Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

Preview PDF HTML

SP6650 Scheda tecnica(PDF) 13 Page - Sipex Corporation

Il numero della parte SP6650
Spiegazioni elettronici  High Efficiency 600mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery
PDF  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP6650 Scheda tecnica(HTML) 13 Page - Sipex Corporation

Back Button SP6650 Datasheet HTML 9Page - Sipex Corporation SP6650 Datasheet HTML 10Page - Sipex Corporation SP6650 Datasheet HTML 11Page - Sipex Corporation SP6650 Datasheet HTML 12Page - Sipex Corporation SP6650 Datasheet HTML 13Page - Sipex Corporation SP6650 Datasheet HTML 14Page - Sipex Corporation SP6650 Datasheet HTML 15Page - Sipex Corporation SP6650 Datasheet HTML 16Page - Sipex Corporation SP6650 Datasheet HTML 17Page - Sipex Corporation  
Zoom Inzoom in Zoom Outzoom out
 13 / 17 page
background image
13
Date: 5/25/04
SP6650 High Efficiency 600mA Synchronous Buck Regulator
© Copyright 2004 Sipex Corporation
The additional Rf/Cf network used in Figure 16
generates an artificial ramp from the LX pin
voltage and superimposes it to the feedback pin.
As a result, the internal loop comparator doesn’t
have to rely on output ripple to run PFM. Now
low ESR output capacitors, such as ceramic
capacitors, can be used, and the output ripple can
be reduced by two to three times. For the best
result, size the Cf and Rf values so the network
would introduce 10 to 30mV ripples to the FB
RB
100k
SP6650
U1
10
9
8
7
6
1
2
3
4
5
L1 22µH
COUT
47µF
R2
160k
R3
100k
Cf
33nF
PVIN
VIN
BLON
ILIM
SHDN
LX
PGND
GND
VOUT
FB
®
®
Rf
4.99k
3.3V/600mA
Vin 2.7-6.5 VDC
CVIN
1.0µF
RVIN
10.0
CIN
47µF
ADDITIONAL APPLICATION CIRCUITS
Figure 16. Additional Application Circuit with Low Output Ripple
pin. Oversized ripple would compromise the
load regulation and also cause oscillation during
load transient. Load transient response and out-
put ripples from Figure 16 circuit are shown in
Figure 17 and Figure 18, respectively. The added
ripple voltage can be calculated from
∆V =
KON
RfCf
Figure 17. VOUT transient response from 50mA to
500mA load step. CH1- VOUT, CH4 - ILOAD
Figure 18. Output ripple CH1-output ripple. VIN = 5,
VOUT = 3.3V, ILOAD = 600mA



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


Scheda tecnica Scarica

Go To PDF Page


Link URL



Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   Collegamento alla scheda tecnica    |   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