5.0A Low Dropout Voltage Regulator
Adjustable
CLM2850
FEATURES
••Adju s tabl e Out put Down to 1. 2V
••Output Current of 5A
••Low Dropout Voltage
••Extr em ely Tig h t Load and Line Regulat io n
••Current and Thermal L im iting
••Standard 3-Terminal Low Cost TO-220
••Sim ilar to Ind ust ry Stan dar d LT108 4
APPLICATIONS
••Powe ri ng Int el Pent ium TM µP from +5V Supplies
••Powe r PCTM Supplies
••SMPS Post -Regu lato r
••High Ef f ic iency "G r een " Com put er Syst em s
••High Ef f icie ncy Line ar Powe r Supplies
••Port abl e Inst ru me nt at io n
••Con st ant Current Regu la to rs
••Adjus table Power Su pplies
••Batt ery Char ger s
PRODUCT DESCRI PTI ON
The Calogic CLM2850 is a low power 5A adjustable voltage
regulator that is very easy to use. I t requi res onl y 2 external
resistors to set the output voltage. This device is an excellent
choice for use in powering IntelTM microprocessors to convert
from +5V to 3.3V supplies and as a post regulator for
switching su pplies app lication s.
The CLM2850 off ers full protect ion against o ver-cur r ent faults,
reversed input polarity, reversed load insertion, and positive
and negati ve transient voltage. On-Chip trimming adjusts the
reference voltage to 1%. The IQ of this device flows into the
load which incre ases efficie ncy.
The CLM2850 is offered in a 3-pin TO-220 package
compatible with older 3 terminal regulators. For a 3A low
dropo ut regulat or r efer to the CLM283 0 dat a sheet .
ORDERING INFORMATION
PART PACKAGE TEMPERATURE
CLM28 50AU TO-2 20 (3-Pin) IND.
CLM28 50AT TO-26 3 Plast ic (3- Pin) IND.
For fixed output voltage contact factory.
CORPORATION
PIN CONNECTI O NS
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
1V
ADJ
V
OUT
V
IN
CALOGIC CORPORATION, 237 Whitney Place, Fremont , California 94539, Telephone: 510 -656- 2900, FAX: 510-65 1-3025
ABSOLUTE M AXIM UM R A T INGS
Lead Tem p. (Solder ing, 10 Se cond s) . . . . . . . . . . . . . . 300 oC
Stor age Temper at ure R a nge. . . . . . . . . . . . . . . -65 t o +150oC
Oper ating Ju nct ion Te m per atur e Ran ge
CLM2 8 50 Cont rol Sect io n . . . . . . . . . . . . . . 0oC to +125 oC
CLM28 50 Powe r T ransist or. . . . . . . . . . . . . 0oC to +150 oC
Input Supp ly Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . +30V
Input t o O ut put Voltage Differential . . . . . . . . . . . . . . . . . +30V
CLM2850
CORPORATION
CALOGIC CORPORATION, 237 Whitney Place, Fremont , California 94539, Telephone: 510 -656- 2900, FAX: 510-65 1-3025
ELECTRICA L CHARACTERI STICS: ( Note 1) IOUT = 10m A, TA = 25 oC, unless other wise spe cified.
PARAMETER CLM2850 UNITS CONDITIONS
MIN TYP MAX
Reference Vol tage 1.238
1.225 1.250
1.250 1.262
1.270 V
V10m A ≤ IOUT ≤ IFULLLOAD
1.5V ≤ (VIN - VOUT ≤ 25V (Over Temperature)
Min. Load Current 510 mA (VIN - VOUT) = + 25 V
Line Regulation 0.015
0.035
0.05
0.2
0.2
0.5
%
%
%
1.5V ≤ VIN - VOUT ≤ 15V
ILOAD = 10mA
15V ≤ VIN - VOUT ≤ 30V
Load Regulation 0.1
0.2 0.3
0.4 %
%10m A ≤ IOUT ≤ IFULLLOAD
(VIN - VOUT) = 3V
Dropout Vol tage 1.1 1.5 VI
OUT = IFULLLOAD, ∆VREF = 1%
Current Lim it 5.5
0.3 6.5
0.6 A
AVIN - VOUT = 5 V
VIN - VOUT = 2 5V
Long Term Stability 0.3 1 % TA = 125oC , 1000 Hrs.
Adjust Pin Current 55 120 µAT
A = 25oC
Adjust Pin Current Change 0.2 5 µA
Thermal Regulation 0.003 0.015 %/W 30ms pulse
Temperature Stability 0.5 %
Ripple Rejection Ratio 60 75 dB VIN - VOUT = 3V
IOUT = 3A, COUT = 25µF, CADJ = 25µF, f = 120Hz
Output Noise, RMS 0.003 %VO10Hz to 10kHz
Thermal Resistance
Junction-to-Case 0.65/2.7 oC/W CLM2850 - TO-220 a nd TO-263
Th e Bold specif ica tio ns app l y to the ove r full ope rating tem pe ratu re range .
Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 2: A 10µF output capacitor is required on CLM2850.
CLM2850
CORPORATION
CALOGIC CORPORATION, 237 Whitney Place, Fremont , California 94539, Telephone: 510 -656- 2900, FAX: 510-65 1-3025
TEMPERATURE (˚C)
0.10
–0.20
–50 150
1F-03
LOAD REGULATION
OUTPUT VOLTAGE DEVIATION (%)
0.05
0
–0.05
–0.10
–0.15
–25 025 50 75 100 125
∆I = 5A
INPUT/OUTPUT DIFFERENTIAL (V)
10
0035
1F-04
SHORT CIRCUIT CURRENT
SHORT CIRCUIT CURRENT (A)
1
2
3
4
5
6
7
8
9
5 1015202530
IFULL LOAD
150˚C
25˚C
–55˚C
TYPICAL PERFO RM ANCE CHARACTERI STIC S
TEMPERATURE (˚C) 1F-05
ADJUSTMENT PIN CURRENT
–50 150–25 025 50 75 100 125
100
0
10
20
30
40
50
60
70
80
90
ADJUSTMENT PIN CURRENT (µA)
OUTPUT CURRENT (A)
2
006
1F-06
DROPOUT VOLTAGE
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
12 543
11
TJ= 25˚C
TJ= –55˚C
TJ= 150˚C
INDICATES GUARANTEED TEST POINT
0˚C ≤ TJ≤ 125˚C
–55˚C ≤ TJ≤ 150˚C
TEMPERATURE (˚C)
1.270
1.230
–50 150
1F-07
TEMPERATURE STABILITY
REFERENCE VOLTAGE (V)
–25 025 50 75 100 125
1.240
1.260
1.250
INPUT/OUTPUT DIFFERENTIAL (V)
10
0035
1F-08
MINIMUM
OPERATING CURRENT
MINIMUM OPERATING CURRENT (mA)
1
2
3
4
5
6
7
8
9
5 1015202530
TJ= –55˚C
TJ= 25˚C
TJ= 150˚C
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 APPL ICA TION S
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: 510-65 1-3025
