G1084 Datasheet PDF - Global Mixed-mode Technology

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G1084
Global Mixed-mode Technology

Part Number G1084
Description 5A Adjustable Low-Dropout Linear Regulator
Page 11 Pages


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Global Mixed-mode Technology Inc.
G1084
5A Adjustable Low-Dropout Linear Regulator
Features
„ Available in Adjust Version
„ TO-220, TO-252,TO-263 and TO-263T
Package
„ Internal Short Circuit Current Limiting
„ Internal Over Temperature Protection
„ Output Current 5A
Applications
„ Post Regulation for Switching DC/DC Con-
verter
„ High Efficiency Linear Regulator
„ Battery Charger
„ Battery Powered Instrumentation
„ Motherboard
General Description
The G1084 is a low dropout linear regulator with a
dropout of 1.2V at 5A of load current. It is avail-
able in an adjustable version, which can set the
output from 1.25V to 5V with only two external
resistors.
The G1084 provides over temperature and over
current protection circuits to prevent it from being
damaged by abnormal operating conditions.
The G1084 is available in TO-220, TO-252, TO-263
and TO-263T packages. A minimum of 220µF
tantalum electrolytic capacitor is required at the
output to improve the transient response and sta-
bility.
Ordering Information
ORDER
NUMBER
ORDER NUMBER
(Pb free)
MARKING
TEMP. RANGE
PACKAGE
G1084T33T
G1084T43U
G1084T53U
G1084TU3U
G1084T33Tf
G1084T43Uf
G1084T53Uf
G1084TU3Uf
G1084
G1084
G1084
G1084
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TO-220
TO-252
TO-263
TO-263T
* For other package types and pin options, please contact us at sales@gmt.com.tw
Note: T3: TO-220 T4: TO-252 T5: TO-263 TU: TO-263T (thin)
3: Bonding Code
U: Tape & Reel T: Tube
1
GND/ADJ
GND/ADJ
GND/ADJ
GND/ADJ
PIN OPTION
23
VOUT
VOUT
VOUT
VOUT
VIN
VIN
VIN
VIN
Package Type
Top View
123
TO-252/
TO-263/TO-263T
Top View
12 3
TO-220
Typical Application
[Note 4]: Type of COUT
IO
VIN VIN G1084 VOUT
GND/ADJ
VOUT
C1
220µF
R1
R2
C22O0UµTF
Ver: 1.4
Jun 14, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1



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Global Mixed-mode Technology Inc.
G1084
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)
TO-252(1). . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
TO-263(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . .70°C/W
TO-263T(1) . . . . . . . . . . . . . . .. . . . . . . . . . . . 73°C/W
TO-220 No Heatsink . . . . . . . . . . . . . . . . . . 53°C/W
TO-220 with Infinite Heatsink(2). . . . . . . . . . . 23°C/W
Thermal Resistance Junction to Case, (θJC)
TO-220 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5°C/W
TO-252 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..8°C/W
TO-263 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5°C/W
TO-263T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5°C/W
ESD Rating (Human Body Model). . . . . . . . . . . .2kV
Operating Conditions
(Note 1)
(VIN-VADJ) Voltage . . . . . . . . . . . . . . . . . . . . . 2.5V~5.5V
Temperature Range . . . . . . . . . . . . . .-40°CTA85°C
Note (1): See Recommended Minimum Footprint
(2): Refer to heatsink package dimension.
Electrical Characteristics
Operating Conditions: VIN 5.5V, TA =TJ = 25°C unless otherwise specified. [Note3]
PARAMETER
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
Ripple Rejection
Temperature Stability
RMS Output Noise (% of VOUT)
Thermal Shutdown
Thermal Shutdown Hysteresis
CONDITION
VIN - VOUT = 2V, IOUT = 10mA
(VOUT + 1.5V) < VIN < 5.5V, IOUT = 10mA
(VIN - VOUT) = 2V, 10mA < IOUT <5A
ΔVOUT = 2%, IOUT = 5A
(VIN - VOUT) = 2V
VIN - VOUT = 2V, 10mA < IOUT < 5A
1.5V < (VIN - VOUT) < 5.25V
VIN - VOUT = 2V
f = 120Hz, COUT = 10µF Tantalum,
(VIN - VOUT) = 3V, IOUT = 1A
VIN = 4V, IO =10mA
TA = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA
Junction Temperature
MIN
1.225
---
---
---
---
---
10
---
TYP
1.250
0.5
0.04
1.3
5.4
0.15
---
80
--- 45
--- 0.3
--- 0.007
--- 150
--- 30
MAX
1.275
1
0.5
1.5
---
---
---
150
---
---
---
---
---
UNIT
V
%
%
V
A
µA
mA
µA
dB
%
%
°C
°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.
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.
Ver: 1.4
Jun 14, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
2



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Global Mixed-mode Technology Inc.
G1084
Definitions
Output Voltage
The G1084 provides an adjustable output voltage from
1.25V to 5V. with two external resistors. It can be for-
mulated as:
VOUT = 1.25V x (1+
IADJ = 80µA (TYP.)
R2
R1
) + IADJ x R2
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 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: 1.4
Jun 14, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
3



No Preview Available !

Global Mixed-mode Technology Inc.
G1084
Typical Performance Characteristics
(VIN-VOUT = 3V, VOUT = 1.25V, CIN = 220µF, COUT = 220µF, TA=25°C, unless otherwise noted.)
Line Transient Response
Load Transient Response
Short Circuit-Current
Output Noise
Ripple Rejection
70
60
50
40
1A
30
625mA
20 (VIN-VOUT)>Vdropout
10
Vripple<0.5VP-P
COUT = 220µF
0
10 100 1000
10000
Frequency (Hz)
100000
1000000
Line Regulation
1.275
1.270
1.265
1.260
1.255
T = 25°C
1.250
1.245
1.240
T = -25°
1.235
1.230
1.225
2.5 3 3.5 4 4.5 5 5.5 6
VIN (V)
Ver: 1.4
Jun 14, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
4



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