GM6603-3.3TA3T datasheet(7/11 Pages) GAMMA

Part #	GM6603-3.3TA3T

Description	3.0A LOW DROPOUT PRECISION LINEAR REGULATORS

Download	11 Pages

Scroll/Zoom	100%

Manufacturer	GAMMA [Gamma Microelectronics Inc.]

Direct Link	http://www.gammamicro.com.tw/

Logo

7 / 11 page

Output Voltage Sensing

GM6603 series is three terminal regulator, so they can-

not provide true remote load sensing. Load regulation

is limited by the resistance of the conductors connect-

ing the regulator to the load. For best results, GM6603

should be connected as shown in Figure 2.

Calculating Power Dissipation and Heat

Sink Requirements

GM6603 series precision linear regulators include ther-

mal shutdown and current limit circuitry to protect the

devices. However, high power regulators normally oper-

ate at high junction temperatures so it is important to

calculate the power dissipation and junction tempera-

tures accurately to be sure that you use and adequate

heat sink. The case is connected to V

on GM6603

OUT

so electrical isolation may be required for some appli-

cations. Thermal compound should always be used

with high current regulators like the GM6603.

The thermal characteristics of an IC depend on four

factors:

1. Maximum Ambient Temperature T (°C)

A

2. Power Dissipation P (Watts)

D

3. Maximum Junction Temperature T (°C)

J

4. Thermal Resistance Junction to ambient R

JA

Q

(°C/W)

These relationship of these four factors is expressed

by equation (1):

Maximum ambient temperature and power dissipa-

tion are determined by the design while the maxi-

mum junction temperature and thermal resistance

depend on the manufacturer and the package type.

The maximum power dissipation for a regulator is ex-

pressed by equation (2):

where:

V

is the maximum input voltage,

IN(max)

V

is the minimum output voltage,

OUT(min)

I

is the maximum output current

OUT(max)

I is the maximum quiescent current at I

.

Q

OUT(max)

A heat sink effectively increases the surface area of

the package to improve the flow of heat away from

the IC into the air. Each material in the heat flow

path between the IC and the environment has a ther-

mal resistance. Like series electrical resistances,

these resistances are summed to determine R

,

QJA

the total thermal resistance between the junction

and the air. This is expressed by equation (3):

Where all of the following are in °C/W:

R

is thermal resistance of junction to case,

QJC

R

is thermal resistance of case to heat sink,

QCS

R

is thermal resistance of heat sink to ambient

QSA

air

The value for R

is calculated using equation (3)

QJA

and the result can be substituted in equation (1).

The value for R

is 3.5°C/W for a given package

QJC

type based on an average die size. For a high cur-

rent regulator such as GM6603, the majority of the

heat is generated in the power transistor section.

GM6603-3.3

V

IN

V

OUT

R

LOAD

R

C

GND

V

IN

Conductor

Parasitic

Resistance

(a) Fixed Version

(b) Adjustable Version

GM6603-A

ADJ

V

OUT

V

IN

V

IN

R

C

R

LOAD

R1

R2

(a),(b)

FIGURE 2

Conductor Parasitic Resistance Effects are

Minimized by this Grounding Scheme For Fixed

and Adjustable Output Regulators

P

={V

-V

} I

+ V

I

D(max)

IN(max)

OUT(min)

IN(max) Q

OUT(max)

R

= R

+ R

JA

JC

CS

SA

QQQ

Q

T = T + P X R

JAD

JA

Q

7

Conductor

Parasitic

Resistance

Similar Part No. - GM6603-3.3TA3T

Manufacturer	Part #	Datasheet	Description
List of Unclassifed Man...	GM6603-3.3TA3T	147Kb / 10P	3.0A PRECISION LINEAR REGULATORS
Gamma Microelectronics ...	GM6603-3.3TA3T	159Kb / 11P	3.0A LOW DROPOUT PRECISION REGULATOR
	GM6603-3.3TA3T	514Kb / 12P	3.0A LOW DROPOUT PRECISION REGULATOR
	GM6603-3.3TA3TG	514Kb / 12P	3.0A LOW DROPOUT PRECISION REGULATOR

More results

Similar Description - GM6603-3.3TA3T

Manufacturer	Part #	Datasheet	Description
List of Unclassifed Man...	GM6603	147Kb / 10P	3.0A PRECISION LINEAR REGULATORS
Gamma Microelectronics ...	GM6605	289Kb / 10P	5.0A LOW DROPOUT PRECISION LINEAR REGULATORS
Weitron Technology	WT1117A	652Kb / 11P	1.0A LOW DROPOUT PRECISION LINEAR REGULATORS
Gamma Microelectronics ...	GM1117	227Kb / 13P	1.0A LOW DROPOUT PRECISION LINEAR REGULATORS
Unisonic Technologies	LR3866	241Kb / 6P	3.0A LOW DROPOUT LINEAR REGULATOR
	LR3966	316Kb / 7P	3.0A LOW DROPOUT LINEAR REGULATOR
	LR3966	202Kb / 5P	3.0A LOW DROPOUT LINEAR REGULATOR
	LR3966	200Kb / 5P	3.0A LOW DROPOUT LINEAR REGULATOR
Gamma Microelectronics ...	GM6603	514Kb / 12P	3.0A LOW DROPOUT PRECISION REGULATOR
Gamma Microelectronics ...	GM6603	159Kb / 11P	3.0A LOW DROPOUT PRECISION REGULATOR

More results

GM6603-3.3TA3T Datasheet(PDF) 7 Page - Gamma Microelectronics Inc.

GM6603-3.3TA3T Datasheet(HTML) 7 Page - Gamma Microelectronics Inc.

Similar Part No. - GM6603-3.3TA3T

Similar Description - GM6603-3.3TA3T

Html Pages

1 2 3 4 5 6 7 8 9 10 11

Datasheet Download

Link URL