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VOLTAGE REGULATOR. GSC2118 Datasheet

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VOLTAGE REGULATOR. GSC2118 Datasheet






GSC2118 REGULATOR. Datasheet pdf. Equivalent




GSC2118 REGULATOR. Datasheet pdf. Equivalent





Part

GSC2118

Description

CMOS LOW DROPOUT VOLTAGE REGULATOR



Feature


www.DataSheet4U.com ISSUED DATE :2006/04 /13 REVISED DATE : G S C 2 11 8 Descri ption 1 . 5 A C M O S L o w D r o p o u t Vo l t a g e R e g u l a t o r The GSC2118 of positive, linear regulator feature low ground current (45 A typ.) with low dropout voltage, making them i deal for battery applications. Output v oltages are set at the factory and trim med to 1.5% accura.
Manufacture

GTM

Datasheet
Download GSC2118 Datasheet


GTM GSC2118

GSC2118; cy. These rugged devices have both Therm al Shutdown, and Current Fold-back to p revent device failure under the “Wors t” of operating conditions. The GSC21 18 is stable with an output capacitance of 4.7 F or greater. Features Applic ations Very Low Dropout Voltage Guaran teed 1.5A output Over-Temperature Shutd own Current Limiting Short Circuit Curr ent Fold-back Highly A.


GTM GSC2118

ccurate± 1.5% Low Temperature Coefficie nt Power-Saving Shutdown Mode Adjustabl e Version Functional Block Diagram Pa ckage Dimensions Battery Powered Widge ts Instrumentation Wireless Devices PC Peripherals Portable Electronics REF. A B C D E F Millimeter Min. Max. 5.80 4.80 3.80 0° 0.40 0.19 6.20 5.00 4.00 8° 0.90 0.25 REF. M H L J K G Millim eter Min. Max. 0.10 0.


GTM GSC2118

.25 0.35 0.49 1.35 1.75 0.375 REF. 45° 1.27 TYP. Typical Application Circuit GSC2118 Page: 1/7 ISSUED DATE :2006/ 04/13 REVISED DATE : Absolute Maximum Ratings Parameter Input Max Voltage Out put Current Output Voltage Operating Am bient Temperature Junction Temperature Maximum Junction Temperature Internal P ower Dissipation( EDS Classification T= 100 ) Symbol VIN I.

Part

GSC2118

Description

CMOS LOW DROPOUT VOLTAGE REGULATOR



Feature


www.DataSheet4U.com ISSUED DATE :2006/04 /13 REVISED DATE : G S C 2 11 8 Descri ption 1 . 5 A C M O S L o w D r o p o u t Vo l t a g e R e g u l a t o r The GSC2118 of positive, linear regulator feature low ground current (45 A typ.) with low dropout voltage, making them i deal for battery applications. Output v oltages are set at the factory and trim med to 1.5% accura.
Manufacture

GTM

Datasheet
Download GSC2118 Datasheet




 GSC2118
www.DataSheet4U.com
ISSUED DATE :2006/04/13
REVISED DATE :
GSC2118
1. 5 A CMOS Low Dropou t Vol tag e Regu lato r
Description
The GSC2118 of positive, linear regulator feature low ground current (45 A typ.) with low dropout voltage,
making them ideal for battery applications.
Output voltages are set at the factory and trimmed to 1.5% accuracy.
These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under
the “Worst” of operating conditions.
The GSC2118 is stable with an output capacitance of 4.7 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 1.5A output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Highly Accurate± 1.5%
Low Temperature Coefficient
Power-Saving Shutdown Mode
Adjustable Version
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Package Dimensions
Functional Block Diagram
Typical Application Circuit
REF.
A
B
C
D
E
F
Millimeter
Min. Max.
5.80
6.20
4.80
5.00
3.80
4.00
0° 8°
0.40
0.90
0.19
0.25
REF.
M
H
L
J
K
G
Millimeter
Min. Max.
0.10
0.25
0.35
0.49
1.35
1.75
0.375 REF.
45°
1.27 TYP.
GSC2118
Page: 1/7




 GSC2118
ISSUED DATE :2006/04/13
REVISED DATE :
Absolute Maximum Ratings
Parameter
Input Max Voltage
Symbol
VIN
Ratings
8
Unit
V
Output Current
Output Voltage
Operating Ambient Temperature
IOUT
VOUT
Topr
PD/( VIN- VO)
Gnd-0.3 to VIN+0.3
-40 ~ +85
A
V
Junction Temperature
Tj -40 ~ +125
Maximum Junction Temperature
Internal Power Dissipation( T=100 )
Tj Max
PD
150
810
mW
EDS Classification
B
Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25 unless otherwise
Parameter
Output Voltage
Output Current
Symbol
VOUT(E)
(Note1)
IO
Condition
VEN=VEHmin, IO=1mA
VOUT>1.2V
Min
-1.5%
1.5
Typ
VOUT(T)
(Note2)
-
Max
1.5%
-
Unit
V
A
Current Limit
ILIM
VOUT>1.2V
1.5 2.0
-
A
Load Regulation
Dropout Voltage
REGLOAD
VDROPOUT
IO=1mA to 1.5A
IO=1.5A
VO=VOUT(E)-2%
1.5V<VOUT(T) 2.0V
2.0V<VOUT(T) 2.8V
2.8V<VOUT(T)
-1
-
-
-
0.2 1
- 1300
- 800
- 600
%
mV
Ground Pin Current
IGND
IO=1mA~1.5A
- 45 -
A
Line Regulation
REGLINE
IO=1mA
VOUT(T)<2.0V
VIN=VOUT(T)+1 to 2.0V VOUT(T)<4.0V
VOUT(T)+2
4.0V VOUT(T)
-0.15
-0.1
-0.4
-
0.02
-
0.15
0.1
0.4
%
Input Voltage
Over Temperature Shutdown
VIN
OTS
Note3
-
-
150
7
-
V
Over Temperature Hysterisis
Output Voltage
Temperature Coefficient
Short Circuit Current
ADJ Input Bias Current
Minimum Load Current
ADJ Reference Voltage
OTH
TC
ISC
IADJ
IMin
VREF
VOUT<0.4V
VIN=5V, VADJ=1.242V
-
-
-
-
1
1.223
30
30
750
1
-
1.242
-
-
-
-
-
1.261
ppm/
mA
A
mA
V
Power Supply Rejection
Output Voltage Noise
EN Input Threshold
EN Input Bias Current
PSRR
eN
VEH
VEL
IEH
IEL
Io=100mA
Co=4.7 F ceramic
f=1kHz
f=10kHz
f=10Hz~100kHz
Io=10mA,
Co=4.7 F
VIN=2.7V to 7V
VIN=2.7V to 7V
VIN=7V
VEN= 0V, VIN=7V
- 50 -
- 20 -
dB
- 30 - Vrms
2.0 - VIN
V
0
- 0.4
V
- - 0.1 A
- - 0.5 A
Shutdown Supply Current
ISD
VIN=5V, VOUT=0V, VEN=0V
- 0.5 2
A
Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT (T) + 2.0V” is provided at the VIN pin while maintaining a
certain IOUT value).
2: VOUT (T) =Specified Output Voltage
3: VIN (MIN) =VOUT+VDROPOUT
GSC2118
Page: 2/7




 GSC2118
ISSUED DATE :2006/04/13
REVISED DATE :
Ordering Information ( contd. )
Part Number
GSC2118-AD
Marking
8AAD2
XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
Detailed Description
The GSC2118 of COMS regulator contains a PMOS pass transistor, voltage reference, error amplifier, over-
current protection, and thermal shutdown.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision
reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
140 , or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GSC2118 behaves like a current source when the load reaches 2.2A. However, if the load impedance
drops below 0.3 , the current drops back to 600mA to prevent excessive power dissipation. Normal operation
is restored when the load resistance exceeds 0.75 .
External Capacitors
The GSC2118 is stable with an output capacitance to ground of 4.7 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are
comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10 F Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should
be at least 0.1 F to have a beneficial effect.
All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This
can be achieved with a “Star” connection.
Enable
When pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state,
the quiescent current is less than 1 A. This pin behaves much like an electronic switch.
100k resistor is necessary between VEN source and EN pin when VEN is higher than VIN.
(Note: there is no internal pull-up for EN PIN)
Adjustable Version
The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to
5.0V. Vadj is trimmed to 1.242V and Vout is given by the equation:
VOUT=Vadj * (1+R1/R2)
Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1+R2 will
reduce stability. In general, R1 and R2 in the 10’s of k will produce adequate stability, given reasonable
layout precautions. To improve stability characteristics, keep parasitic on the ADJ pin to minimum, and lower
R1 and R2 values.
GSC2118
Page: 3/7






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