Replacement of
LP2931-XX/LP2931
MIK2931-XX/MIK2951-XX
100 mA Low Dropout
Positive Voltage Regulator
January 1999- revised October 1999
Description
This series of fixed-voltage and adjustable monolithic micropower voltage regulators is designed for a wide range of applications. This
device excellent choice for use in battery-powered application. Furthermore, the quiescent current increases only slightly at dropout, which
prolongs battery life. This series of fixed-voltage and adjustable regulators features very low quiescent current (100A Typ.) and very low
drop output voltage (Typ. 60mV at light load and 300mV at 100mA). This includes a tight initial tolerance of 0.5% typ., extremely good load
and line regulation of 0.05% typ., and very low output temperature coefficient. This series of fixed-voltage and adjustable regulators is
offered in 3-pin TO-92 package (TO-220-5, SO-8 for MIK2931) compatible with other fixed-voltage regulators.
Features
3-Terminal regulators (TO-220-5, SO-8 for MIK2931)
100mA output within 2% over temperature
Very low quiescent current
Low dropout voltage (300mV Typ)
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Unregulated DC input can withstand -20V reverse battery
and +60V positive transients
Pin Connection MIK2931
1
8
3
6
4
5
input
output
GND
GND
GND
GND
shutdown
feedback
2
7
MIK2931
Top View
Applications
High-efficiency linear regulator
Battery powered systems
Portable/Palm top/Notebook computers
Portable consumer equipment
Portable Instrumentation
Automotive Electronics
SMPS Post-Regulator
Package information
Bottom view
TO-92 Plastic Package
Top view
TO-220
Device Selection Guide
Device Voltage
output
MIK2931-3.3 3.3V
*
MIK2931-5.0 5.0V
MIK2931-8.0 8.0V
MIK2931-8.5 8.5V
MIK2931-9.0 9.0V
MIK2931-10 10.0V
MIK2931-12 12.0V
MIK2931-15 15.0V
MIK2931
3.0V to 24.0V
*- other fixed versions are also available Vout = 2.0V to 5.0V
Absolute Maximum Ratings
Parameter Maximum
Units
Power Dissipation
Internally Limited
W
Lead Temperature (Soldering, 5 seconds)
260
Storage Temperature Range
-65 to+150
Operating Junction Temperature Range
-55 to +150
C
Input Supply Voltage
-20 to +35
V
Page 1 of 3
Replacement of
LP2931-XX/LP2931
MIK2931-XX/MIK2951-XX
100 mA Low Dropout
Positive Voltage Regulator
January 1999- revised October 1999
Electrical Characteristics
(T
j
= 25
o
C, I
0
=100A, V
IN
= 14V (for MIK2931-15 V
IN
= 16V), C
O
=100F; unless otherwise noted)
Parameter Conditions
Min
Typ
Max
Units
Output Voltage
(Fixed Model)
-25
CT
J
85C
Full Operating Temperature
0.985|V
O
|
0.98|V
O
|
V
0
1.015|V
0
|
1.02|V
0
|
Output Voltage (Fixed Model)
100A
I
L
100mA, T
J
T
JMAX
0.975|V
O
| V
0
1.025|V
0
|
Input Supply Voltage
26
V
Output Voltage Temperature Coefficient
(Note 1)
50
150
ppm/
C
Line Regulation (Note 2)
13V
Vin
26V (Note 3)
0.1
0.4 %
Load Regulation (Note 2)
1mA
I
L
100mA
0.1
0.3 %
Dropout Voltage (Note 4)
I
L
=10 mA
I
L
=100 mA
60
300
200
600
mV
Ground Current (Note 5)
I
L
=100 A
I
L
=10 mA
I
L
=100 mA
100
0.9
8
150
1.5
12
A
mA
Dropout Ground Current(Note 5)
Vin= Vout -0.5V, I
L
=100 A
110
170
A
Current Limit
Vout=0
160
200
mA
Thermal Regulation (Note 6)
0.05
0.2
%/W
Output Noise, 10Hz to 100KHz
I
L
=10 mA
C
L
=2.2F
C
L
=3.3F
C
L
=33F
500
350
120
V
RMS
Ripple Rejection Ratio
I
0
=10mA, f = 120Hz, C
O
=100F, Vin
= V
0
+ 3V+2Vpp
60 dB
TO-220-5, SO-8 Versions only
Reference Voltage
1.21
1.235
1.26
Reference Voltage
Over Temperature (Note 7)
1.185
1.285
V
Feedback Pin Bias Current
20
40
nA
Reference Voltage Temperature Coefficient
(Note 1)
50
ppm/
C
Feedback Pin Bias Current Temperature
Coefficient
0.1
nA/
C
Shutdown Input
Input Logic Voltage
Low (Regulator ON)
High (Regulator OFF)
2
1.3 0.7 V
Shutdown Pin Input Current
V
S
=2.4V
V
S
=26V
30
450
50
600
(Note 8)
5.0V
V
OUT
15.0 V
10
3.3V
V
OUT
< 5.0 V
20
Regulator Output Current in Shutdown
2.0V
V
OUT
< 3.3 V
30
A
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature
range.
Note 2: Regulations is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due
to heating effects are covered under the specification for thermal regulation.
Note 3: Line regulation is tested at 150
C for I
L
= 1mA. For I
L
= 100A and T
J
= 125
C, line regulation is guaranteed by design to 0.2%. For
MIK2931-15 16V
Vin 26V.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured
at 1V differential.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the ground pin current
and output load current.
Note 6: Thermal regulation is the change in output voltage at a time T after a change in power dissipation, excluding load or line regulation
effects. Specifications are for a 50 mA load pulse (1.25W) for T = 10ms
Note 7: Vref
Vout (Vin - 1V), 2.3V Vin 26V, 100A I
L
100mA, T
J
T
JMAX
Note 8: Vshutdown
2V, Vin 26V, Vout = 0V.
Page 2 of 3
Replacement of
LP2931-XX/LP2931
MIK2931-XX/MIK2951-XX
100 mA Low Dropout
Positive Voltage Regulator
January 1999- revised October 1999
Block Diagram and Typical Applications
Figure 1. Fixed Regulator (MIK2931-5.0)
Figure 2. Adjustable Regulator (MIK2931)
Pad Location MIK2931
(For MIK2931-XX fixed versions see Note 1)
Chip Size: 1.87 x 1.44 mm
Pad Location Coordinates
Coordinates (
m)
Pad N
Pad Name
X
Y
1 Output 110
95
2 Input 110 1220
3 GND 955
525
4 Shutdown 1655
1225
5 Feedback 1655
95
Note 1: For MIK2931-XX (3 pin)
2 connected to Input
1, 5 connected to Output
3 connected to GND
Page 3 of 3
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