Ver: 1.0
Feb 18, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G903
Global Mixed-mode Technology Inc.
3.3V 600mA Low Dropout Regulator
Features
Dropout voltage typically 1.1V @ I
O
= 600mA
Output current in excess of 600mA
Output voltage accuracy +2%
Quiescent current, typically 0.6mA
Internal short circuit current limit
Internal over temperature protection
General Description
The G903 positive 3.3V voltage regulator features the
ability to source 600mA of output current with a dropout
voltage of typically 1.1V. 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.
Ordering Information
PIN OPTION
ORDER NUMBER
PACKAGE TYPE
1 2 3
G903T63U SOT
223
GND
V
OUT
V
IN
G903T65U SOT
223
V
IN
GND V
OUT
* For other package types, pin options and package, 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
PIN OPTION
PACKING
T6 : SOT 223
1
2
3
U & D : Tape & Reel Direction
1 : V
OUT
GND V
IN
T : Tube
2 : V
OUT
V
IN
GND
B : Bag
3 : GND
V
OUT
V
IN
4 : GND
V
IN
V
OUT
5 : V
IN
GND
V
OUT
6 : V
IN
V
OUT
GND
Typical Application Package Type
[Note 4]: Type of C
OUT
Top View
1
2
3
Top View
Top View
1
2
3
SOT 223
V
IN
G903
C1
1µF
IQ
V
OUT
I
O
C
OUT
10µF
Top View
Top View
1
2
3
Top View
Top View
1
2
3
SOT 223
V
IN
G903
C1
1µF
IQ
V
OUT
I
O
C
OUT
10µF
Ver: 1.0
Feb 18, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G903
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(Note 1)
Input Voltage………………………………..………….7V
Power Dissipation Internally Limited (Note2)
Maximum Junction Temperature…………………175°C
Storage Temperature Range..……-65°C
≤ T
J
≤+150°C
Lead Temperature, Time for Wave Soldering
SOT223 Package……………………..…..…...260°C, 4s
Continuous Power Dissipation (T
A
= + 25°C)
SOT 223
(1)
……………………….……………………0.8W
Note
(1)
: See Recommended Minimum Footprint.
Operating Conditions
(Note 1)
Input Voltage…………………………..…..……4V ~ 6.5V
Temperature Range………………….….0°C
≤ T
J
≤150°C
Electrical Characteristics
V
IN
=5V, I
O
= 600mA, C
IN
=10µF, C
OUT
=10µF. All specifications apply for T
A
= T
J
= 25°C.[Note 3]
PARAMETER CONDITIONS MIN
TYP
MAX
UNITS
Output Voltage
5mA < I
O
<600mA 3.234
3.3
3.366
V
Line Regulation
4V < V
IN
< 6.5V, I
O
= 10mA
10
30
mV
Load Regulation
10mA < I
O
< 600mA
60 80 mV
Output Impedance
100mA DC and 100mA AC, f
O
= 120Hz
102 mΩ
Quiescent Current
V
IN
= 5V
0.6
mA
Ripple Rejection
f
i
= 120 Hz, 1V
P-P
, Io = 100mA
42
dB
Dropout Voltage
I
O
= 600mA
1.1
1.3
V
Output Current
Continuous Test
T
A
= 25°C, T
J
< 150°C,
V
OUT
within ±2% (Note 2)
V
IN
= 4.6V, mounted on SOT-223 rec-
ommended minimum footprint
600 mA
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 Conditions are
conditions under which the device functions but the specifications might not be guaranteed. For guaranteed speci-
fications and test conditions see the Electrical Characteristics.
Note 2: The maximum power dissipation is a function of the maximum junction temperature, T
Jmax
; total thermal resis-
tance,
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. The
θ
JA
of SOT 223 package is 156°C/W (See Recommended Minimum Footprint). The safe operation
in SOT 223 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 volt-
age. The measurement is made under conditions of low
dissipation or by using pulse techniques such that av-
erage 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 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: 1.0
Feb 18, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G903
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
=5V, C
IN
=10µF, C
OUT
=10µF, T
A
=25°C, unless otherwise noted.)
0
100
200
300
400
500
600
700
800
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
Input-Output Voltage Differential VIN-VOUT (V)
Output Current (mA)
TA=25℃
TA=55℃
TA=85℃
1oz Copper on SOT-223 Package
Mounted on recommended mimimum footprint (RθJA=156℃/W)
TA=25℃,Still Air
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
25
35
45
55
65
75
85
95 105 115 125
Amibent Temperature TA (℃)
Power Dissipation (W)
Still Air
1oz Copper on SOT-223 Package
Mounted on recommend mimimum footprint (RθJA=156℃/W)
Maximum recommended output current
Note: VIN(max) <= 6.5V
