ETL GSC1118-90 1a positive low dropout fixed-mode regulator with en function Datasheet

ISSUED DATE :2005/07/11
REVISED DATE :2005/10/04B
G S C 111 8
1A Positive Low Dropout Fixed-mode Regulator With EN Function
Description
The GSC1118 is a low dropout positive fixed-mode regulator with minimum of 1A output current capability. The product is specifically
designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic
supply. GSC1118 is also well suited for other applications such as VGA cards. The product is guaranteed to have <1.4V dropout at full load
current making it ideal to provide well regulated outputs 1.5V to 12V with up to 18V input supply. The product offers a TTL-Logic
compatible enable pin.
Features
1.4V maximum dropout voltage at full load current
Built-in thermal shutdown
Output current limiting
Fixed output voltage 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, 9.0V, 12V
Fast transient response
Good noise rejection
Enable function
Applications
PC peripheral
Communication
CDROM..
Package Dimensions
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.
Millimeter
Min.
Max.
M
H
L
J
K
G
0.10
0.25
0.35
0.49
1.35
1.75
0.375 REF.
45
1.27 TYP.
Typical Circuit
GSC1118
Page: 1/3
ISSUED DATE :2005/07/11
REVISED DATE :2005/10/04B
Pin Descriptions
Name
GND
VOUT
Description
Ground
The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability.
VIN
The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input
voltage does not sag below the minimum dropout voltage during the load transient response .This pin must always be 1.3V
higher than V OUT in order for the device to regulate properly.
EN
This input pin of regulator. TTL/CMOS compatible input Logic high= disable output, Logic Low or open= output enable.
( internal pull-down resistor~100K).
NC
No connection.
Absolute Maximum Ratings
Symbol
VIN
VEN
PD
TST
TOP
Parameter
DC Supply Voltage
Enable Pin Voltage
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Ratings
Unit
-0.3 to 18
7
Internally Limited
-65 ~ + 150
0 ~ + 150
V
V
Electrical Characteristics (Under operating Conditions)
Parameter
Output Voltage
Line Regulator
Load Regulation
Dropout Voltage
(VIN-VOUT)
Current Limit
Minimum Load Current
Enable Input Voltage
VEN
Enable Input Current
IEN
Thermal Regulation
Ripple Rejection
Conditions
GSC1118-15
GSC1118-18
GSC1118-25
GSC1118-33
GSC1118-50
GSC1118-90
GSC1118-12
GSC1118-XX
GSC1118-15
GSC1118-18
GSC1118-25
GSC1118-33
GSC1118-50
GSC1118-90
GSC1118-12
Io=10mA, TJ =25 , 3.0V VIN 15V
Io=10mA, TJ =25 , 3.3V VIN 15V
Io=10mA, TJ =25 , 4.0V VIN 15V
Io=10mA, TJ =25 , 4.8V VIN 15V
Io=10mA, TJ =25 , 6.5V VIN 15V
Io=10mA, TJ =25 , 10.5V VIN 18
Io=10mA, TJ =25 , 13.5V VIN 18V
Io=10mA, TJ =25 , VOUT +1.5< VIN <18V
VIN=3.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=3.3V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=4.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=5.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=8.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=12.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
VIN=15.0V, 0mA<Io<1A, TJ=25 , (Note 1, 2)
GSC1118-XX
Io=1A, VOUT =0.1 VOUT
GSC1118-XX
(VIN-VOUT)=5V
GSC1118-XX
0
TJ 125
Logic Low (ON)
Logic High (OFF)
VEN=0.8V
VEN=2.0V
TA=25 , 30ms pulse
F=120Hz, COUT =25uF, Tantalum, Io=1A
GSC1118-XX
VIN=VOUT +3V
Io=10mA
Temperature Stability
JA Thermal Resistance
Junction–to-Ambient
(No heat sink ;No air flow)
JC Thermal Resistance
Control Circuitry/Power Transistor
Junction-to-Case
Min
Typ
Max Unit
1.470
1.764
2.450
3.235
4.900
8.820
11.760
-
1.500
1.800
2.500
3.300
5.000
9.000
12.00
0-
1.530
1.836
2.550
3.365
5.100
9.180
12.24
0
0.2
12
15
20
26
40
70
100
15
18
25
33
50
90
120
V
V
V
V
V
V
V
%
mV
mV
mV
mV
mV
mV
%
-
1.3
1.4
V
1.1
1.6
-
5
0.008
10
0.8
10
80
0.04
A
mA
%/W
-
60
0.5
70
-
dB
%
-
150
-
/W
-
25
-
/W
V
A
Note 1: See thermal regulation specifications for charges in output voltage due to heating effects. Line and load regulation are measured
at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead=1/8” from the
package.
Note 2: Line and load regulations are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the
input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full
input/output range
Note 3: Quiescent current is defined as the minimum output current required to maintain regulation. At 12V input/output differential the
device is guaranteed to regulate if the output current is greater than 10mA.
GSC1118
Page: 2/3
ISSUED DATE :2005/07/11
REVISED DATE :2005/10/04B
Typical Performance Characteristics
I load=800mA
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.
GTM reserves the right to make changes to its products without notice.
GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.
GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.
TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785
China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China
TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165
GSC1118
Page: 3/3
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