Datasheet CLM2850AU, CLM2850AT Datasheet (Calogic LLC)

CORPORATION

5.0A Low Dropout Volt age Regulator
Adjustable

CLM2850

FEATURES

Adjustabl e Out put Down t o 1.2V

••

Output Current of 5A

••

Low Dropout Voltage

••

Extremely Ti gh t Load and Line Regul ati on

••

Current and Thermal Limiting

••

Standard 3-Te rmi nal Low Cost TO -2 20

••

Similar to Industry Standard LT1084

••

APPLICATIONS

Powering Int el Penti umTM µP from +5V Supplies

••

Power PCTM Supplies

••

SMPS Post-Regula tor

••

High Effic ie ncy "Gr ee n " Com put er System s

••

High Efficie ncy Line ar Powe r Supp lies

••

Portable I nst ru me nt atio n

••

Constant Curr ent Regulators

••

Adjustable Power Supplies

••

Battery Charger s

••

PIN CONNECTIONS

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
from +5V to 3.3V supplies and as a post regulator for
switching supplies application s.

The CLM2850 offers full protect ion against over -current f aults,
reversed input polarity, reversed load insertion, and positive
and negative transient voltage. On-Chip trimming adjusts the
reference voltage to 1%. The I
load which increases effic iency.

The CLM2850 is offered in a 3-pin TO-220 package
compatible with older 3 terminal regulators. For a 3A low
dropout regulat or refer to the CLM 283 0 data she et.

ORDERING INFORMATION
PART PACKAGE TEMPERATURE

CLM2850AU TO-220 (3-Pin) IND.
CLM2850AT TO-263 Plastic (3-Pin) IND.

For fixed output voltage contact factory.

TM

microprocessors to convert

of this device flows into the

Q

PLASTIC TO-263 PACKAGE

3
2

CLM2850

1V

FRONT VIEW

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, Cal ifornia 94539, Telephone: [phone], FAX: [phone]

V
V

ADJ

1F-01

IN

OUT

PLASTIC PACKAGE TO-220

CLM2850

FRONT VIEW

V
V
V

ADJ

1F-02

IN

OUT

CLM2850

ABSOLUTE MAXIMUM RATINGS

Lead Temp. (Solder ing, 10 Se conds) . . . . . . . . . . . . . . 300

Storage Temperatur e Ra nge. . . . . . . . . . . . . . . -65 to +150

Operating Ju nction Temperatur e Ran ge

CLM2850 Cont rol Sect i on . . . . . . . . . . . . . . 0

CLM2850 Power T ransist or. . . . . . . . . . . . . 0

o

C to +125oC

o

C to +150oC

CORPORATION

o

C

o

C

Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . +30V

Input to Out put Voltage Differential . . . . . . . . . . . . . . . . . +30V

ELECTRICAL CHARACTERISTICS: ( Note 1) I

PARAMETER

CLM2850

= 10mA, TA = 25oC, unless otherwise specified .

OUT

UNITS CONDITIONS

MIN TYP MAX

Reference Voltage

1.238

1.225

Min. Load Current 5 10 mA (V

Line Regulation

Load Regulation

Dropout Voltage 1.1 1.5 VI

Current Limit

5.5

0.3

Long T erm Stability 0.3 1 % T
Adjust Pin Current 55 120 µAT

1.250

1.250

0.015

0.035

0.05

0.1

0.2

6.5

0.6

1.262

1.270

0.2

0.2

0.5

0.3

0.4

VV10mA ≤ I

1.5V ≤ (VIN - V

- V

IN

%

1.5V ≤ V
I

%
%

= 10mA

LOAD

15V ≤ V

%%10mA ≤ I

(VIN - V

= I

OUT

AAV

- V

IN

V

- V

IN

= 125oC, 1000 Hrs.

A

= 25oC

A

Adjust Pin Current Change 0.2 5 µA
Thermal Regulation 0.003 0.015 %/W 30ms pulse
T emperature Stability 0.5 %
Ripple Rejection Ratio 60 75 dB V

Output Noise, RMS 0.003 %V

o

Thermal Resistance

0.65/2.7

C/W CLM2850 - TO-220 and TO-263

IN

I

OUT

10Hz to 10kHz

O

- V
= 3A, C

Junction-to-Case

OUT

) = + 25V

OUT

- V

IN

- V

IN

OUT

) = 3V

OUT

FULLLOAD

= 5V

OUT

= 25V

OUT

= 3V

OUT

≤ I

FULLLOAD

≤ 25V (Over T emperature)

OUT

≤ 15V

OUT

≤ 30V

OUT

≤ I

FULLLOAD

, ∆V

= 1%

REF

= 25µF, C

OUT

= 25µF, f = 120Hz

ADJ

The Bold specif i catio ns app l y to the over full ope rating temperature 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.

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, Cal ifornia 94539, Telephone: [phone], FAX: [phone]

CORPORATION

INPUT/OUTPUT DIFFERENTIAL (V)

10

0

035

1F-04

SHORT CIRCUIT CURRENT

SHORT CIRCUIT CURRENT (A)

1

2

3

4

5

6

7

8

9

5 1015202530

I

FULL LOAD

150˚C

25˚C

–55˚C

OUTPUT CURRENT (A)

2

0

06

1F-06

DROPOUT VOLTAGE

MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)

12 543

11

TJ= 25˚C

T

J

= –55˚C

T

J

= 150˚C

INDICATES GUARANTEED TEST POINT

0˚C ≤ TJ≤ 125˚C

–55˚C ≤ TJ≤ 150˚C

INPUT/OUTPUT DIFFERENTIAL (V)

10

0

035

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

TYPICAL PERFORMANCE CHARACTERI STI CS

CLM2850

0.10

0.05

–0.05

–0.10

–0.15

OUTPUT VOLTAGE DEVIATION (%)

–0.20

100

ADJUSTMENT PIN CURRENT (µA)

LOAD REGULATION

0

–25

–50 150

0 25 50 75 100 125
TEMPERATURE (˚C)

ADJUSTMENT PIN CURRENT

90
80
70
60
50
40
30
20
10

0
–50 150–25 0 25 50 75 100 125

TEMPERATURE (˚C)

I = 5A

∆

1F-03

1F-05

TEMPERATURE STABILITY

1.270

1.260

1.250

1.240

REFERENCE VOLTAGE (V)

1.230
–50 150

–25 0 25 50 75 100 125

TEMPERATURE (˚C)

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, Cal ifornia 94539, Telephone: [phone], FAX: [phone]

1F-07

CLM2850

TYPICAL APPLICA TION S

CORPORATION

V

IN

C

1

IN

5A CURRENT OUTPUT REGULATOR

CLM2850

ADJ

OUT

LOAD

V

IN

R

1

1F-09

C

1

V

OUT

IN

(1 + R1/R

= V

REF

TYPICAL ADJUSTABLE REGULATOR

CLM2850

) + I

ADJ

2

ADJ

R

V

OUT

R

C

1

2

R

2

2

OUT

1F-10

INTEL486

V

IN

+5V

C

1

INTEL468 AND PENTIUM IS A
TRADE MARK OF INTEL CORP.

IN

CLM2850

ADJ

OUT

3.45V

R

C

1

R

2

V

CC

TM

2

POWERING INTEL PENTIUM WITH CLM2850

1F-11

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, Cal ifornia 94539, Telephone: [phone], FAX: [phone]