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MIK5203 series
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
1
DATA SHEET
19 August 2003
N
O
. 00014
R
EV
1-03
CONTENTS
Page
GENERAL DESCRIPTION
1
FEATURES
1
BLOCK DIAGRAM
2
PIN ASSIGNMENTS
2
TYPICAL APPLICATION CIRCUIT
2
FIXED VOLTAGE REGULATOR
2
ADJUSTABLE VOLTAGE REGULATOR
2
ABSOLUTE MAXIMUM RATINGS
2
ELECTRICAL CHARACTERISTICS
3
TYPICAL CHARACTERISTICS
4
DROPOUT VOLTAGE (V
IN
V
OUT
)
4
MINIMUM OPERATING CURRENT (ADJUSTABLE
DEVICE)
4
SHORT-CIRCUIT CURRENT
4
LOAD REGULATION
4
RIPPLE REJECTION
4
RIPPLE REJECTION VERSUS CURRENT
4
TEMPERATURE STABILITY
5
ADJUST PIN CURRENT
5
TYPICAL APPLICATIONS
5
1.2V TO 5.5V ADJUSTABLE REGULATOR
5
5V REGULATOR WITH SHUTDOWN
5
CONTENTS
Page
BATTERY CHARGER
5
IMPROVING RIPPLE REJECTION
5
LOW DROPOUT NEGATIVE SUPPLY
5
AUTOMATIC LIGHT CONTROL
5
ACTIVE TERMINATOR FOR SCSI-2 BUS
5
BATTERY BACKED UP REGULATED SUPPLY
5
HIGH EFFICIENCY DUAL SUPPLY
6
HIGH EFFICIENCY REGULATOR
6
APPLICATION INFORMATION
7
STABILITY
7
PROTECTIONS DIODES
7
OUTPUT VOLTAGE
7
LOAD REGULATION
7
RIPPLE REJECTION
7
PHYSICAL DIMENSIONS AND MARKING
DIAGRAMS
9
TO-220-3
9
TO-263-3
9
ORDERING INFORMATION
10
GENERAL DESCRIPTION
The MIK5203 is a positive low dropout regulator
designed to provide up to 3A of output current. The
device is available in an adjustable version and fixed
output voltages of 1.8V, 2.5V, 3.0V and 3.3V. All
internal circuitry is designed to operate down to 1V
input to output differential. Dropout voltage is
guaranteed at a maximum of 1.3V at 3A, decreasing
at lower load currents. On chip trimming adjusts the
reference/output voltage to within 1%.
The MIK5203 requires a minimum of 22F of output
capacitance for stability. Output capacitors of this
size or larger are normally included in most regulator
designs.
Unlike PNP type regulators where up to 10% of the
output current is wasted as quiescent current, the
quiescent current of the MIK5203 flows into the load,
increasing efficiency.
FEATURES
Adjustable or Fixed Output
Output Current of 3A
Low Dropout, 1.15V at 3A Output Current
0.04% Line Regulation
0.08% Load Regulation
100% Thermal Limit Burn-In
Fast Transient Response
REPLACEMENT
of
CS5203
MIK5203-xx series
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
2
Design by Vladimir F.Lityaghin / E-mail: lityaghin@mail.ru / Tel: +7(095)532-64-54
MI
KRON
JS
C
h
ttp:
/
/www.
mi
kr
o
n
.
r
u
19 A
u
gu
st
2003
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
MIK5203 series
BLOCK DIAGRAM
!
!
!
GND
ADJ
OUT
IN
FOR FIXED VOLTAGE DEVICE
THERMAL
LIMIT
"
"
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!
!
!
!
ABSOLUTE MAXIMUM RATINGS
TYPICAL APPLICATION CIRCUIT
FIXED VOLTAGE REGULATOR
NOTES:
C1 needed if device is far from filter capacitors
C2 minimum value required for stability
C1
C2
10F
22F
V
IN
> 4.75V
V
OUT
= 3.3V
V
IN
V
OUT
MIK5203-3.3
GND
TAB
!
2
!
3
!
1
!
!
!
!
!
PIN ASSIGNMENTS
MIK5203-xx
T
, MIK5203
T
TO-220-3
TAB
-- V
OUT
1 -- ADJ/GND
2 -- V
OUT
3 -- V
IN
MIK5203-xx
D2T
, MIK5203
D2T
TO-263-3
TAB
-- V
OUT
1 -- ADJ/GND
2 -- V
OUT
3 -- V
IN
TAB
2
1
3
TAB
TAB
C1
C2
R1
R2
232
1%
133
1%
10F
22F
V
IN
> 4.75V
V
OUT
= 3.45V
V
IN
V
OUT
MIK5203
ADJ
!
2
!
3
!
1
!
!
!
!
!
!
!
ADJUSTABLE VOLTAGE REGULATOR
(
)
2
1
1
2
R
I
V
V
ADJ
R
R
REF
OUT
+
+
=
2
1
3
NOTE:
Stresses above those listed under Absolute
Maximum Ratings may cause permanent
damage to the device. These are stress
ratings only and functional operation of the
device at these or any other conditions
above those indicated in the operation
sections of the specifications is not implied.
Exposure to Absolute Maximum Rating
conditions for extended periods may affect
device reliability.
SYMBOL
PARAMETER
MAXIMUM
UNIT
P
D
Power Dissipation
Internally Limited
W
V
IN
Input Voltage
7
V
Operating Junction Temperature Range
Control Section
0 to 125
T
J
Power Transistor
0 to 150
C
T
STG
Storage Temperature
-65 to 150
C
T
LEAD
Lead Temperature
Soldering, 10sec)
300
C
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MIK5203 series
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
3
The # denotes the specifications which apply over the full temperature range.
Note 1: For MIK5203 (adjustable) Vadj = 0V
Note 2: For the adjustable device the minimum load current is the minimum current required to maintain
regulation. Normally the current in the resistor divider used to set the output voltage is selected to
meet the minimum load current requirement.
Note 3: The specification represent the minimum input/output voltage required to maintain 1% regulation.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
LOAD
= 0 mA and T
J
= +25
C unless otherwise specified.
PARAMETER
DEVICE
TEST CONDITIONS
MIN
TYP
MAX UNIT
V
IN
= 2.75V, I
LOAD
= 10mA
1.238 1.250 1.262
Reference Voltage
(Note 1)
MIK5203
V
IN
= 2.7V to 12V, I
LOAD
= 10mA to 3A
#
1.230 1.250 1.270
V
V
IN
= 4.0V
1.485
1.500 1.515
MIK5203-1.5
V
IN
= 3.0V, I
LOAD
= 0mA to 3A
#
1.475 1.500 1.525
V
V
IN
= 4.3V
1.782 1.800 1.818
MIK5203-1.8
V
IN
= 3.3V, I
LOAD
= 0mA to 3A
#
1.771 1.800 1.829
V
V
IN
= 5.0V
2.475 2.500 2.525
MIK5203-2.5
V
IN
= 4.0V, I
LOAD
= 0mA to 3A
#
2.460 2.500 2.540
V
V
IN
= 5.35V
2.821 2.850 2.879
MIK5203-2.85
V
IN
= 4.40V, I
LOAD
= 0mA to 3A
#
2.805 2.850 2.895
V
V
IN
= 5.5V
2.970 3.000 3.030
MIK5203-3.0
V
IN
= 4.5V, I
LOAD
= 0mA to 3A
#
2.950 3.000 3.050
V
V
IN
= 5.8V
3.267 3.300 3.333
MIK5203-3.3
V
IN
= 4.8V, I
LOAD
= 0mA to 3A
#
3.247 3.300 3.353
V
V
IN
= 6.0V
3.465 3.500 3.535
MIK5203-3.5
V
IN
= 5.0V, I
LOAD
= 0mA to 3A
#
3.445 3.500 3.555
V
V
IN
= 7.5V
4.950 5.000 5.050
Output Voltage
MIK5203-5.0
V
IN
= 6.5V, I
LOAD
= 0mA to 3A
#
4.920 5.000 5.080
V
L
INE
R
EGULATION
(Note 1)
All
I
LOAD
= 10mA, (1.5V+ V
OUT
) V
IN
12V #
0.04
0.2 %
L
OAD
R
EGULATION
(Note 1)
All
V
IN
= V
OUT
+2.5V, I
LOAD
= 10mA to 3A
#
0.08
0.4 %
M
INIMUM
L
OAD
C
URRENT
(Note 1, 2)
MIK5203
V
IN
= 5V
#
1.7
5.0
mA
G
ROUND
P
IN
C
URRENT
MIK5203-
1.5 /1.8/2.5/
2.85/3.0/3.3/
3.5 /5.0
V
IN
= V
OUT
+2.5V, I
LOAD
= 10mA to 3A
#
5 10
mA
A
DJUST
P
IN
C
URRENT
(Note 1)
MIK5203
V
IN
= 2.75V, I
LOAD
= 10mA
#
50
120
A
C
URRENT
L
IMIT
(Note 1)
All (V
IN
- V
OUT
) = 3V
#
3 4 A
R
IPPLE
R
EJECTION
(Note 1)
All
V
IN
= V
OUT
+ 2.5V, I
LOAD
= 1.5A
60 75 dB
T
HERMAL
R
EGULATION
(Note 1)
MIK5203
T
A
= 25C, 30ms pulse
0.003
%/W
D
ROPOUT
V
OLTAGE
(Note 1, 3)
All
I
LOAD
= 10mA
I
LOAD
= 3A
#
1.00
1.15
1.15
1.30
V
4
Design by Vladimir F.Lityaghin / E-mail: lityaghin@mail.ru / Tel: +7(095)532-64-54
MI
KRON
JS
C
h
ttp:
/
/www.
mi
kr
o
n
.
r
u
19 A
u
gu
st
2003
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
MIK5203 series
TYPICAL CHARACTERISTICS
DROPOUT VOLTAGE (V
IN
V
OUT
)
MINIMUM OPERATING CURRENT
(A
DJUSTABLE
D
EVICE
)
SHORT-CIRCUIT CURRENT
LOAD REGULATION
RIPPLE REJECTION
RIPPLE REJECTION versus CURRENT
1.5
1.0
0.5
2.5
3.0
3.5
4.0
1
2
3
4
5
6
7
0
SHO
R
T
CI
RC
U
I
T
CU
RRE
N
T
(A
)
INPUT OUTPUT DIFFERENTIAL
/
(V)
T
J
= 125C
T
J
= 25C
I
LOAD
= 3A
0.10
0.05
-0.05
-0.10
-0.15
-0.20
25
50
75
100
125
0
0
OU
T
P
U
T
V
O
L
T
AG
E
D
E
V
I
A
T
I
O
N
(%
)
TEMPERATURE (C)
V
RIPPLE
3V
P-P
V
RIPPLE
0.5V
P-P
(
-
)
V V
IN
OUT
3V
(
-
)
V V
IN
OUT
V
DROPOUT
C
f
ADJ
= 200F at < 60Hz
C
f
I
ADJ
OUT
= 25F at > 60Hz
= 1.5A
10
20
30
40
50
60
70
80
90
100
10
100
1k
10k
100k
0
R
I
PPLE
R
E
J
E
C
T
I
O
N
(d
B
)
FREQUENCY (Hz)
V
RIPPLE
3V
P-P
f
RIPPLE
= 120Hz
f
RIPPLE
= 20kHz
V
RIPPLE
0.5V
P-P
V = 5V
= 25F
OUT
OUT
C
C
ADJ
= 25F
10
20
30
40
50
60
70
80
90
100
0.5
1.0
1.5
2.5
3.0
2.0
0
R
I
PPLE
R
E
J
E
C
T
I
O
N
(d
B
)
OUTPUT CURRENT (A)
T
J
= 125C
T
J
= 25C
T
J
= 0C
1
1
2
2
3
3
4
4
5
6
7
0
M
I
N
I
MU
M O
P
E
R
A
T
I
N
G
C
U
RRE
N
T
(m
A
)
INPUT OUTPUT DIFFERENTIAL
/
(V)
T
J
= 25C
T
J
= 125C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
3.0
0.5
1.0
1.5
2.0
2.5
0
DR
O
P
O
U
T V
O
L
T
A
G
E
(V
)
OUTPUT CURRENT (A)
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2003
MIK5203 series
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
5
ACTIVE TERMINATOR FOR SCSI-2 BUS
BATTERY BACKED UP REGULATED SUPPLY
1.2V to 5.5V ADJUSTABLE
REGULATOR
5V REGULATOR WITH SHUTDOWN
BATTERY CHARGER
* N
EEDED
IF
DEVICE
IS
FAR
FROM
FILTER
CAPACITOR
** V
OUT
= 1.25 x (1 + (R2/R1))
IMPROVING RIPPLE REJECTION
LOW DROPOUT NEGATIVE SUPPLY
AUTOMATIC LIGHT CONTROL
*C1
IMPROVES
RIPPLE
REJECTION
. X
C
SHOULD
BE
R1
AT
RIPPLE
FREQUENCY
TYPICAL APPLICATIONS
TYPICAL CHARACTERISTICS
(CONTINUED)
TEMPERATURE STABILITY
ADJUST PIN CURRENT
10
20
30
40
50
60
70
80
90
100
25
50
75
100
125
0
A
D
J
U
ST
P
I
N
CURRE
N
T
(
A
)
TEMPERATURE (C)
-2.0
-1.0
1.0
2.0
0
25
50
75
100
125
0
O
U
TP
UT
V
O
L
T
A
G
E
CHA
N
G
E
(%
)
TEMPERATURE (C)
MIK5203
V
IN
**
V
OUT
C1
*
10F
C2
100F
R2
470
R1
121
IN
OUT
ADJ
MIK5203
V
IN
TTL
5V
100F
121
1%
1k
1k
2N3904
10F
366
1%
IN
OUT
ADJ
MIK5203
1.25V
IN
V
IN
V
OUT
R
S
R1
OUT
IF
ADJ
+
-
+
-
=
R1
R2
R
R1
R2
V
IF
S
OUT
1
1
1.25V
+
-
=
R1
R2
R
V
IF
S
OUT
1
1
MIK5203
IN
OUT
ADJ
V
IN
V
IN
16.5V
10F
R2
350
1%
R1
121
1%
C1
10F
150F
V
IN
V
OUT
= -5V
FLOATING
INPUT
10F
100F
MIK5203
IN
OUT
ADJ
MIK5203-
2.85
IN
OUT
GND
18
t
o
27 l
i
n
e
s
4.75V
to
5.25V
110
110
110
110
22F
10F
V
IN
5.2V
5.0V
LINE
BATTERY
SELECT FOR
CHARGE RATE
6.5V
50
10F
10F
100F
MIK5203-
5.0
IN
OUT
GND
MIK5203-
5.0
IN
OUT
GND
MIK5203
10F
100F
1.2k
IN
OUT
ADJ
!
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