GMT G954-18TU5U 2a low dropout regulator Datasheet

G954
Global Mixed-mode Technology Inc.
2A Low Dropout Regulator
Features
General Description
„
The G954 is a high performance positive voltage
regulator designed for use in applications requiring
very low dropout voltage at up to 2 Amps. Since it has
superior dropout characteristics compared with regular
LDOs, it can be used to supply 2.5V on motherboards
or 1.5V, 1.8V on peripheral cards from the power supply thus allowing the elimination of costly heatsinks.
The G954 provides excellent regulation over variations
in line, load and temperature. It provides over current
and over temperature protection functions.
Fixed Output Voltage 1.2V, 1.5V, 1.8V and 2.5V
Over Current and Over Temperature Protection
„ Output Current 2A
„ TO-263 & TO-263T Package
„
Applications
„
„
„
„
„
„
Battery Powered Systems
Motherboards
Peripheral Cards
Network Cards
Set Top Boxes
Notebook Computers
ORDER
NUMBER
The G954 is available with 1.2V, 1.5V, 1.8V, 2.5V and
adjustable outputs in TO-263 & TO-263T package.
MARKING
VOLTAGE
TEMP.
RANGE
PACKAGE
(Pb free)
G954-12T55U
G954-15T55U
G954-12
G954-15
1.2V
1.5V
-40°C ~ +85°C
-40°C ~ +85°C
TO-263
TO-263
G954-18T55U
G954-25T55U
G954-12TU5U
G954-18
G954-25
G954-12
1.8V
2.5V
1.2V
-40°C ~ +85°C
-40°C ~ +85°C
-40°C ~ +85°C
TO-263
TO-263
TO-263T
G954-15TU5U
G954-15
1.5V
-40°C ~ +85°C
TO-263T
G954-18TU5U
G954-25TU5U
G954-18
G954-25
TU: TO-263T
1.8V
2.5V
-40°C ~ +85°C
-40°C ~ +85°C
TO-263T
TO-263T
Note: T5: TO-263
5: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
VIN
Top View
1
2
VO
G954
3
220µF
220µF
VIN GND VO
TO-263/TO-263T
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.9
Apr 24, 2007
1
G954
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Operation Conditions
(Note 1)
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . 2.2V ~5.5V
Temperature Range . . . . . . . . . . . .-40°C ≤TA ≤ +85°C
(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)
TO-263T(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .80°C/W
Thermal Resistance Junction to Case, (θJc)
TO-263T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8°C/W
ESD Rating (Human Body Model) . . . . . . . . . . . . 2kV
Note (1): See Recommended Minimum Footprint
Electrical Characteristics
VIN = 5V, IO = 0.5A, CIN = COUT = 220µF, TA = TJ = 25°C unless otherwise specified (Note 3)
PARAMETER
Supply Voltage
Output Voltage
Line Regulation
SYMBOL
VIN
VO
Load Regulation
Quiescent Current
Ripple Rejection
IQ
Dropout Voltage
VD
CONDITION
VIN = VO +0.7V, IO = 10mA
VO+0.7V < VIN < 5.5V, IO = 10mA
G954-12 VIN = 2.5V, 10mA < IOUT < 2A
G954-15 VIN = 2.5V, 10mA < IOUT < 2A
G954-18 VIN = 3.8V, 10mA < IOUT < 2A
G954-25 VIN = 5V, 10mA < IOUT < 2A
VIN = 5V
fi = 120Hz, 1VP-P, IO = 100mA
G954-15 ΔVOUT = 2%, IOUT = 2A
G954-18 ΔVOUT = 2%, IOUT = 2A
G954-25 ΔVOUT = 2%, IOUT = 2A
Short Circuit Current
Over Temperature
MIN
TYP
MAX
UNIT
2.2
-2
---
--VO
0.2
5.5
2
2
V
%
%
---
1
2
%
---------------
2.7
55
0.9
0.7
0.5
1
150
4.5
--1.1
0.9
0.7
-----
mA
dB
V
A
°C
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,
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.
Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.9
Apr 24, 2007
2
Global Mixed-mode Technology Inc.
G954
Definitions
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.
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.
Maximum Power Dissipation
The maximum total device dissipation for which the
regulator will operate within specifications.
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.
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
Ver: 0.9
Apr 24, 2007
3
G954
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
ViN-VOUT =3V, CIN = 220µF, COUT =220µF, TA = 25°C, unless otherwise noted.
Line Transient Response
Short Circuit Current
G954-18 Overcurrent Protection Characteristics
Ripple Rejection
70
Ripple Rejection (dB)
60
IL=1A
50
IL=2A
40
30
20
10
0
10
100
1000
10000
100000
1000000
Frequency (Hz)
G954-18-Start-up
G954-18-Start-up
TEL: 886-3-5788833
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Ver: 0.9
Apr 24, 2007
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G954
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Max. Power Dissipation vs. TAMB
4.5
4.5
4
4
Max. Dissipation Power (W)
Max. Dissipation Power (W)
Max. Power Dissipation
vs. PCB Top Copper Area
3.5
3
2.5
2
1.5
1
Unit : In2
A=0.5
A=1.0
3.5
A=1.5
3
A=2.0
2.5
A=2.5
2
A=3.0
1.5
A=3.5
1
A=4.0
0.5
0.5
0
0
A=4.5
A=5.0
0.5
1.5
2.5
3.5
4.5
25
35
45
55
65
TAMB (°C)
PCB Top Copper Area (in2)
75
85
G954-18 Dropout Voltage vs. IL
G954-18 Quiescent Current vs. Temperature
3.0
1.4
1.2
2.5
Dropout Voltage (V)
Quiescent Current (mA)
IL=10mA
2.0
1.0
0.8
0.6
0.4
1.5
VIN=4V
VIN=5V
0.2
1.0
TA=85°C
0.0
-25 -15 -5
5
15 25 35 45 55 65 75 85
Temperature (°C)
1
1.2
1.4
1.6
1.8
2
IL (A)
G954-18 Output Voltage vs. IL
G954-18 Output Voltage vs. Temperature
1.825
1.824
IL=10mA
1.814
Output Voltage (V)
1.820
Output Voltage (V)
TA=25°C
TA=-25°C
1.815
1.810
IL=5A
IL=4A
1.805
1.804
VIN=4V
1.794
VIN=5V
1.784
1.774
TA=25°C
1.764
1.800
5
15
25
35
45
55
Temperature (°C)
65
75
0
85
0.5
1
1.5
2
IL (A)
TEL: 886-3-5788833
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Ver: 0.9
Apr 24, 2007
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G954
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
G954-25 Dropout Voltage vs. IL
G954-25 Quiescent Current vs. Temperature
3.50
1000
900
800
Dropout Voltage (mV)
Quiescent Current (mA)
3.00
2.50
2.00
VIN=6V
VIN=5V
TA=85°C
700
600
500
400
300
TA=25°C
200
1.50
TA=-25°C
100
0
1.00
-25 -15 -5
5
15
25
35
45
55
65
75
1
85
1.2
1.4
1.6
1.8
2
IL (A)
Temperature (°C)
G954-25 Output Voltage vs. IL
G954-25 Output Voltage vs. Temperature
2.55
2.59
2.54
Output Voltage (V)
Output Voltage (V)
TA=25°C
2.53
2.57
2.55
2.53
2.51
VIN=5V
VIN=4V
2.49
2.52
2.51
2.5
2.49
VIN=4V
VIN=5V
2.48
2.47
2.47
IL=10mA
2.46
2.45
2.45
-25
-5
15
35
55
0
75
0.5
1
1.5
2
IL (A)
Temperature (°C)
Recommended Minimum Footprint
TO-263
TO-263T
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.9
Apr 24, 2007
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G954
Global Mixed-mode Technology Inc.
Package Information
A
D
c1
B
V
L3
E
b1
L
A1
L1
b
L2
e
e1
c
TO-263 (T5) Package
SYMBOL
A
A1
B
b
b1
c
c1
D
E
e
e1
L
L1
L2
L3
V
MILLIMETER
INCH
MIN
MAX
MIN
MAX
4.470
0.000
1.170
0.710
1.170
0.310
1.170
10.010
8.500
4.670
0.150
1.370
0.910
1.370
0.530
1.370
10.310
8.900
0.176
0.000
0.046
0.028
0.046
0.012
0.046
0.394
0.335
0.184
0.006
0.054
0.036
0.054
0.021
0.054
0.406
0.350
5.180
15.450
5.480
2.740
1.700
0.196
0.593
0.200
0.092
0.051
2.540 TYP
4.980
15.050
5.080
2.340
1.300
0.100 TYP
5.600 REF
0.204
0.608
0.216
0.108
0.067
0.220 REF
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.9
Apr 24, 2007
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G954
Global Mixed-mode Technology Inc.
A
D1
c1
B
V
E
L1
L
L3
L2
b
c
e
e1
TO-263T (TU) Package
SYMBOL
A
B
b
c
c1
D
E
e
e1
L
L1
L2
L3
V
DIMENSIONS IN MILLIMETER
MIN
NOM
1.750
0.880
1.255
0.381
0.356
9.660
8.380
--------13.74
----2.290
---------
2.000
1.280
1.295
0.406
0.406
10.160
8.680
2.540
5.080
14.240
4.280
2.540
----7.280
DIMENSIONS IN INCH
MAX
MIN
NOM
MAX
2.250
1.680
1.335
0.431
0.456
10.660
8.980
--------14.740
----2.790
1.778
-----
0.069
0.345
0.049
0.015
0.014
0.380
0.330
--------0.541
----0.090
---------
0.079
0.050
0.051
0.016
0.016
0.400
0.342
0.100
0.200
0.561
0.169
0.100
----0.287
0.089
0.066
0.053
0.017
0.018
0.420
0.354
--------0.580
----0.110
0.070
-----
Taping Specification
PACKAGE
Q’TY/REEL
TO-263
TO-263T
800 ea
1,500 ea
Feed Direction
TO-263/TO-263T Package Orientation
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.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.9
Apr 24, 2007
8
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