Texas Instruments SIMPLE SWITCHER® 42V, 0.5A Step-Down Switching Regulator LM25575BLDT/NOPB LM25575BLDT/NOPB 데이터 시트
제품 코드
LM25575BLDT/NOPB
Ccomp =
8 x 10
3
x Rcomp[14]
1
Quick Guide Design Worksheet
Calculate the value of Ccomp
(10)
Selected value of Ccomp:
Farads [15]
Step 12. Shown in
is the Bill of Materials for your design. Transcribe each value [#] from the
worksheet above into the following table. Congratulations, you’re done.
2.1
Bill of Materials
Table 1. Bill of Materials
SCH REF
PART NUMBER
DESCRIPTION
VALUE
WORK SHEET REF
C1 (Cin)
INPUT CAPACITOR
[12]
C2 (Cin)
OPTIONAL INPUT CAPACITOR
[12]
C3 (C
RAMP
)
RAMP CAPACITOR
[8]
C4 (Css)
C2012X7R2A103K
CAPACITOR, TDK
0.01µ
--
C5 (Ccomp)
COMPENSATION CAP
[15]
C6 (Cboot)
C2012X7R2A223K
CAPACITOR, TDK
0.022µ, 100V
--
C7 (Cbyp)
C2012X7R1C474M
CAPACITOR, TDK
0.47µ, 16V
--
C8 (Cout)
OUTPUT CAPACITOR
[13]
C9 (Cout)
OPTIONAL OUTPUT CAPACITOR
[13]
D1
SCHOTTKY DIODE
[11]
L1
INDUCTOR
[7]
R1 (Rfb1)
Feedback RESISTOR
[10]
R2 (Rfb2)
Feedback RESISTOR
[9]
R3 (Rt)
TIMING RESISTOR
[6]
R4 (Rcomp)
COMPENSATION RESISTOR
[14]
U1
REGULATOR, Texas Instruments
[4]
5
SNVA211B – January 2007 – Revised April 2013
AN-1571 Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575
and LM25575
Copyright © 2007–2013, Texas Instruments Incorporated