GMT G949T73U, G949T73T, G949T73D, G949T73B, G941T24U Datasheet
...
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 @ IO = 400mA
Output current in excess of 400mA
Output voltage accuracy +3%/-2%
Quiescent current, typically 600µA
Internal short circuit current limit
Internal over temperature protection
General Description
The G940/G941 positive 3.7V voltage regulator features the ability to source 400mA of output current
with a dropout voltage of typically 0.8V over the entire operating temperature range. A low quiescent
current is provided over the entire output current
range. The typical quiescent current is 0.6mA. Furthermore, 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 VIN 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 VIN T : Tube
T7 : SOT 23 2 : V
OUT
VIN GND B : Bag
T8 : µTO92 3 : GND V
OUT
VIN
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
µTO 92
Top View
SOT 23
1
3
2
Top ViewTop View
1
2
3
SOT 89
、、、、
223
Top View
2
V
IN
G940
C1
0.47µF
IQ
V
OUT
I
O
C
OUT
10µF
Top ViewTop View
1
2
3
Top View
1
3
µTO 92
Top View
SOT 23
1
3
2
Top ViewTop View
1
2
3
SOT 89
、、、、
223
Top View
2
V
IN
G940
C1
0.47µF
IQ
V
OUT
I
O
C
OUT
10µF
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………….….…...150°C
Storage Temperature Range…..…..…..-65°C ≤ T
J
≤+150°C
Lead Temperature, Time for Wave Soldering
SOT 89, SOT23 Package….….…..……..…....260°C, 4s
Continuous Power Dissipation (T
A
= + 25°C)
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………………….…0°C ≤ T
J
≤125°C
Electrical Characteristics
VIN =5V, IO = 400mA, CIN = 1 µF, C
OUT
=10 µF, All specifications apply for TA = TJ = 25°C. [Note 3]
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage Accuracy IO = 10mA -2 - +3 %
Line Regulation VIN = 4V to 7V, IO = 50mA - 0.08 0.9 %/V
Load Regulation IO = 10mA to 400mA - - 2.2 %
Output Impedance 100mA DC and 100mA AC, fo = 120Hz - 100 - mΩ
Quiescent Current VIN=5V - 0.6 - mA
Ripple Rejection fi = 120 Hz, 1V
P-P
, Io = 100mA - 42 - dB
IO = 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 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,
θ
JA
, and ambient temperature TA. The maximum allowable power dissipation at any ambient tem-
perature is T
jmax-TA
/
θ
JA
. If this dissipation is exceeded, the die temperature will rise above 130°C and IC
will go into thermal shutdown. For the G940/G941 in SOT 23 package,
θ
JA
is 350°C/W and in the SOT 89
package is 250°C/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 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 measurement 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: 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
(VIN=5V, CIN=1µF, C
OUT
=10µF, TA=25°C, 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 Curren
t
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 4 00 4 50 500 550 600
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 1 00 150 200 250 300 350 400
Load Current (mA)
Ground Current (mA)
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