Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

CS5207A-1 Arkusz danych(PDF) 6 Page - ON Semiconductor

Numer części CS5207A-1
Szczegółowy opis  7.0 A LDO 3?뭁in Adjustable Linear Regulator
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5207A-1 Arkusz danych(HTML) 6 Page - ON Semiconductor

  CS5207A-1 Datasheet HTML 1Page - ON Semiconductor CS5207A-1 Datasheet HTML 2Page - ON Semiconductor CS5207A-1 Datasheet HTML 3Page - ON Semiconductor CS5207A-1 Datasheet HTML 4Page - ON Semiconductor CS5207A-1 Datasheet HTML 5Page - ON Semiconductor CS5207A-1 Datasheet HTML 6Page - ON Semiconductor CS5207A-1 Datasheet HTML 7Page - ON Semiconductor CS5207A-1 Datasheet HTML 8Page - ON Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 6 / 8 page
background image
CS5207A−1
http://onsemi.com
6
STABILITY CONSIDERATIONS
The output compensation capacitor helps determine three
main characteristics of a linear regulator: start−up delay,
load transient response, and loop stability.
The capacitor value and type is based on cost, availability,
size and temperature constraints. A tantalum or aluminum
electrolytic capacitor is best, since a film or ceramic
capacitor with almost zero ESR can cause instability. The
aluminum electrolytic capacitor is the least expensive
solution. However, when the circuit operates at low
temperatures, both the value and ESR of the capacitor will
vary considerably. The capacitor manufacturer’s data sheet
provides this information.
A 300 μF tantalum capacitor will work for most
applications, but with high current regulators such as the
CS5207A−1 the transient response and stability improve
with higher values of capacitance. The majority of
applications for this regulator involve large changes in load
current so the output capacitor must supply the
instantaneous load current. The ESR of the output capacitor
causes an immediate drop in output voltage given by:
DV + DI
ESR
For microprocessor applications it is customary to use an
output capacitor network consisting of several tantalum and
ceramic capacitors in parallel. This reduces the overall ESR
and reduces the instantaneous output voltage drop under
transient load conditions. The output capacitor network
should be as close to the load as possible for the best results.
Protection Diodes
When large external capacitors are used with a linear
regulator it is sometimes necessary to add protection diodes.
If the input voltage of the regulator gets shorted, the output
capacitor will discharge into the output of the regulator. The
discharge current depends on the value of the capacitor, the
output voltage and the rate at which VIN drops. In the
CS5207A−1 regulator, the discharge path is through a large
junction and protection diodes are not usually needed. If the
regulator is used with large values of output capacitance and
the input voltage is instantaneously shorted to ground,
damage can occur. In this case, a diode connected as shown
in Figure 13 is recommended.
A rule of thumb useful in determining if a protection diode
is required is to solve for current
I +
C
V
T
where:
I is the current flow out of the load capacitance when VIN
is shorted,
C is the value of the load capacitance,
V is the output voltage, and
T is the time duaration required for VIN to transition from
high to being shorted.
If the calculated current is greater than or equal to the
typical short circuit current value provided in the
specifications, serious thought should be given to including
a protection diode.
Figure 13.
VIN
CS5207A−1
VOUT
Adj
Current Limit
The internal current limit circuit limits the output current
under excessive load conditions and protects the regulator.
Short Circuit Protection
The device includes foldback short circuit current limit
that clamps the output current at approximately two amperes
less than its current limit value.
Thermal Shutdown
The thermal shutdown circuitry is guaranteed by design to
become activated above a die junction temperature of 150°C
and to shut down the regulator output. This circuitry
includes a thermal hysteresis circuit with 25°C of typical
hysteresis, thereby allowing the regulator to recover from a
thermal fault automatically.
Calculating Power Dissipation and Heat Sink
Requirements
High power regulators such as the CS5207A−1 usually
operate at high junction temperatures. Therefore, it is
important to calculate the power dissipation and junction
temperatures accurately to ensure that an adequate heat sink
is used. Since the package tab is connected to VOUT on the
CS5207A−1, electrical isolation may be required for some
applications. Also, as with all high power packages, thermal
compound is necessary to ensure proper heat flow. For
added safety, this high current LDO includes an internal
thermal shutdown circuit
The thermal characteristics of an IC depend on the
following four factors. Junction temperature, ambient
temperature, die power dissipation, and the thermal
resistance from the die junction to ambient air. The
maximum junction temperature can be determined by:
TJ(max) + TA(max) ) PD(max)
RQJA


Podobny numer części - CS5207A-1

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Cherry Semiconductor Co...
CS5207A-1 CHERRY-CS5207A-1 Datasheet
136Kb / 7P
   7A LDO 3-Pin Adjustable Linear Regulator
CS5207A-1GT3 CHERRY-CS5207A-1GT3 Datasheet
136Kb / 7P
   7A LDO 3-Pin Adjustable Linear Regulator
More results

Podobny opis - CS5207A-1

ProducentNumer częściArkusz danychSzczegółowy opis
logo
ON Semiconductor
CS5257A-1 ONSEMI-CS5257A-1 Datasheet
274Kb / 11P
   7.0 A LDO 5?뭁in Adjustable Linear Regulator
September, 2006 ??Rev. 10
CS5210-1 ONSEMI-CS5210-1 Datasheet
220Kb / 8P
   10 A LDO 3?뭁in Adjustable Linear Regulator
July, 2006 ??Rev. 7
CS5208-1 ONSEMI-CS5208-1 Datasheet
221Kb / 8P
   8.0 A LDO 3?뭁in Adjustable Linear Regulator
September, 2006 ??Rev. 6
CS5253-1 ONSEMI-CS5253-1 Datasheet
268Kb / 10P
   3.0 A LDO 5?뭁in Adjustable Linear Regulator
September, 2006??Rev. 11
CS52510-1 ONSEMI-CS52510-1 Datasheet
262Kb / 10P
   10 A LDO 5?뭁in Adjustable Linear Regulator
September, 2006 ??Rev. 6
CS5258-1 ONSEMI-CS5258-1 Datasheet
255Kb / 10P
   8.0 A LDO 5?뭁in Adjustable Linear Regulator
September, 2006 ??Rev. 6
CS5207-1 ONSEMI-CS5207-1 Datasheet
203Kb / 7P
   7.0 A Adjustable Linear Regulator
September, 2006 ??Rev. 6
logo
Cherry Semiconductor Co...
CS5208-1 CHERRY-CS5208-1 Datasheet
136Kb / 7P
   8A LDO 3-Pin Adjustable Linear Regulator
CS5210-1 CHERRY-CS5210-1 Datasheet
142Kb / 8P
   10A LDO 3-Pin Adjustable Linear Regulator
CS5207A-1 CHERRY-CS5207A-1 Datasheet
136Kb / 7P
   7A LDO 3-Pin Adjustable Linear Regulator
More results


Html Pages

1 2 3 4 5 6 7 8


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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