Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G940/G941
Global Mixed-mode Technology Inc.
3.7V 400mA Low Dropout Regulator
Features
Dropout voltage typically 0.8V @ I
O
= 400mA
Output current in excess of 400mA
Output voltage accuracy +3%/-2%
Quiescent current, typically 600A
Internal short circuit current limit
Internal over temperature protection
General Description
The G940/G941 positive 3.7V voltage regulator fea-
tures the ability to source 400mA of output current
with a dropout voltage of typically 0.8V over the en-
tire operating temperature range. A low quiescent
current is provided over the entire output current
range. The typical quiescent current is 0.6mA. Fur-
thermore, the quiescent current is smaller when the
regulator is in the dropout mode (V
IN
< 3.7V).
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
G940T21U SOT
89
V
OUT
GND V
IN
G941T24U SOT
89
GND
V
IN
V
OUT
G940T73U SOT
23
GND
V
OUT
V
IN
*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 D Direction
T6 : SOT 223
1 : V
OUT
GND V
IN
T : Tube
T7 : SOT 23
2 : V
OUT
V
IN
GND
B : Bag
T8 : TO92
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
1
3
TO 92
Top View
SOT 23
1
3
2
Top View
Top View
1
2
3
SOT 89
223
Top View
2
V
IN
G940
C1
0.47F
IQ
V
OUT
I
O
C
OUT
10F
Top View
Top View
1
2
3
Top View
1
3
TO 92
Top View
SOT 23
1
3
2
Top View
Top View
1
2
3
SOT 89
223
Top View
2
V
IN
G940
C1
0.47F
IQ
V
OUT
I
O
C
OUT
10F
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G940/G941
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(Note 1)
Input Voltage...................................................10V
Power Dissipation Internally Limited ..(Note 2)
Maximum Junction Temperature.......................150C
Storage Temperature Range...............-65C
T
J
+150C
Lead Temperature, Time for Wave Soldering
SOT 89, SOT23 Package............................260C, 4s
Continuous Power Dissipation (T
A
= + 25C)
SOT 23
(1)
.......................................................0.3W
SOT 89
(1)
.....................................................0.42W
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
= 400mA, C
IN
= 1 F, C
OUT
=10 F, All specifications apply for T
A
= T
J
= 25C. [Note 3]
PARAMETER CONDITIONS MIN
TYP
MAX
UNITS
Output Voltage Accuracy I
O
=
10mA -2
-
+3
%
Line Regulation
V
IN
= 4V to 7V, I
O
= 50mA
-
0.08
0.9
%/V
Load Regulation
I
O
= 10mA to 400mA
-
-
2.2
%
Output Impedance
100mA DC and 100mA AC, fo = 120Hz
-
100
-
m
Quiescent Current
V
IN
=5V -
0.6
-
mA
Ripple Rejection
f
i
= 120 Hz, 1V
P-P
, Io = 100mA
-
42
-
dB
I
O
= 400mA
-
0.8
0.9
V
Dropout Voltage
I
O
= 100mA
-
130
150
mV
Short Circuit Current
-
0.76
-
A
Over
Temperature
- 125 -
C
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Condi-
tions 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 tem-
perature is T
jmax
-T
A
/
JA
. If this dissipation is exceeded, the die temperature will rise above 130C and IC
will go into thermal shutdown. For the G940/G941 in SOT 23 package,
JA
is 350C/W and in the SOT 89
package is 250C/W (See Recommend Minimum Footprint). The safe operation in SOT 23 & SOT 89
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.
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: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G940/G941
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
=5V, C
IN
=1F, C
OUT
=10F, T
A
=25C, unless otherwise noted.)
Ch1: Vout (offset=3.70V)
Ch1: Iout (400mA/div)
Ch2: Vin (offset=5.0V)
Ch2: Vout (offset=3.70V)
Iout=100mA
Ground Current vs. Load Current
Line Transient
Load Transient
Output Voltage Accuracy vs. Load Current
Dropout Voltage vs. Load Current
0
100
200
300
400
500
600
700
800
900
0
50
100
150
200
250
300
350
400
450
Load Current (mA)
Dropout Voltage (mV)
-1.000%
-0.500%
0.000%
0.500%
1.000%
1.500%
2.000%
0
50
100 150 200 250 300 350 400 450 500 550 600
Load Current (mA)
Output Voltage Accuracy
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
50
100
150
200
250
300
350
400
Load Current (mA)
Ground Current (mA)
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G940/G941
Global Mixed-mode Technology Inc.
Recommend Minimum Footprint
Note: V
IN(max)
<= 6.5V
Safe Operating Area
[Power Dissipation Limit]
0
50
100
150
200
250
300
350
400
450
500
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
Input-Output Voltage Differential V
IN
-V
OUT
(V)
Output Current (mA)
TA=25
TA=55
TA=85
Maximum Recommended Output Current
Maximum Power Dissipation of SOT 89
0
0.1
0.2
0.3
0.4
0.5
0.6
25
35
45
55
65
75
85
95
105
115
125
Amibent Temperature T
A
(C)
Power Dissipation (W)
Note: V
IN(max)
<= 6.5V
Safe Operating Area
[Power Dissipation Limit]
0
50
100
150
200
250
300
350
400
450
500
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
Input-Output Voltage Differential V
IN
-V
OUT
(V)
Output Current (mA)
TA=25
TA=55
TA=85
Maximum Recommended Output Current
0.0
0.1
0.2
0.3
0.4
0.5
25
35
45
55
65
75
85
95
105
115
125
Amibent Temperature T
A
(C)
Power Dissipation (W)
Maximum Power Dissipation of SOT 23
T
A
=25C,Still Air
1oz Copper on SOT 23 Package
Mounted on recommended mimimum footprint (RJA=350C/W)
Still Air
1oz Copper on SOT 23 Package
Mounted on recommend mimimum footprint (RJA=350C/W)
T
A
=25C,Still Air
1oz Copper on SOT 89 Package
Mounted on recommended mimimum footprint (RJA=250C/W)
Still Air
1oz Copper on SOT 89 Package
Mounted on recommend mimimum footprint (RJA=250C/W)
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G940/G941
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
D
D1
E
A1
HE
e
b
b
b1
A
POLISH
MATTE FINISH
C
POLISH
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
6
G940/G941
Global Mixed-mode Technology Inc.
SOT-223 (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
A
B
13
(4X)
A1
e1
e
E
B1
D
H
C
13
(4X)
L2
L
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
7
G940/G941
Global Mixed-mode Technology Inc.
SOT-23 (T7) Package
Note:
1.
Package body sizes exclude mold flash protrusions or gate burrs
2.Tolerance 0.1000 mm (4mil) unless otherwise specified
3.Coplanarity: 0.1000mm
4.Dimension L is measured in gage plane
DIMENSIONS IN MILLIMETERS
SYMBOLS
MIN NOM MAX
A 1.00 1.10 1.30
A1 0.00 ----- 0.10
A2 0.70 0.80 0.90
b 0.35
0.40
0.50
C 0.10 0.15 0.25
D 2.70 2.90 3.10
E 1.40 1.60 1.80
e -----
1.90(TYP)
-----
H 2.60 2.80 3.00
L 0.37
------ -----
1
1 5 9
H
D
e
E
L
C
1
b
A2
A
A1
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
8
G940/G941
Global Mixed-mode Technology Inc.
TO-92 (T8) Package
DIMENSIONS IN MILLIMETERS
DIMENSIONS IN INCHES
SYMBOLS
MIN NOM MAX MIN NOM MAX
A 2.40
2.50
2.60
0.094
0.098
0.102
A1 0.70 0.80 0.90
0.028
0.032
0.036
b 0.35
0.45
0.55
0.014
0.018
0.022
C ----- 0.40 ----- ----- 0.016
-----
D 2.80
3.00
3.20
0.110
0.118
0.126
E 3.80
4.00
4.20
0.149
0.157
0.165
e ----- 1.27 ----- ----- 0.050
-----
F 1.91
2.11
2.31
0.075
0.083
0.091
G 3.35
3.55
3.75
0.132
0.140
0.148
H 0.00 ----- 0.15
0.000
----- 0.006
L 13.80 14.00 14.20 0.543 0.551 0.559
1
----- 2 ----- ----- 2
-----
2
----- 5 ----- ----- 5 -----
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 23 Package Orientation
Feed Direction
SOT 23 Package Orientation
Feed Direction
SOT 89
223 Package Orientation
Feed Direction
SOT 89
223 Package Orientation
E
D
L
H
e
b
2 (2 X)
1(2 X)
C
G
A1
A
R2
.00
E
D
L
H
e
b
2 (2 X)
1(2 X)
C
G
A1
A
R2
.00
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