SECOS SSC2119

SSC2119
1.55A CMOS
Low Dropout Voltage Regulator
Elektronische Bauelemente
RoHS Compliant Product
Description
The SSC2119 positive,linear regulators feature low quiescent
current (45µA typ.) with low dropout voltage, making them ideal
for battery applications. Output voltage 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 SSC2119 is stable
with an output capacitance of 4.7µF or greater.
Features
* Low Temperature Coefficient
* Over-Temperature Shutdown
* Adjustable Version
* Very Low Dropout Voltage
* High Accurate ± 1.5%
* Guaranteed 1.55A output
* Current Limiting
* Power-Saving Shutdown Mode
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.
Applications
* PC Peripherals
* Wireless Devices
* Portable Electronics
* Battery Powered Widgets
* Instrumentation
Functional Block Diagram
Typical Application Circuit
SSC2119
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 1 of 7
SSC2119
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
Absolute Maximum Ratings
Parameter
Ratings
Symbol
Unit
Input Voltage
VIN
8
V
Output Current
IOUT
PD/(VIN-VO)
mA
Output Voltage
VOUT
Operating Ambient Temperature
Topr
Max. Junction Temperature
Power Dissipation (
o
C
mW
B
o
Electrical Characteristics Ta=25 C unless otherwise noted (V
Parameter
Symbol
1
Min.
-1.5%
Typ.
2
VOUT (T)
Output Voltage
VOUT (E)
Output Current
IO
1.55
_
Current Limit
ILIM
1.55
2.0
REGLOAD
-1
0.2
Load Regulation
VDROPOUT
Ground Oin Current
Line Regulation
C
o
810
PD
EDS Classification
Dropout Voltage
C
o
-40~+125
150
Tj Max.
T=100 C)
o
-40~+85
Tj
Junction Temperature
V
Gnd-0.3 to VIN+0.3
IGND
REGLINE
Input Voltage
Over Temperature Shutdown
VO>1.2V
A
VO>1.2V
_
1
_
_
_
_
600
45
_
_
%
1000
800
_
0.15
0.02
0.1
7
mV
uA
%
OTS
o
_
30
_
o
_
30
_
_
50
PSRR
_
20
_
15
_
eN
_
30
_
VEH
2
_
VEL
0
_
IEH
_
_
IEL
_
_
ISD
ADJ Input Bias Current
IADJ
VREF
_
VIN
0.4
0.1
0.5
_
30
_
0.5
2
_
1
1.223
1.242
2.0V<VOUT(T) ≤ 2.8V
Io=1.55A
Vo=VOUT(E)-2%
Io=1mA~ 1.5 A
Io=1mA
VOUT(T)< 2.0V
VIN=VOUT(T)+1
2.0V ≤ VOUT(T)
to VOUT(T)+2
V
C
C
ppm/ oC
_
_
Io=1mA~ 1.5 A
2.8V<VOUT(T)
_
3
IO =1mA
1.5V<VOUT(T) ≤ 2.0V
150
Shutdown Supply Current
ADJ Reference Voltage
V
A
_
_
TC
EN Input Bias Current
1.5%
_
Output Voltage
Temperature Coefficient
EN Input Threshold
Condition
Note
OTH
Output Voltage Noise
Unit
_
_
=VOUT(T)+2V,VEN=VIN )
Max.
VIN
Over Temperature Hystersis
Power Supply Rejection
_
_
IN
f=1kHz
dB
f=10kHz
f=100kHz
uVrms
V
uA
Io=100mA
Co=4.7uF
(ceramic)
f=10Hz~100kHz, Io=10mA
CO=4.7uF
VIN=2.7V to 7V
VIN=VEN, VIN=2.7V to 7V
VEN=0V, VIN=2.7V to 7V
uA
VIN=5V,VO=0V,VEN<VEL
VIN=2.5V,VO=0V,VEN<VEL
_
uA
VIN=5V,VADJ=1.242V
1.261
V
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+V DROPOUT
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 2 of 7
SSC2119
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
Ordering Information(contd.)
Part Number
SSC2119-AD
Marking
Output Voltage
9AAD2
XXXX
Adjustable
Part Number
Marking
Output Voltage
Detailed Description
The SSC2119 of COMS regulators contain 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
o
become active when the junction temperature exceeds140 C, or the current exceeds 2.2A. During thermal shutdown, the output voltage
remains low. Normal operation is restored when the junction temperature drops below 120oC.
External Capacitors
The SSC2118 is stable with an output capacitance to ground of 4.7uF 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 0.1uF ceramic capacitor with a
10uF 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 V IN. The input capacitor should be at least 0.1uF to have a beneficial effect. All capacitors should
placed in closed 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 1uA. 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
1.242 V 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 Ω will produce adequate stability, given reasonable layout precautions. To improve stability characteristics,
keep parasitic on the ADJ pin to min., and lower R1 and R2 values.
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 3 of 7
SSC2119
Elektronische Bauelemente
1.55A CMOS
Low Dropout Voltage Regulator
Characteristics Curve
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 4 of 7
SSC2119
Elektronische Bauelemente
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
1.55A CMOS
Low Dropout Voltage Regulator
Any changing of specification will not be informed individual
Page 5 of 7
SSC2119
Elektronische Bauelemente
ht tp://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
1.55A CMOS
Low Dropout Voltage Regulator
Any changing of specification will not be informed individual
Page 6 of 7
SSC2119
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
External Resistor Divider Table
R1(kΩ)
VOUT
1
2
1.30
21.41
1.35
11.50
1.40
1.45
5
10
20
50
R1(kΩ)
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(kΩ)=(1.242*R1(kΩ))/(VOUT-1.242)
2
5
10
20
50
R2(kΩ)=(1.242*R1(kΩ))/(VOUT-1.242)
Note: Small load (greater than 2mA) is necessary as R1 or R2 is larger than 50kΩ. Otherwise, output voltage probably can not be pulled
down to 0V on disable mode.
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 7of 7