5.0A Low Dropout Voltage Regulator
Adjustable
CLM2850
FEATURES
Adjustable Output Down to 1.2V
Output Current of 5A
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Current and Thermal Limiting
Standard 3-Terminal Low Cost TO-220
Similar to Industry Standard LT1084
APPLICATIONS
Powering Intel Pentium
TM
P from +5V Supplies
Power PC
TM
Supplies
SMPS Post-Regulator
High Efficiency "Green" Computer Systems
High Efficiency Linear Power Supplies
Portable Instrumentation
Constant Current Regulators
Adjustable Power Supplies
Battery Chargers
PRODUCT DESCRIPTION
The Calogic CLM2850 is a low power 5A adjustable voltage
regulator that is very easy to use. It requires only 2 external
resistors to set the output voltage. This device is an excellent
choice for use in powering Intel
TM
microprocessors to convert
from +5V to 3.3V supplies and as a post regulator for
switching supplies applications.
The CLM2850 offers full protection against over-current faults,
reversed input polarity, reversed load insertion, and positive
and negative transient voltage. On-Chip trimming adjusts the
reference voltage to 1%. The I
Q
of this device flows into the
load which increases efficiency.
The CLM2850 is offered in a 3-pin TO-220 package
compatible with older 3 terminal regulators. For a 3A low
dropout regulator refer to the CLM2830 data sheet.
ORDERING INFORMATION
PART PACKAGE
TEMPERATURE
CLM2850AU
TO-220 (3-Pin)
IND.
CLM2850AT
TO-263 Plastic (3-Pin)
IND.
For fixed output voltage contact factory.
CORPORATION
PIN CONNECTIONS
1F-02
FRONT VIEW
V
IN
V
OUT
CLM2850
PLASTIC PACKAGE TO-220
V
ADJ
1F-01
PLASTIC TO-263 PACKAGE
FRONT VIEW
CLM2850
3
2
1
V
ADJ
V
OUT
V
IN
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 10 Seconds) . . . . . . . . . . . . . . 300
o
C
Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150
o
C
Operating Junction Temperature Range
CLM2850 Control Section . . . . . . . . . . . . . . 0
o
C to +125
o
C
CLM2850 Power Transistor . . . . . . . . . . . . . 0
o
C to +150
o
C
Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . +30V
Input to Output Voltage Differential . . . . . . . . . . . . . . . . . +30V
CLM2850
CORPORATION
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
ELECTRICAL CHARACTERISTICS: (Note 1) I
OUT
= 10mA, T
A
= 25
o
C, unless otherwise specified.
PARAMETER
CLM2850
UNITS
CONDITIONS
MIN
TYP
MAX
Reference Voltage
1.238
1.225
1.250
1.250
1.262
1.270
V
V
10mA
I
OUT
I
FULLLOAD
1.5V
(V
IN
- V
OUT
25V (Over Temperature)
Min. Load Current
5
10
mA
(V
IN
- V
OUT
) = + 25V
Line Regulation
0.015
0.035
0.05
0.2
0.2
0.5
%
%
%
1.5V
V
IN
- V
OUT
15V
I
LOAD
= 10mA
15V
V
IN
- V
OUT
30V
Load Regulation
0.1
0.2
0.3
0.4
%
%
10mA
I
OUT
I
FULLLOAD
(V
IN
- V
OUT
) =
3V
Dropout Voltage
1.1
1.5
V
I
OUT
= I
FULLLOAD
,
V
REF
= 1%
Current Limit
5.5
0.3
6.5
0.6
A
A
V
IN
- V
OUT
= 5V
V
IN
- V
OUT
= 25V
Long Term Stability
0.3
1
%
T
A
= 125
o
C, 1000 Hrs.
Adjust Pin Current
55
120
A
T
A
= 25
o
C
Adjust Pin Current Change
0.2
5
A
Thermal Regulation
0.003
0.015
%/W
30ms pulse
Temperature Stability
0.5
%
Ripple Rejection Ratio
60
75
dB
V
IN
- V
OUT
= 3V
I
OUT
= 3A, C
OUT
= 25
F, C
ADJ
= 25
F, f = 120Hz
Output Noise, RMS
0.003
%V
O
10Hz to 10kHz
Thermal Resistance
Junction-to-Case
0.65/2.7
o
C/W
CLM2850 - TO-220 and TO-263
The Bold specifications apply to the over full operating temperature range.
Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 2: A 10
F output capacitor is required on CLM2850.
CLM2850
CORPORATION
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
TEMPERATURE (C)
0.10
0.20
50
150
1F-03
LOAD REGULATION
OUTPUT VOLTAGE DEVIATION (%)
0.05
0
0.05
0.10
0.15
25
0
25
50
75 100 125
I = 5A
INPUT/OUTPUT DIFFERENTIAL (V)
10
0
0
35
1F-04
SHORT CIRCUIT CURRENT
SHORT CIRCUIT CURRENT (A)
1
2
3
4
5
6
7
8
9
5
10
15
20
25
30
I
FULL LOAD
150C
25C
55C
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (C)
1F-05
ADJUSTMENT PIN CURRENT
50
150
25
0
25
50
75 100 125
100
0
10
20
30
40
50
60
70
80
90
ADJUSTMENT PIN CURRENT (
A)
OUTPUT CURRENT (A)
2
0
0
6
1F-06
DROPOUT VOLTAGE
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
1
2
5
4
3
1
1
T
J
= 25C
T
J
= 55C
T
J
= 150C
INDICATES GUARANTEED TEST POINT
0C
T
J
125C
55C
T
J
150C
TEMPERATURE (C)
1.270
1.230
50
150
1F-07
TEMPERATURE STABILITY
REFERENCE VOLTAGE (V)
25
0
25
50
75 100 125
1.240
1.260
1.250
INPUT/OUTPUT DIFFERENTIAL (V)
10
0
0
35
1F-08
MINIMUM
OPERATING CURRENT
MINIMUM OPERATING CURRENT (mA)
1
2
3
4
5
6
7
8
9
5
10
15
20
25
30
T
J
= 55C
T
J
= 25C
T
J
= 150C
CLM2850
CORPORATION
1F-09
CLM2850
OUT
ADJ
5A CURRENT OUTPUT REGULATOR
V
IN
R
1
C
1
IN
LOAD
1F-10
CLM2850
OUT
ADJ
TYPICAL ADJUSTABLE REGULATOR
OUT
V
IN
R
2
R
1
C
2
V
C
1
IN
) + I
ADJ
(1 + R
1
/R
2
= V
REF
V
OUT
R
2
TYPICAL APPLICATIONS
1F-11
CLM2850
OUT
ADJ
V
IN
R
2
R
1
C
2
C
1
IN
3.45V
V
CC
+5V
POWERING INTEL PENTIUM WITH CLM2850
INTEL468 AND PENTIUM IS A
TRADE MARK OF INTEL CORP.
INTEL486
TM
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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