GTM GSC2119

ISSUED DATE :2006/04/14
REVISED DATE :
G S C 2 11 9
1 . 5 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
Description
The GSC2119 of positive, linear regulators 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 GSC2119 is stable with an output capacitance of 4.7 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 1.55A output
Over-Temperature Shutdown
Current Limiting
Highly Accurate± 1.5%
Low Temperature Coefficient
Power-Saving Shutdown Mode
Adjustable Version
Functional Block Diagram
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
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.
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.
Typical Application Circuit
GSC2119
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ISSUED DATE :2006/04/14
REVISED DATE :
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Input Max Voltage
VIN
8
V
Output Current
IOUT
PD/( VIN- VO)
A
Output Voltage
VOUT
Gnd-0.3 to VIN+0.3
V
Operating Ambient Temperature
Topr
-40 ~ +85
Junction Temperature
Maximum Junction Temperature
Internal Power Dissipation( T=100 )
Tj
-40 ~ +125
Tj Max
150
PD
810
EDS Classification
Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25
Parameter
mW
B
unless otherwise
Condition
Output Voltage
Symbol
VOUT (E)
IO=1mA
-1.5%
Output Current
Current Limit
Load Regulation
IO
ILIM
REGLOAD
VOUT>1.2V
1.55
VOUT>1.2V
1.55
2.0
-
A
IO=1mA to 1.5A
-1
0.2
1
%
2.0V
-
-
1000
2.8V
-
-
800
-
-
600
-
45
-
VOUT(T)<2.0V
-
-
0.15
2.0V VOUT(T)
-
0.02
0.1
VIN
OTS
OTH
Note3
-
7
-
150
-
-
30
-
TC
-
30
-
ppm/
-
1
-
A
1.223
-
1.242
50
20
15
1.261
-
V
-
30
-
Vrms
2.0
-
VIN
V
VIN=2.7V to 7V
0
-
0.4
V
Dropout Voltage
(Note1)
VDROPOUT
1.5V<VOUT(T)
IO=1.55A
VO=VOUT(E)-2% 2.0V<VOUT(T)
Min
2.8V<VOUT(T)
Ground Pin Current
Line Regulation
Input Voltage
Over Temperature Shutdown
Over Temperature Hysterisis
Output Voltage
Temperature Coefficient
ADJ Input Bias Current
ADJ Reference Voltage
Power Supply Rejection
Output Voltage Noise
EN Input Threshold
EN Input Bias Current
Shutdown Supply Current
IGND
REGLINE
IADJ
VREF
PSRR
eN
VEH
VEL
IEH
IEL
ISD
IO=1mA~1.5A
IO=1mA
VIN=VOUT(T)+1 to
VOUT(T)+2
VIN=5V, VADJ=1.242V
Io=100mA
Co=4.7 F ceramic
f=1kHz
f=10kHz
f=100kHz
f=10Hz~100kHz
Co=4.7 F
Io=10mA
VIN=2.7V to 7V
TYP
VOUT(T)
(Note2)
-
Max
Unit
1.5%
V
-
A
mV
A
%
V
dB
VEN=VIN, VIN=2.7V to 7V
-
-
0.1
A
VEN= 0V, VIN=2.7V to 7V
-
-
0.5
A
VIN=5.0V, VO=0, VEN<VEL
-
30
-
A
VIN=2.5V, VO=0, VEN<VEL
-
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) =V OUT+VDROPOUT
GSC2119
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ISSUED DATE :2006/04/14
REVISED DATE :
Ordering Information ( contd. )
Part Number
GSC2119-AD
Marking
9AAD2
XXXX
Output Voltage
Part Number
Marking
Output Voltage
Adjustable
Detailed Description
The GSC2119 of COMS regulator contains a PMOS pass transistor, voltage reference, error amplifier, overcurrent 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 .
External Capacitors
The GSC2119 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.
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.
GSC2119
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ISSUED DATE :2006/04/14
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Characteristics Curve
GSC2119
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ISSUED DATE :2006/04/14
REVISED DATE :
115
85
55
25
-5
-45
GSC2119
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ISSUED DATE :2006/04/14
REVISED DATE :
GSC2119
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ISSUED DATE :2006/04/14
REVISED DATE :
External Resistor Divider Table
R1(k )
VOUT
1
2
1.30
21.41
1.35
11.50
1.40
1.45
5
10
20
50
R1(k )
VOUT
1
42.83 107.07 214.14 428.28 1070.7
3.20
0.63
1.27
3.17
6.34
12.69
31.72
23.00
57.50 115.00 230.00 575.00
3.25
0.62
1.24
3.09
6.19
12.37
30.93
7.86
15.72
39.30
78.61 157.22 393.04
3.30
0.60
1.21
3.02
6.03
12.07
30.17
5.97
11.94
29.86
59.71 119.42 298.56
3.35
0.59
1.18
2.95
5.89
11.78
29.46
1.50
4.81
9.63
24.07
48.14
96.28 240.70
3.40
0.58
1.15
2.88
5.76
11.51
28.78
1.55
4.03
8.06
20.16
40.32
80.65 201.62
3.45
0.56
1.13
2.81
5.63
11.25
28.13
1.60
3.47
6.94
17.35
34.69
68.39 173.46
3.50
0.55
1.10
2.75
5.50
11.00
27.50
1.65
3.04
6.09
15.22
30.44
60.88 152.21
3.55
0.54
1.08
2.69
5.38
10.76
26.91
1.70
2.71
5.42
13.56
27.12
54.24 135.59
3.60
0.53
1.05
2.63
5.27
10.53
26.34
1.75
2.44
4.89
12.22
24.45
48.90 122.24
3.65
0.52
1.03
2.58
5.16
10.32
25.79
1.80
2.23
4.45
11.13
22.26
44.52 111.29
3.70
0.51
1.01
2.53
5.05
10.11
25.26
1.85
2.04
4.09
10.21
20.43
40.86 102.14
3.75
0.50
0.99
2.48
4.95
9.90
24.76
1.90
1.89
3.78
9.44
18.88
37.75
94.38
3.80
0.49
0.97
2.43
4.86
9.71
24.28
1.95
1.75
3.51
8.77
17.54
35.08
87.71
3.85
0.48
0.95
2.38
4.76
9.52
23.81
2.00
1.64
3.28
8.19
16.39
32.77
81.93
3.90
0.47
0.93
2.34
4.67
9.35
23.36
2.05
1.54
3.07
7.69
15.37
30.74
76.86
3.95
0.46
0.92
2.29
4.59
9.17
22.93
2.10
1.45
2.90
7.24
14.48
28.95
72.38
4.00
0.45
0.90
2.25
4.50
9.01
22.52
2.15
1.37
2.74
6.84
13.68
27.36
68.39
4.05
0.44
0.88
2.21
4.42
8.85
22.12
2.20
1.30
2.59
6.48
12.96
25.93
64.82
4.10
0.43
0.87
2.17
4.35
8.69
21.73
2.25
1.23
2.46
6.16
12.32
24.65
61.61
4.15
0.43
0.85
2.14
4.27
8.54
21.35
2.30
1.17
2.35
5.87
11.74
23.48
58.70
4.20
0.42
0.84
2.10
4.20
8.40
20.99
2.35
1.12
2.24
5.60
11.21
22.42
56.05
4.25
0.41
0.83
2.06
4.13
8.26
20.64
2.40
1.07
2.15
5.36
10.73
21.45
53.63
4.30
0.41
0.81
2.03
4.06
8.12
20.31
2.45
1.03
2.06
5.14
10.28
20.56
51.41
4.35
0.40
0.80
2.00
4.00
7.99
19.98
2.50
0.99
1.97
4.94
9.87
19.75
49.36
4.40
0.39
0.79
1.97
3.93
7.87
19.66
2.55
0.95
1.90
4.75
9.50
18.99
47.48
4.45
0.39
0.77
1.94
3.87
7.74
19.36
2.60
0.91
1.83
4.57
9.15
18.29
45.73
4.50
0.38
0.76
1.91
3.81
7.62
19.06
2.65
0.88
1.76
4.41
8.82
17.64
44.11
4.55
0.38
0.75
1.88
3.75
7.51
18.77
2.70
0.85
1.70
4.26
8.52
17.04
42.59
4.60
0.37
0.74
1.85
3.70
7.40
18.49
2.75
0.82
1.65
4.12
8.24
16.47
41.18
4.65
0.36
0.73
1.82
3.64
7.29
18.22
2.80
0.80
1.59
3.99
7.97
15.94
39.86
4.70
0.36
0.72
1.80
3.59
7.18
17.96
2.85
0.77
1.54
3.86
7.72
15.45
38.62
4.75
0.35
0.71
1.77
3.54
7.08
17.70
2.90
0.75
1.50
3.75
7.49
14.98
37.45
4.80
0.35
0.70
1.75
3.49
6.98
17.45
2.95
0.73
1.45
3.64
7.27
14.54
36.36
4.85
0.34
0.69
1.72
3.44
6.88
17.21
3.00
0.71
1.41
3.53
7.06
14.13
35.32
4.90
0.34
0.68
1.70
3.40
6.79
16.98
3.05
0.69
1.37
3.43
6.87
13.74
34.35
4.95
0.33
0.67
1.67
3.35
6.70
16.75
3.10
0.67
1.34
3.34
6.68
13.37
33.42
5.00
0.33
0.66
1.65
3.30
6.61
16.52
3.15
0.65
1.30
3.25
6.51
13.02
32.55
R2(k )=(1.242*R1(k ))/(VOUT-1.242)
2
5
10
20
50
R2(k )=(1.242*R1(k ))/(VOUT-1.242)
Note: Small load (greater than 2mA) is necessary as R1 or R2 is larger than 50k . Otherwise, output voltage probably can not be pulled
down to 0V on disable mode.
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
GSC2119
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