Global Mixed-mode Technology Inc.
G9225
2.5V 2A Low Dropout Regulator with Disable
Features
Dropout voltage 0.5V @ I
O
= 2A
Output current in excess of 2A
Output voltage accuracy ±2.5%
Quiescent current, typically 2.5mA
Internal short circuit current limit
Internal over temperature protection
TO220 4pin Full-Mold package
ON/OFF control
General Description
The G9225 positive 2.5V voltage regulator features
the ability to source 2A of output current. The dropout
voltage is 0.5V at 2A output current. The typical qui-
escent current is 2.5mA. Furthermore, the quiescent
current is smaller when the regulator is in the dropout
mode.
Familiar regulator features such as over tem-
perature and over current protection circuits are
provided to prevent it from being damaged by
abnormal operating conditions. A V
EN
pin is pro-
vided to disable the output when needed.
Ordering Information
ORDER NUMBER
G9225TF1T
G9225TH1T
MARKING
G9225
G9225
TEMP. RANGE
-20°C to +85°C
-20°C to +85°C
PACKAGE
TO220F-4L
TO220F-4L
1
V
IN
V
IN
2
V
O
V
O
PIN OPTION
3
GND
GND
4
V
EN
V
EN
Order Number Identification
GXXXX
XX
X
X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
TF: TO220F-4L (short lead)
TH: TO220F-4L (long lead)
1
1.: V
IN
PIN OPTION
2
V
O
3
GND
4
V
EN
PACKING
T : Tube
Typical Application
R=5kΩ
V
EN
I
O
V
IN
C1
4.7µF
I
ENH
Package Type
TO220F-4L
V
OUT
C
OUT
47µF
G9225
IQ
Top View
R=5kΩ is recommended
R must be connected for current I
ENH
restriction as V
EN
> V
IN
+0.3V
V
IN
V
O
GND V
EN
1 2
3
4
Ver: 0.2 Preliminary
Jun 28, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1)
Input Voltage……………………….…….………..……..7V
V
EN
Voltage…………………………….……….…V
IN
+0.3V
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
TO220 Package……….…….….……….….….260°C, 10s
Continuous Power Dissipation (T
A
= +25°C)
TO220 No heatsink…….……….…………….…..…..1.5W
TO220 with infinite heatsink…………………….….…15W
G9225
Absolute Maximum Ratings
Operating Conditions
(Note 1)
Input Voltage…………………………….………..2.5V~7V
Temperature Range………….….........-20°C
≤
T
A
≤85°C
Electrical Characteristics
V
IN
=5V, I
O
= 0.5A, C
IN
= 4.7µF, C
OUT
=47µF, T
A
= T
J
= 25°C unless otherwise specified [Note 3]
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Ripple Rejection
Dropout Voltage
Short Circuit Current
Over Temperature
Disable Voltage High
Disable Voltage Low
Disable Bias Current High
Disable Bias Current Low
SYMBOL
I
O
=0.5A
CONDITION
3.3V < V
IN
< 7V, I
O
= 10mA
50mA < I
O
< 2A
V
IN
= 5V
fi = 120Hz, 1V
P-P
, I
O
= 100mA
I
O
= 2A
MIN
2.44
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2
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TYP
2.5
0.5
0.5
2.5
45
0.5
1.2
150
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MAX
2.56
2
2
5
---
0.7
---
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0.8
20
20
UNIT
V
%
%
mA
dB
V
A
°C
V
V
µA
µA
V
ENH
V
ENL
I
ENH
I
ENL
Output Active
Output Disabled
V
EN
= 2.7V
V
EN
0.4V
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.
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 TO220 package,
θ
JA
is 60°C/W (No heat sink).
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 fur-
ther reductions in input voltage. Measured when the
output drops 2% below its nominal value, dropout volt-
age is affected by junction temperature, load current
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 affected.
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
temperature 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: 0.2 Preliminary
Jun 28, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Embedded System
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