Datasheet G905T24U, G905T24D Datasheet (GMT)

Global Mixed-mode Technology Inc.

G905

2.5V 500mA Low Dropout Regulator

Features

Dropout voltage typically 0.45V @ IO = 500mA

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Output current in 500mA

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Output voltage accuracy +2%

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Quiescent current, typically 0.6mA

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Internal short circuit current limit

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Internal over temperature protection

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Application

CD-R/W

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DVD-ROM

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DVD player

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LAN Switch

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Broadband access

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Ordering Information

ORDER NUMBER PACKAGE TYPE

G905T24U SOT 89 GND VIN V

General Description

The G905 positive 2.5V voltage regulator features the
ability to source 500mA of output current with a dropout
voltage of typically 0.45V. A low quiescent current is
provided. The typical quiescent current is 0.6mA.

Familiar regulator features such as over temperature
and over current protection circuits are provided to
prevent it from being damaged by abnormal operating
conditions.

PIN OPTION

1 2 3

OUT

Order Number Identification

GXXX XX X X

Packing Type
Pin Option
Package Type
Part Number

PACKAGE TYPE PIN OPTION PACKING

T2 : SOT 89
4 : GND V

1 2 3

V

IN

OUT

U & D : Tape & Reel Direction

Typical Application Package Type

[Note 4] : Type of C

OUT

I

I

O

V

V

IN

IN

G905

G905

O

V

V

OUT

OUT

Top View

Top View

Ver: 1.1

Jan 31, 2002

C1

C1
1µF

1µF

IQ

IQ

C

C

OUT

OUT

10µF

10µF

1

2

2

3

1

1

SOT 89

SOT 89

3

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Absolute Maximum Ratings

Input Voltage…………………………………………...7V
Power Dissipation Internally Limited……….…...(Note2)
Maximum Junction Temperature…………………150°C
Storage Temperature Range..……-65°C ≤ T
Lead Temperature, Time for Wave Soldering
SOT-89 Package……….……………….…...260°C, 10s
Continuous Power Dissipation (T
SOT-89

Note (1): See Recommended Minimum Footprint

(1)

……………..……………………..……...0.5W

=+25°C)

A

(Note 1)

≤+150°C

J

G905

Operating Conditions

Input Voltage…………………………..………2.7V ~ 6V
Temperature Range…………………...0°C ≤ T

(Note 1)

≤125°C

J

Electrical Characteristics

VIN =5V, IO = 500mA, CIN=1µF, C

=10µF. All specifications apply for TA = TJ = 25°C. [Note 3]

OUT

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output Voltage 10mA < IO <500mA 2.45 2.5 2.55 V

Line Regulation 3.3V < VIN <6.5V, IO = 10mA 1 50 mV

Load Regulation 10mA < IO < 500mA 20 60 mV

Output Impedance 200mA DC and 100mA AC, fO = 120Hz 80 mΩ

Quiescent Current VIN = 5V 0.6 mA

Ripple Rejection fi = 120Hz, V

Dropout Voltage

Output Current

Short Circuit Current 0.77 A

Over Temperature 150 °C

Note 1:

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating

IO = 500mA 450

I

= 100mA 220

O

Continuous Test, V

= 25°C, TJ < 125°C, V

T

A

ripple

=2V

, Io = 100mA 46 dB

P-P

= 3.3V

IN

within ±2% (Note 3)

OUT

Minimum
footprint

500 mA

mV

Conditions 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, T
sistance,
perature is T
will go into thermal shutdown. For the G905 in SOT-89 (T2) package,

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

θ

JA

/

. If this dissipation is exceeded, the die temperature will rise above 150°C and IC

jmax-TA

θ

JA

is 250°C/W (See recommend

θ

JA

; total thermal re-

Jmax

minimum footprint). The safe operation in SOT-89 package, it can see “Typical Performance Characteris­tics” (Safe Operating Area).

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.

Definitions

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 100mV below its nominal value, dropout
voltage is affected by junction temperature, load cur­rent and minimum input supply requirements.

Load Regulation

The change in output voltage for a change in load
current at constant chip temperature. The measure­ment is made under conditions of low dissipation or by
using pulse techniques such that average chip tem­perature is not significantly affected.

Maximum Power Dissipation

The maximum total device dissipation for which the

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-

regulator will operate within specifications.

Quiescent Bias Current

Current which is used to operate the regulator chip
and is not delivered to the load.

fected.

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Typical Performance Characteristics

(VIN= +5V, CIN=1µF, C

=10µF, TA=25°C, unless otherwise noted.)

OUT

Line Transient Load Transient

Ch1: Vin (offset=5.0V) Ch1: Iout (400mA/div)

Ch2: Vout (offset=2.50V) Ch2: Vout is AC coupled

CIN = 1µF

Iout=100mA

G905

Output Voltage vs. Load Current Dropout Voltage vs. Load Current

2.630

2.610

2.590

2.570

2.550

2.530

2.510

Ootput Voltage (V)

2.490

2.470

2.450
0 50 100 1 50 200 250 300 350 400 450 500

Load Current (mA)

700

600

500

400

300

200

Dropout Voltage (mV)

100

0

0 50 100 150 200 250 300 350 400 450 500

Load Current (mA)

Ground Current vs. Load Current

2.00

1.80

1.60

1.40

1.20

1.00

0.80

0.60

0.40

Ground Current (mA)

0.20

0.00
0 50 100 150 200 250 300 350 400 450 500

Load Current (mA)

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Typical Performance Characteristics

(VIN= +3.3V, CIN=1µF, C

Line Transient Load Transient

Ch1: Vin (offset=3.3V) Ch1: Iout (400mA/div)
Ch2: Vout (offset=2.50V) Ch2: Vout is AC coupled
C
Iout=100mA

IN

= 1µF

=10µF, TA=25°C, unless otherwise noted.)

OUT

G905

Output Voltage vs. Load Current Dropout Voltage vs. Load Current

2.590

2.570

2.550

2.530

2.510

2.490

Ootput Voltage (V)

2.470

2.450
0 50 100 150 200 250 300 350 400 450 500

Load Current (mA)

500

450

400

350

300

250

200

150

Dropout Voltage (mV)

100

50

0

0 50 100 150 200 250 300 350 400 450 500

Load Current (mA)

Ground Current vs. Load Current

2.00

1.80

1.60

1.40

1.20

1.00

0.80

0.60

0.40

Ground Current (mA)

0.20

0.00
0 50 1 00 150 200 250 3 00 350 400 450 5 00

Load Current (mA)

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Typical Performance Characteristics

(VIN= +5V, CIN=1µF, C

Safe Operating of SOT-89 Maximum Power Dissipation of SOT-89

600

Maximum recommended out put current

500

400

300

200

1oz Copper on SOT-89 Pac kage

100

Output Current (mA)

1Mounted on recomm ended mimim um footpri nt

=250°C/W)

(R

JA

θ

0

0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 2.8 3.0 3.3 3.5

Input-Output Voltage Differential VIN-V

=10µF, TA=25°C, unless otherwise noted.)

OUT

TA=25°C,Still Air

TA=25

TA=55

TA=85

(V)

OUT

G905

0.7

0.6

0.5

℃

℃

℃

0.4

0.3

0.2

Still Air
1oz Copper on SOT-89 Pac kage

Power Dissipation (W)

0.1

Mount on recomm end footprint (RθJA=250°C/W)

0.0

25 35 45 55 65 75 85 95 105 115 125

Amibent Temperature TA (℃)

Recommend Minimum Footprint

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Package Information

D

G905

D1

MATTE FINISH

b

e

b1

b

E

HE

A1

A

POLISH

SOT- 89 (T2) Package

POLISH

C

SYMBOLS

A 1.40 1.50 1.60 0.055 0.059 0.063

A1 0.80 1.04 ----- 0.031 0.041 -----

b 0.36 0.42 0.48 0.014 0.016 0.048

b1 0.41 0.47 0.53 0.016 0.018 0.020

C 038 0.40 0.43 0.014 0.015 0.017

D 4.40 4.50 4.60 0.173 0.177 0.181

D1 1.40 1.60 1.75 0.055 0.062 0.069

HE ----- ----- 4.25 ----- ----- 0.167

E 2.40 2.50 2.60 0.094 0.098 0.102

e 2.90 3.00 3.10 0.114 0.118 0.122

DIMENSIONS IN MILLIMETERS DIMENSIONS IN INCHES

MIN NOM MAX MIN NOM MAX

Package Orientation

Feed Direction

Feed Direction

SOT 89 Package Orientation

SOT 89 Package Orientation

GMT Inc. d oes 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.

Ver: 1.1

Jan 31, 2002

6

TEL: [phone]

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