Global Mixed-mode Technology Inc.
G950
2.5V 1A Regulator
Features
Output current in excess of 1A
Output voltage accuracy +3%/-1%
Quiescent current, typically 600µA
Internal short circuit current limit
Internal over temperature protection
General Description
The G950 positive 2.5V voltage regulator features
the ability to source 1A of output current. The typical
quiescent current is 0.6mA.
Applications
PC motherboard
ADSL/Cable Modem
Set-Top-Box
LAN switch/Hub
Router
Familiar regulator features such as over tempera-
ture and over current protection circuits are pro-
vided to prevent it from being damaged by ab-
normal operating conditions.
Ordering Information
ORDER NUMBER
G950T45U
G950T55U
G950T63U
G950T64U
G950T65U
G950T66U
PACKAGE TYPE
TO 252
TO 263
SOT 223
SOT 223
SOT 223
SOT 223
1
V
IN
V
IN
GND
GND
V
IN
V
IN
PIN OPTION
2
GND
GND
V
OUT
V
IN
GND
V
OUT
3
V
OUT
V
OUT
V
IN
V
OUT
V
OUT
GND
* For other package types and pin options, please contact us at sales
@
gmt.com.tw
Order Number Identification
GXXX
XX
X
X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
T3 : TO 220
T4 : TO 252
T5 : TO 263
T6 : SOT 223
PIN OPTION
1
1 : V
OUT
2 : V
OUT
3 : GND
4 : GND
5 : V
IN
6 : V
IN
2
GND
V
IN
V
OUT
V
IN
GND
V
OUT
3
V
IN
GND
V
IN
V
OUT
V
OUT
GND
PACKING
U & D : Tape & Reel Direction
T : Tube
Typical Application
[Note 4] : Type of C
OUT
I
O
V
IN
C1
1µF
Package Type
G950
IQ
V
OUT
C
OUT
10µF
Top View
Top View
Top View
1
2
3
1
2
3
1
2
3
TO 220
Ver: 1.6
Dec 31, 2002
TO252、263
、
SOT 223
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1)
Input Voltage……………………………………..…..…7V
Power Dissipation Internally Limited ….
(Note 2)
Maximum Junction Temperature…..…………… …..150°C
Storage Temperature Range….…..-65°C
≤
T
J
≤+150°C
Lead Temperature, Time for Wave Soldering
TO 220 Package………………………………260°C, 10s
TO 252, TO 263, SOT 223 Package…….…...260°C, 4s
Continuous Power Dissipation (T
A
= + 25°C)
SOT 223
(1)
……………………….….……….………..0.8W
TO 252
(1)
………..……………….……….….………..1.0W
TO 263
(1)
………..……………….……….….………..1.6W
Note
(1)
: See Recommended Minimum Footprint.
G950
Absolute Maximum Ratings
(Note 1)
Input Voltage…………………………………….3.3V~6V
Temperature Range……………………0°C
≤
T
J
≤125°C
Operating Conditions
Electrical Characteristics
V
IN
=5V, I
O
= 1A, C
IN
= 1µF, C
OUT
=10 µF, All specifications apply for T
A
= T
J
= 25°C. [Note 3]
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Ripple Rejection
Dropout Voltage
Short Circuit Current
Over Temperature
CONDITIONS
V
IN
= 5V, 10mA < I
O
< 1A
V
IN
= 3.3V, 10mA < I
O
< 500mA
3.3V < V
IN
< 6V, I
O
= 10mA
V
IN
= 5V, 10mA < I
O
< 1A
V
IN
= 3.3V, 10mA < I
O
< 500mA
200mA DC and 100mA AC, fo = 120Hz
V
IN
= 5V
f
i
= 120Hz,V
ripple
=2V
P-P
, Io = 100mA
I
O
= 1A
I
O
= 500mA
I
O
= 100mA
MIN
2.475
TYP
2.50
3
35
25
80
0.6
46
1.15
420
200
1.6
150
MAX
2.575
30
50
UNITS
V
mV
mV
mV
mΩ
mA
dB
V
mV
mV
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 re-
sistance,
θ
JA
, and ambient temperature T
A
. The maximum allowable power dissipation at any ambient tem-
perature 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 G950 in SOT 223 package,
θ
JA
is 156°C/W; in TO 263 package,
θ
JA
is 75°C/W, and in the TO 252 package,
θ
JA
is 125°C/W (See recommend minimum footprint). The safe
operation in SOT 223,TO 252 & TO 263 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 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: 1.6
Dec 31, 2002
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
Global Mixed-mode Technology Inc.
G950
Safe Operating Area of SOT-223
1200
1000
T
A
=25°C,Still Air
1oz Copper on SOT-223 Package
Mounted on recommended mimimum
footprint (R
θJA
=156°C/W)
Maximum Recommended Output Current
TA=25℃
TA=55℃
TA=85℃
Power Dissipation of SOT-223
1.0
0.9
0.8
Still Air
1oz Copper on SOT-223 Package
Mounted on recommend mimimum
footprint (R
θJA
=156°C/W)
Output Current (mA)
800
600
400
200
0
1.2
Power Dissipation (W)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
25
35
45
55
1.6
2.0
2.4
2.8
3.2
3.6
4.0
65
75
85
95 105 115 125
Input-Output Voltage Differential V
IN
-V
OUT
(V)
Note: V
IN
(max)
<= 6.5V
Amibent Temperature T
A
(°C)
Safe Operating Area of TO-252
1200
T
A
=25°C,Still Air
1oz Copper on TO-252 Package
1000
Mounted on recommended mimimum
footprint (R
θJA
=125°C/W)
Maximum Recommended Output Current
Power Dissipation of TO-252
1.2
1.1
1.0
0.9
Output Current (mA)
Power Dissipation (W)
800
600
400
200
0
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
TA=25℃
TA=55℃
TA=85℃
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
25
35
45
55
65
75
85
95 105 115 125
Still Air
1oz Copper on TO-252 Package
Mounted on recommend mimimum
footprint (R
θJA
=125°C/W)
Input-Output Voltaage Differential V
IN
-V
OUT
(V)
Note: V
IN
(max)
<= 6.5V
Amibent Temperature T
A
(°C)
Ver: 1.6
Dec 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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