XR76121ELMTR-F Datasheet, PDF (15/19 Pages) Exar Corporation – PowerBlox 20A Synchronous Step-Down COT Regulators

Applications Information
XR76121
REN2 3.83k REN1 10k VIN
VIN = 12V
CSS
47nF
CBST 0.1µF
2 x 0.1µF
4 x 22µF/25V/X6T/1206
FB
VCC
RON 6.19k
SW ^{RLIM 1.82k}
VCC RPGOOD 10k
1 _FB
2 _FCCM
3 _AGND
4 _AGND
5 _TON
6 _ILIM
7 _PGOOD
XR76121
VOUT
RSENS1
VCC
4.02k
L1, IHLP-5050FD-01
800kHz, 1.8V, 0-20A
SW
0.4µH at 44A, 0.9m Ohm _VOUT
12 SW
4 x 0.1µF 5 x 100µF/6.3V/X6T/1206
CFF
470pF
RFF
0.4k
FB
R1
4.02k
VIN
RSENS2
2k
CIN
CVCC
R2
2k
0.1µF
4.7µF
Figure 27. Application Circuit Schematic
REV1A
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