SGM2008
GENERAL DESCRIPTION
The SGM2008/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（200
µA
at 300mA output ) makes these part
attractive for battery operated power systems. The
SGM2008/A series also offer ultra low dropout voltage
(300mV at 300mA output) to prolong battery life in
portable electronics. Systems requiring a quiet voltage
source, such as RF applications, will benefit from the
SGM2008/A series’ ultra low output noise (30µVRMS) and
high PSRR. 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 3.6V. Other features include a 10nA high
logic-controlled shutdown mode,
foldback current limit
and thermal shut- down protection.
Devices come in 5-pin SOT23 package.
Low Power, Low Dropout,
300mA, RF - Linear Regulators
FEATURES
-
Low Output Noise: 30µV
RMS
typ(10Hz to 100KHz)
-
Ultra-Low Dropout Voltage:
-
-
-
-
-
-
-
300mV at 300mA output
Low 77µA No-Load Supply Current
Low 200µA Operating Supply Current
at 300mA Output
High PSRR (73dB at 1KHz)
Thermal-Overload Protection
Output Current Limit
10nA high Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 1.8V, 2.5V, 2.7V, 2.8V, 2.85V,
2.9V, 3.0V, 3.3V and 3.6V
PIN CONFIGURATIONS
（TOP
VIEW）
SGM2008
IN
1
2
5
OUT
APPLICATIONS
Cellular Telephones
Cordless Telephones
PHS Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment
GND
EN
3
SOT23-5
4
BP
Shengbang Microelectronics Co, Ltd
Tel: 86/451/84348461
www.sg-micro.com
REV. A
ORDERING INFORMATION
MODEL
SGM2008-1.8
SGM2008-2.5
SGM2008-2.7
SGM2008-2.8
SGM2008-2.85
SGM2008-2.9
SGM2008-3.0
SGM2008-3.3
SGM2008-3.6
V
OUT
(V)
1.8V
2.5V
2. 7V
2.8V
2.85V
2.9V
3.0V
3.3V
3.6V
PIN-
PACKAGE
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
SGM2008-1.8XN5/TR
SGM2008-2.5XN5/TR
SGM2008-2. 7XN5/TR
SGM2008-2.8XN5/TR
SGM2008-2.85XN5/TR
SGM2008-2.9XN5/TR
SGM2008-3.0XN5/TR
SGM2008-3.3XN5/TR
SGM2008-3.6XN5/TR
PACKAGE
MARKING
X818
X825
X827
X828
X82J
X829
X830
X833
X836
PACKAGE
OPTION
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
- 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 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
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.
2
SGM2008
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Voltage
Output Voltage Accuracy
(1)
Maximum Output Current
Current Limit
Ground Pin Current
Dropout Voltage
(2)
Line Regulation
(1)
Load Regulation
Output Voltage Noise
Power Supply Rejection Rate
SHUTDOWN
ΔV
LNR
ΔV
LDR
I
LIM
I
Q
No load,
EN
= 0.4V
SYMBOL
V
IN
(V
IN
= V
OUT (NOMINAL)
+ 0.5V
(1)
, T
A
= - 40°C to +125°C, unless otherwise noted. Typical values are at T
A
= + 25°C.)
CONDITIONS
I
OUT
=1mA to 300mA, T
A
= +25°C
V
OUT
+ 0.5V≤V
IN
≤
5.5V
MIN
2.5
-3
300
310
I
OUT
= 300mA,
EN
= 0.4V
I
OUT
= 1mA
I
OUT
= 300mA
V
IN
= 2.5V or (V
OUT
+ 0.5V) 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,
2.0
0.4
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
0.01
0.01
0.01
0.01
30
1
1
750
77
200
0.8
300
0.03
0.0008
30
78
73
380
0.15
0.002
145
TYP
MAX
5.5
+3
UNITS
V
%
mA
mA
µA
mV
%/V
%/mA
µV
RMS
dB
dB
e
n
PSRR
EN
Input Threshold
EN
Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay
(3)
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
IH
V
IL
I
B(SHDN)
I
Q(SHDN)
V
IN
= 2.5V to 5.5V
V
µA
µA
µs
EN
= 0V and
EN
= 5.5V
EN
= 2.0V
C
BP
= 0.01µF
C
OUT
= 1µF, No load
T
SHDN
ΔT
SHDN
160
15
℃
℃
Specifications subject to change without notice.
Note 1:
V
IN
= V
OUT(NOMINAL)
+ 0.5V or 2.5V, whichever is greater.
Note 2:
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 3:
Time needed for V
OUT
to reach 95% of final value.
３
SGM2008
TYPICAL OPERATION CIRCUIT
INPUT
2.5V TO 5.5V
IN
C
IN
1μF
OFF
ON
OUT
OUTPUT
SGM2008
EN
GND
BP
C
OUT
1μF
C
BP
0.01μF
PIN DESCRIPTION
PIN
1
2
3
4
5
NAME
IN
GND
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND.
Ground.
Shutdown Input. A high reduces the supply current to 10nA. Connect to GND for normal operation.
Reference-Noise Bypass. Bypass with a low-leakage 0.01µF ceramic capacitor for reduced noise at the output.
Regulator Output.
EN
BP
OUT
４
SGM2008
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.
Output Voltage vs.Load Current
2.9
3.4
Output Voltage vs.Load Current
Output Voltage(V)
Output Voltage(V)
V
OUT
= 2.8V
2.85
3.35
2.8
3.3
2.75
3.25
V
OUT
= 3.3V
3.2
2.7
0
100
200
Load Current(mA)
300
0
100
200
Load Current(mA)
300
Ground Pin Current vs.Load Current
200
190
180
170
160
150
140
130
120
110
100
90
80
70
0
Ground Pin Current vs.Input Voltage
200
V
OUT
= 2.8V
Ground Pin Current(µA)
160
120
80
No Load
40
0
Ground Pin Current(µA)
V
OUT
= 3.3V
I
load
= 50mA
V
OUT
= 2.8V
100
200
Load Current(mA)
300
0
1
2
3
4
Input Voltage(V)
5
6
Ground Pin Current vs.Input Voltage
200
V
OUT
= 3.3V
Ground Pin Current(µA)
160
120
80
40
0
0
1
2
3
4
Input Voltage(V)
5
6
I
load
= 50mA
Output Voltage(V)
5
4
3
2
1
0
0
6
Output Voltage vs.Input Voltage
No Load
V
OUT
= 3.3V
No Load
V
OUT
= 2.8V
1
2
3
4
Input Voltage(V)
5
6
５
SGM2008
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