Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G901
Global Mixed-mode Technology Inc.
3.3V 300mA Low Dropout Regulator
Features
Dropout voltage typically 0.45V @ I
O
= 300mA
Output current in excess of 300mA
Output voltage accuracy +3%
Quiescent current, typically 0.6mA
Internal short circuit current limit
Internal over temperature protection
Applications
CD
-
ROM
Modem
LAN Hub
Networking Appliances
Mouse
Keyboard
General Description
The G901 positive 3.3V voltage regulator features the
ability to source 300mA of output current with a dropout
voltage of typically 0.45V. 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
G901T21U SOT
89
V
OUT
GND V
IN
G901T24U SOT
89
GND
V
IN
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
T2 : SOT 89
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
SOT 89
G901
I
Q
+
I
O
V
OUT
V
IN
C
OUT
10F
C
IN
1F
Top View
1
2
3
SOT 89
Top View
1
2
3
SOT 89
G901
I
Q
+
I
O
V
OUT
V
IN
C
OUT
10F
C
IN
1F
G901
I
Q
+
I
O
+
I
O
V
OUT
V
IN
C
OUT
10F
C
IN
1F
Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G901
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(Note 1)
Input Voltage..................................................10V
Power Dissipation Internally Limited (Note2)
Maximum Junction Temperature......................150C
Storage Temperature Range.........-65C
T
J
+150C
Lead Temperature, Time for Wave Soldering
SOT89 Package.......................................260C, 4s
Continuous Power Dissipation (T
A
= + 25C)
SOT 89
(1)
......................................................0.5W
Note
(1)
: See Recommended Minimum Footprint.
Operating Conditions
(Note 1)
Input Voltage.............................................4V ~ 7V
Temperature Range.........................0C
T
J
125C
Electrical Characteristics
V
IN
=5V, I
O
= 300mA, C
IN
=1F, C
OUT
=10F. All specifications apply for T
A
= T
J
= 25C.[Note 3]
PARAMETER CONDITIONS MIN
TYP
MAX
UNITS
Output Voltage
5mA < I
O
<300mA
3.201 3.3 3.399 V
Line Regulation
4V < V
IN
< 6.5V, I
O
= 50mA
3 mV
Load Regulation
10mA < I
O
< 300mA
28 mV
Output Impedance
100mA DC and 100mA AC, f
O
= 120Hz
102 m
Quiescent Current
V
IN
= 5V
0.6 mA
Ripple Rejection
f
i
= 120 Hz, 1V
P-P
, Io = 100mA
42 dB
I
O
= 300mA
450
Dropout Voltage
I
O
= 50mA
50
100
mV
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 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
temperature 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. For the G901 in SOT89 package,
JA
is 250C/W(See recommend
minimum footprint). The safe operation in SOT 89, 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 pos-
sible.
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.
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
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G901
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
=5V , C
IN
=1F , C
OUT
=10F, T
A
=25C , unless otherwise noted.)
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
0
50
100
150
200
250
300
Load Current (mA)
Ground Current (mA)
3.250
3.270
3.290
3.310
3.330
3.350
3.370
3.390
3.410
0
50
100
150
200
250
300
Load Current (mA)
Output Voltage (V)
0
100
200
300
400
500
600
700
0
50
100
150
200
250
300
Load Current (mA)
Dropout Voltage (mV)
Line Transient
Load Transient
Output Voltage vs. Load Current
Ch1: Vout (offset=3.30V)
Ch2: Vin (offset=5.0V)
Iout=100mA
Ch1: Iout (400mA/div)
Ch2: Vout (offset=3.30V)
Dropout Voltage vs. Load Current
Ground Current vs. Load Current
Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G901
Global Mixed-mode Technology Inc.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
25
35
45
55
65
75
85
95
105 115 125
Amibent Temperature TA (C)
Power Dissipation (W)
Note: V
IN(max)
<= 6.5V
0
50
100
150
200
250
300
350
400
450
500
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
Input-Output Voltage Differential V
IN
-V
OUT
(V)
Output Current (mA)
TA=25
TA=55
TA=85
Maximum Recommended Output Current
Safe Operating Area of SOT-89
1oz Copper on SOT-89 Package
Mounted on recommended mimimum footprint (R
JA
=250/W )
T
A
=25C,Still Air
Maximum Power Dissipation of SOT-89
Recommend Minimum Footprint
Ver: 1.0
Mar 22, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G901
Global Mixed-mode Technology Inc.
Package Information
SOT- 89 (T2) Package
DIMENSIONS IN MILLIMETERS
DIMENSIONS IN INCHES
SYMBOLS
MIN NOM MAX MIN NOM MAX
A 1.40
1.50
1.60
0.055
0.059
0.063
A1 0.80 1.04 ----- 0.031 0.041 -----
b 0.36
0.42
0.48
0.014
0.016
0.048
b1 0.41 0.47 0.53
0.016
0.018
0.020
C 038
0.40
0.43
0.014
0.015
0.017
D 4.40
4.50
4.60
0.173
0.177
0.181
D1 1.40 1.60 1.75
0.055
0.062
0.069
HE ----- ----- 4.25 ----- ----- 0.167
E 2.40
2.50
2.60
0.094
0.098
0.102
e 2.90
3.00
3.10
0.114
0.118
0.122
Package Orientation
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.
Feed Direction
SOT 89 Package Orientation
Feed Direction
SOT 89 Package Orientation
D
D1
E
A1
HE
e
b
b
b1
A
POLISH
MATTE FINISH
C
POLISH
D
D1
E
A1
HE
e
b
b
b1
A
POLISH
MATTE FINISH
C
POLISH
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