DatasheetsPDF.com

Positive Adjustable. GJ1085 Datasheet

DatasheetsPDF.com

Positive Adjustable. GJ1085 Datasheet






GJ1085 Adjustable. Datasheet pdf. Equivalent




GJ1085 Adjustable. Datasheet pdf. Equivalent





Part

GJ1085

Description

3A Low Dropout Positive Adjustable



Feature


www.DataSheet4U.com ISSUED DATE :2005/06 /01 REVISED DATE :2006/06/01C GJ1085 3 A Low Dropout Positive Adjustable or Fi xed-Mode Regulator The GJ1085 is a low dropout positive adjustable or fixed-mo de regulator with minimum of 3A output current capability. The product is spec ifically designed to provide well-regul ated supply for low voltage IC applicat ions such as high-.
Manufacture

GTM

Datasheet
Download GJ1085 Datasheet


GTM GJ1085

GJ1085; speed bus termination and low current 3. 3V logic supply. GJ1085 is also well su ited for other applications such as VGA cards. GJ1085 is guaranteed to have <1 .4V dropout at full load current making it ideal to provide well-regulated out puts of 1.25 to 5.0V with 4.7 to 12V in put supply by different output voltage. Description Features 3-Terminal Adj ustable or fixed 1.


GTM GJ1085

.5V,1.8V,2.5V,3.3V,5.0V 1.4V Maximum Dro pout at Full Load current Fast Transien t response Built-in Thermal Shutdown Ou tput current limiting Package Dimensio ns TO-252 REF. A B C D E F S Millimet er Min. Max. 6.40 6.80 5.20 5.50 6.80 7 .20 2.40 3.00 2.30 REF. 0.70 0.90 0.60 0.90 REF. G H J K L M R Millimeter Mi n. Max. 0.50 0.70 2.20 2.40 0.45 0.55 0 0.15 0.90 1.50 5..


GTM GJ1085

40 5.80 0.80 1.20 Typical Circuit 3.3V /3A 2.5V/3A Block Diagram GJ1085 Pa ge: 1/4 ISSUED DATE :2005/06/01 REVISE D DATE :2006/06/01C Pin Descriptions N ame Adj (GND) Vout O I/O Pin# 1 2 Adjus table (Ground only for fixed mode) The output of the regulator. A minimum of 1 0uF capacitor must be connected from th is pin to ground to insure stability. T he input pin of re.

Part

GJ1085

Description

3A Low Dropout Positive Adjustable



Feature


www.DataSheet4U.com ISSUED DATE :2005/06 /01 REVISED DATE :2006/06/01C GJ1085 3 A Low Dropout Positive Adjustable or Fi xed-Mode Regulator The GJ1085 is a low dropout positive adjustable or fixed-mo de regulator with minimum of 3A output current capability. The product is spec ifically designed to provide well-regul ated supply for low voltage IC applicat ions such as high-.
Manufacture

GTM

Datasheet
Download GJ1085 Datasheet




 GJ1085
www.DataSheet4U.com
ISSUED DATE :2005/06/01
REVISED DATE :2006/06/01C
GJ1085
3A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Description
The GJ1085 is a low dropout positive adjustable or fixed-mode regulator with minimum of 3A output current
capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications
such as high-speed bus termination and low current 3.3V logic supply. GJ1085 is also well suited for other
applications such as VGA cards. GJ1085 is guaranteed to have <1.4V dropout at full load current making it
ideal to provide well-regulated outputs of 1.25 to 5.0V with 4.7 to 12V input supply by different output voltage.
Features
3-Terminal Adjustable or fixed 1.5V,1.8V,2.5V,3.3V,5.0V
1.4V Maximum Dropout at Full Load current
Fast Transient response
Built-in Thermal Shutdown
Output current limiting
Package Dimensions
TO-252
Typical Circuit
3.3V/3A
Block Diagram
REF.
A
B
C
D
E
F
S
Millimeter
Min. Max.
6.40 6.80
5.20 5.50
6.80 7.20
2.40 3.00
2.30 REF.
0.70 0.90
0.60 0.90
REF.
G
H
J
K
L
M
R
Millimeter
Min. Max.
0.50 0.70
2.20 2.40
0.45 0.55
0 0.15
0.90 1.50
5.40 5.80
0.80 1.20
2.5V/3A
GJ1085
Page: 1/4




 GJ1085
ISSUED DATE :2005/06/01
REVISED DATE :2006/06/01C
Pin Descriptions
Name
I/O
Adj (GND)
Vout
O
Vin I
Pin#
1
2
3
Function
Adjustable (Ground only for fixed mode)
The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to
ground to insure stability.
The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground
to insure that the input voltage does not sag below the minimum dropout voltage during the load
transient response. This pin must always be 1.4V higher than Vout in order for the device to
regulate properly.
Absolute Maximum Ratings
Symbol
Parameter
Vin DC Supply Voltage
PD Power Dissipation
TST Storage Temperature
TOP Operating Junction Temperature Range
Ratings
-0.3 to 12
Internally Limited
-65 ~ + 150
0 ~ + 150
Unit
V
Electrical Characteristics
Parameter
Reference Voltage
Output Voltage
Line Regulator
Load Regulation
Dropout Voltage
(Vin-Vout)
Current Limit
Minimum Load Current
Adjust Pin Current
Quiescent Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Thermal Resistance
Junction–to-Ambient
(No heat sink ;No air flow)
GJ1085-ADJ
GJ1085-1.5
GJ1085-1.8
GJ1085-2.5
GJ1085-3.3
GJ1085-5.0
GJ1085-XXX
GJ1085ADJ
GJ1085-1.5
GJ1085-1.8
GJ1085-2.5
GJ1085-3.3
GJ1085-5.0
Conditions
Io=10mA, TJ =25 , (Vin-Vout )=1.5V
Io=10mA, TJ =25 , 3V Vin 12V
Io=10mA, TJ =25 , 3.3V Vin 12V
Io=10mA, TJ =25 , 4V Vin 12V
Io=10mA, TJ =25 , 4.8V Vin 12V
Io=10mA, TJ =25 , 6.5V Vin 12V
Io=10mA, Vout+1.5<Vin<12
Vin=3.3V, 0mA<Io<3A, TJ=25 (Note 1,2)
Vin=3.0V, 0mA<Io<3A, TJ=25 (Note 1,2)
Vin=3.3V, 0mA<Io<3A, TJ =25 (Note 1,2)
Vin=4.0V, 0mA<Io<3A, TJ=25 (Note 1,2)
Vin=5.0V, 0mA<Io<3A, TJ=25 (Note 1,2)
Vin=8.0V, 0mA<Io<3A, TJ=25 (Note 1,2)
GJ1085-XXX
Io=3A( Vout=1% Vout)
GJ1085-XXX
Vin-Vout=5V
Adjustable model
Vin=5V
Adjustable model
Vin=12V, Io=10mA
fixed model
Vin=12V, Io=0mA
TA=25 , 30ms pulse
F=120Hz, COUT=25uF, Tantalum, Io=3A
GJ1085-XXX
Vin=Vout+3V
Io=10mA
MIN
1.225
1.470
1.764
2.450
3.235
4.900
-
-
-
-
-
-
-
-
3.1
-
-
-
-
TYP
1.250
1.500
1.800
2.500
3.300
5.000
-
-
12
15
20
26
40
1.3
-
5
55
-
0.008
MAX
1.275
1.530
1.836
2.550
3.365
5.100
0.2
1
15
18
25
33
50
1.4
-
10
100
12
0.04
UNIT
V
V
V
V
V
V
%
%
mV
mV
mV
mV
mV
V
A
mA
uA
mA
%/W
- 60 70 dB
- 0.5 -
%
- 98 -
/W
Thermal Resistance
Junction-to-Case
Control Circuitry/Power Transistor
- 15 -
/W
Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured
at a constant junction Temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =1/18” from the
package.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the
difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full
input/output range.
GJ1085
Page: 2/4




 GJ1085
ISSUED DATE :2005/06/01
REVISED DATE :2006/06/01C
Functional Description
Introduction
The GJ1085 adjustable or fixed-mode Low Dropout (LDO) regulator is a 3 terminal device which can easily be programmed
by internal mask change to any voltage within the range of 1.25 to Vin-1.4V. The GJ1085 only needs 1.4V differential
between Vin and Vout to maintain output regulation, in addition, the output voltage tolerances are also extremely tight and
they include the transient response as port of the specification. For example, Intel VRE specification calls for a total of
100mV including initial tolerance, load regulation and 0 to 3A load step. The GJ1085 is specifically designed to meet the
fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with the need
for fewer output capacitors.
Load Regulation
Since the GJ1085 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the
load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode.
Stability
The GJ1085 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator
stable .For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient
response.
Thermal Design
The GJ1085 incorporates an internal shutdown that protects the device when the junction temperature exceeds the
maximum allowable junction temperatures. Although this device can operate with junction temperatures in the range of
150 , it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the
junction temperature is kept below the temperature.
Layout Consideration
The output capacitors must be located as close to the Vout terminal of the device as possible .It is recommended to use a
section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency
oscillation that may result due to excessive trace inductance.
GJ1085
Page: 3/4






Recommended third-party GJ1085 Datasheet






@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)