G1084T54U - Global Mixed-Mode Technology, Inc.

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

5A Adjustable Low-Dropout Linear Regulator

Features

 Available in Adjust Version

 Space Saving TO-252 Package and TO-263

Package

 Internal Short Circuit Current Limiting

 Internal Over Temperature Protection

 Output Current 5A

Applications

 Post Regulation for Switching DC/DC Con-

verter

 High Efficiency Linear Regulator

 Battery Charger

 Battery Powered Instrumentation

 Motherboard

General Description

The G1084 is a low dropout linear regulator with a

dropout of 1.2V at 5A of load current. It is avail-

able in an adjustable version, which can set the

output from 1.25V to 5V with only two external

resistors.

The G1084 provides over temperature and over

current protection circuits to prevent it from being

damaged by abnormal operating conditions.

The G1084 is available in TO-252 and TO-263

packages. A minimum of 220µF tantalum electro-

lytic capacitor is required at the output to improve

the transient response and stability.

Ordering Information

PIN OPTION ORDER

NUMBER

ORDER NUMBER

(Pb free) MARKING TEMP. RANGE PACKAGE 1 2 3

G1084T43U G1084T43Uf G1084 -40°C to +85°C TO-252 GND/ADJ VOUT V

G1084T53U G1084T53Uf G1084 -40°C to +85°C TO-263 GND/ADJ VOUT V

* For other package types and pin options, please contact us at sales @gmt.com.tw

Order Number Identification

GXXXX XX X X

Packing Type

Pin Option

Package Type

Part Number

PACKAGE TYPE PIN OPTION PACKING

T4: TO-252 1 2 3 U: Tape & Reel

T5: TO-263 3: GND/ADJ VOUT V

Package Type Typical Application

[Note 4]: Type of COUT

VIN G1084

220µF

VOUT

COUT

220µF

GND/ADJ

VIN VOUT

Top View

123

TO-252、TO-263

VIN G1084

220µF

VOUT

COUT

220µF

GND/ADJ

VIN VOUT

Top View

123

TO-252、TO-263

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Absolute Maximum Ratings (Note 1)

Input Voltage…………………………………………7V

Power Dissipation Internally Limited (Note 2)

Maximum Junction Temperature….………….....…150°C

Storage Temperature Range………-65°C ≤ TJ ≤+150°C

Reflow Temperature (soldering, 10sec).…........260°C

Thermal Resistance Junction to Ambient

TO-252(1)………………...………………………125°C/W

TO-263(1)………………………………………….100°C/W

Thermal Resistance Junction to Case

TO-252…………….………...................10°C/W

TO-263………………..……………………….........6°C/W

ESD Rating (Human Body Model)…….....................2kV

Note (1): See Recommended Minimum Footprint

Operating Conditions (Note 1)

(VIN-VADJ) Voltage………..……………….……2.5V~5.5V

Temperature Range…………….…..…..-40°C≤TA≤ 85°C

Electrical Characteristics

Operating Conditions: VIN ≤ 5.5V, TA =TJ = 25°C unless otherwise specified. [Note3]

PARAMETER CONDITION MIN TYP MAX UNIT

Reference Voltage VIN - VOUT = 2V, IOUT = 10mA 1.225 1.250 1.275 V

Line Regulation (VOUT + 1.5V) < VIN < 5.5V, IOUT = 10mA --- 0.5 1 %

Load Regulation (VIN - VOUT) = 2V, 10mA < IOUT <5A --- 0.04 0.5 %

Dropout Voltage ∆VOUT = 2%, IOUT = 5A --- 1.3 1.5 V

Current Limit (VIN - VOUT) = 2V --- 5.4 --- A

Adjust Pin Current Change VIN - VOUT = 2V, 10mA < IOUT < 5A --- 0.15 --- µA

Minimum Load Current 1.5V < (VIN - VOUT) < 5.25V 10 --- --- mA

Quiescent Current VIN - VOUT = 2V --- 80 150 µA

Ripple Rejection f = 120Hz, COUT = 10µF Tantalum,

(VIN - VOUT) = 3V, IOUT = 1A --- 45 --- dB

Temperature Stability VIN = 4V, IO =10mA --- 0.3 --- %

RMS Output Noise (% of VOUT) TA = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA --- 0.007 --- %

Thermal Shutdown Junction Temperature --- 150 --- °C

Thermal Shutdown Hysteresis --- 30 --- °C

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Con-

ditions are conditions under which the device functions but the specifications might not be guaranteed. For

guaranteed specifications and test conditions see the Electrical Characteristics.

Note 2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal re-

sistance, θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient tem-

perature is Tjmax-TA / θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and IC

will go into thermal shutdown.

Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.

Note4: The type of output capacitor should be tantalum or aluminum.

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Definitions

Output Voltage

The G1084 provides an adjustable output voltage from

1.25V to 5V. with two external resistors. It can be for-

mulated as:

VOUT = 1.25V x (1+ R1 ) + IADJ x R2

IADJ = 80µA (typ.)

Dropout Voltage

The input/output Voltage differential at which the

regulator output no longer maintains regulation against

further reductions in input voltage. Measured when the

output drops 2% below its nominal value. Dropout

voltage is affected by junction temperature, load cur-

rent and minimum input supply requirements.

Line Regulation

The change in output voltage for a change in input

voltage. The measurement is made under conditions

of low dissipation or by using pulse techniques such

that average chip temperature is not significantly af-

fected.

Load Regulation

The change in output voltage for a change in load

current at constant chip temperature. The measure-

ment is made under conditions of low dissipation or by

using pulse techniques such that average chip tem-

perature is not significantly affected.

Maximum Power Dissipation

The maximum total device dissipation for which the

regulator will operate within specifications.

Quiescent Bias Current

Current which is used to operate the regulator chip

and is not delivered to the load.

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Typical Performance Characteristics

(VIN-VOUT = 3V, VOUT = 1.25V, CIN = 220µF, COUT = 220µF, TA=25°C, unless otherwise noted.)

10 100 1000 10000 100000 1000000

Frequency (Hz)

Ripple Rejection (dB)

1.225

1.230

1.235

1.240

1.245

1.250

1.255

1.260

1.265

1.270

1.275

2.533.544.555.56

VIN (V)

VOUT (V)

625mA

(VIN-VOUT)>Vdropout

Vripple<0.5VP-P

OUT

= 220

T = 25°C

T = -25°C

Line Transient Response Load Transient Response

Short Circuit-Current Output Noise

Ripple Rejection Line Regulation

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Typical Performance Characteristics (continued)

Dropout Voltage vs. IOUT Load Regulation

Output Voltage vs. Temperature

IL = 2.5A

Adj Pin Current vs. Temperature

0.5

1.5

01234

IOUT (A)

Dropout Voltage (V)

T = 25°C

1.240

1.243

1.245

1.248

1.250

1.253

1.255

-50 -30 -10 10 30 50 70

Temperature (°C)

VOUT (V)

VIN = 5V

VIN = 3V

100

-50-30-1010305070

Temperature (°C)

Adj Pin Current (µA)

VIN = 5V

VIN = 3V

-5

-3

-1

-50-30-1010305070

Temperature (°C)

Output Voltage Deviation (mV)

IL = 10mA~2.5A

VIN = 3V

VIN = 5V

IL = 2.5A

0.5

1.5

2.5

3.5

012345

PCB Top Copper Area (in2)

Max. Dissipation Power (W)

0.5

1.5

2.5

3.5

25 35 45 55 65 75 85

TAMB (°C)

Max. Dissipation Power (W)

A=0.1

A=0.2

A=0.3

A=0.4

A=0.5

A=1.0

A=1.5

A=2.0

A=2.5

A=3.0

A=3.5

A=4.0

A=4.5

A=5.0

G1084T43(TO-252) Max. Power

Dissipation vs. TAMB (still air)

( Different PCB Top Copper Area )

Unit : in2

G1084T43(TO-252) Max. Power

Dissipation vs. PCB Top Copper

Area TAMB = 25°C ; Still Air

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Typical Performance Characteristics (continued)

Recommend Minimum Footprint

0.5

1.5

2.5

3.5

4.5

0.5 1.5 2.5 3.5 4.5

PCB Top Copper Area (in2)

Max. Dissipation Power (W)

0.5

1.5

2.5

3.5

4.5

25 35 45 55 65 75 85

TAMB (°C)

Max. Dissipation Power (W)

A=0.5

A=1.0

A=1.5

A=2.0

A=2.5

A=3.0

A=3.5

A=4.0

A=4.5

A=5.0

G1084T53(TO-263) Max. Power

Dissipation vs. PCB Top Copper

Area TAMB = 25°C ; Still Air

G1084T53(TO-263) Max. Power

Dissipation vs. TAMB (still air)

( Different PCB Top Copper Area )

Unit : in2

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

Package Information

TO-252 (T4) Package

MILLIMETER INCH

SYMBOL MIN. MAX. MIN. MAX.

A 2.19 2.38 0.086 0.094

A1 0.89 1.27 0.035 0.050

b 0.64 0.89 0.025 0.035

C 0.46 0.58 0.018 0.023

D 5.97 6.22 0.235 0.245

E 6.35 6.73 0.250 0.265

E1 5.21 5.46 0.205 0.215

e 2.26BSC 0.09BSC

e1 3.96 5.18 0.156 0.204

F 0.46 0.58 0.018 0.023

L1 0.89 2.03 0.035 0.080

L2 0.64 1.02 0.025 0.040

L3 2.40 2.80 0.095 0.110

H 9.40 10.40 0.370 0.410

θ 0° 4° 0° 4°

Ver: 1.1

Sep 20, 2004

TEL: 886-3-5788833

http://www.gmt.com.tw

G1084

Global Mixed-mode Technology Inc.

TO-263 (T5) Package

MILLIMETER INCH

SYMBOL MIN MAX MIN MAX

A 4.30 4.70 0.169 0.185

A1 1.22 1.32 0.048 0.055

A2 2.45 2.69 0.104 0.106

b 0.69 0.94 0.027 0.037

b1 1.22 1.40 0.048 0.055

C 0.36 0.56 0.014 0.022

D 8.64 9.652 0.340 0.380

E 9.70 10.54 0.382 0.415

e 2.29 2.79 0.090 0.110

e1 4.83 5.33 0.190 0.210

H 14.60 15.78 0.575 0.625

L 4.70 5.84 0.185 0.230

L1 1.20 1.778 0.047 0.070

L2 2.24 2.84 0.088 0.111

L3 1.40MAX 0.055MAX

Taping Specification

PACKAGE Q’TY/REEL

TO-252 2,500 ea

TO-263 1,000 ea

GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.

Feed Direction

TO-252 Package Orientation

Feed Direction

TO-263 Package Orientation

Feed Direction

TO-252 Package Orientation

Feed Direction

TO-263 Package Orientation