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Global Mixed-mode Technology Inc.
G1085-XX
3A Low-Dropout Linear Regulator
Features
Available in 1.5V, 1.8V, 2.5V, 3.3V version TO-220, TO-263 package Internal short circuit current limiting Internal over temperature protection Output current 3A
General Description
The G1085-XX is a low dropout linear regulator with a dropout of 0.8V at 3A of load current. It is available in three fixed voltages: 1.5V, 1.8V, 2.5V and 3.3V. Refer to the G1085 for the adjustable version. The G1085-XX provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. The G1085-XX is available in TO-220 and TO-263 packages. A minimum of 220F tantalum electrolytic capacitor is required at the output to improve the transient response and stability.
Applications
Post regulation for switching DC/DC converter High efficiency linear regulator Battery powered instrumentation Motherboard
Ordering Information
ORDER NUMBER
G1085-15T33T G1085-18T33T G1085-25T33T G1085-33T33T G1085-15T53U G1085-18T53U G1085-25T53U G1085-33T53U
ORDER NUMBER MARKING (Pb free)
G1085-15T33Tf G1085-18T33Tf G1085-25T33Tf G1085-33T33Tf G1085-15T53Uf G1085-18T53Uf G1085-25T53Uf G1085-33T53Uf G1085-15 G1085-18 G1085-25 G1085-33 G1085-15 G1085-18 G1085-25 G1085-33
TEMP. RANGE
-40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C
PACKAGE
TO-220 TO-220 TO-220 TO-220 TO-263 TO-263 TO-263 TO-263
1
GND GND GND GND GND GND GND GND
PIN OPTION 2 3
VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VIN VIN VIN VIN VIN VIN VIN VIN
* For other package types and pin options, please contact us at sales @gmt.com.tw
Order Number Identification
GXXXX-XX XX X X Packing Type Pin Option Package Type Voltage Part Number PACKAGE TYPE
T3: TO-220 T5: TO-263 3:
PIN OPTION
1 GND 2 VOUT 3 VIN
PACKING
U: Tape & Reel T: Tube
Package Type
Typical Application
[Note 4]: Type of COUT
G1085-XX
V IN V IN GND C1 220F C OUT 220F V OUT IO V OUT
Top View
Top View
TO-220
1
2
3
1
2
3
TO-263
Ver: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings (Note 1) Input Voltage..................................................8V 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 TO-220(1), TO-263(1)..................................92C/W Thermal Resistance Junction to Case TO-220,TO-263.........................................6C/W ESD Rating (Human Body Model).....................2kV
Note (1): See Recommended Minimum Footprint
G1085-XX
Operating Conditions (Note 1) Input Voltage...........................................2.2V~7V Temperature Range....................-40C TA 85C
Electrical Characteristics
VIN = 5V, CIN = COUT = 220F, TA = TJ = 25C unless otherwise specified. (Note3) PARAMETER CONDITION MIN
Output Voltage Line Regulation Load Regulation 10mA < IOUT < 3A (VOUT + 0.7V) < VIN < 5.5V, IOUT = 10mA G1085-18 VIN=3.8V, 10mA < IOUT < 3A G1085-25 VIN=5V, 10mA < IOUT < 3A G1085-33 VIN=5V, 10mA < IOUT < 3A G1085-18 VOUT = 2%, IOUT = 3A G1085-25 VOUT = 2%, IOUT = 3A G1085-33 VOUT = 2%, IOUT = 3A (VIN - VOUT) = 2V -2% --------------0.5 0.5 0.5 -------------
TYP
VO 0.1 1 1 0.8 0.65 5.5 1 1.7 2.1 2.4 50 92 92 6 6 150
MAX
2% 1 2 1.2 1 0.85 ----5 5 5 -------------
UNIT
V % %
Dropout Voltage Current Limit Short Circuit Current Quiescent Current
V A A mA dB C/W C/W C
G1085-18 VIN = 5V G1085-25 VIN = 5V G1085-33 VIN = 5V f = 120Hz, COUT = 10F Tantalum, Ripple Rejection (VIN - VOUT) = 3V, IOUT = 1A Thermal Resistor Junction-to-Ambient TO-220; Recommended Minimum Footprint (No heat sink; No air flow) TO-263; Recommended Minimum Footprint TO-220 Thermal Resistance Junction-to-Case TO-263 Thermal Shutdown Junction 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. 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 2% 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: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Electrical Characteristics
VIN-VOUT = 3V, CIN = 220F, COUT = 220F, TA=25C, unless otherwise noted.
G1085-XX
Line Transient Response
Load Transient Response
Short Circuit Current
70 60 Ripple Rejection (dB)
Ripple Rejection
IL=1A 50 40 30 20 10 0 10 100 1000 10000 100000 1000000 Frequency (Hz) IL=2A IL=3A
G1085-33 Overcurrent Protection Characteristics
G1085-33 Start-up
Ver: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G1085-18 Overcurrent Protection Characteristics
G1085-XX
G1085-18-Start-up
G1085 Max. Power Dissipation vs. PCB Top Copper Area
4.5 Max. Dissipation Power (W) Max. Dissipation Power (W) 4 3.5 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 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0
G1085 Max. Power Dissipation vs. TAMB
Unit : in2
A=0.5 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
25
35
45
55 65 TAMB (C)
75
85
G1085-18 Quiescent Current vs. Temperature
3.0
IL=10mA Quiescent Current (mA) Dropout Voltage (V) 2.0 1.8
G1085-18 Dropout Voltage vs. IL
2.5
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 TA=-25C 1 1.5 TA=25C TA=85C
2.0
1.5
VIN=4V
VIN=5V
1.0 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C)
0.0 2 IL (A) 2.5 3
Ver: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G1085-XX
G1085-18 Output Voltage vs. IL
G1085-18 Output Voltage vs. Temperature
1.825 IL=10mA Output Voltage (V) 1.824 1.814 1.804 1.794 1.784 1.774 1.764 5 15 25 35 45 55 Temperature (C) 65 75 85 0
1.820 Output Voltage (V)
1.815
1.810 IL=4A 1.805
IL=5A
VIN=4V
VIN=5V
TA=25C
1.800
0.5
1
1.5
2
2.5
3
IL (A)
G1085-33 Quiescent Current vs. Temperature
4.0 1400 1200 Quiescent Current (mA) 3.5 Dropout Voltage (mV) 1000 800 600 400
G1085-33 Dropout Voltage vs.IL
3.0
VIN=6V
2.5
VIN=5V
TA=85C 200 0 1.0 TA=-25C TA=25C 1.5 2.0 2.5 3.0
2.0 -25 -15 -5 5 15 25 35 45 55 65 75 85
Temperature (C)
IL (A)
G1085-33-Output Voltage vs. Temperature
3.334 3.334
G1085-33 Output Voltage vs. IL
TA=25C
3.314 Output Voltage (V)
Output Voltage (V)
VIN=6V
3.314 VIN=6V 3.294
3.294
3.274
VIN=5V
3.274 VIN=5V 3.254
3.254
IL=200mA
3.234 -25 -5 15 35 55 75 Temperature (C)
3.234 0 1
IL (A)
2
3
Ver: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G1085-25 Quiescent Current vs. Temperature
3.50 1800 1600 Quiescent Current (mA) 3.00 Dropout Voltage (mV) 1400 1200 1000 800 600 400 200 1.00 -25 -15 -5 5 15 25 35 45 55 65 75 85 Temperature (C) 0 1 1.5 2 IL (A) TA=-25C
G1085-XX
G1085-25 Dropout Voltage vs.IL
2.50
2.00 VIN=5V 1.50 VIN=6V
TA=85C TA=25C
2.5
3
G1085-25 Output Voltage vs. Temperature
2.55 2.59 2.57 Output Voltage (V) 2.55 2.53 2.51 2.49 2.47 2.45 -25 -5 15 35 55 75 Temperature (C) IL=10mA VIN=4V VIN=5V Output Voltage (V) 2.54 2.53 2.52 2.51 2.5 2.49 2.48 2.47 2.46 2.45 0
G1085-25 Output Voltage vs. IL
TA=25C
VIN=4V
VIN=5V
0.5
1
1.5 IL (A)
2
2.5
3
Recommend Minimum Footprint
TO-263
Ver: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
6
Global Mixed-mode Technology Inc.
Package Information
G1085-XX
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: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
A A1 L3
G1085-XX
E
D
H L1 C
e L2 e1 b b1 A2
L
TO-263 (T5) Package SYMBOL
A A1 A2 b b1 C D E e e1 H L L1 L2 L3
MILLIMETER MIN
4.30 1.22 2.45 0.69 1.22 0.36 8.64 9.70 2.29 4.83 14.60 4.70 1.20 2.24 1.40MAX
INCH MAX
4.70 1.32 2.69 0.94 1.40 0.56 9.652 10.54 2.79 5.33 15.78 5.84 1.778 2.84
MIN
0.169 0.048 0.104 0.027 0.048 0.014 0.340 0.382 0.090 0.190 0.575 0.185 0.047 0.088 0.055MAX
MAX
0.185 0.055 0.106 0.037 0.055 0.022 0.380 0.415 0.110 0.210 0.625 0.230 0.070 0.111
Taping Specification
PACKAGE
TO-220
F eed D irectio n TO -2 63 P a ck ag e O rien tatio n
Q'TY/REEL
----1,000 ea
Q'TY/TUBE
50 ea -----
TO-263
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: 0.5 Preliminary Nov 12, 2004
TEL: 886-3-5788833 http://www.gmt.com.tw
8

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