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Low Noise 150mA LDO Regulator GS7108
Features
Low Supply Current ~ 36uA (Typ.)
General Description
The GS7108 is a CMOS linear regulator. It is
Low Shutdown Current ~0.1uA (Typ.)
Output Current ~150mA
High Power Supply Rejection Ratio
~78db@1KHz
1.7~6.5V Operation
±1.0% Initial Voltage Accuracy
Low Temperature Drift Coefficient ~50ppm
Line Regulation ~0.02%/V(Typ.)
Low ESR Capacitor ~0.47uF ceramic
capacitor
uDFN4-1x1、SOT-23-5、SC-82、MSOT-23
package
Green Product (RoHS, Lead-Free,
Halogen-Free Compliant)
Applications
Portable communication equipment
featuring ultra-high power supply rejection ratio,
low output voltage noise, low dropout voltage, low
quiescent current and fast transient response. It
guarantees delivery of 150mA output current, and
supports preset 1.2V, 1.3V, 1.5V, 1.8V, 1.85V,
1.9V, 2.0V, 2.3V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V,
2.9V, 3.0V, 3.1V, 3.3V, 3.8V, 4.0V, 4.2V, 4.5V,
4.75V, 4.8V, 5.0V output voltage versions.
Based on its low quiescent current consumption
and its less than 1uA shutdown mode, the
GS7108 is ideal for battery- powered applications.
The high power supply rejection ratio of the
GS7108 holds well for low input voltages typically
encountered in battery- operated systems. The
regulator is stable with small ceramic capacitive
loads (0.47µF typical).
Notebook Computer
Battery Powered Systems
Typical Application
Figure.1 Typical Application of GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 1 Nov-14
Page 2
Current Limit
Vref
EN
+
-
EN Control
VDD
EN
GND
VOUT
0.3uA
Current Limit
Vref
EN
+
-
EN Control
VDD
EN
GND
VOUT
0.3uA
Low Noise 150mA LDO Regulator GS7108
Function Block Diagram
Figure 2a with auto discharge function (default)
Figure 2b without auto discharge function (special order)
Figure 2 Function Block Diagram
Green Solution Technology Co.,LTD.
Rev.:1.71 2 Nov-14
Example: GS7108 SC-82 2.5V Tape & Reel ordering information is “GS7108SC-2P5-R”
Absolute Maximum Rating (Note 1)
Green Solution Technology Co.,LTD.
Rev.:1.71 4 Nov-14
Page 5
Parameter
Symbol
Limits
Units
Thermal Resistance Junction to Ambient
θ
JA_uDFN4-1x1
250
°C/W
Thermal Resistance Junction to Case
θ
JC_uDFN4-1x1
67
°C/W
Thermal Resistance Junction to Ambient
θ
JA_SOT-23-5
238
°C/W
Thermal Resistance Junction to Case
θ
JC_SOT-23-5
110
°C/W
Thermal Resistance Junction to Ambient
θ
JA_SC-82
263
°C/W
Thermal Resistance Junction to Ambient
θ
JA_MSOT-23
263
°C/W
Thermal Resistance Junction to Case
θ
JC_MSOT-23
140
°C/W
Parameter
Symbol
Limits
Units
VIN to GND
VIN
1.7 to 6.5
V
Junction Temperature Range
TJ
-40 ~ 125
°C
Operating Temperature Range
TA
-40 ~ 85
°C
Parameter
Symbol
Conditions
Min
Typ
Max
Units
SUPPLY VOLTAGE SECTION
Supply Voltage
VIN
1.7 6.5
V
Supply Current
I
VIN
Unload
36
60
uA
Standby Current
I
STBY
VEN=0
0.1
1.0
uA
EN Input Current
IEN
VEN=VIN=7V
0.3 uA
Output Current
I
OUT
150
mA
OUTPUT SECTION
Output Voltage
V
OUT
TA = 25°C
V
OUT
>2.0V
x0.99
x1.01
V
V
OUT
≤2.0V
-20 20
mV
TA = -40°C to +85°C
V
OUT
>2.0V
x0.985
x1.015
V
V
OUT
≤2.0V
-30 30
mV
Low Noise 150mA LDO Regulator GS7108
Thermal Information (Note 3)
Recommend Operating Condition (Note 4)
Electrical Characteristics
(VIN = V
+ 1V, TA = -40°C to +85°C, CIN=CL=0.47uF, I
OUT
=1mA, unless otherwise specified)
OUT
Green Solution Technology Co.,LTD.
Rev.:1.71 5 Nov-14
Page 6
Dropout Voltage (Note 5)
V
DROP
I
OUT
=150mA
1.2V≤V
OUT
<1.5V
0.50
0.62
V
1.5V≤V
OUT
<1.7V
0.38
0.47
1.7V≤V
OUT
<2.0V
0.34
0.42
2.0V≤V
OUT
<2.5V
0.28
0.36
2.5V≤V
OUT
<2.8V
0.22
0.30
2.8V≤V
OUT
≤3.3V
0.21
0.27
3.3V≤V
OUT
≤4.0V
0.20
0.26
4.0V≤V
OUT
≤5.0V
0.19
0.25
Line Regulation
△V
LNR
VIN = V
OUT
+0.5V to 6.5V,
I
OUT
=1mA
0.02
0.10
%/V
Load Regulation
△V
LDR
VIN = V
OUT
+1V,
I
OUT
=1mA to 150mA
15
30
mV
Ripple Rejection Rate
PSRR
VIN=MAX{V
OUT
+1.0V, 3V}, Ripple
0.2Vp-p, I
OUT
=30mA, f=1KHz
78 dB
Limit Current
Ilim
VEN=VIN
260 mA
Short Current
Ishort
V
OUT
=0V
35 mA
EN Input Voltage High
V
ENH
1.5 V EN Input Voltage Low
V
ENL
0.3
V
CL Auto-Discharge Resistance
(Note 6)
Rdischg
VIN=4.0V, VEN=0V
100 Ω
Temperature Drift
△V
OUT
/△TA
I
OUT
=1mA,
TA = -40°C to +85°C
50
ppm/°C
Low Noise 150mA LDO Regulator GS7108
Note 1.Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the
device. These are for stress ratings. 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 remain possibility to
affect device reliability.
is measured in the natural convection at TA=25°C on a high effective thermal conductivity test
JA
board (4 Layers, 2S2P) of JEDEC 51-7thermal measurement standard.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The dropout voltage is defined as VIN - V
Note 6. The output voltage Auto discharge function is optional.
Green Solution Technology Co.,LTD.
Rev.:1.71 6 Nov-14
, which is measured when V
OUT
is 98%*V
OUT
OUT
.
Page 7
Output Voltage vs. Output Current
V
OUT
=1.8V, VDD=2.8V
V
OUT
=2.5V, VDD=3.5V
V
OUT
=2.8V, VDD=3.8V
V
OUT
=3.3V, VDD=4V
Output Voltage vs. Input Voltage
Low Noise 150mA LDO Regulator GS7108
Typical Characteristics
Green Solution Technology Co.,LTD.
Rev.:1.71 7 Nov-14
Page 8
V
OUT
=1.8V, I
OUT
=1mA,30mA,50mA
V
OUT
=2.5V, I
OUT
=1mA,30mA,50mA
V
OUT
=2.8V, I
OUT
=1mA,30mA,50mA
V
OUT
=3.0V, I
OUT
=1mA,30mA,50mA
Supply Current vs. Input Voltage
V
OUT
=1.2V, I
OUT
=unload
V
OUT
=2.5V, I
OUT
=unload
V
OUT
=2.8V, IOUT=unload
V
OUT
=3.3V, I
OUT
=unload
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 8 Nov-14
Page 9
Output Voltage vs. Temperature
V
OUT
=1.8V, I
OUT
=1mA, VDD=2.8V
V
OUT
=2.5V, I
OUT
=1mA, VDD =3.5V
V
OUT
=2.8V, I
OUT
=1mA, VDD=3.8V
V
OUT
=3.0V, I
OUT
=1mA, VDD=4.0V
Supply Current vs. Temperature
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 9 Nov-14
Page 10
V
OUT
=1.8V, I
OUT
=1mA, VDD=2.8V
V
OUT
=2.5V, I
OUT
=1mA, VDD =3.5V
V
OUT
=2.8V, I
OUT
=1mA, VDD=3.8V
V
OUT
=3.0V, I
OUT
=1mA, VDD=4.0V
Dropout Voltage vs. Output Current
V
OUT
=1.8V,Temp=-40℃,25℃,85℃
V
OUT
=2.5V,Temp=-40℃,25℃,85℃
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 10 Nov-14
Page 11
V
OUT
=2.8V,Temp=-40℃,25℃,85℃
V
OUT
=3.0V,Temp=-40℃,25℃,85℃
Dropout Voltage vs. Set Output Voltage
I
OUT
=30mA,60mA, 90mA, 120mA,150mA, Temp = 25°C
Ripple Rejection vs. Input Bias Voltage
I
OUT
=1mA, V
OUT
=2.8V, Freq=1kHz,10kHz,100kHz
I
OUT
=30mA, V
OUT
=2.8V, Freq=1kHz,10kHz,100kHz
Ripple Rejection vs. Frequency
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 11 Nov-14
Page 12
V
OUT
=1.8V, VDD=2.8V, I
OUT
=1mA
V
OUT
=2.5V, VDD=3.5V, I
OUT
=1mA
V
OUT
=2.8V, VDD=3.8V, I
OUT
=1mA
V
OUT
=3.0V, VDD=4.0V, I
OUT
=1mA
Input Transient Response
V
OUT
=1.8V, VDD=2.8V~3.8V~2.8V, I
OUT
=30mA
tr=tf=5us
V
OUT
=2.5V, VDD=3.5V~4.5V~3.5V, I
OUT
=30mA
tr=tf=5us
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 12 Nov-14
Page 13
V
OUT
=2.8V, VDD=3.8V~4.8V~3.8V, I
OUT
=30mA
tr=tf=5us
V
OUT
=3.0V, VDD=4.0V~5.0V~4.0V, I
OUT
=30mA
tr=tf=5us
Load Transient Response
V
OUT
=1.8V, I
OUT
=50mA~100mA~50mA, VDD=2.8V
tr=tf=0.5us
V
OUT
=1.8V, I
OUT
=1mA~150mA~1mA, VDD=2.8V
tr=tf=0.5us
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 13 Nov-14
Page 14
V
OUT
=2.5V, I
OUT
=50mA~100mA~50mA, VDD=3.5V
tr=tf=0.5us
V
OUT
=2.5V, I
OUT
=1mA~150mA~1mA, VDD=3.5V
tr=tf=0.5us
V
OUT
=2.8V, I
OUT
=50mA~100mA~50mA, VDD=3.8 V
tr=tf=0.5us
V
OUT
=2.8 V, I
OUT
=1mA~150mA~1mA, VDD=3.8V
tr=tf=0.5us
V
OUT
=3.0V, I
OUT
=50mA~100mA~50mA, VDD=4.0 V
tr=tf=0.5us
V
OUT
=3.0 V, I
OUT
=1mA~150mA~1mA, VDD=4.0V
tr=tf=0.5us
Turn On Speed with EN pin
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 14 Nov-14
Page 15
V
OUT
=1.8V, I
OUT
=0MA, VDD=2.8V
V
OUT
=1.8V, I
OUT
=30MA, VDD=2.8V
V
OUT
=1.8V, I
OUT
=150MA, VDD=2.8V
V
OUT
=2.5V, I
OUT
=0MA, VDD=3.5V
V
OUT
=2.5V, I
OUT
=30MA, VDD=3.5V
V
OUT
=2.5V, I
OUT
=150MA, VDD=3.5V
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 15 Nov-14
Page 16
V
OUT
=2.8V, I
OUT
=0MA, VDD=3.8V
V
OUT
=2.8V, I
OUT
=30MA, VDD=3.8V
V
OUT
=2.8V, I
OUT
=150MA, VDD=3.8V
V
OUT
=3.0V, I
OUT
=0mA, VDD=4.0V
V
OUT
=3.0V, I
OUT
=30mA, VDD=4.0V
V
OUT
=3.0V, I
OUT
=150mA, VDD=4.0V
Turn Off Speed with EN pin
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 16 Nov-14
Page 17
V
OUT
=1.8V, I
OUT
=0mA, VDD=2.8V
V
OUT
=1.8V, I
OUT
=30mA, VDD=2.8V
V
OUT
=1.8V, I
OUT
=150mA, VDD=2.8V
V
OUT
=2.5V, I
OUT
=0mA, VDD=3.5V
V
OUT
=2.5V, I
OUT
=30mA, VDD=3.5V
V
OUT
=2.5V, I
OUT
=150mA, VDD=3.5V
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 17 Nov-14
Page 18
V
OUT
=2.8V, I
OUT
=0mA, VDD=3.8V
V
OUT
=2.8V, I
OUT
=30mA, VDD=3.8V
V
OUT
=2.8V, I
OUT
=150mA, VDD=3.8V
VOUT=3.0V, I
OUT
=0mA, VDD=4.0V
V
OUT
=3.0V, I
OUT
=30mA, VDD=4.0V
V
OUT
=3.0V, I
OUT
=150mA, VDD=4.0V
Dropout Voltage vs. Temperature
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 18 Nov-14
Page 19
V
OUT
=1.8V, I
OUT
=30mA,90mA,150mA
V
OUT
=2.5V, I
OUT
=30mA,90mA,150mA
V
OUT
=2.8V, I
OUT
=30mA,90mA,150mA
V
OUT
=3.0V, I
OUT
=30mA,90mA,150mA
Low Noise 150mA LDO Regulator GS7108
Green Solution Technology Co.,LTD.
Rev.:1.71 19 Nov-14
Page 20
Low Noise 150mA LDO Regulator GS7108
Application Information
Enable
value might be extremely low. As a result, the
The GS7108 has a dedicated enable pin(EN).
When the EN pin is in the logic low (VEN<0.3V),
the regulator will be turned off, reducing the
supply current to less than 1uA.
When the EN pin is in the logic high (VEN>1.5V),
the regulator will be turned on. Left open, the EN
pin is pulled down by a internal resistor to shut
down the regulator.
Current Limit
The GS7108 contains an independent current
limit and short circuit current protection to prevent
unexpected applications. The current limit
monitors and controls the pass transistor’s gate
voltage, limiting the output current to higher than
260mA typical. When the output voltage is less
than 0.4V, the short circuit current protection
starts the current fold back function and maintains
capacitance might be much less than expected
value. In such cases, the operation might be
unstable at low temperature (-25°C or less). In
that case, use a larger capacity, or a large
dimensions’ capacitor. (For example 1.6mm by
0.8mm)
Input Capacitor
Good bypassing is recommended from input to
ground to help improve AC performance. A
0.47uF (X7R) input capacitor or greater located
as close as possible to the IC is recommended.
Place the capacitors physically as close as
possible to the device with wide and direct PCB
traces.
Power Dissipation and Layout Considerations
Excessive power dissipation may cause thermal
overload, and hence the increase of the IC
the loading current 35mA. The output can be
shorted to ground indefinitely without damaging
the part.
Output Capacitor
The GS7108 is specifically designed to employ
ceramic output capacitors as low as 0.47uF (X7R).
The ceramic capacitors offer significant cost and
space savings, along with high frequency noise
filtering. Place the capacitors physically as close
as possible to the device with wide and direct
PCB traces.
Ceramic capacitors have different temperature
characteristics and bias characteristics which
depend on their dimensions and manufacturers. If
the setting voltage is 2.5V or more and the
capacitor’s dimensions for V
by 0.5mm or smaller than that, the capacitance
equal to 1.0mm
OUT
junction temperature beyond a safe operating
level. For continuous operation, it is highly
recommended to keep the junction temperature
below the maximum operation junction
temperature 125°C for maximum reliability.
The relationship between θ
and T
JA
J(MAX)
can be
calculated as:
P
Where T
D(MAX)
= ( T
J(MAX)
− TA ) / θJA
J(MAX)
is the maximum operation junction
temperature 125°C, TA is the ambient
temperature and the θ
is the junction to ambient
JA
thermal resistance.
The power dissipation definition in device is:
PD = (VIN − V
OUT
) x I
+ VDD x IQ
OUT
As the above equations indicate, it is desirable to
work ICs whose θ
T
does not increase strongly with PD. To
J(MAX)
values are small such that
JA
Green Solution Technology Co.,LTD.
Rev.:1.71 20 Nov-14
Page 21
Low Noise 150mA LDO Regulator GS7108
avoid thermally overloading the GS7108, refrain
the IC die temperature significantly.
from exceeding the absolute maximum junction
temperature rating of 150°C under continuous
operating condition. Overstressing the regulator
with high loading currents and elevated
input-to-output differential voltages can increase
Green Solution Technology Co.,LTD.
Rev.:1.71 21 Nov-14
Page 22
D
E
e
1
2
3
4
Top View
Bottom View
Detail A
Pin #1 ID Options
Note:The configuration of the Pin#1 identifier is
optional,but must be located within the zone indicated.
Side View
See Detail A
1
1
L
b
D2
E2
A1
A
A3
pin 1 dot
Symbol
Dimensions in
Millimeters
Min
Max
A
0.45
0.60
A1
0.00
0.05
A3
0.10
0.152
b
0.15
0.30
D
0.90
1.10
D2
0.40
0.60
E
0.90
1.10
E2
0.40
0.60 e 0.65 REF.
L
0.20
0.30
Low Noise 150mA LDO Regulator GS7108
Package Dimensions, uDFN4-1x1
Note
1.Min.: Minimum dimension specified.
2.Max.: Maximum dimension specified.
3.REF.: Reference. Normal/Regular dimension specified for reference.
Green Solution Technology Co.,LTD.
Rev.:1.71 22 Nov-14
Page 23
A
L
DETAIL A
DETAIL A
c
A3
A1
e1
e
E
E1
D
b
5
4
1
2
3
Symbol
Dimensions in
Millimeters
Min.
Max.
A
0.90
1.45
A1
0.00
0.15
A3
0.90
1.30
b
0.30
0.50
c
0.08
0.25
e
0.95 REF.
e1
1.90 REF.
D
2.90 REF.
E
2.80 REF.
E1
1.60 REF.
L
0.30
0.60 θ 0o
8o
Low Noise 150mA LDO Regulator GS7108
Package Dimensions, SOT-23-5
˙
Note
1.Min.: Minimum dimension specified.
2.Max.: Maximum dimension specified.
3.REF.: Reference. Normal/Regular dimension specified for reference.
Green Solution Technology Co.,LTD.
Rev.:1.71 23 Nov-14
Page 24
E1
b1
D
e
A
c
L
DETAIL A
E
b
A2
A1
Symbol
Dimensions in
Millimeters
Min
Max
A
0.70
1.10
A1
0.00
0.10
A2
0.70
1.00
b
0.15
0.40
b1
0.30
0.50
c
0.08
0.26 e 1.30 REF.
D
1.80
2.20
E
1.80
2.45
E1
1.15
1.45
L
0.36 REF.
θ
0o
10o
Low Noise 150mA LDO Regulator GS7108
Package Dimensions, SC-82
Note˙
1.Min: Minimum dimension specified.
2.Max: Maximum dimension specified.
3.REF.: Reference. Normal/Regular dimension specified for reference.
Green Solution Technology Co.,LTD.
Rev.:1.71 24 Nov-14
Page 25
A
L
DETAIL A
DETAIL A
c
A3
A1
e1
e
E
E1
D
b
1
2
3
Symbol
Dimensions in
Millimeters
Min.
Max.
A
0.90
1.15
A1
0.00
0.10
A2
0.90
1.05
b
0.30
0.50
c
0.08
0.15 e 0.95 REF.
e1
1.90 REF.
D
2.90 REF.
E
2.40 REF.
E1
1.30 REF.
L
0.30
0.50 θ 0o
8o
Low Noise 150mA LDO Regulator GS7108
Package Dimensions, MSOT-23
Note:
1. Min.: Minimum dimension specified.
2. Max.: Maximum dimension specified.
3. REF.: Reference. Normal/Regular dimension specified for reference.
Green Solution Technology Co.,LTD.
Rev.:1.71 25 Nov-14
Page 26
Low Noise 150mA LDO Regulator GS7108
DISCLAIMERS
Please read the notice stated in this preamble carefully before Admission e accessing any contents of the
document attached. Admission of GStek’s statement therein is presumed once the document is released
to the receiver.
Notice:
Firstly, GREEN SOLUTION CO., LTD. (GStek) reserves the right to make corrections, modifications, enhancements, improvements, and
other changes to its information herein without notice.. And the aforesaid information does not form any part or parts of any quotation or
contract between GStek and the information receiver.
Further, no responsibility is assumed for the usage of the aforesaid information. GStek makes no representation that the interconnect
of its circuits as described herein will not infringe on exiting or future patent rights and other intellectual property rights, nor do the
descriptions contained herein express or imply that any licenses under any GStek patent right, copyright, mask work right, or other GStek
intellectual property right relating to any combination, machine, or process in which GStek products or services are used.
Besides, the product in this document is not designed for use in life support appliances, devices, or systems where malfunction of this
product can reasonably be expected to result in personal injury. GStek customers’ using or selling this product for use in such applications
shall do so at their own risk and agree to fully indemnify GStek for any damage resulting from such improper use or sale.
At last, the information furnished in this document is the property of GStek and shall be treated as highly confidentiality; any kind of
distribution, disclosure, copying, transformation or use of whole or parts of this document without duly authorization from GStek by prior
written consent is strictly prohibited. The receiver shall fully compensate GStek without any reservation for any losses thereof due to its
violation of GStek’s confidential request. The receiver is deemed to agree on GStek’s confidential request therein suppose that said receiver
receives this document without making any expressly opposition. In the condition that aforesaid opposition is made, the receiver shall
return this document to GStek immediately without any delay.
Green Solution Technology Co.,LTD.
Rev.:1.71 26 Nov-14
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