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MIK108x series
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
1
DATA SHEET
17 D
ECEMBER
2003
N
O
. 00021
R
EV
1-03
CONTENTS
Page
DESCRIPTION
1
FEATURES
1
APPLICATIONS
1
BASIC FUNCTIONAL DIAGRAM
2
PIN DESCRIPTION
2
BLOCK DIAGRAM
2
ABSOLUTE MAXIMUM RATINGS
2
ELECTRICAL CHARACTERISTICS
3
TYPICAL CHARACTERISTICS
4
DROPOUT VOLTAGE
4
SHORT-CIRCUIT CURRENT
4
LOAD REGULATION
4
RIPPLE REJECTION
4
MINIMUM OPERATING CURRENT
4
TEMPERATURE STABILITY
4
ADJUST PIN CURRENT
4
RIPPLE REJECTION vs. CURRENT
5
LOAD TRANSIENT RESPONSE
5
LINE TRANSIENT RESPONSE
5
TYPICAL APPLICATIONS
6
CONTENTS
Page
1.2V TO 15V ADJUSTABLE REGULATOR
6
5V REGULATOR WITH SHUTDOWN
6
7.5A VARIABLE REGULATOR
6
REMOTE SENSING
6
HIGH EFFICIENCY REGULATOR WITH
SWITCHING PREREGULATOR
6
PARALLELING REGULATORS
6
IMPROVING RIPPLE REJECTION
6
APPLICATION INFORMATION
7
STABILITY
7
PROTECTION DIODES
7
OVERLOAD RECOVERY
7
PHYSICAL DIMENSIONS and MARKING
DIAGRAMS
9
TO-220-3
9
TO-263-3
9
ORDERING INFORMATION
10
RIPPLE REJECTION
8
OUTPUT VOLTAGE
8
LOAD REGULATION
8
THERMAL CONSIDERATIONS
8
DESCRIPTION
The MIK1083/MIK1084/MIK1085 series of positive
adjustable regulators are designed to provide
7.5A, 5A and 3A with higher efficiency than
currently available devices. All internal circuitry is
designed to operate down to 1V input to output
differential and the dropout voltage is fully
specified as a function of load current. Dropout is
guaranteed at a maximum of 1.5 V at maximum
output current. On-chip trimming adjusts the
reference voltage to 1%. Current limit is also
trimmed, minimizing the stress on both the
regulator and power source circuitry under
overload conditions.
The MIK1083/MIK1084/MIK1085 devices are pin
compatible with older 3 terminal regulators. A
10F output capacitor is required on these new
devices; however, this is usually included in most
regulator designs.
FEATURES
Three Terminal Adjustable
Output Current of 3A, 5A or 7.5A
Operates Down to 1V dropout
Guaranteed Dropout Voltage at Multiple Current
Levels
0.015% Line Regulation
0.1% Load Regulation
100% Thermal Limit Burn-In
APPLICATIONS
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Constant Current Regulators
Battery Chargers
REPLACEMENT OF:
LT108
X
SERIES
MIK108x series
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
2
Design by Vladimir F.Lityaghin / E-mail: lityaghin@mail.ru / Tel: +7(095)532-64-54
MI
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/www.
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to
ber
20
03
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
MIK108x series
MIK108x
CT
MIK108x
CS
1 -- ADJ
2 -- V
OUT
3 -- V
IN
tab -- V
OUT
TO-220-3
TO-263-3
!
!
!
!
V
IN
V
OUT
V
ADJ
THERMAL
LIMIT
!
!
!
PIN DESCRIPTION
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
BASIC FUNCTIONAL DIAGRAM
!
INPUT
OUTPUT
ADJUST
(
)
Substrate
1.25
Band Gap
!
!
!
2
1
3
tab
tab
2
1
3
SYMBOL
PARAMETER
MAXIMUM
UNIT
P
D
Power Dissipation
Internally Limited
W
V
IN
Input to Output Voltage Differential
30 V
Operating Junction Temperature Range
Control Section
0 to 125
T
J
Power Transistor
0 to 150
o
C
T
STG
Storage Temperature
-65 to 150
o
C
T
LEAD
Lead Temperature (Soldering, 10 sec)
300
o
C
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MIK108x series
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
3
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load
and line regulation are measured at a constant junction temperature by low duty cycle pulse
testing.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation (30W for the
MIK1083 /MIK1084 /MIK1085). 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 voltage range.
Note 3: I
FILL LOAD
is defined in the current limit curves. I
FILL LOAD
curve is defined as the minimum value of
current limit as a function of input to output voltage.
Note 4: Dropout voltage is specified over the full output current range of the device.
ELECTRICAL CHARACTERISTICS
(
T
HE
DENOTES
THE
SPECIFICATIONS
WHICH
APPLY
OVER
THE
FULL
OPERATING
TEMPERATURE
RANGE
,
OTHERWISE
SPECIFICATIONS
ARE
AT
T
A
= 25C)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
I
OUT
= 10mA,
(
V
IN
-
V
OUT
) = 3V
1.238 1.250 1.262
V
REF
Reference Voltage
10mA
I
OUT
I
FULL LOAD
1.5V (
V
IN
-
V
OUT
) 25V (Note 3)
1.225 1.250 1.270
V
0.015
0.2
I
LOAD
=10mA,
1.5 (
V
IN
-
V
OUT
) 15V
0.035
0.2
R
LINE
Line Regulation
15V (
V
IN
-
V
OUT
) 30V (Notes 1,2)
0.05 0.5
%
0.1
0.3
R
LOAD
Load Regulation
(
V
IN
-
V
OUT
) = 3V
10mA
I
OUT
I
FULL LOAD
(Notes 1,2,3)
0.2
0.4
%
V
DROP
Dropout Voltage
V
REF
=
1%,
I
OUT
=
I
FULL LOAD
(Note 4)
1.3
1.5
V
Current Limit
(
V
IN
-
V
OUT
) = 5V
8.0 9.5
MIK108
3
(
V
IN
-
V
OUT
) = 25V
0.4 1.0
(
V
IN
-
V
OUT
) = 5V
5.5 6.5
MIK108
4
(
V
IN
-
V
OUT
) = 25V
0.3 0.6
(
V
IN
-
V
OUT
) = 5V
3.2 4.0
V
REFCLIM
MIK108
5
(
V
IN
-
V
OUT
) = 25V
0.2
0.5
A
Minimum Load Current
(
V
IN
-
V
OUT
) = 25V
5 10
mA
Thermal Regulation
MIK108
3
0.002 0.010
MIK108
4
0.003 0.015
MIK108
5
T
A
= 25
C, 30ms pulse
0.004 0.020
%/W
RR
Ripple Rejection
f = 120Hz, C
ADJ
= 25F,
C
OUT
= 25F Tantalum,
I
OUT
=
I
FULL LOAD
,
(
V
IN
-
V
OUT
) = 3V
60 75 dB
55
I
ADJ
Adjust Pin Current
T
j
= 25
C
120
A
I
ADJCH
Adjust Pin Current Change 10mA I
OUT
I
FULL LOAD
,
1.5V (
V
IN
-
V
OUT
) = 25V
0.2 5 A
Temperature Stability
0.5 %
Long Term Stability
T
A
= 125
C, 1000Hrs
0.3 1 %
RMS Output Noise
(% of V
OUT
)
T
A
= 25
C, 10Hz
f 10kHz
0.003
%
4
Design by Vladimir F.Lityaghin / E-mail: lityaghin@mail.ru / Tel: +7(095)532-64-54
MI
KRON
JS
C
h
ttp
:
/
/www.
m
i
kr
o
n
.
r
u
02 Oc
to
ber
20
03
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
MIK108x series
TYPICAL CHARACTERISTICS
DROPOUT VOLTAGE
MIK108
3
MIK108
4
MIK108
5
SHORT-CIRCUIT CURRENT
MIK108
3
MIK108
4
MIK108
5
LOAD REGULATION
MIK108
3
MIK108
4
MIK108
5
RIPPLE REJECTION
MIK108
3
MIK108
4
MINIMUM OPERATING CURRENT
TEMPERATURE STABILITY
ADJUST PIN CURRENT
MIK108
5
M
I
N
I
M
U
M
I
N
PU
T/
O
U
TPU
T
D
I
FF
ER
EN
TI
A
L
(V)
OUTPUT CURRENT (A)
T
J
= 25C
0C 1
T
J
25C
1
2
0
1
2
3
4
5
6
7
8
9
10
M
I
N
I
M
U
M
I
N
PUT/
O
U
T
P
UT DI
F
F
ERE
N
TI
AL
(V)
OUTPUT CURRENT (A)
T
J
= 25C
0C 1
T
J
25C
1
2
0
1
2
3
4
5
6
M
I
NI
M
U
M
I
N
PUT/
OU
T
P
U
T
DI
F
F
EREN
T
I
AL
(V
)
OUTPUT CURRENT (A)
T
J
= 25C
0C 1
T
J
25C
1
2
0
1
2
3
4
INPUT/OUTPUT DIFFERENTIAL (V)
SHOR
T
-
CI
RCU
I
T
C
URRENT
(A
)
25C
I
FULL
LOAD
GUARANTEED
12
10
8
6
4
2
5
10
15
20
25
30
0
INPUT/OUTPUT DIFFERENTIAL (V)
S
H
ORT
-
CI
RCUI
T
CURRE
NT
(A
)
25C
I
FULL
LOAD
GUARANTEED
10
7
9
8
6
4
5
2
3
1
5
10
15
20
25
30
0
INPUT/OUTPUT DIFFERENTIAL (V)
S
H
O
R
T
-
CI
RCU
I
T
C
U
RRE
NT
(A
)
25C
I
FULL
LOAD
GUARANTEED
6
4
5
2
3
1
5
10
15
20
25
30
0
OU
T
P
U
T
V
O
L
T
A
GE
D
E
V
I
A
T
I
O
N
(%
)
TEMPERATURE (C)
I = 7.5A
-0.20
-0.15
-0.10
-0.05
0.05
0.10
0
25
-25
50
75
0
OUT
P
UT
VOL
T
AGE
DEV
I
A
T
I
O
N
(%
)
TEMPERATURE (C)
I = 5A
-0.20
-0.15
-0.10
-0.05
0.05
0.10
0
25
-25
50
75
0
OUT
P
U
T
V
O
L
T
A
GE
DEV
I
A
T
I
O
N
(%
)
TEMPERATURE (C)
I = 3A
-0.20
-0.15
-0.10
-0.05
0.05
0.10
0
25
-25
50
75
0
REF
E
REN
C
E V
O
L
T
A
G
E
(V
)
TEMPERATURE (C)
1.23
1.24
1.25
1.26
1.27
25
-25
50
75
0
INPUT/OUTPUT DIFFERENTIAL (V)
MI
NI
M
U
M
OPE
R
A
T
I
N
G
CUR
RENT
(m
A)
T
J
= 25C
1
2
3
4
5
6
7
8
9
10
5
10
15
20
25
30
0
AD
J
U
ST PI
N
CU
R
R
EN
T
(
A)
TEMPERATURE (C)
10
20
30
40
50
60
70
80
90
100
0
25
-25
50
75
0
RI
P
P
L
E
R
E
J
E
CT
I
O
N
(d
B
)
FREQUENCY (Hz)
10
20
30
40
50
60
70
80
90
100
0
10
100
1k
10k
100k
(
-
)
3V
V
V
IN
OUT
V
RIPPLE
0.5
V
P-P
V
RIPPLE
3V
P-P
(
-
)
V
V
IN
OUT
V
DROPOUT
C
ADJ
= 200F at Frequencies < 60Hz
C
I
ADJ
OUT
= 25F at Frequencies > 60Hz
= 7A
RI
PP
L
E
RE
J
E
CT
I
O
N
(d
B
)
FREQUENCY (Hz)
10
20
30
40
50
60
70
80
90
100
0
10
100
1k
10k
100k
(
-
)
3V
V
V
IN
OUT
V
RIPPLE
0.5
V
P-P
V
RIPPLE
3V
P-P
(
-
)
V
V
IN
OUT
V
DROPOUT
C
ADJ
= 200F at Frequencies < 60Hz
C
I
ADJ
OUT
= 25F at Frequencies > 60Hz
= 5A
RI
PPL
E REJ
E
CTI
O
N
(d
B
)
FREQUENCY (Hz)
10
20
30
40
50
60
70
80
90
100
0
10
100
1k
10k
100k
(
-
)
3V
V
V
IN
OUT
V
RIPPLE
0.5
V
P-P
V
RIPPLE
3V
P-P
(
-
)
V
V
IN
OUT
V
DROPOUT
C
ADJ
= 200F at Frequencies < 60Hz
C
I
ADJ
OUT
= 25F at Frequencies > 60Hz
= 3A
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3
MIK108x series
LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
5
TYPICAL CHARACTERISTICS
(CONTINUED)
RIPPLE REJECTION vs. CURRENT
MIK108
3
MIK108
4
MIK108
5
LOAD TRANSIENT RESPONSE
MIK108
3
MIK108
4
LINE TRANSIENT RESPONSE
MIK108
3
MIK108
4
MIK108
5
MIK108
5
RI
P
P
L
E
RE
J
E
CT
I
O
N
(d
B
)
OUTPUT CURRENT (A)
10
20
30
40
50
60
70
80
90
100
0
1
2
4
5
6
7
8
3
f
R
= 120Hz,
3
V
V
RIPPLE P-P
f
R
= 20kHz,
0.5
V
V
RIPPLE P-P
V
C
OUT
= 5V
25F
C
ADJ
OUT
= 25F
=
RIP
P
L
E
RE
J
E
C
T
IO
N
(d
B
)
OUTPUT CURRENT (A)
10
20
30
40
50
60
70
80
90
100
0
1
2
4
5
3
f
V
V
R RIPPLE
P-P
= 20kHz,
0.5
f
V
V
R RIPPLE
P-P
= 120Hz,
3
V
C
C
OUT
ADJ
OUT
= 5V
= 25F
= 25F
RI
PPL
E
R
E
J
E
CT
I
O
N
(d
B
)
OUTPUT CURRENT (A)
10
20
30
40
50
60
70
80
90
100
0
1.0
0.5
1.5
2.5
2.0
3.0
f
V
V
R RIPPLE
P-P
= 20kHz,
0.5
f
V
V
R RIPPLE
P-P
= 120Hz,
3
V
C
C
OUT
ADJ
OUT
= 5V
= 25F
= 25F
LO
AD
CURRE
N
T
(A
)
O
U
T
P
UT
V
O
L
T
AG
E
DE
VI
A
T
I
O
N
(m
V)
2
4
6
8
-0.4
-0.2
0.2
0.4
0.6
0
0
50 60 70 80 90 100
10 20 30 40
= 0
C
ADJ
= 1F
= 10F Tantalum
C
C
IN
OUT
= 1F
C
ADJ
V
V
OUT
IN
= 1 0V,
= 13V
= 100mA
PRELOAD
TIME (s)
LO
AD
CU
RRE
NT
(A
)
OU
T
P
U
T
V
O
L
T
A
GE
D
EVI
A
T
I
O
N
(mV
)
2
4
6
-0.4
-0.6
-0.2
0.2
0.4
0.6
0
0
50 60 70 80 90 100
10 20 30 40
= 0
C
ADJ
= 1F
= 10F Tantalum
C
C
IN
OUT
= 1F
C
ADJ
V
V
OUT
IN
= 1 0V,
= 13V
= 100mA
PRELOAD
TIME (s)
LO
A
D
C
URR
E
N
T
(A)
OUT
P
UT
V
O
L
T
AGE
DEVI
A
T
I
O
N
(m
V
)
1
2
3
-0.2
-0.3
-0.1
0.1
0.2
0.3
0
0
50 60 70 80 90 100
10 20 30 40
= 0
C
A DJ
= 1F
= 10F Tantalum
C
C
IN
OUT
= 1F
C
A DJ
V
V
OUT
IN
= 10V,
= 13V
= 100mA
PRELOAD
TIME (s)
IN
P
U
T
DE
V
I
A
T
I
O
N
(V
)
O
U
TP
UT
V
O
L
T
AG
E
DE
V
I
A
T
I
O
N
(m
V
)
12
13
14
-150
-100
-50
50
100
150
0
0
100 120 140 160 180
20 40 60 80
200
= 0
C
A D J
= 1F
C
A D J
V
OUT
= 10V
I
C
C
OUT
IN
IN
= 10F
= 0.2A
= 1F
TIME (s)
100 120 140 160 180
20 40 60 80
200
= 0
C
ADJ
= 1F
C
ADJ
V
OUT
= 10V
I
C
C
OUT
IN
IN
= 10F
= 0.2A
= 1F
TIME (s)
IN
P
U
T
DE
V
I
A
T
I
O
N
(V
)
O
U
T
P
UT
V
O
L
T
AG
E
D
EVI
A
T
I
O
N
(m
V
)
12
13
14
-60
-40
-20
20
40
60
0
0
100 120 140 160 180
20 40 60 80
200
= 0
C
A D J
= 1F
C
A D J
V
OUT
= 10V
I
C
C
OUT
IN
IN
= 10F
= 0.2A
= 1F
TIME (s)
IN
P
U
T
DE
V
I
A
T
I
O
N
(V
)
O
U
TP
UT
V
O
L
T
AG
E
D
EVI
A
T
I
O
N
(m
V)
12
13
14
-60
-40
-20
20
40
60
0
0
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