless otherwise noted.
Ground Pin Current vs.Input Voltage
100
80
60
No Load
40
20
V
OUT
= 2.5V
0
0
1
2
3
4
Input Voltage(V)
5
6
I
load
= 50mA
Ground Pin Current vs.Input Voltage
200
Ground Pin Current(µA)
Ground Pin Current(µA)
150
I
load
= 50mA
100
50
No Load
V
OUT
= 3.3V
0
0
1
2
3
4
Input Voltage(V)
5
6
Output Voltage vs.Input Voltage
6
No Load
5
4
V
OUT
= 3.3V
3
2
V
OUT
= 2.5V
1
0
0
1
2
3
4
Input Voltage(V)
5
6
Ground Pin Current vs.Load Current
190
180
170
160
150
140
130
120
110
100
90
80
70
60
0
100
Ground Current(µA)
Output Voltage(V)
V
OUT
= 3.3V
V
OUT
= 2.5V
200
300
Load Current(mA)
400
Output Voltage vs.Load Current
2.6
3.35
Output Vlotage vs.Load Current
Output Voltage(V)
Output Voltage(V)
2.55
3.325
2.5
3.3
2.45
V
OUT
= 2.5V
2.4
0
100
200
300
Load Current(mA)
400
3.275
V
OUT
= 3.3V
3.25
0
100
200
300
Load Current(mA)
400
４
SG2012
TYPICAL OPERATING CHARACTERISTICS
V
IN
= V
OUT (NOMINAL)
+1V, C
IN
= 1µF, C
OUT
= 1µF, T
A
= +25℃, unless otherwise noted.
Line-Transient Response
4.5V
3.5V
I
LOAD
= 150mA
3.1V
3V
2.9V
V
OUT
50mA
0mA
V
OUT
= 3V
100µS/div
V
IN
3.05V
3V
2.95V
Load-Transient Response
V
IN
= V
OUT
+ 0.5V
I
LOAD
= 0mA to 50mA
C
IN
= 1
μ
F
V
OUT
I
LOAD
V
OUT
= 3V
40µS/div
Load-Transient Response Near Dropout
3.05V
3V
2.95V
V
OUT
= 3V
V
OUT
Power-Supply Rejection Ratio
vs.Frequency
80
70
60
PSRR(dB)
50
40
30
20
10
0
0.01
C
OUT
= 1μF
C
OUT
= 10μF
I
LOAD
= 50mA
50mA
0mA
C
IN
= 1μF
V
IN
= V
OUT
+ 0.1V
I
LOAD
= 0mA to 50mA
40µS/div
I
LOAD
0.1
1
10
100
1000
Frequency(kHz)
Region of Stable C
OUT
ESR vs.Load Current
100
Current limit vs.Temperature
1200
1100
Current limit(mA)
V
OUT
= 3.3V
10
C
OUT
ESR(
Ω
)
C
OUT
= 10μF
1000
900
800
700
600
500
400
300
1
Stable Region
0.1
C
OUT
= 1μF
0.02
0.01
0
100
200
Load Current(mA)
300
400
-40 -20
0
20 40 60 80
Temperature(℃)
100 120 140
５
SG2012
微控制器 MCU
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