SECOS S5U2189

S5U2189
1.55A CMOS
Low Dropout Voltage Regulator
Elektronische Bauelemente
RoHS Compliant Product
Description
The S5U2189 of 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 S5U2189 is stable
with an output capacitance of 4.7µF or greater.
Features
REF.
* Low Temperature Coefficient
* Over-Temperature Shutdown
* Adjustable Version
* Very Low Dropout Voltage
* High Accurate ± 1.5%
A
b
L4
c
L1
E
Millimeter
Min.
Max.
4.40
4.80
0.66
0.91
0.00
0.30
0.36
0.5
2.29
2.79
9.80
10.4
REF.
c2
L2
e
L
Millimeter
Min.
Max.
1.25
1.45
1.27 REF.
8.6
9.0
1.70 REF.
14.6
15.8
0˚
8˚
* Guaranteed 1.55 A output
* Current Limiting
* Power-Saving Shutdown Mode
Applications
* PC Peripherals
* Wireless Devices
* Portable Electronics
* Battery Powered Widgets
* Instrumentation
Functional Block Diagram
Typical Application Circuit
S5U2189
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 1 of 7
S5U2189
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
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
Tj
-40 ~ +125
Tj Max
150
Junction Temperature
Maximum Junction Temperature
Thermal Resistance
Internal Power Dissipation(
T=100 )
jc
5
PD
3.0
EDS Classification
B
Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25
Parameter
Condition
Output Voltage
Symbol
VOUT (E)
Output Current
Current Limit
Load Regulation
IO
ILIM
REGLOAD
Dropout Voltage
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
/W
W
(Note1)
VDROPOUT
unless otherwise
Min
TYP
Max
Unit
IO=1mA
-1.5%
VOUT(T)
1.5%
V
VOUT>1.2V
1.55
-
-
A
VOUT>1.2V
1.55
2.0
-
A
IO=1mA to 1.5A
-1
0.2
1
%
2.0V
-
-
1000
2.8V
1.5V<VOUT(T)
IO=1.55A
VO=VOUT(E)-2% 2.0V<VOUT(T)
(Note2)
mV
-
-
800
2.8V<VOUT(T)
-
-
600
IO=1mA~1.5A
(T)+1
to
IO=1mA
VOUT(T)<2.0V
VIN=VOUT (T)+1 to
2.0V VOUT(T)
VOUT(T)+2
-
45
-
-
-
0.15
-
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
IGND
REGLINE
IADJ
VREF
PSRR
eN
VEH
VEL
IEH
IEL
ISD
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
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
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 2 of 7
S5U2189
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
Ordering Information(contd.)
Part Number
Marking
Output Voltage
9HAD2
XXXX
Adjustable
S5U 2189-AD
Part Number
Marking
Output Voltage
Detailed Description
The S5U2189 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 S5U2189 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.
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 3 of 7
S5U2189
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
S5U2189
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
S5U2189
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
S5U2189
1.55A CMOS
Elektronische Bauelemente
Low Dropout Voltage Regulator
External Resistor Divider Table
R1(k Ω)
VOUT
1
2
1.30
21.41
1.35
11.50
1.40
1.45
5
10
20
50
R1(k Ω)
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(k Ω))/(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 7 of 7