Global Mixed-mode Technology G940, G941 Technology Manual
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Global Mixed-mode Technology Inc.
3.7V 400mA Low Dropout Regulator
G940/G941
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
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
ORDER NUMBER PACKAGE TYPE
G940T21U SOT 89 V
G941T24U SOT 89 GND VIN V
G940T73U SOT 23 GND V
1 2 3
GND V
OUT
*For other package types, pin options and package, please contact us at sales @gmt.com.tw
PIN OPTION
V
OUT
Order Number Identification
< 3.7V).
IN
IN
OUT
IN
GXXX XX X X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE PIN OPTION PACKING
T2 : SOT 89
T6 : SOT 223 1 : V
T7 : SOT 23 2 : V
T8 : µTO92 3 : GND V
4 : GND V
5 : V
6 : V
1 2 3
GND VIN T : Tube
OUT
VIN GND B : Bag
OUT
VIN
OUT
V
IN
GND V
IN
V
IN
GND
OUT
OUT
OUT
U & D : Tape & Reel D Direction
Typical Application Package Type
[Note 4] : Type of C
V
V
IN
IN
C1
C1
0.47µF
0.47µF
OUT
G940
G940
IQ
IQ
I
I
O
O
V
V
C
C
OUT
OUT
10µF
10µF
OUT
OUT
Top View
Top ViewTop View
Top ViewTop View
Top ViewTop View
1
1
1
1
SOT 89
SOT 89
3
3
3
3
2
2
2
2
223
223
、、、、
、、、、
Top View
Top View
Top View
Top View
2
2
1
1
µTO 92
µTO 92
Top View
Top View
3
3
3
3
1
1
SOT 23
SOT 23
2
2
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Absolute Maximum Ratings
Input Voltage……………………………..……..…..…10V
Power Dissipation Internally Limited ..(Note 2)
Maximum Junction Temperature………….….…...150°C
Storage Temperature Range…..…..…..-65°C ≤ T
Lead Temperature, Time for Wave Soldering
SOT 89, SOT23 Package….….…..……..…....260°C, 4s
Continuous Power Dissipation (T
SOT 23
SOT 89
(1)
Note
: See Recommended Minimum Footprint.
Electrical Characteristics
VIN =5V, IO = 400mA, CIN = 1 µF, C
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
Short Circuit Current - 0.76 - A
Over Temperature - 125 -
Note 1:
Note 2:
Note3:
Note4:
Global Mixed-mode Technology Inc.
(Note 1)
Operating Conditions
G940/G941
(Note 1)
Input Voltage………………………….…………….4V~7V
≤+150°C
J
= + 25°C)
(1)
…….…………………….….……….……...0.3W
(1)
……………………….………..………..…0.42W
A
Temperature Range………………….…0°C ≤ T
≤125°C
J
=10 µF, All specifications apply for TA = TJ = 25°C. [Note 3]
OUT
, Io = 100mA - 42 - dB
P-P
IO = 400mA - 0.8 0.9 V Dropout Voltage
I
= 100mA - 130 150 mV
O
°C
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.
The maximum power dissipation is a function of the maximum junction temperature, T
sistance,
perature is T
will go into thermal shutdown. For the G940/G941 in SOT 23 package,
θ
, and ambient temperature TA. The maximum allowable power dissipation at any ambient tem-
JA
θ
/
jmax-TA
. If this dissipation is exceeded, the die temperature will rise above 130°C and IC
JA
θ
is 350°C/W and in the SOT 89
JA
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).
Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as
possible.
The type of output capacitor should be tantalum or aluminum.
; total thermal re-
Jmax
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.
Ver: 5.5
May 13, 2002
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.
2
TEL: 886-3-5788833
http://www.gmt.com.tw
t
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN=5V, CIN=1µF, C
Ch1: Vout (offset=3.70V) Ch1: Iout (400mA/div)
Ch2: Vin (offset=5.0V) Ch2: Vout (offset=3.70V)
Iout=100mA
=10µF, TA=25°C, unless otherwise noted.)
OUT
Line Transient Load Transient
G940/G941
Output Voltage Accuracy vs. Load Curren
2.000%
1.500%
1.000%
0.500%
0.000%
-0.500%
Output Voltage Accuracy
-1.000%
0 50 100 150 200 250 300 350 4 00 4 50 500 550 600
Load Current (mA)
Ground Current vs. Load Current
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
Ground Current (mA)
0.2
0.0
0 50 1 00 150 200 250 300 350 400
Load Current (mA)
Dropout Voltage vs. Load Current
900
800
700
600
500
400
300
200
Dropout Voltage (mV)
100
0
0 50 100 150 200 250 300 350 400 450
Load Current (mA)
Ver: 5.5
May 13, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
3
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