SGM2019
Low Power, Low Dropout,
RF - Linear Regulators
GENERAL DESCRIPTION
The SGM2019 series low-power, low-noise, low-dropout,
CMOS linear voltage regulators operate from a 2.5V to
5.5V input voltage. They are the perfect choice for low
voltage, low power applications. A low ground current
makes this part attractive for battery operated power
systems. The SGM2019 series also offer ultra low
dropout voltage to prolong battery life in portable
electronics. Systems requiring a quiet voltage source,
such as RF applications, will benefit from the SGM2019
series’ ultra low output noise (30µV
RMS
) 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
0.8V to 5.0V. Other features include a 10nA logic-
controlled shutdown mode, foldback current limit and
thermal shut-down protection.
The SGM2019 has Green SC70-5 and SOT23-5
packages. It
operates over an ambient temperature range
of -40°C to +85°C.
FEATURES
Low Output Noise
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
High PSRR (68dB at 1kHz)
10nA Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 0.9V, 1.2V, 1.3V, 1.5V, 1.8V, 2.1V,
2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V,
3.2V, 3.3V, 3.6V, 4.2V, 5.0V
Adjustable Output from 0.8V to 5.0V
-40℃ to +85℃ Operating Temperature Range
Green SC70-5 and SOT23-5 Packages
PRODUCT NAME STRUCTURE
SGM2019-XXX X XX G / TR
Tape and Reel
Green Product
Package Type
C5
N5
SC70-5 / SOT-353
SOT23-5
APPLICATIONS
Cellular Telephones
Cordless Telephones
PHS Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment
Operating Temperature Range
Y
-40℃ to +85℃
Output Voltage
0.9
1.2
1.3
1.5
.
.
.
0.9V
1.2V
1.3V
1.5V
.
.
.
3.6
4.2
5.0
ADJ
3.6V
4.2V
5.0V
adjustable
SG Micro Limited
www.sg-micro.com
REV. A. 2
SGM2019
PIN CONFIGURATIONS
(TOP VIEW)
IN
1
2
5
Low Power, Low Dropout,
RF - Linear Regulators
ABSOLUTE MAXIMUM RATINGS
IN to GND................................................................ -0.3V to 6V
Output Short-Circuit Duration .........................................Infinite
EN to GND.............................................................. -0.3V to V
IN
OUT, BP/FB to GND.................................. -0.3V to (V
IN
+ 0.3V)
Power Dissipation, P
D
@ T
A
= 25℃
SOT23-5.......................................................................... 0.34W
SC70-5 ......................................................................... 0.175W
Package Thermal Resistance
SOT23-5,
θ
JA
............................................................... 367℃/W
SC70-5,
θ
JA
..................................................................710℃/W
Operating Temperature Range......................... -40℃ to +85℃
Junction Temperature...................................................... 150℃
Storage Temperature...................................... -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.
YJxx
SOT23-5/SC70-5
OUT
GND
EN
3
4
BP/FB
Note1: The location of pin 1 on the YJxx is determined by
orienting the package marking as shown.
Note2: “xx” is the output voltage code. (For Example: when the
output voltage is 1.2V, it is expressed as 12.)
Note3: When the output voltage is 2.85V, it is expressed as
YJ2J.
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.
PIN DESCRIPTION
PIN
SC70-5 / SOT23-5
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.
SG Micro Limited
www.sg-micro.com
2
SGM2019
TYPICAL APPLICATION CIRCUIT
INPUT
2.5V TO 5.5V
IN
C
IN
1μF
ON
OFF
OUT
OUTPUT
Low Power, Low Dropout,
RF - Linear Regulators
INPUT
2.5V TO 5.5V
IN
OUT
OUTPUT
SGM
2019-ADJ
EN
GND
FB
R
1
C
OUT
1μF
ON
C
IN
1μF
SGM2019
EN
GND
BP
C
OUT
1μF
OFF
R
2
C
BP
0.01μF
Standard 1% Resistor Values for Common
Output Voltages of
Adjustable Voltage Version
V
OUT
(V)
0.8
1.0
1.5
1.8
2.5
2.7
2.85
2.9
3.0
3.6
R
1
(kΩ)
0
10.5
35.7
51.1
86.6
95.3
97.6
97.6
97.6
97.6
R
2
(kΩ)
40.2
40.2
40.2
40.2
40.2
40.2
37.4
37.0
35.7
28.0
Note: V
OUT
= (R
1
+ R
2
)/ R
2
× 0.8
SG Micro Limited
www.sg-micro.com
3
SGM2019
Low Power, Low Dropout,
RF - Linear Regulators
(1)
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT (NOMINAL)
+ 0.5V , Full = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Input Voltage
Output Voltage Accuracy
(1)
SYMBOL
V
IN
I
OUT
= 0.1mA
SOT23-5
CONDITIONS
TEMP
+25℃
+25℃
MIN
2.5
-2
300
120
150
250
310
TYP
MAX
5.5
+2
UNITS
V
%
Maximum Output Current
V
OUT
< 1V, SC70-5
V
OUT
> 2V, SC70-5
(1)
(1)
V
OUT
= 1.2V, 1.3V, 1.5V, 1.8V, SC70-5
(1)
+25℃
mA
Current Limit
Ground Pin Current
Dropout Voltage
Line Regulation
(2)
I
LIM
I
Q
No load, EN = 2V
I
OUT
= 1mA
∆V
LNR
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,
V
OUT
> 2V
I
OUT
=0.1mA to 300mA, C
OUT
= 1µF,
V
OUT
≤
2V
f = 10Hz to 100kHz, C
BP
= 0.01µF,
C
OUT
= 10µF
C
BP
= 0.1µF, I
LOAD
= 50mA,
C
OUT
= 1µF, V
IN
= V
OUT
+1V
f = 217Hz
f = 1kHz
+25℃
+25℃
+25℃
+25℃
500
120
0.9
270
0.02
0.002
400
0.05
0.005
220
mA
µA
mV
%/V
(1)
Load Regulation
∆V
LDR
+25℃
0.004
+25℃
+25℃
+25℃
Full
Full
+25℃
Full
+25℃
Full
+25℃
0.01
0.01
0.01
0.01
30
1
1.5
0.3
1
30
74
68
0.008
%/mA
Output Voltage Noise
Power Supply Rejection Ratio
SHUTDOWN
(3)
e
n
PSRR
µV
RMS
dB
dB
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay
(4)
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
EN
= -0.3V to V
IN
EN = 0V and EN = 5.5V
EN = 0.4V
C
BP
= 0.01µF, C
OUT
=1µF, No Load
V
µA
µA
µs
℃
℃
T
SHDN
∆T
SHDN
150
15
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: V
EN
= -0.3V to V
IN
Note 4: Time needed for V
OUT
to reach 90% of final value.
Specifications subject to changes without notice.
SG Micro Limited
www.sg-micro.com
4
SGM2019
Low Power, Low Dropout,
RF - Linear Regulators
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.
SG Micro Limited
www.sg-micro.com
5
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