Datasheet

FB
PGOOD
V
IN
LM21212-1
V
OUT
AGND
COMP
PVIN
SYNC
SW
EN
L
O
R
C1
C
C1
C
C2
C
C3
R
FB1
R
FB2
R
C2
PGND
AVIN
C
F
1
11-16
3
4
17
19
18
20
8,9,10
5,6,7
R
F
SS/
TRK
C
SS
2
HTSSOP-20
C
IN1
V
IN
R
PGOOD
C
O1
C
O2
R
EN1
R
EN2
OPEN
LM21212-1
www.ti.com SNVS671E –FEBRUARY 2011–REVISED MARCH 2013
Figure 41. Typical Application Schematic 2
Table 2. Bill of Materials (V
IN
= 4.0 - 5.5V, V
OUT
= 0.9V, I
OUT
= 8A, f
SW
= 1MHz)
ID DESCRIPTION VENDOR PART NUMBER QUANTITY
C
F
CAP, CERM, 1uF, 10V, +/-10%, MuRata GRM188R71A105KA61D 1
X7R, 0603
C
IN1
, C
O1
, C
O2
CAP, CERM, 100uF, 6.3V, +/-20%, MuRata GRM31CR60J107ME39L 3
X5R, 1206
C
C1
CAP, CERM, 1800pF, 50V, +/-5%, MuRata GRM1885C1H182JA01D 1
C0G/NP0, 0603
C
C2
CAP, CERM, 68pF, 50V, +/-5%, TDK C1608C0G1H680J 1
C0G/NP0, 0603
C
C3
CAP, CERM, 470pF, 50V, +/-5%, TDK C1608C0G1H471J 1
C0G/NP0, 0603
C
SS
CAP, CERM, 0.033uF, 16V, +/-10%, MuRata GRM188R71C333KA01D 1
X7R, 0603
L
O
Inductor, Shielded Drum Core, Wurth Elektronik 744314024 1
Superflux, 240nH, 20A, 0.001 ohm, eiSos
SMD
R
F
RES, 1.0 ohm, 5%, 0.1W, 0603 Vishay-Dale CRCW06031R00JNEA 1
R
C1
RES, 4.87k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW06034K87FKEA 1
R
C2
RES, 210 ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW0603210RFKEA 1
R
EN1
, R
FB1
, R
PGOOD
RES, 10k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060310K0FKEA 3
R
EN2
RES, 19.6k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060319K6FKEA 1
R
FB2
RES, 20.0k ohm, 1%, 0.1W, 0603 Vishay-Dale CRCW060320K0FKEA 1
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