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PDF GS7155NV Data sheet ( Hoja de datos )
| Número de pieza | GS7155NV | |
| Descripción | 3A Ultra Low Dropout Linear Regulator | |
| Fabricantes | GStek | |
| Logotipo |  |
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3A Ultra Low Dropout Linear Regulator
GS7155NV
Features
Maximum 3A Low-Dropout Voltage Regulator
Ultra Low Dropout Voltage
Typically 240mV at 3A Output Current
High Output Accuracy over Line, Load and
Temperature
Build-In Soft-Start
Excellent startup under load from 0 to 3A
Power-On-Reset Monitoring on Both VDD and
VIN Pins
Power-OK Output function
Foldback over Current Protection and
Thermal shutdown
0.1μA (typ) Shutdown Supply Current
Low ESR Output Capacitor(Multi-layer Chip
Capacitors (MLCC)) Applicable
Vout Pull Low Resistance when Disable
PSOP-8
Lead-Free and RoHS Compliant
Applications
Notebook PC Applications
Motherboard Applications
Low Voltage Logic Supplies
Microprocessor and Chipset Supplies
Graphic Cards
Cordless phones
General Description
The GS7155NV can deliver up to 3A of output
current with a typical dropout voltage of only
240mV using internal n-channel MOSFETs. The
linear regulator uses a separate VDD supply to
power the control circuitry and drive the Internal
n-channel MOSFETs. The output voltage is
adjustable from 0.8V to the voltage that is very
close to VIN.
The GS7155NV allows the use of low-ESR
ceramic capacitor as low as 10uF. Moreover the
IC provides good performance on both line
transient response and load transient response.
The GS7155NV provides foldback over current
limit and thermal shutdown to prevent the linear
regulator from damage. Built-in soft-start
minimizes stress on the input power source by
reducing capacitive inrush current on start-up.
During start-up, POK remain low until the output
reaches 92% of its rating value.
The GS7155NV is available in PSOP-8 package.
This document is GStek's confidential information. Anyone having confidential obligation to GStek shall keep this document confidential. Any unauthorized
disclosure or use beyond authorized purpose will be considered as violation of confidentiality and criminal and civil liability will be asserted.
Green Solution Technology Co.,LTD.
Rev.:2.1
1
Dec-09-2016
1 page  
3A Ultra Low Dropout Linear Regulator
GS7155NV
Electrical Characteristics
(VIN= VOUT+0.5V, VEN=VDD=5V, CIN=COUT=10uF, TA=TJ=25°C)
Parameter
Symbol
Conditions
Supply Voltage Section
VDD Operation Voltage
Range
VDD
VIN Operation Voltage
Range
VIN
Quiescent current
IQ
VDD Input current
Control Input Current
in Shutdown
VDD POR Threshold
VDD POR Hysteresis
VIN POR Threshold
VIN POR Hysteresis
Output Voltage
Reference Voltage
Output Voltage
Accuracy
Line Regulation (VDD)
Line Regulation (VIN)
Load Regulation
(Note 6)
VOUT Pull Low
Resistance
Dropout Voltage
IVDD
IVDD_SD
VDDRTH
VINRTH
VREF
△ VLINE_VDD
△ VLINE_IN
△ VLOAD
VDD Input Range, VOUT=VREF
VIN Input Range, VOUT=VREF
VDD=VIN=VEN=5V,IOUT=0A,
VOUT=VREF
VDD=VIN=VEN=5V, IOUT=0A,
VOUT=VREF
VDD=VIN=5.0V, IOUT=0A,
VEN=0V
IOUT=1mA, VOUT=VREF
VDD=4V to 5V, IOUT=1mA,
VOUT=VREF, VIN=2V
VIN=1.2V to 5V, IOUT=1mA,
VOUT=VREF
IOUT=1mA to 3A, VOUT=VREF
VDD=VIN=5.0V, VEN=0V
Dropout Voltage
(Note 7)
VDROP
VOUT=VREF, IOUT=2A
VOUT= VREF, IOUT=3A
Protection
Current Limit
Short Circuit Current
Thermal Shutdown
Temperature
ILIM
IFOLDBACK
TSD
VDD=VIN=VEN=5V, VOUT= VREF
VOUT<0.2V
TJ Rising
Min. Typ. Max. Units
3.0 5.5 V
1.0
Min{5.2
V,VDD}
V
1.0 1.5
mA
1.0 1.5
mA
0.1 2
2.4 2.7
3
0.15 0.2
0.55 0.75 0.95
0.13 0.20
uA
V
V
V
V
0.784 0.8 0.816
-2.0 +2.0
0.03 0.2
0.01 0.1
0.1 1.5
130
V
%
%
%
%
Ω
160 300
240 380
mV
mV
4A
100 mA
160 °C
Green Solution Technology Co.,LTD.
Rev.:2.1
5
Dec-09-2016
5 Page 
3A Ultra Low Dropout Linear Regulator
GS7155NV
Vout
FB
R1
R2
Vout
Coption
Cout
Figure 4 Feedback Network
COPTION can improve transient response, and
recommend value as follow:
VOUT
0.8V ~ 1.6V
1.6V ~ 2.4V
2.4V ~ 3.6V
R1
0 ~ 10 KΩ
10 KΩ ~ 20 KΩ
20 KΩ ~ 30 KΩ
COPTION
470pF~1nF
100pF~500pF
20pF~300pF
Input Capacitor selection
Bypass VIN to ground with a 10uF or greater
capacitor. Bypass VDD to ground with a 1uF
capacitor for normal operation in most appli-
cations. Ceramic, tantalum or aluminum elec-
trolytic capacitors may be selected for input
capacitor. However ceramic capacitors are
recommended due to their significant cost and
space savings. Place the capacitors physically as
close as possible to the device with wide and
direct PCB traces.
Power Dissipation and Layout Considerations
Although internal thermal limiting function is
integrated in GS7155NV, continuously keeping
the junction near the thermal shutdown
temperature may possibly affect device reliability.
For continuous operation, it is highly
recommended to keep the junction temperature
below the maximum operation junction
temperature 125°C for maximum reliability.
The power dissipation definition in device is:
PD = (VIN − VOUT) x IOUT + VDD x IQ
The maximum power dissipation can
be
calculated as:
PD(MAX) = ( TJ(MAX) − TA ) / θJA
Where TJ(MAX) is the maximum operation junction
temperature 125°C, TA is the ambient
temperature and the θJA is the junction to ambient
thermal resistance.
The thermal resistance θJA for PSOP-8 package
is 75°C/W on the standard JEDEC 51-7 (4 layers,
2S2P) thermal test board. The copper thickness
is 2oz. The maximum power dissipation at TA =
25°C can be calculated by following formula:
PD(MAX) = (125°C − 25°C) / (75°C/W) = 1.33W
(SOP-8 Exposed Pad on the minimum layout)
The thermal resistance θJA of PSOP-8 is
determined by the package design and the PCB
design. Copper plane under the exposed pad is
an effective heat sink and is useful for improving
thermal conductivity. As shown in Figure 3, the
amount of copper area to which the PSOP-8 is
mounted affects thermal performance. When
mounted to the standard PSOP-8 pad (Figure 5a),
θJA is 75°C/W. Adding copper area of pad under
the PSOP-8 Figure 5b) reduces the θJA to 54°C/W.
Even further, increasing the copper area of pad to
70mm2 (Figure 5c) reduces the θJA to 49°C/W.
Figure 5 (a) Minimum Footprint, JA = 75C/W
Green Solution Technology Co.,LTD.
Rev.:2.1
11
Dec-09-2016
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GS7155NV.PDF ] | |
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