Global Mixed-mode Technology Inc.
G905
2.5V 600mA Low Dropout Regulator
Features
Dropout voltage typically 0.8V @ I
O
= 600mA
Output current in 600mA
Output voltage accuracy +2%
Quiescent current, typically 0.3mA
Internal short circuit current limit
Internal over temperature protection
General Description
The G905 positive 2.5V voltage regulator features the
ability to source 600mA of output current with a dropout
voltage of typically 0.8V. A low quiescent current is pro-
vided. The typical quiescent current is 0.3mA.
Familiar regulator features such as over temperature
and over current protection circuits are provided to
prevent it from being damaged by abnormal operating
conditions.
Application
CD-R/W
DVD-ROM
DVD player
LAN Switch
Broadband access
Ordering Information
ORDER
NUMBER
G905T24U
ORDER NUMBER
(Pb free)
G905T24Uf
TEMP.
RANGE
-40°C to 85°C
PACKAGE
SOT-89
1
GND
PIN OPTION
2
V
IN
3
V
OUT
Order Number Identification
GXXX
XX
X
X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
T2 : SO-T89
1
4 : GND
PIN OPTION
2
V
IN
3
V
OUT
PACKING
U & D : Tape & Reel Direction
Package Type
Typical Application
[Note 4] : Type of C
OUT
I
O
V
IN
G905
C1
1µF
IQ
V
OUT
C
OUT
10µF
Top View
1
2
3
SOT-89
Ver: 1.4
Apr 11, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1)
Input Voltage…………………………………………...7V
Power Dissipation Internally Limited……….…...(Note2)
Maximum Junction Temperature…………………150°C
Storage Temperature Range..……-65°C
≤
T
J
≤+150°C
Reflow Temperature (soldering, 10sec)............260°C
Thermal Resistance Junction to Ambient, (θ
JA
)
SOT-89…..……………………….….……….…173°C/W
Thermal Resistance Junction to Case, (θ
Jc
)
SOT-89…..……………………….….….……..…25°C/W
Note (1): See Recommended Minimum Footprint
G905
Absolute Maximum Ratings
Operating Conditions
(Note 1)
Input Voltage………………………….……..…3.3V ~ 6V
Temperature Range………………..…-40°C
≤
T
A
≤85°C
Electrical Characteristics
V
IN
=5V, I
O
= 600mA, C
IN
=1µF, C
OUT
=10µF. All specifications apply for T
A
= T
J
= 25°C. [Note 3]
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Ripple Rejection
Dropout Voltage
Output Current
Short Circuit Current
Current Limit
Over Temperature
CONDITION
10mA < I
O
< 600mA
4V < V
IN
< 6V, I
O
= 10mA
10mA < I
O
< 600mA
V
IN
= 5V
f
i
= 120Hz, V
ripple
=2V
P-P
, Io = 100mA
I
O
= 600mA
I
O
= 300mA
Continuous Test, V
IN
= 3.3V
T
A
= 25°C, T
J
< 125°C, V
OUT
within ±2% (Note 3)
Minimum
footprint
MIN
2.45
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TYP
2.5
15
10
0.3
47
800
400
600
0.65
0.8
145
MAX
2.55
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UNIT
V
mV
mV
mA
dB
mV
mA
A
A
°C
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating 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.
Note2:
The maximum power dissipation is a function of the maximum junction temperature, T
Jmax
; total thermal resistance,
θ
JA
,
and ambient temperature T
A
. The maximum allowable power dissipation at any ambient temperature is T
jmax
-T
A
/
θ
JA
. If
this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. For the
G905 in SOT-89 (T2) package,
θ
JA
is 173°C/W (See recommend 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 regu-
lator 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 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.
Ver: 1.4
Apr 11, 2005
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.
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Embedded System
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