Ver: 1.4
Mar 03, 2005
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 0.65V @ I
O
= 600mA
Output current in excess of 600mA
Output voltage accuracy +2%
Quiescent current, typically 0.3mA
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 0.65V. A low quiescent
current is provided. 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.
Ordering Information
PIN OPTION
ORDER
NUMBER
ORDER NUMBER
(Pb free)
PACKAGE
1 2
3
G903T63U G903T63Uf
SOT223 GND
V
OUT
V
IN
G903T65U G903T65Uf
SOT223 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: SOT223
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
Package Type Typical Application
[Note 4]: Type of C
OUT
Top View
1
2
3
Top View
Top View
1
2
3
SOT-223
V
IN
G903
C1
1F
IQ
V
OUT
I
O
C
OUT
10F
Top View
Top View
1
2
3
Top View
Top View
1
2
3
SOT-223
V
IN
G903
C1
1F
IQ
V
OUT
I
O
C
OUT
10F
V
IN
G903
C1
1F
IQ
V
OUT
I
O
C
OUT
10F
Ver: 1.4
Mar 03, 2005
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.....................150C
Storage Temperature Range........-65C
T
J
+150C
Reflow Temperature (soldering, 10sec)............260C
Thermal Resistance Junction to Ambient, (
JA
)
SOT-223................................................147C/W
Thermal Resistance Junction to Case, (
Jc
)
SOT-223.................................................27C/W
Note
(1)
: See Recommended Minimum Footprint.
Operating Conditions
(Note 1)
Input Voltage...........................................4V ~ 6.5V
Temperature Range.......................-40C
T
A
85C
Electrical Characteristics
V
IN
=5V, I
O
= 600mA, C
IN
=10F, C
OUT
=10F. All specifications apply for T
A
= T
J
= 25C.[Note 3]
PARAMETER CONDITION MIN
TYP
MAX
UNIT
Output Voltage
10mA < I
O
<600mA
3.234
3.3
3.366
V
Line Regulation
4V < V
IN
< 6V, I
O
= 10mA
---
15
---
mV
10mA < I
O
< 600mA
---
20
---
Load Regulation
10mA < I
O
< 250mA
---
10
---
mV
Quiescent Current
V
IN
= 5V
---
0.3
---
mA
Ripple Rejection
f
i
= 120 Hz, 1V
P-P
, Io = 100mA
---
47
---
dB
I
O
= 600mA
---
0.65
---
Dropout Voltage
I
O
= 250mA
---
0.25
---
V
Output Current
---
600
---
mA
Short Circuit Current
---
0.65
---
A
Current Limit
0.8 A
Over Temperature
---
145
---
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 guaran-
teed specifications 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 re-
sistance,
JA
, and ambient temperature T
A
. The maximum allowable power dissipation at any ambient tem-
perature is T
jmax
-T
A
/
JA
. If this dissipation is exceeded, the die temperature will rise above 150C and IC will
go into thermal shutdown. The
JA
of SOT223 package is 147C/W (See Recommended Minimum Footprint).
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: 1.4
Mar 03, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G903
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
=+5V , C
IN
=10F, C
OUT
=10F, T
A
=25C , unless otherwise noted.)
3.27
3.28
3.29
3.3
3.31
3.32
3.33
3.34
0
100
200
300
400
500
600
Load Current (mA)
Output Voltage (
V
)
Line Transient
Ch1: Vout (offset=3.30V)
Ch2: Vin (offset=5.0V)
I
OUT
=100mA
Output Voltage vs. Load Current
Quiescent Current vs. Temperature
0
10
20
30
40
50
60
10
100
1000
10000
100000
1000000
Frequency (Hz)
Ripple Rejection (
d
B)
200
250
300
350
400
450
500
550
600
-15
5
25
45
65
85
105
125
Temperature
Dr
opout Voltage (
m
V)
I
L
=300mA
0
20
40
60
80
100
120
140
160
180
200
220
240
-45 -25
-5
15
35
55
75
95
115
Temperature (C)
Quiescent Cur
r
ent (
A)
V
IN
=6V
V
IN
=5V
100mA
300mA
600mA
Dropout Volatge vs. Temperature
Ripple Rejection vs. Frequency
Load Transient
Ver: 1.4
Mar 03, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G903
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
=5V, C
IN
=10F, C
OUT
=10F, T
A
=25C, unless otherwise noted.)
0
0.5
1
1.5
2
2.5
0.5
1.5
2.5
3.5
4.5
PCB Top Copper Area (in
2
)
Ma
x. D
i
ss
i
p
a
t
i
o
n
P
o
w
e
r
(
W
)
0
0.5
1
1.5
2
2.5
25
45
65
85
T
AMB
(C)
Max
.
D
i
ssi
pation P
o
w
e
r
(W)
A=0.5
A=1.0
A=1.5
A=2.0
A=2.5
A=3.0
A=3.5
A=4.0
A=4.5
A=5.0
SOT-223 Max. Power Dissipation
vs. PCB Top Copper Area
T
AMB
= 25C ; Still Air
SOT-223 Max. Power Dissipation
vs. T
AMB
(still air)
( Different PCB Top Copper Area )
Unit:in
2
Recommended Minimum Footprint
SOT-223
Ver: 1.4
Mar 03, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G903
Global Mixed-mode Technology Inc.
Package Information
SOT223 (T6) Package
MILLIMETERS INCHES
SYMBOLS
MIN MAX MIN MAX
A 1.55
1.80
0.061
0.071
A1 0.02 0.12
0.0008
0.0047
B 0.60
0.80
0.024
0.031
B1 2.90 3.10
0.114
0.122
C 0.24
0.32
0.009
0.013
D 6.30
6.70
0.248
0.264
E 3.30
3.70
0.130
0.146
e
2.30 BSC
0.090 BSC
e1
4.60 BSC
0.181 BSC
H 6.70
7.30
0.264
0.287
L
0.90 MIN
0.036 MIN
L2
0.06 BSC
0.0024 BSC
0 10 0 10
Taping Specification
PACKAGE Q'TY/REEL
SOT-223 2,500
ea
GMT Inc. does 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.
A
B
13
(4X)
A1
e1
e
E
B1
D
H
C
13
(4X)
L2
L
Feed Direction
SOT-223 Package Orientation
Feed Direction
SOT-223 Package Orientation
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