SG2002/A
GENERAL DESCRIPTION
The SG2002/A series low-power, low-noise, low-dropout,
CMOS linear voltage regulators operate from a 2.5V to 5.5V
input and deliver up to 300mA. They are the perfect choice
for low voltage, low power applications. An ultra low
ground current (110
µA
at 300mA output) makes this part
attractive for battery operated power systems. The
SG2002/A series also offer ultra low dropout voltage
(210mV at 300mA output) to prolong battery life in
portable electronics. Systems requiring a quiet voltage
source, such as RF applications, will benefit from the
SG2002/A series’ ultra low output noise (30µVRMS). An
external noise bypass capacitor connected to the device’s
BP pin can further reduce the noise level.
The output voltage is preset to voltages in the range of 1.5V
to 5.0V. Other features include a 10nA logic-controlled
shutdown mode,
foldback current limit
and thermal shut-
down protection.
Devices come in 5-pin SOT23 package.
300mA, Low Power, Low Noise
Low Dropout, Linear Regulators
FEATURES
-
Low Output Noise: 30µV
RMS
typ(10Hz to 100KHz)
-
Ultra-Low Dropout Voltage:
-
-
-
-
-
-
-
210mV at 300mA output
Low 77µA No-Load Supply Current
Low 110µA Operating Supply Current
at 300mA Output
Thermal-Overload Protection
Output Current Limit
Preset Output Voltages (±1.6% Accuracy)
10nA Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 1.5V, 1.8V, 2.5V, 2.8V, 2.85V,
3.0V,3.3V, and 5.0V
Adjustable Output from 1.5V to 5.0V
APPLICATIONS
Cellular Telephones
Cordless Telephones
PHS Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment
PIN CONFIGURATIONS（TOP VIEW）
SG2002/A
IN
1
2
5
OUT
GND
EN
3
4
SOT23-5
BP/FB
Shengbang Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
REV. B
ORDERING INFORMATION
MODEL
SG2002-1.5
SG2002-1.8
SG2002-2.5
SG2002-2.8
SG2002-2.85
SG2002-3.0
SG2002-3.3
SG2002-5.0
SG2002A
V
OUT
(V)
1.5V
1.8V
2.5V
2.8V
2.85V
3.0V
3.3V
5.0V
adjustable
PIN-
PACKAGE
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
SG2002-1.5XN5/TR
SG2002-1.8XN5/TR
SG2002-2.5XN5/TR
SG2002-2.8XN5/TR
SG2002-2.85XN5/TR
SG2002-3.0XN5/TR
SG2002-3.3XN5/TR
SG2002-5.0XN5/TR
SG2002-XN5/TR
PACKAGE
MARKING
X215
X218
X225
X228
X22J
X230
X233
X250
X2AA
PACKAGE
OPTION
- 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
- 40°C to +125°C
- 40°C to +125°C
- 40°C to +125°C
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
ABSOLUTE MAXIMUM RATINGS
IN to GND.................................................................... - 0.3V to +6V
Output Short-Circuit Duration ...........................................Infinite
EN to GND.................................................................. - 0.3V to +6V
OUT, BP/FB to GND......................................- 0.3V to (V
IN
+ 0.3V)
Power Dissipation, P
D
@ T
A
= 25℃
SOT23-5 .....................................................................................0.4W
Package Thermal Resistance
SOT23-5,
θ
JA
....................................................................... 250℃/W
Operating Temperature Range...........................- 40°C to +125°C
Junction Temperature...........................................................+150°C
Storage Temperature.............................................- 65°C to +150°C
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
PIN
1
2
3
4
4
5
NAME
IN
GND
EN
BP
FB
OUT
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND.
Ground.
Shutdown Input. A logic low reduces the supply current to 10nA. Connect to IN for normal operation.
Reference-Noise Bypass(fixed voltage version only). Bypass with a low-leakage 0.01µF ceramic capacitor for
reduced noise at the output.
Adjustable voltage version only—this is used to set the output voltage of the device.
Regulator Output.
２
SG2002/A
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT (NOMINAL)
+ 0.5V or 2.5V (whichever is greater), 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, V
OUT
≥2.5V,
T
A
= +25°C
I
OUT
= 0.1mA to 300mA, V
OUT
≥2.5V
T
A
= 0°C to +70°C
Output Voltage Accuracy
I
OUT
= 0.1mA to 300mA, V
OUT
≥2.5V
T
A
= - 40°C to +125°C
I
OUT
= 0.1mA to 300mA, V
OUT
,
＜2.5V
T
A
= - 40°C to +125°C
Maximum Output Current
Current Limit
Ground Pin Current
I
LIM
I
Q
No load, EN = 2V
I
OUT
= 300mA, EN = 2V
Dropout Voltage (Note1)
Line Regulation
Load Regulation
Output Voltage Noise
Power Supply Rejection Rate
SHUTDOWN
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay(Note2)
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T
SHDN
ΔT
SHDN
160
15
℃
℃
V
IH
V
IL
I
B(SHDN)
I
Q(SHDN)
V
IN
= 2.5V to 5.5V
EN = 0V and EN = 5.5V
EN = 0.4V
C
BP
= 0.01µF
C
OUT
= 1µF, No load
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
2.0
0.4
0.01
0.01
0.01
0.01
30
1
1
V
µA
µA
µs
ΔV
LNR
ΔV
LDR
I
OUT
= 1mA
I
OUT
= 300mA
V
IN
= 2.5V or (V
OUT
+ 0.1V) to 5.5V,
I
OUT
= 1mA
I
OUT
= 0.1mA to 300mA, C
OUT
= 1µF
f = 10Hz to 100KHz, C
BP
= 0.01µF,
C
OUT
= 10µF
C
BP
= 0.1µF, I
LOAD
= 50mA,
C
OUT
= 1µF
f = 100Hz,
f = 1KHz,
V
OUT
≤3.3V
V
OUT
＞3.3V
300
310
750
77
77
110
0.8
210
0.004
0.0005
30
74
54
340
0.15
0.002
mV
%/V
%/mA
µV
RMS
dB
dB
130
145
µA
CONDITIONS
MIN
2.5
-1.6
TYP
MAX
5.5
1.6
2.3
2.7
2.9
mA
mA
%
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
+ 0.5V. (Only
applicable for V
OUT
= +2.5V to +5.0V.)
Note 2:
Time needed for V
OUT
to reach 95% of final value.
３
SG2002/A
TYPICAL OPERATION CIRCUIT
INPUT
2.5V TO 5.5V
IN
C
IN
1μF
ON
OFF
OUT
OUTPUT
C
OUT
1μF
INPUT
2.5V TO 5.5V
IN
OUT
OUTPUT
SG2002A
EN
GND
FB
R
1
C
IN
1μF
ON
OFF
SG2002
EN
GND
BP
C
OUT
1μF
R
2
C
BP
0.01μF
Adjustable Voltage Version
Fixed Voltage Version
Standard 1% Resistor Values for Common
Output Voltages of
Adjustable Voltage Version
V
OUT
(V)
1.5
1.8
2.5
2.8
2.85
3.0
3.3
5.0
R
1
(kΩ)
13
28
63.4
78.7
80.6
88.7
95.3
187
R
2
(kΩ)
61.9
61.9
61.9
61.9
61.9
61.9
57.6
61.9
Note: V
OUT
= (
R
1
+
R
2
)/
R
2
× 1.2395
４
SG2002/A
TYPICAL OPERATING CHARACTERISTICS
V
IN
= V
OUT(NOMINAL)
+ 0.5V or 2.5V (whichever is greater), C
IN
= 1µF, C
OUT
= 1µF, C
BP
= 0.01µF, T
A
= +25℃, unless otherwise noted.
Ground Pin Current vs.Input Voltage
100
Ground Pin Current(µA)
80
60
No Load
40
20
V
OUT
= 2.5V
0
0
1
2
3
4
Input Voltage(V)
5
6
I
load
= 50mA
350
300
Ground Pin Current(µA)
250
200
150
100
50
0
0
Ground Pin Current vs.Input Voltage
I
load
= 50mA
No Load
V
OUT
= 5V
1
2
3
4
Input Voltage(V)
5
6
Output Voltage vs.Input Voltage
6
No Load
5
Output Voltage(V)
4
V
OUT
= 5V
3
2
V
OUT
= 2.5V
1
0
0
1
2
3
4
Input Voltage(V)
5
6
Output Voltage vs.Temperature
2.6
I
LOAD
= 150mA
Output Voltage(V)
2.55
2.5
2.45
V
OUT
= 2.5V
2.4
-40 -20
0
20 40 60 80
Temperature(℃)
100 120 140
Output Voltage vs.Temperature
5.2
Ground Pin Current(μA)
Ground Pin Current vs.Temperature
200
180
160
140
120
100
80
60
40
20
0
-40 -20
0
I
LOAD
= 150mA
V
OUT
= 2.5V
V
OUT
= 5V
I
LOAD
= 150mA
Output Voltage(V)
5.1
5
4.9
V
OUT
= 5V
4.8
-40 -20
0
20 40 60 80
Temperature(℃)
100 120 140
20 40 60 80
Temperature(℃)
100 120 140
５
SG2002/A
嵌入式系统
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