View G957_627343.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Global Mixed-mode Technology Inc.
G957
1.5V 1A Regulator
Features
Output current in excess of 1A Output voltage accuracy 2.0% Quiescent current, typically 0.54mA Internal short circuit current limit Internal over temperature protection
General Description
The G957 positive 1.5V voltage regulator features the ability to source 1A of output current. The typical quiescent current is 0.54mA.
Applications
PC motherboard ADSL/Cable Modem Set-Top-Box LAN switch/Hub Broad band access
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 ORDER NUMBER MARKING NUMBER (Pb free)
G957T35T G957T45U G957T65U G957T35Tf G957T45Uf G957T65Uf 957T35 957T45 957T65
TEMP.
RANGE
-40C~85C -40C~85C -40C~85C
PACKAGE
TO-220 TO-252 SOT-223
1
VIN VIN VIN
PIN OPTION 2
GND GND GND
3
VOUT VOUT VOUT
* For other package types and pin options, 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
T3: TO-220 T4: TO-252 T6: SOT-223 1 1: VOUT 2: VOUT 3: GND 4: GND 5: VIN 6: VIN
PIN OPTION
2 GND VIN VOUT VIN GND VOUT 3 VIN GND VIN VOUT VOUT GND
PACKING
U: Tape & Reel T: Tube
Package Type
Typical Application
[Note 4]: Type of COUT
IO Top View Top View VIN
G957
C1 1F IQ
VOUT COUT 10F
Top View
1
23
1
2
3
1
2
3
TO-220
TO-252
SOT-223
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings (Note 1) Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature. . . . . . . . . . . . 150C Storage Temperature Range. . -65C TJ +150C Reflow Temperature (soldering, 10sec). . . . 260C Thermal Resistance Junction to Ambient, (JA) SOT-223. . . . . . . . . . . . . . . . . . . . . . . . . . 148C/W TO-220. . . . . . . . . . . . . . . . . . . . . . . . . . . . 76C/W TO-252. . . . . . . . . . . . . . . . . . . . . . . . . . . 124C/W Thermal Resistance Junction to Case, (JC) SOT-223 . . . . . . . . . . . . . . . . . . . . . . . . . . 22C/W TO-252 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7C/W Electrical Characteristics Operating Conditions
G957
(Note 1) Input Voltage . . . . . . . . . . . . .. . . . . . . . . . . 2.7V~6.5V Temperature Range. . . . . . . . . . . . .-40C TA 85C
VIN =3.3V, IO = 1A, CIN = 1F, COUT =10F, All specifications apply for TA = TJ = 25C. [Note 3] PARAMETER CONDITION MIN TYP MAX
Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Ripple Rejection Dropout Voltage 10mA < IO < 1A 3V < VIN < 6.5V, IO = 10mA 10mA < IO < 1A 200mA DC and 100mA AC, fo = 120Hz VIN = 3V fi = 120Hz,Vripple =1VP-P, Io = 100mA IO = 0A IO = 100mA IO = 500mA IO = 1A Minimum footprint VIN = 3V(SOT-223) Continuous Test, (0.0625 square inch) TA = 25C, TJ 150C, Mounted on 0.53 VOUT within 2% VIN = 3.3V(SOT-223) square inch pcb area 1.47 ------------------660 1 ----1.5 6 19 80 0.54 54 1.13 1.14 1.21 1.32 ----1.6 150 1.53 30 50 --1 --------1.5 ---------
UNIT
V mV mV m mA dB V
mA A A C
Output Current Short Circuit Current Over Temperature
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. Note2: The maximum power dissipation is a function of the maximum junction temperature, TJmax; total thermal resistance, JA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is Tjmax-TA / JA. If this dissipation is exceeded, the die temperature will rise above 150C and IC will go into thermal shutdown. For the G957 in SOT-223 package, JA is 148C/W ; in the TO-252 package, JA is 124C/W; in the TO-220 package, JA is 76C/W (No heat sink). 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. Ver: 1.2 Jan 02, 2006
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. TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN= +3.3V, CIN=1F, COUT=10F, TA=25C, unless otherwise noted.)
G957
Load Transient Response
Line Transient Response
Short Circuit Current
60
Ripple Rejection
IL=10mA 50
Ripple Rejection (dB)
40 30 20 10 0
10
IL=1A IL=500mA
V IN=3.5V COUT =10F V ripple=224mV
100
1000
10000
100000
1000000
Frequency (Hz)
Overcurrent Protection Characteristics
Start-up
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Quiescent Current vs. Temperature
1.50 1.25
Quiescent Current (mA)
G957
Dropout Voltage vs. IL
1.188
1.00 V IN=6.0V 0.75 0.50 0.25 0.00 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) V IN=5.0V
Dropout Voltage (V)
1.157 TA=25C 1.126 TA =85C
1.094 TA =-25C 1.063 0 0.25 0.5 IL (A) 0.75 1
Output Voltage vs. Temperature
1.525 1.520
Output Voltage (V)
Output Voltage vs. VIN
1.53 IL=10mA TA =85C
IL=10mA
Output Voltage (V)
1.525 1.52 1.515 1.51 1.505 1.5
1.515 1.510 1.505 1.500 V IN=4.0V 1.495 -25 -10 5 20 35 50 65 80 Temperature( C)
V IN=5.0V
TA =25C
1.495 3.5 4 4.5 5 5.5 V IN (V)
TA =-25C 6 6.5 7
SOT-223 Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air
3 2.5
Max. Dissipation Power (W)
SOT-223 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
3 2.5 2 1.5 1 0.5 0
Unit : in2 A=0.5
Max. Dissipation Power (W)
A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 A=5.0
2 1.5 1 0.5 0 0.5 1.5 2.5 3.5 4.5 PCB Top Copper Area (in2)
25
45 TAMB (C)
65
85
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
TO-252 Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air
4 3.5
Max. Dissipation Power (W)
G957
TO-252 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
4 3.5
Max. Dissipation Power (W)
Unit:in2 A=0.5 A=1.0 A=1.5 A=2.0 A=2.5
3 2.5 2 1.5 1 0.5 0 0.5 1.5 2.5 3.5 PCB Top Copper Area (in2) 4.5
3 2.5 2
A=3.0
1.5 1 0.5 0 25 45 TAMB ( C) 65 85
A=3.5 A=4.0 A=4.5 A=5.0
TO-220 Max. Power Dissipation vs. Temperature
5 4.5
Max. Power Dissipation (W)
Heatsink Package Dimension
TO-220
4 3.5 3 2.5 2 1.5 1 0.5 0 -45 -15
Heatsink
Without Heatsink
15 45 75 Temparature ( C)
105
Recommended Minimum Footprint
SOT-223 TO-252
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Package Information
G957
E A E1 E1 DIA F d D
D1
I
L
e b e1 b1
C A1
TO-220 (T3) Package SYMBOL
A A1 b b1 C D D1 d E E1 DIA e e1 F L I
MILLIMETER MIN
4.318 2.46 0.69 1.143 0.304 3.429 8.53 2.62 9.906 4.953 3.708 2.29 4.83 1.143 13.589 3.56
INCH MAX
4.826 2.72 0.94 1.397 0.460 3.683 9.04 2.87 10.40 5.22 3.962 2.79 5.33 1.397 14.351 4.06
MIN
0.170 0.097 0.027 0.045 0.012 0.135 0.336 0.103 0.390 0.195 0.146 0.090 0.190 0.045 0.535 0.140
MAX
0.190 0.107 0.037 0.055 0.018 0.145 0.356 0.113 0.410 0.206 0.156 0.110 0.210 0.055 0.565 0.16
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
6
Global Mixed-mode Technology Inc.
A E b2 L2 Seating Plane D H L1 A1 c1
G957
L3 L b e e1 b1 c
E1
BACK VIEW Z-Z
TO-252 (T4) Package SYMBOL
A A1 b b1 b2 c c1 D E E1 e e1 H L L1 L2 L3
MILLIMETERS MIN.
2.19 0.89 0.64 0.76 5.21 0.46 0.46 5.97 6.35 MIN 4.32 2.28 BSC 4.57 BSC 9.40 0.51 0.64 0.88 1.15 10.42 ----1.02 1.27 1.52 0.370 0.020 0.025 0.035 0.045
INCHES MAX.
2.38 1.14 0.88 1.14 5.46 0.58 0.58 6.22 6.73
MIN.
0.086 0.035 0.025 0.030 0.205 0.018 0.018 0.235 0.250 MIN 0.170 0.090 BSC 0.180 BSC
MAX.
0.094 0.045 0.035 0.045 0.215 0.023 0.023 0.244 0.265
0.410 ----0.040 0.050 0.060
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
A D B1 C
G957
13(4X)
H
E
L e e1 L2
13(4X)
A1 B
SOT-223 (T6) Package SYMBOL
A A1 B B1 C D E e e1 H L L2 6.70 0.90 MIN 0.06 BSC 0 10 0
MILLIMETER MIN
1.55 0.02 0.60 2.90 0.24 6.30 3.30 2.30 BSC 4.60 BSC 7.30 0.264
INCH MAX
1.80 0.12 0.80 3.10 0.32 6.70 3.70
MIN
0.061 0.0008 0.024 0.114 0.009 0.248 0.130 0.090 BSC 0.181 BSC
MAX
0.071 0.0047 0.031 0.122 0.013 0.264 0.146
0.287 0.036 MIN 0.0024 BSC 10
Taping Specification
PACKAGE
TO-220 TO-252 SOT-223
Feed Direction TO-252 Package Orientation Feed Direction SOT-223 Package Orientation
Q'TY/REEL
----2,500 ea 2,500 ea
Q'TY/TUBE
50 ea -----
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.
Ver: 1.2 Jan 02, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
8

▲Up To Search▲

Price & Availability of G957

	To Download G957 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .