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PDF S5U1284 Data sheet ( Hoja de datos )
| Número de pieza | S5U1284 | |
| Descripción | 4A Ultra Low Dropout Positive Adjustable or Fixed-Mode Regulator | |
| Fabricantes | SeCoS | |
| Logotipo |  |
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Elektronische Bauelemente
S5U1284
4A Ultra Low Dropout
Positive Adjustable or Fixed-Mode Regulator
Description
RoHS Compliant Product
The S5U1284 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 compliexity 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 Max. Dropout Voltage At 4A Load Current
* Adjustable or Fixed Output Voltage 1.5V,1.8V,2.5V,3.3V,5.0V
* Output Current Limiting
* Good Noise Rejection
* Fast Transient Response
* Built-in Thermal Shutdown
Typical Circuit
REF.
A
b
L4
c
L1
E
Millimeter
Min. Max.
REF.
4.40 4.80 c2
0.66 0.91 L2
0.00 0.30 B D
0.36 0.5
e
2.29 2.79 L
9.80 10.4
Millimeter
Min. Max.
1.25 1.45
1.27 REF.
8.6 9.0
1.70 REF.
14.6 15.8
0˚ 8˚
S5U1284-25
Block Diagram
Pin Descriptions
Nam e
Adj (Gnd)
Vsense
Vin
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)
I
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
I 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
I 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.
O
The output of the regulator. A minimum of 100uF capacitor must be connected from this pin to ground to
insure stability.
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 1 of 4
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet S5U1284.PDF ] | |
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