GS2019
300mA, Low Dropout,Linear Regulators
GENERAL DESCRIPTION
The GS2019 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
GS2019 series also offer ultra-low dropout voltage
to prolong battery life in portable electronics.
Systems requiring a quiet voltage sources, such
as RF applications, will benefit from the GS2019
series ultra-low output noise (30uV
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 1.2V to 5.0V. Other features include a
10nA logic-controlled shutdown mode, foldback
current limit and thermal shutdown protection.
The GS2019 is available in Green SOT-23-5 and
SC70-5 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(74dB at 1kHz)
10nA Logic-Controlled Shutdown
Available in Multiple output Voltage Versions
Fixed Outputs of 1.2V, 1.5V, 1.8V, 2.5V, 2.8V,
2.85V, 3.0V and 3.3V
Adjustable Output from 1.2V to 5.0V
-40°C to 85°C Operating Temperature Range
Available in Green SC70-5 and SOT-23-5
Packages
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCMCIA Cards
Modems
MP3 Player
Hand-Held Instruments
Portable/Battery-Powered Equipment
ORDERING INFORMATION
Order Number
GS2019-TR
GS2019-CR
Package Type
SOT-23-5
SC70-5
Temperature
Range
-40°C to +85°C
-40°C to +85°C
Marking
LKXX
1
LKXX
1
QTY/Reel
3000
3000
NOTE 1:XX: voltage version (12:1.2V, 15:1.5V, 18:1.8V, 25:2.5V, 28:2.8V, 285:2.85V, 30:3.0V, 33:3.3V, AJ:Adjustable)
GS2019
ABSOLUTE MAXIMUM RATINGS
IN to GND.......................................................-0.3V to 6V
EN to GNDEEEEE....................................-0.3V to V
IN
OUT, BP/FB to GND...........................-0.3V to (V
IN
+0.3V)
Output Short-Circuit Duration.................................Infinite
Power Dissipation, P
D
@T
A
=25
CAUTION
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. Broadchip 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.
SOT-23-5..................................................................0.4W
SC70-5.....................................................................0.3W
Package Thermal Resistance
SOT-23-5, θ
JA
......................................................260 /W
SC70-5, θ
JA
..........................................................330 /W
Operating Temperature Range.................-40
Storage Temperature Range....................-65
to +85
to 150
Junction Temperature..............................................150
Lead Temperature (Soldering, 10 sec).....................260
ESD Susceptibility
HBM.....................................................................2000V
MM.........................................................................200V
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.
℃
℃
℃
℃
℃
℃
℃
℃
℃
Broadchip reserves the right to make any change in circuit
design, specification or other related things if necessary
without notice at any time. Please contact Broadchip sales
office to get the latest datasheet.
GS2019
PIN CONFIGURATION
SOT23-5/SC70-5
TOP VIEW
IN
1
MARKING
5
OUT
GND
2
EN
3
4
BP/FB
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
2
3
IN
GND
EN
BP
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1uF
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
0.01uF 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.
4
FB
5
OUT
GS2019
ELECTRICAL CHARACTERISTICS
PARAMETER
Input Voltage
Output Voltage Accuracy
(1)
Maximum Output Current
Current Limit
Ground Pin Current
Dropout Voltage
(2)
I
LIM
I
Q
No load, EN=2V
I
OUT
=1mA
I
OUT
=300mA
V
LNR
V
IN
=2.5V or (V
OUT
+0.5V) to
5.5V, I
OUT
=1mA
I
OUT
=0.1mA to 300mA,
C
OUT
=1uF, V
OUT
>2V
I
OUT
=0.1mA to 300mA,
C
OUT
=1uF, V
OUT
2V
f=10Hz to 100kHz,
C
BP
=0.01uF, C
OUT
=10uF
SYM
V
IN
I
OUT
=0.1mA
SOT-23-5
V
OUT
=1.2V,1.5V,1.8V, SC70-5
V
OUT
>2V, SC70-5
Output Voltage Noise
e
n
Power Supply Rejection Ratio
SHUTDWON
(3)
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
Shutdown Exit Delay
(4)
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
NOTES:
f=
C
BP
=0.1uF,
PSRR I
LOAD
=50mA, C
OUT
=1uF, 217Hz
V
IN
=V
OUT
+1V
f=1kHz
V
IH
V
IL
V
IN
=2.5V to 5.5V,
V
EN
=-0.3V to V
IN
1.5
I
B(SHDN)
EN=0V or EN=5.5V
I
Q(SHDN)
EN=0.4V
C
BP
=0.01uF, C
OUT
=1uF,
No Load
T
SHDN
T
SHDN
1. V
IN
= V
OUT (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 V
OUT
for V
IN
= V
OUT
+ 0.5V.
(Only applicable for V
OUT
= +2.5V to +5.0V.)
3. V
EN
= -0.3V to V
IN
4. Time needed for V
OUT
to reach 90% of final value.
≤
Δ
Δ
Load Regulation
Δ
Line Regulation
V
LDR
℃
℃
(V
IN
= V
OUT(NOMINAL)
+0.5V
(1)
, Full = -40
to +85
, unless otherwise specified.)
CONDITIONS
MIN
2.5
-2.5
300
150
250
800
100
0.9
270
0.02
400
0.05
200
mA
uA
mV
%/V
mA
TYP
MAX UNITS
5.5
2.5
V
%
0.002 0.005
%/mA
0.004 0.008
30
77
74
uV
RMS
dB
0.3
0.01
0.01
30
1
V
uA
uA
us
150
15
°C
°C
GS2019
TYPICAL APPLICATION CIRCUIT
C
BP
(nF)
None
0.001
0.01
0.1
1
10
100
Shutdown Exit Delay(us)
V
OUT
=2.8V, V
IN
=3.3V, EN=0V to 2V
I
LOAD
=50mA I
LOAD
=150mA I
LOAD
=300mA
21.5
21.5
22
22.5
25
30
265
21.5
21.5
22.5
23
27
35
280
21
22
22.5
23
28.5
39
300
PSRR(dB) at 217Hz
V
OUT
=2.8V, V
IN
=V
OUT
+1V
I
LOAD
=50mA I
LOAD
=150mA I
LOAD
=300mA
71.1
71.1
71.6
71.7
72.1
74.3
77
64.4
64.6
64.7
64.8
65.2
68.8
73.7
55
55.1
55.2
55.4
55.9
59.6
63.1
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