G940T21 Datasheet, PDF (2/8 Pages) Global Mixed-mode Technology Inc – 3.7V 400mA Low Dropout Regulator

Global Mixed-mode Technology Inc.
G940/G941
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
Operating Conditions
(Note 1)
Input Voltage………………………….…………….4V~7V
Temperature Range………………….…0°C ≤ T_J ≤125°C
Note ⁽¹⁾: See Recommended Minimum Footprint.
Electrical Characteristics
V_IN =5V, I_O = 400mA, C_IN = 1 µF, C_OUT =10 µF, All specifications apply for T_A = T_J = 25°C. [Note 3]
PARAMETER
CONDITIONS
Output Voltage Accuracy IO = 10mA
Line Regulation
VIN = 4V to 7V, IO = 50mA
Load Regulation
IO = 10mA to 400mA
Output Impedance
100mA DC and 100mA AC, fo = 120Hz
Quiescent Current
Ripple Rejection
Dropout Voltage
Short Circuit Current
VIN=5V
fi = 120 Hz, 1VP-P, Io = 100mA
IO = 400mA
IO = 100mA
Over Temperature
MIN
-2
-
-
-
-
-
-
-
-
-
TYP
-
0.08
-
100
0.6
42
0.8
130
0.76
125
MAX
+3
0.9
2.2
-
-
-
0.9
150
-
-
UNITS
%
%/V
%
mΩ
mA
dB
V
mV
A
°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.
Note2: The maximum power dissipation is a function of the maximum junction temperature, T_Jmax ; total thermal re-
sistance, θ_JA, and ambient temperature T_A. The maximum allowable power dissipation at any ambient tem-
perature is T_jmax-T_A / 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 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: [phone]
http://www.gmt.com.tw
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