Low Dropout
Voltage Regulators
CORPORATION
CLM2931
FEATURES
PRODUCT DESCRIPTION
The CLM2931 is a positive low power voltage regulator. This
device is an excellent choice for use in battery-powered
applications such as cordless telephones, radio control
systems, and portable computers. The CLM2931 features very
low quiescent current (0.4mA) and very low drop output voltage
(typ. 50mV at light load and 300mV at 100mA). other features
include the logic-compatible on/off input which enables the
regulator to be switched on and off.
The regulator output voltage may be internally pin-strapped
for a 5V, 3V, 3.3V, 3.5V, 4.0V, 4.5V or programmed from 3V to
24V with an external pair of resistors. Using Calogic’s design,
process and testing technique make the CLM2931 superior
over similar products.
ORDERING INFORMATION
PART
CLM2931AS-X
PACKAGE
TEMPERATURE RANGE
Industrial
Plastic SOIC (8-Pin)
•
5V, 3.3V, 3.5V, 4.0V, and 4.5V Versions Available
•
Output Current in Excess of 100mA
•
Input-Output Differential is Less Than 0.6V
•
Mirror-Image Insertion Protection
•
Internal Thermal Overload Protection
•
Available as Adjustable with TTL Compatible Switch
•
Similar to Industry Standard LM2931
•
Reverse Battery Protection
•
Short Circuit Protection
•
60V Load Dump Protection
•
-50V Reverse Transient Protection
•
Portable Instrumentation
•
Radio Control Systems
•
Cordless Telephones
APPLICATIONS
X = Output Voltage, 5V = standard product, for all other ranges
contact factory.
PIN CONNECTIONS
8-PIN SURFACE MOUNT, FIX OUTPUT
OUTPUT
1
8
INPUT
GND
GND
2
CLM2931
3
7
6
GND
GND
NC
4
TOP VIEW
5
NC
8-PIN SRFACE MOUNT, ADJ. OUTPUT
OUTPUT
GND
GND
ADJ.
1
2
CLM2931
3
4
TOP VIEW
6
5
GND
ON/OFF
8
7
INPUT
GND
1M-07
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2931
CORPORATION
ABSOLUTE MAXIMUM RATINGS
Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited
Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260
o
C
Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150
o
C
Operating Junction Temperature Range . . . . . . . -40 to +85
o
C
Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . 0.30 to +26V
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2KV
ELECTRICAL CHARACTERISTICS:
V
S
= 14V, T
A
= 25
o
C, I
O
= 10mA, C2 = 100µF, unless otherwise specified. (Note 1)
PARAMETER
MIN
3V VERSION
Output Voltage
3.3V VERSION
Output Voltage
5V VERSION
Output Voltage
ALL VOLTAGE OPTIONS
Long Term Stability
Line Regulation
Load Regulation
Dropout Voltage
20
2.0
4.0
14
0.05
0.07
0.3
0.4
15
26
60
-15
-50
33
70
-30
-80
500
80
10
30
50
0.2
0.1
0.6
1.0
20
4.0
14
0.05
0.07
0.3
0.4
15
26
70
-15
-50
33
50
30
-80
500
80
30
50
0.2
0.1
0.6
1.0
mV/1000
mV
mV
V
V
V
mA
mA
V
V
V
V
µVrms
dB
R
L
= 500Ω, V
O
<5.5V, 100ms
V
O
>-0.3V, R
L
= 500Ω
1% Duty Cycle,
τ<100ms,
R
L
= 500Ω
10Hz-100kHz, C
OUT
= 100µF
f
O
= 120Hz
9V<V
IN
<16V
6V<V
IN
<26V
5mA<I
O
<100mA
I
O
= 10mA
I
O
= 50mA
I
O
= 100mA
I
O
<10mA,6V<V
IN
<26V, -40
o
C<T
J
<125
o
C
I
O
= 100mA, V
IN
= 14V, T
J
= 25
o
C
CLM2931A
TYP
MAX
MIN
CLM2931
TYP
CLM2931-3
2.91
2.85
3.0
3.0
3.09
3.15
V
V
6V<V
IN
<26V, I
O
= 100mA Over Temp.
MAX
UNITS
CONDITIONS
(Note 2)
CLM2931A-3
2.94
2.88
3.0
3.0
3.06
3.12
CLM2931A-3.3
3.23
3.20
3.30
3.30
3.36
3.39
CLM2931-3.3
3.20
3.16
3.30
3.30
CLM2931-5
4.75
4.50
5.0
5.25
5.50
V
V
6V<V
IN
<26V, I
O
= 100mA Over Temp.
3.39
3.43
V
V
6V<V
IN
<26V, I
O
= 100mA Over Temp.
CLM2931A-5
4.81
4.75
5.0
5.19
5.25
Quiescent Current
Maximum Operational
Input Current
Maximum Line Transient
Reverse Polarity Input
Voltage, DC
Reverse Polarity Input
Voltage, Transient
Output Noise Voltage
Ripple Rejection
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2931
CORPORATION
ADJUSTABLE VERSION ONLY:
V
IN
= 14V, V
O
= 3V, I
O
= 10mA, R1 = 27k, C2 = 100µF, T
J
= 25
o
PARAMETER
Output Voltage Range
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Output Noise Voltage
Long Term Stability
Ripple Rejection
Dropout Voltage
Maximum Operational Input Voltage
Maximum Line Transient
Reverse Polarity Input Voltage, DC
Reverse Polarity Input Voltage, Transient
On/Off Threshold Current
Threshold Votage
On
Off
Note 1:
Note 2:
Note 3:
Note 4:
26
60
-15
-50
CLM2931C
MIN
3.0
0.2
0.3
40
0.4
15
0.8
100
0.4
0.02
0.05
0.3
33
70
-30
-80
20
2.0
2.2
50
1.2
0.2
0.6
1.0
1.0
TYP
MAX
24
1.5
1.0
UNITS
V
mV
mV
mΩ/V
mA
mA
mA
µVrms
%/1000h
%/V
V
V
V
V
V
V
µA
V
V
O
= 3V
I
O
= 10mA, Reference Voltage <1.5V
V
O
>-0.3V, R
L
= 500Ω
1% Duty Cycle, T<100ms, R
L
= 500Ω
f
O
= 120Hz
I
O
< 10mA
I
O
= 100mA
V
OUT
+ 0.6V<V
IN
<26V
5mA<I
O
<100mA
100mADC and 10mArms, 100Hz-10kHz
I
O
= 10mA
I
O
= 100mA
During Shutdown R
L
= 500Ω
10Hz-100kHz
CONDITIONS
3.25
See TYPICAL APPLICATIONS notes to ensure constant junction temperature, low duty cycle pulse testing used.
All limits are at 25
o
C or over the full operating temperature junction range of -40
o
C to +125
o
C.
The maximum power dissipation is a function of maximum junction temperature, total thermal resistance, and ambient temperature.
Human body model, 100µF discharged through 1.5KΩ.
APPLICATION HINTS
The CLM2931 requires an output capacitor for device stability.
The value required varies greatly depending upon the
application circuit and other factors. The high frequency
characteristics of electolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes only bench
testing is the only means to determine the proper capacitor
type and value. The high quality 100µF aluminum electrolytic
covers all general application circuits, this stability can be
obtained with a tantalum electrolytic value of 47µF.
Another critical point of electrolytic characteristics is its
performance over temperature. The CLM2931 is designed to
operate starting at -40
o
C which may not be true in the case of
electrolytic. Higher temperatures are generally no problem.
The electrolytic type in aluminum will freeze at around -30
o
C.
This could cause an oscillation at output of regulator. At a
lower temperature requirement by many applications the
capacitor should maintain its performance. So as a result, for an
application which regulator junction temperature does not exceed
25
o
C, the output capacitor can be reduced by the factor of two
over the value needed for the entire temperature range.
Other points with linear regulators is that the twitch higher
output current stability decreases. In most applications the
CLM2931 is operating at a few milliamps.
In these
applications the output capacitance can be further reduced.
For example, when the regulator is running at 10mA output
current the output capacitance value is half compared to the
same regulator that is running at 100mA.
With the CLM2931CT adjustable regulator, the minimum value
of output capacitance is a function of the output voltage. The
value decreases with higher output voltages, since the
internal loop gain is reduced.
The worst case occurs at the lower temperature and
maximum operating currents, the entire circuit and the
electrolytic, should be cooled down to the minimum
temperature. The minimum of 0.6 volts required at the input
of regulator above the output to keep the power dissipation
and die heating to its minimum. After the value for the
capacitor has been determined for actual use, the value
should be doubled.
CALOGIC CORPORATION,
237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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