Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

SPX1583 Fiches technique(PDF) 3 Page - Sipex Corporation

No de pièce SPX1583
Description  1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
Download  5 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  SIPEX [Sipex Corporation]
Site Internet  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SPX1583 Fiches technique(HTML) 3 Page - Sipex Corporation

  SPX1583 Datasheet HTML 1Page - Sipex Corporation SPX1583 Datasheet HTML 2Page - Sipex Corporation SPX1583 Datasheet HTML 3Page - Sipex Corporation SPX1583 Datasheet HTML 4Page - Sipex Corporation SPX1583 Datasheet HTML 5Page - Sipex Corporation  
Zoom Inzoom in Zoom Outzoom out
 3 / 5 page
background image
Date: 5/14/04
SPX1583
BLOCK DIAGRAM
APPLICATIONS NOTES
The SPX1583 is designed as a high performance and low cost
solution for application requiring a lower dropout than
traditional NPN regulators.
The SPX1583 uses a separate input voltage VCTRL (VCTRL
VOUT+ 1.3V) to minimize the dropout voltage. This allows the
2.5V power for the load to come from a 3.3V system supply.
As added benefit this will reduce the heat dissipation, and
lower heatsink and cooling fan cost. A typical application
would use 5V for Vin and 3.3V for VCTRL from a motherboard
power supply to provide a nominal 2.5V output. Using the
sense pin allows to Kelvin measure the output, reducing
resistive-associated errors.
The SPX1583 can power the 2.5V core voltage for
microprocessors such as Pentium
, P55C, AMD5k86
and K6
 and the IBM PowerPC 603EV and 604EV
processors.
*The reduction of heat dissipation is a result of the increase of the regulator
efficiency (efficiency = VOUT / VIN).
Adjustable Regulator Design
1.25V reference voltage is being developed between the
SENSE pin and the ADJ pin of the SPX1583. Adding two
external resistors (see fig 1.) will allow setting the output
voltage from 1.25V to 6V. R1 is chosen so that this current is
specified minimum load current of 10mA. R2 is given by the
formula: VOUT = VREF (1+ R2/R1) + IADJ (R2). The current
flowing from the ADJ pin is typically 50
µA. This ADJ pin
contributes to the final VOUT but is usually neglected.
Connecting the sense pin to the top of the resistor divider will
improve load regulation.
Lowering Noise
Using the SENSE pin to Kelvin the load will increase accuracy
of the output voltage during load regulation. For the fixed
voltage devices, adding a capacitor at the GND pin will
improve transient response. This capacitor is chosen in the
range of 1
µF to 0.1µF and will depend on the amount of
output capacitance in the system.
PIN DESCRIPTION
1. Sense = Allows Kelvin sense of VOUT at the load. (Positive side of the reference voltage of the
device).
2. ADJ = Negative side of the reference voltage for the device. Adding a small bypass capacitor
from the ADJ pin to ground will improve the transient response.
3. VOUT = Power output of the device.
4. VCTRL = Supply pin for the control circuitry of the device. The current flow into this pin will be
about 1% of the output current. VCTRL must be between 1.0V and 1.3V greater than the output
voltage for the device to regulate.
5. VIN = Output load current is supplied through this pin. VIN must be between 0.1V and 0.8V
greater than the output voltage for the device to regulate.
(4) V
CTRL
V
IN (5)
S.O.A
V
OUT (3)
LIMIT
SENSE
CURRENT
LIMIT
AMPLIFIER
THERMAL OVERLOAD
VOLTAGE
REGULATION
AMPLIFIER
V
REF
SENSE (1)
ADJ (2)


Numéro de pièce similaire - SPX1583

FabricantNo de pièceFiches techniqueDescription
logo
Sipex Corporation
SPX1583 SIPEX-SPX1583 Datasheet
171Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
logo
Exar Corporation
SPX1583 EXAR-SPX1583 Datasheet
225Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator
logo
Sipex Corporation
SPX1583T SIPEX-SPX1583T Datasheet
171Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
SPX1583T-1.5 SIPEX-SPX1583T-1.5 Datasheet
171Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
SPX1583T-2.5 SIPEX-SPX1583T-2.5 Datasheet
171Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
More results

Description similaire - SPX1583

FabricantNo de pièceFiches techniqueDescription
logo
Sipex Corporation
SPX1583 SIPEX-SPX1583 Datasheet
171Kb / 5P
   1.5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
SPX1086 SIPEX-SPX1086 Datasheet
194Kb / 7P
   1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response
AS2815 SIPEX-AS2815 Datasheet
181Kb / 9P
   1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response
SPX2815 SIPEX-SPX2815 Datasheet
207Kb / 10P
   1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response
logo
Calogic, LLC
CLM2815 CALOGIC-CLM2815 Datasheet
84Kb / 6P
   1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output Fast Response
logo
Sipex Corporation
SPX29150 SIPEX-SPX29150 Datasheet
78Kb / 9P
   1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
SPX1580 SIPEX-SPX1580 Datasheet
148Kb / 5P
   7A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
SPX1582 SIPEX-SPX1582 Datasheet
147Kb / 5P
   3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
SPX1582T5-L-TR SIPEX-SPX1582T5-L-TR Datasheet
210Kb / 7P
   3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed
logo
Alpha & Omega Semicondu...
AS1581 AOSMD-AS1581 Datasheet
287Kb / 4P
   5A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable Fixed
More results


Html Pages

1 2 3 4 5


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com