Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

SP7652ER Datasheet(PDF) 8 Page - Sipex Corporation

Part # SP7652ER
Description  Wide Input Voltage Range 6A, 600kHz, Buck Regulator
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP7652ER Datasheet(HTML) 8 Page - Sipex Corporation

Back Button SP7652ER Datasheet HTML 4Page - Sipex Corporation SP7652ER Datasheet HTML 5Page - Sipex Corporation SP7652ER Datasheet HTML 6Page - Sipex Corporation SP7652ER Datasheet HTML 7Page - Sipex Corporation SP7652ER Datasheet HTML 8Page - Sipex Corporation SP7652ER Datasheet HTML 9Page - Sipex Corporation SP7652ER Datasheet HTML 10Page - Sipex Corporation SP7652ER Datasheet HTML 11Page - Sipex Corporation SP7652ER Datasheet HTML 12Page - Sipex Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 16 page
background image
8
Rev F: /0/06
SP7652 Wide Input Voltage Range 6A, 600kHz, Buck Regulator
© Copyright 2006 Sipex Corporation
Output Capacitor Selection
The required ESR (Equivalent Series Re-
sistance) and capacitance drive the selec-
tion of the type and quantity of the output
capacitors. The ESR must be small enough
that both the resistive voltage deviation due
to a step change in the load current and
the output ripple voltage do not exceed
the tolerance limits expected on the output
voltage. During an output load transient,
the output capacitor must supply all the ad-
ditional current demanded by the load until
the SP7652 adjusts the inductor current to
the new value.
In order to maintain VOut, the capacitance
must be large enough so that the output
voltage is held up while the inductor current
ramps up or down to the value correspond-
ing to the new load current. Additionally, the
ESR in the output capacitor causes a step
in the output voltage equal to the current.
Because of the fast transient response and
inherent 100% to 0% duty cycle capability
provided by the SP7652 when exposed to
output load transient, the output capacitor
is typically chosen for ESR, not for capaci-
tance value.
The ESR of the output capacitor, combined
with the inductor ripple current, is typically
the main contributor to output voltage ripple.
The maximum allowable ESR required to
maintain a specified output voltage ripple
can be calculated by:
RESR ≤ ∆VOUT
IPK-PK
where:
∆Vout = Peak-to-Peak Output Voltage
Ripple
Ipk-pk = Peak-to-Peak Inductor Ripple Cur-
rent
The total output ripple is a combination of
the ESR and the output capacitance value
and can be calculated as follows:
APPLICATIONS INFORMATION
Icin(RmS)= iOut(max) √D(1-D)
Pcin=i2cin(RmS) RESR(cin)
∆VOut =
(IPP(1–D)
)2+(IppRESR)2
COutFS
FS = Switching Frequency
D = Duty Cycle
COut = Output Capacitance Value
Input Capacitor Selection
The input capacitor should be selected for
ripplecurrentrating,capacitanceandvoltage
rating. The input capacitor must meet the
ripple current requirement imposed by the
switching current. In continuous conduction
mode, the source current of the high-side
MOSFET is approximately a square wave
of duty cycle VOut/Vin. Most of this current
is supplied by the input bypass capacitors.
The RMS value of input capacitor current is
determined at the maximum output current
and under the assumption that the peak
to peak inductor ripple current is low; it is
given by:
The worse case occurs when the duty cycle
D is 50% and gives an RMS current value
equal to IOut/2.
Select input capacitors with adequate ripple
current rating to ensure reliable operation.
The power dissipated in the input capaci-
tor is:
This can become a significant part of power
losses in a converter and hurt the overall
energy transfer efficiency. The input volt-
age ripple primarily depends on the input
capacitor ESR and capacitance. Ignoring
the inductor ripple current, the input voltage
ripple can be determined by:


Similar Part No. - SP7652ER

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP7652ER-L/TR SIPEX-SP7652ER-L/TR Datasheet
133Kb / 13P
   Wide Input Voltage Range 6A, 600kHz, Buck Regulator
SP7652ER/TR SIPEX-SP7652ER/TR Datasheet
133Kb / 13P
   Wide Input Voltage Range 6A, 600kHz, Buck Regulator
More results

Similar Description - SP7652ER

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP7663 SIPEX-SP7663_07 Datasheet
1Mb / 19P
   Wide Input Voltage Range 6A, 600kHz, Buck Regulator
SP7652 SIPEX-SP7652 Datasheet
133Kb / 13P
   Wide Input Voltage Range 6A, 600kHz, Buck Regulator
SP7661 SIPEX-SP7661_07 Datasheet
1Mb / 20P
   Wide Input Voltage Range 3A, 600kHz, Buck Regulator
SP7661 SIPEX-SP7661 Datasheet
1,004Kb / 20P
   Wide Input Voltage Range 3A, 600kHz, Buck Regulator
SP7653 SIPEX-SP7653 Datasheet
207Kb / 12P
   Wide Input Voltage Range, 1.3MHz,Buck Regulator
SP7653 SIPEX-SP7653_06 Datasheet
795Kb / 15P
   Wide Input Voltage Range, 1.3MHz, Buck Regulator
logo
International Rectifier
IR3822AMPBF IRF-IR3822AMPBF Datasheet
40Kb / 1P
   HIGHLY INTEGRATED 6A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
IR3863MPBF IRF-IR3863MPBF Datasheet
1Mb / 21P
   6A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
IR3822AMPBF IRF-IR3822AMPBF_08 Datasheet
495Kb / 21P
   HIGHLY INTEGRATED 6A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
IR3863M IRF-IR3863M_15 Datasheet
1Mb / 21P
   6A HIGHLY INTEGRATED WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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