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PDF G5E1284 Data sheet ( Hoja de datos )

Número de pieza G5E1284
Descripción 4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator
Fabricantes GTM 
Logotipo GTM Logotipo



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No Preview Available ! G5E1284 Hoja de datos, Descripción, Manual

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ISSUED DATE :2005/05/24
REVISED DATE :2006/03/29B
G5E1284
4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator
Description
The G5E1284 is 4A regulator with extremely low dropout voltage. This product is specifically designed to
provide well regulated supply for applications requiring 2.8V or lower voltages from 3.3V ATX power supplies
where high efficiency of the switch can be achieved without the cost and complexity associated with switching
regulator. One such application is the new graphic chipsets that requires anywhere from 2.4V to 2.7V supply.
Features
0.7V maximum dropout voltage at 4A load current
Built-in thermal shutdown
Output current limiting
Adjustable or fixed output voltage 1.5V,1.8V,2.5V,3.3V,5.0V
Fast transient response
Good noise rejection
Package Dimensions
Typical Application
REF.
A
b
c
D
E
L4
Millimeter
Min. Max.
4.40 4.80
0.76 1.00
0.36 0.50
8.60 9.00
9.80 10.4
14.7 15.3
REF.
L5
c1
L
e
L1
Ø
Millimeter
Min. Max.
6.20 6.60
1.25 1.45
13.25 14.25
1.70 REF.
2.60 2.89
3.71 3.96
Block Diagram
G5E1284-25
Pin Descriptions
Name
I/O
Adj (Gnd)
Vsense
I
Vin I
Vctrl
Vout
I
O
Description
A resistor divider from this pin to the Vout pin and ground sets the output voltage. (Gnd only for fixed mode)
The pin is the positive side of the reference that allows remote load sensing to achieve excellent load
regulation. 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 higher than Vout in order for the device to regulate.
This pin is the supply pin for the internal control circuit as well as the base drive for the pass transistor. This
pin must always by higher than the Vout pin in order the device to regulate. A minimum of 100uF capacitor
must be connected from this pin to ground to insure stability.
The output of the regulator. A minimum of 100uF capacitor must be connected from this pin to ground to
insure stability.
G5E1284
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