SGM2122
Dual, Low Dropout,
250mA LDO Regulators
GENERAL DESCRIPTION
The SGM2122 is a dual, low-power, low-dropout, CMOS
linear voltage regulator. It operates from a 2.5V to 5.5V
input and delivers up to 250mA at each channel.
The SGM2122 is the perfect choice for low voltage, low
power. The ground current is 190μA (both LDO’s enabled
and active) that makes this part attractive for battery
operated power systems. The SGM2122 also offers low
dropout voltage (250mV at 250mA output) to prolong
battery life in portable electronics.
Separate enable pins control each individual LDO output.
The EN function allows the output of each regulator to be
turned off independently, resulting in greatly reduced
power consumption. Other features include a 10nA
logic-controlled shutdown mode, foldback current limit
and thermal shutdown protection.
The SGM2122 is available in Green SOT-23-6 package.
It operates over an ambient temperature range of -40℃
to +85℃.
GND
2
OUT2
1
6
OUT1
FEATURES
Highly Accurate: ±2%
Ultra-Low Dropout Voltage:
250mV at 250mA Output
190µA No-Load Supply Current
Quick Auto-Discharge in Shutdown Status
Thermal-Overload Protection
Output Current Limit
10nA Logic-Controlled Shutdown
Operating Temperature Range: -40℃ to +85℃
Small Package
PIN CONFIGURATION
(TOP VIEW)
SGM2122
SYYxx
5
IN
EN2
3
4
EN1
SOT-23-6
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCS Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Wireless LAN
Portable/Battery-Powered Equipment
NOTE: The location of pin 1 on the SGM2122 is determined by
orienting the package marking as shown.
TYPICAL APPLICATION CIRCUIT
OUTPUT2
1μF
2
5
1μF
1
6
OUTPUT1
1μF
INPUT
OUT2
OUT1
GND
IN
SGM2122
ON
OFF
3
EN2
EN1
4
OFF
ON
SG Micro Corp
www.sg-micro.com
REV. A. 4
SGM2122
PACKAGE/ORDERING INFORMATION
ORDERING
NUMBER
SGM2122-AYN6G/TR
SGM2122-CYN6G/TR
SGM2122-DYN6G/TR
SGM2122-EYN6G/TR
SGM2122-GYN6G/TR
SGM2122-HYN6G/TR
SGM2122-IYN6G/TR
SGM2122-KYN6G/TR
SGM2122-MYN6G/TR
SGM2122-NYN6G/TR
SGM2122-OYN6G/TR
SGM2122-PYN6G/TR
SGM2122-QYN6G/TR
SGM2122-RYN6G/TR
SGM2122-SYN6G/TR
SGM2122-TYN6G/TR
SGM2122-UYN6G/TR
SGM2122-VYN6G/TR
SGM2122-WYN6G/TR
SGM2122-XYN6G/TR
SGM2122-YYN6G/TR
SGM2122-ABYN6G/TR
V
OUT1
2.8V
2.8V
2.8V
2.8V
2.5V
3.3V
3.3V
3.0V
2.8V
2.8V
2.8V
1.5V
2.5V
2.5V
1.3V
1.5V
3.3V
1.8V
1.2V
3.3V
1.8V
1.8V
V
OUT2
2.8V
3.0V
2.5V
1.8V
1.8V
2.5V
1.8V
1.8V
1.2V
1.3V
1.5V
2.8V
1.5V
2.8V
2.8V
3.3V
3.0V
3.3V
2.8V
2.8V
2.8V
1.2V
PIN-
PACKAGE
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SOT-23-6
SPECIFIED
TEMPERATURE
RANGE
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
-40℃ to +85℃
Dual, Low Dropout,
250mA LDO Regulators
PACKAGE
MARKING
S0CXX
S0DXX
S0EXX
S0FXX
S10XX
S11XX
S12XX
S13XX
S14XX
S15XX
S16XX
S17XX
S18XX
S19XX
S1AXX
S1BXX
S1CXX
S1DXX
S1EXX
S28XX
S29XX
S42XX
PACKAGE
OPTION
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
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
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
NOTE: Order number and package marking are defined as the follow:
ORDER NUMBER
SGM2122- X X X G / TR
Tape and Reel
Green Product
Package Type
N6
SOT-23-6
MARKING INFORMATION
SYY X X
Month assembled ("A" = Jan. "B" = Feb.
…
"L" = Dec.)
Year assembled ("9" = 2009, "A" = 2010
…)
Identify the product
For example: S0C9A (2009 year, the 1st month)
Operating Temperature Range
Y
-40℃ to +85℃
Output Voltages
A : 2.8V (output1), 2.8V (output2)
C : 2.8V (output1), 3.0V (output2)
D : 2.8V (output1), 2.5V (output2)
.
.
.
.
.
.
SG Micro Corp
www.sg-micro.com
2
SGM2122
ABSOLUTE MAXIMUM RATINGS
IN to GND..................................................................-0.3V to 6V
Output Short-Circuit Duration ..........................................Infinite
EN to GND...............................................................-0.3V to V
IN
OUT to GND...............................................-0.3V to (V
IN
+ 0.3V)
Power Dissipation, P
D
@ T
A
= 25℃
SOT-23-6 .........................................................................0.4W
Package Thermal Resistance
SOT-23-6,
θ
JA
............................................................. 310℃/W
Dual, Low Dropout,
250mA LDO Regulators
Operating Temperature Range........................-40℃ to +85℃
Junction Temperature.....................................................150℃
Storage Temperature Range..........................-65℃ to +150℃
Lead Temperature (soldering, 10s)................................260℃
ESD Susceptibility
HBM................................................................................4000V
MM....................................................................................400V
NOTE:
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.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause
damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
SGMICRO reserves the right to make any change in circuit design, specification or other related things if necessary without notice at
any time. Please contact SGMICRO sales office to get the latest datasheet.
PIN DESCRIPTION
PIN
1
2
3
4
5
6
NAME
OUT2
GND
EN2
EN1
IN
OUT1
Channel2 Output Voltage.
Common Ground.
On/Off Control 2. A logic low reduces the supply current to 10nA.
On/Off Control 1. A logic low reduces the supply current to 10nA.
Supply Input.
Channel1 Output Voltage.
FUNCTION
NOTE: If EN1 and EN2 are both low, both regulators and the reference turn off.
SG Micro Corp
www.sg-micro.com
3
SGM2122
Dual, Low Dropout,
250mA LDO Regulators
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT (NOMINAL)
+ 0.5V or 2.5V (whichever is greater), T
A
= -40℃ to +85℃. Typical values are at T
A
= +25℃, for each LDO unless
otherwise specified.)
PARAMETER
Input Voltage
Output Voltage Accuracy
Maximum Output Current
Current Limit
Ground Pin Current
Dropout Voltage
Line Regulation
Load Regulation
Power Supply Rejection Rate
SHUTDOWN
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay
(2)
(1)
(3)
SYMBOL
V
IN
CONDITIONS
I
OUT
= 0.1mA, T
A
= +25℃
MIN
2.5
-2
250
310
TYP
MAX
5.5
+2
UNITS
V
%
mA
mA
I
LIM
I
Q
EN = V
IN
, both LDOs No Load
I
OUT
= 1mA
ΔV
LNR
ΔV
LDR
PSRR
V
IH
V
IL
I
B(SHDN)
I
Q(SHDN)
I
OUT
= 250mA
V
IN
= 2.5V or (V
OUT
+ 0.5V) to 5.5V,
I
OUT
= 1mA
I
OUT
= 0.1mA to 250mA, C
OUT
= 1µF
I
LOAD
= 50mA, C
OUT
= 1µF
f = 100Hz
500
190
1
250
0.02
0.004
71
350
0.15
0.01
295
μA
mV
%/V
%/mA
dB
V
IN
= 2.5V to 5.5V
EN = 0V and EN = 5.5V
EN1 = EN2 = 0.4V
C
OUT
= 1µF, No load
T
A
= +25℃
T
A
= +85℃
T
A
= +25℃
T
A
= +85℃
T
A
= +25℃
2.0
0.4
0.01
0.01
0.01
0.01
20
155
20
1
1
V
μA
μA
μs
℃
℃
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T
SHDN
ΔT
SHDN
NOTES:
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 +3.3V)
2. Time needed for V
OUT
to reach 95% of final value.
3. Each channel provides 300mA of maximum output current when the condition of dissipating heat is good.
SG Micro Corp
www.sg-micro.com
4
SGM2122
Dual, Low Dropout,
250mA LDO Regulators
TYPICAL OPERATING CHARACTERISTICS
V
IN
= V
OUT (NOMINAL)
+ 0.5V or 2.5V (whichever is greater), C
IN
= 1μF, C
OUT
= 1μF, T
A
= +25℃, unless otherwise noted.
Output Voltage Accuracy vs. Temperature
0
Output Voltage Accuracy (%)
Ground Pin Current vs. Temperature
240
Ground Pin Current (μA)
225
210
195
180
165
150
No Load
-40
-15
10
35
Temperature (℃)
60
85
SGM2122-E
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-40
-15
10
35
Temperature (℃)
60
85
Output Voltage vs. Input Voltage
5
4
Output Voltage (V)
3
2
1
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
V
OUT
= 1.8V
No Load
V
OUT
= 2.8V
Ground Pin Current vs. Input Voltage
240
Ground Pin Current (µA)
200
160
120
80
40
No Load
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
SGM2122-E
SGM2122-E
300
Dropout Voltage (mV)
250
Dropout Voltage vs. Load Current
T
A
= +85℃
T
A
= +25℃
Ground Pin Current vs. Load Current
400
Ground Pin Current (µA)
350
300
250
200
150
Both Output Loaded
100
250
200
150
100
50
V
OUT
= 2.8V
0
0
50
100
150
200
Load Current (mA)
T
A
= -40℃
0
50
100
150
Load Current (mA)
200
250
SG Micro Corp
www.sg-micro.com
5
PCB设计
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