GU1085

Page: 2/4

ISSUED DATE :2005/06/01

REVISED DATE :2006/06/01C

Pin Descriptions

Name

I/O

Pin#

Function

Adj (GND)

1

Adjustable (Ground only for fixed mode)

Vout

O

2

The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to

ground to insure stability.

Vin

I

3

The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground

to insure that the input voltage does not sag below the minimum dropout voltage during the load

transient response. This pin must always be 1.4V higher than Vout in order for the device to

regulate properly.

Absolute Maximum Ratings

Symbol

Parameter

Ratings

Unit

DC Supply Voltage

-0.3 to 12

V

Power Dissipation

Internally Limited

Storage Temperature

-65 ~ + 150

:

Operating Junction Temperature Range

0 ~ + 150

:

Electrical Characteristics

Parameter

Conditions

MIN

TYP

MAX

UNIT

Reference Voltage

GU1085-ADJ

: (Vin-Vout )=1.5V

1.225

1.250

1.275

V

GU1085-1.5

: 3.0V Vin 12V

1.470

1.500

1.530

V

GU1085-1.8

: 3.3V Vin 12V

1.764

1.800

1.836

V

GU1085-2.5

: 4.0V Vin 12V

2.450

2.500

2.550

V

GU1085-3.3

: 4.8V Vin 12V

3.235

3.300

3.365

V

Output Voltage

GU1085-5.0

: 6.5V Vin 12V

4.900

5.000

5.100

V

Line Regulator

GU1085-XXX

Io=10mA, Vout+1.5<Vin<12

-

-

0.2

%

GU1085-ADJ

-

-

1

%

GU1085-1.5

-

12

15

mV

GU1085-1.8

-

15

18

mV

GU1085-2.5

-

20

25

mV

GU1085-3.3

-

26

33

mV

Load Regulation

GU1085-5.0

-

40

50

mV

Dropout Voltage

(Vin-Vout)

GU1085-XXX

Io=3A( Vout=1% Vout)

-

1.3

1.4

V

Current Limit

GU1085-XXX

Vin-Vout=5V

3.1

-

-

A

Minimum Load Current Adjustable model

Vin=5V

-

5

10

mA

Adjust Pin Current

Adjustable model

Vin=12V, Io=10mA

-

55

100

uA

Quiescent Current

fixed model

Vin=12V, Io=0mA

-

-

12

mA

Thermal Regulation

-

0.008

0.04

%/W

Ripple Rejection

GU1085-XXX

Vin=Vout+3V

-

60

70

dB

Temperature Stability

Io=10mA

-

0.5

-

%

Thermal Resistance

Junction–to-Ambient

(No heat sink ;No air flow)

-

91

-

/

: W

Thermal Resistance

Junction-to-Case

Control Circuitry/Power Transistor

-

10

-

/

: W

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured

at a constant junction Temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =1/18” from the

package.

Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the

difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full

input/output range.