Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

FAN1582PX Scheda tecnica(PDF) 6 Page - Fairchild Semiconductor

Il numero della parte FAN1582PX
Spiegazioni elettronici  3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN1582PX Scheda tecnica(HTML) 6 Page - Fairchild Semiconductor

Back Button FAN1582PX Datasheet HTML 2Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 3Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 4Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 5Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 6Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 7Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 8Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 9Page - Fairchild Semiconductor FAN1582PX Datasheet HTML 10Page - Fairchild Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 12 page
background image
FAN1582
PRODUCT SPECIFICATION
6
REV. 1.1.2 2/26/03
pin of the FAN1582 for low ripple and fast transient response.
When these bypassing capacitors are not used at the adjust pin,
smaller values of output capacitors provide equally good results.
Protection Diodes
In normal operation, the FAN1582 series does not require any
protection diodes. For the FAN1582, internal resistors limit
internal current paths on the adjust pin. Therefore, even with
bypass capacitors on the adjust pin, no protection diode is
needed to ensure device safety under short-circuit conditions.
A protection diode between the input and output pins is usu-
ally not needed. An internal diode between the input and the
output pins on the FAN1582 series can handle microsecond
surge currents of 50A to 100A. Even with large value output
capacitors it is difficult to obtain those values of surge cur-
rents in normal operation. Only with large values of output
capacitance, such as 1000µF to 5000µF, and with the input
pin instantaneously shorted to ground can damage occur. A
crowbar circuit at the input can generate those levels of current;
a diode from output to input is then recommended, as shown
in Figure 1. Usually, normal power supply cycling or system
“hot plugging and unplugging” will not generate current
large enough to do any damage.
The adjust pin can be driven on a transient basis ±7V with
respect to the output, without any device degradation. As with
any IC regulator, exceeding the maximum input-to-output
voltage differential causes the internal transistors to break
down and none of the protection circuitry is then functional.
Figure 1. Optional Protection Diode
Ripple Rejection
In applications that require improved ripple rejection, a bypass
capacitor from the adjust pin of the FAN1582 to ground
reduces the output ripple by the ratio of VOUT/1.25V. The
impedance of the adjust pin capacitor at the ripple frequency
should be less than the value of R1 (typically in the range of
100
Ω to 120Ω) in the feedback divider network in Figure 1.
Therefore, the value of the required adjust pin capacitor is a
function of the input ripple frequency. For example, if R1 equals
100
Ω and the ripple frequency equals 120Hz, the adjust pin
capacitor should be 22µF. At 10kHz, only 0.22µF is needed.
Output Voltage
The FAN1582 regulator develops a 1.25V reference voltage
between the output pin and the adjust pin (see Figure 2).
Placing a resistor R1 between these two terminals causes a
constant current to flow through R1 and down through R2 to
set the overall output voltage. Normally, this current is the
specified minimum load current of 10mA.
The current out of the adjust pin adds to the current from R1
and is typically 50µA. Its output voltage contribution is small
and only needs consideration when a very precise output
voltage setting is required.
Figure 2. Basic Regulator Circuit
Load Regulation
The FAN1582 family provides true remote sensing, eliminat-
ing output voltage errors due to trace resistance. To utilize
remote sensing, connect the VSENSE pin directly to the
load, rather than at the VOUT pin. If the load is more than 1"
away from the FAN1582, it may be necessary to increase the
load capacitance to ensure stability.
Thermal Considerations
The FAN1582 series protect themselves under overload con-
ditions with internal power and thermal limiting circuitry.
However, for normal continuous load conditions, do not exceed
maximum junction temperature ratings. It is important to
consider all sources of thermal resistance from junction-to-
ambient. These sources include the junction-to-case resistance,
the case-to-heat sink interface resistance, and the heat sink
resistance. Thermal resistance specifications have been
developed to more accurately reflect device temperature and
ensure safe operating temperatures. The electrical character-
FAN1582
Adj
C2
22
µF
VOUT
+
C1
10
µF
+
CADJ
+
Vcntl
Vsense
Vin
Vout
R1
R2
D1
1N4002
(OPTIONAL)
VIN
VOUT
FAN1582–1.5, 2.5
Gnd
C2
22
µF
VOUT
+
C1
10
µF
+
Vcntl
Vsense
Vin
Vout
D1
1N4002
(OPTIONAL)
VIN
VCNTL
C2
22
µF
VIN
VOUT
VREF
C1
10
µF
Vcntl
+
+
Vcntl
Vsense
Vin
Adj Vout
FAN1582
R1
R2
IADJ
50
µA
VOUT = VREF (1+R2/R1) + IADJ (R2)


Codice articolo simile - FAN1582PX

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Fairchild Semiconductor
FAN1582 FAIRCHILD-FAN1582 Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
FAN1582D15X FAIRCHILD-FAN1582D15X Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
FAN1582D25X FAIRCHILD-FAN1582D25X Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
FAN1582DX FAIRCHILD-FAN1582DX Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
FAN1582M15X FAIRCHILD-FAN1582M15X Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
More results

Descrizione simile - FAN1582PX

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Fairchild Semiconductor
FAN1582_0311 FAIRCHILD-FAN1582_0311 Datasheet
78Kb / 11P
   3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
logo
Unisonic Technologies
UZ2085 UTC-UZ2085 Datasheet
286Kb / 8P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
UZ1085 UTC-UZ1085_V01 Datasheet
353Kb / 7P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
UZ1085 UTC-UZ1085_11 Datasheet
333Kb / 6P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
UZ1085 UTC-UZ1085_09 Datasheet
238Kb / 7P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
logo
E-Tech Electronics LTD
UZ1085 ETL-UZ1085 Datasheet
330Kb / 7P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
logo
Fairchild Semiconductor
FAN1587A FAIRCHILD-FAN1587A Datasheet
70Kb / 14P
   3A Adjustable/Fixed Low Dropout Linear Regulator
logo
Unisonic Technologies
UZ2085 UTC-UZ2085_12 Datasheet
290Kb / 7P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
UZ2085 UTC-UZ2085_16 Datasheet
234Kb / 8P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
UZ2085 UTC-UZ2085_V01 Datasheet
310Kb / 7P
   3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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