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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 (30µVRMS) and high PSRR.
An external noise bypass capacitor connected to the
device’s BP pin can further reduce the noise level.
FEATURES
Low Output Noise
Low Dropout Voltage
Thermal-Overload Protection
Output Current Limit
High PSRR (74dB at 1kHz)
10nA Logic-Controlled Shutdown
Available in Multiple Output Voltage Versions
Fixed Outputs of 1.2V, 1.5V, 1.8V, 2.5V, 2.6V, 2.8V,
2.85V, 3.0V and 3.3V
Adjustable Output from 1.2V to 5.0V
-40to +85Operating Temperature Range
Available in Green SC70-5 and SOT-23-5 Packages
The output voltage is preset to voltages in the range of
1.2V to 5.0V. Other features include a 10nA logic-
controlled shutdown mode, foldback current limit and
thermal shutdown protection.
The SGM2019 is available in Green SOT-23-5 and
SC70-5 packages. It operates over an ambient
temperature range of -40to +85.
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Portable/Battery-Powered Equipment
PRODUCT NAME STRUCTURE
SGM2019 - X X X G / TR
Tape and Reel
Green Product
Package Type
C5 SC70-5
N5 SOT-23-5
Operating Temperature Range
Y -40to +85
Output Voltages
1.2 1.2V
1.5 1.5V
1.8 1.8V
2.5 2.5V
2.6 2.6V
2.8 2.8V
2.85 2.85V
3.0 3.0V
3.3 3.3V
ADJ Adjustable
SG Micro Corp
www.sg-micro.com
REV. C

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SGM2019
PIN CONFIGURATIONS (TOP VIEW)
IN 1
5 OUT
GND 2
EN 3
4 BP/FB
SOT-23-5/SC70-5
NOTES:
1. The location of pin 1 on the YJxx is determined by orienting
the package marking as shown.
2. “xx” is the output voltage code. (For Example: when the
output voltage is 1.8V, it is expressed as 18.)
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.
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 VIN
OUT, BP/FB to GND................................... -0.3V to (VIN + 0.3V)
Power Dissipation, PD @ TA = 25
SOT-23-5.............................................................................0.4W
SC70-5 ...............................................................................0.3W
Package Thermal Resistance
SOT-23-5, θJA................................................................260/W
SC70-5, θJA....................................................................330/W
Operating Temperature Range............................-40to +85
Junction Temperature........................................................ 150
Storage Temperature Range..............................-65to +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.
PIN DESCRIPTION
PIN
SC70-5/SOT-23-5
1
2
3
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 Corp
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SGM2019
Low Power, Low Dropout,
RF-Linear Regulators
ELECTRICAL CHARACTERISTICS
(VIN = VOUT (NOMINAL) + 0.5V (1), Full = -40to +85, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP MIN TYP MAX UNITS
Input Voltage
Output Voltage Accuracy (1)
Maximum Output Current (1)
Current Limit (1)
VIN
IOUT = 0.1mA
SOT-23-5
VOUT = 1.2V, 1.5V, 1.8V, SC70-5
VOUT > 2V, SC70-5
ILIM
+25
+25
+25
+25
2.5
-2.5
300
150
250
310
500
5.5
2.5
V
%
mA
mA
Ground Pin Current
Dropout Voltage (2)
Line Regulation (1)
Load Regulation
Output Voltage Noise
Power Supply Rejection Ratio
SHUTDOWN (3)
IQ
ΔVLNR
ΔVLDR
en
PSRR
No load, EN = 2V
IOUT = 1mA
IOUT = 300mA
VIN = 2.5V or (VOUT + 0.5V) to 5.5V,
IOUT = 1mA
IOUT =0.1mA to 300mA, COUT = 1µF,
VOUT > 2V
IOUT =0.1mA to 300mA, COUT = 1µF,
VOUT 2V
f = 10Hz to 100kHz, CBP = 0.01µF,
COUT = 10µF
CBP = 0.1μF, ILOAD = 50mA, f = 217Hz
COUT = 1μF, VIN = VOUT+1V f = 1kHz
+25
+25
+25
+25
+25
+25
+25
100
0.9
270
0.02
200
400
0.05
µA
mV
%/V
0.002 0.005
0.004 0.008
%/mA
30 µVRMS
77 dB
74 dB
EN Input Threshold
EN Input Bias Current
VIH
VIL
IB(SHDN)
VIN = 2.5V to 5.5V, VEN = -0.3V to VIN
EN = 0V or EN = 5.5V
Full
Full
+25
Full
1.5
0.01
0.01
0.3
1
V
μA
Shutdown Supply Current
Shutdown Exit Delay (4)
IQ(SHDN)
EN = 0.4V
CBP = 0.01μF, COUT = 1μF, No Load
Full
+25
0.01
30
μA
μs
THERMAL PROTECTION
Thermal Shutdown Temperature TSHDN
150
Thermal Shutdown Hysteresis
ΔTSHDN
15
NOTES:
1. VIN = VOUT (NOMINAL) + 0.5V or 2.5V, whichever is greater.
2. The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V.
(Only applicable for VOUT = +2.5V to +5.0V.)
3. VEN = -0.3V to VIN
4. Time needed for VOUT to reach 90% of final value.
SG Micro Corp
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SGM2019
TYPICAL APPLICATION CIRCUIT
Low Power, Low Dropout,
RF-Linear Regulators
INPUT
2.5V to 5.5V
CIN
1μF
IN OUT
SGM2019
ON
OFF
EN BP
GND
OUTPUT
COUT
1μF
CBP
0.01μF
CBP (nF)
None
0.001
0.01
0.1
1
10
100
Shutdown Exit Delay (μs)
VOUT = 2.8V, VIN = 3.3V, EN = 0V to 2V
ILOAD = 50mA
21.5
ILOAD = 150mA
21.5
ILOAD = 300mA
21
21.5
21.5
22
22 22.5 22.5
22.5
23
23
25 27 28.5
30 35
39
265 280
300
PSRR (dB) at 217Hz
VOUT = 2.8V, VIN = VOUT + 1V
ILOAD = 50mA
71.1
ILOAD = 150mA
64.4
ILOAD = 300mA
55.0
71.1
64.6
55.1
71.6
64.7
55.2
71.7
64.8
55.4
72.1
65.2
55.9
74.3
68.8
59.6
77.0
73.7
63.1
SG Micro Corp
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SGM2019
TYPICAL APPLICATION CIRCUIT
Low Power, Low Dropout,
RF-Linear Regulators
INPUT
2.5V to 5.5V
IN
OUT
CIN
1μF
ON
OFF
SGM
2019-ADJ
EN FB
GND
OUTPUT
R1
COUT
1μF
R2
Standard 1% Resistor Values for Common Output Voltages of Adjustable Voltage Version
VOUT (V)
1.2
1.5
1.8
2.8
3.0
3.3
3.6
4.2
R1 (kΩ)
0
10.5
34
84.5
63.4
73.2
84.5
105
R2 (kΩ)
63.4
42.2
63.4
63.4
42.2
42.2
42.2
42.2
NOTE: VOUT = (R1 + R2)/ R2 × 1.207
SG Micro Corp
www.sg-micro.com
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