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LM27402 Datasheet(PDF) 23 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM27402
Description  High Performance Synchronous Buck Controller with DCR Current Sensing
PDF  32 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM27402 Datasheet(HTML) 23 Page - National Semiconductor (TI)

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EXAMPLE CIRCUIT 1
30092676
FIGURE 20. 5V - 12V V
IN to 1.5V VOUT, 20A IOUT, fsw = 300 kHz
Bill of Materials
Designator
Type
Parameters
Part Number
Qty
Manufacturer
U1
Synchronous Buck
Controller
LM27402
1
National
Semiconductor
C
BOOT
Capacitor
0.22 µF, Ceramic, X7R,
25V, 10%
GRM188R71E224KA88D
1
Murata
C
C1
Capacitor
3900 pF, Ceramic, X7R,
50V, 10%
GRM188R71H392KA01D
1
Murata
C
C2
Capacitor
150 pF, Ceramic, C0G,
50V, 5%
GRM1885C1H151JA01D
1
Murata
C
C3
Capacitor
820 pF, Ceramic, C0G,
50V, 5%
GRM1885C1H821JA01D
1
Murata
C
VDD
Capacitor
1 µF, Ceramic, X5R,
25V, 10%
GRM188R61E105KA12D
1
Murata
C
F
Capacitor
1 µF, Ceramic, X5R,
25V, 10%
GRM188R61E105KA12D
1
Murata
C
IN
Capacitor
22 µF, Ceramic, X5R,
25V, 10%
GRM32ER61E226KE15L
5
Murata
C
OUT
Capacitor
100 µF, Ceramic, X5R,
6.3V, 20%
C1210C107M9PACTU
4
Kemet
C
S
Capacitor
0.22 µF, Ceramic, X7R,
25V, 10%
GRM188R71E224KA88D
1
Murata
C
SS
Capacitor
47000 pF, Ceramic,
X7R, 16V, 10%
GRM188R71C473KA01D
1
Murata
C
SBY
Capacitor
100 pF, Ceramic, C0G,
50V, 5%
GRM1885C1H101JA01D
1
Murata
D
BOOT
Diode
Schottky Diode,
Average I = 100 mA,
Max Surge I = 750 mA
CMOSH-3
1
Central Semi
D
SW
Diode
Schottky Diode,
Average I = 3A, Max
Surge I = 80A
CMSH3-40M
1
Central Semi
L
OUT
Inductor
.68 µH, 2.34 m
Ω
IHLP5050CEERR68M06
1
Vishay
23
www.national.com



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