G957 查看數據表（PDF） - Global Mixed-mode Technology Inc
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G957 Datasheet PDF : 8 Pages
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Global Mixed-mode Technology Inc.
G957
Absolute Maximum Ratings (Note 1)
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Power Dissipation Internally Limited
(Note 2)
Maximum Junction Temperature. . . . . . . . . . . . 150°C
Storage Temperature Range. . -65°C ≤ TJ ≤+150°C
Reflow Temperature (soldering, 10sec). . . . 260°C
Thermal Resistance Junction to Ambient, (θJA)
SOT-223. . . . . . . . . . . . . . . . . . . . . . . . . . 148°C/W
TO-220. . . . . . . . . . . . . . . . . . . . . . . . . . . . 76°C/W
TO-252. . . . . . . . . . . . . . . . . . . . . . . . . . . 124°C/W
Thermal Resistance Junction to Case, (θJC)
SOT-223 . . . . . . . . . . . . . . . . . . . . . . . . . . 22°C/W
TO-252 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7°C/W
Operating Conditions
(Note 1)
Input Voltage . . . . . . . . . . . . .. . . . . . . . . . . 2.7V~6.5V
Temperature Range. . . . . . . . . . . . .-40°C ≤ TA ≤85°C
Electrical Characteristics
VIN =3.3V, IO = 1A, CIN = 1µF, COUT =10µF, All specifications apply for TA = TJ = 25°C. [Note 3]
PARAMETER
CONDITION
MIN TYP
Output Voltage
Line Regulation
Load Regulation
Output Impedance
10mA < IO < 1A
3V < VIN < 6.5V, IO = 10mA
10mA < IO < 1A
200mA DC and 100mA AC, fo = 120Hz
1.47 1.5
---
6
---
19
---
80
Quiescent Current VIN = 3V
---
0.54
Ripple Rejection
Dropout Voltage
Output Current
fi = 120Hz,Vripple =1VP-P, Io = 100mA
---
IO = 0A
---
IO = 100mA
---
IO = 500mA
---
IO = 1A
---
Continuous Test,
TA = 25°C, TJ 150°C,
VOUT within ±2%
VIN = 3V(SOT-223)
VIN = 3.3V(SOT-223)
Minimum footprint
(0.0625 square inch)
Mounted on 0.53
square inch pcb area
660
1
54
1.13
1.14
1.21
1.32
---
---
Short Circuit Current
---
1.6
Over Temperature
---
150
MAX
1.53
30
50
---
1
---
---
---
---
1.5
---
---
---
---
UNIT
V
mV
mV
mΩ
mA
dB
V
mA
A
A
°C
Note 1:
Note2:
Note3:
Note4:
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, TJmax; total thermal resistance, θJA,
and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is Tjmax-TA / θJA. If
this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. For the
G957 in SOT-223 package, θJA is 148°C/W ; in the TO-252 package, θJA is 124°C/W; in the TO-220 package, θJA is
76°C/W (No heat sink).
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.
Definitions
Dropout Voltage
The input/output Voltage differential at which the regulator
output no longer maintains regulation against further re-
ductions in input voltage. Measured when the output
drops 100mV below its nominal value. Dropout voltage is
affected by junction temperature, load current and mini-
mum input supply requirements.
Line Regulation
The change in output voltage for a change in input voltage.
The measurement is made under conditions of low dissipa-
tion 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 regu-
lator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip and is
not delivered to the load.
Ver: 1.2
Jan 02, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
2
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