XR76115 Datasheet, PDF (14/16 Pages) Exar Corporation – 15A Synchronous Step Down COT Regulator

XR76115
Applications Circuit
MMSZ4687=4.3V --> DCM/CCM
MMSZ4681=2.4V --> Forced CCM
D1 ^MMSZXXXX _{R3 10k,}
PVIN
CBST
1uF
EN/MODE
PWRGD
1
SW RLIM 2.5k 2
3
RON 6k
4
CSS 47nF
5
6
7
VCC
R4 10k
8
FB
9
NC
ILIM
EN
TON
SS
PGOOD
FB
AGND
NC
AGND PAD
XR76115
CIN 0.1uF
CVCC 4.7uF
PVIN
VCC
PVIN
12VIN
22uF 22uF
PVIN ²⁸
PVIN ²⁷
PVIN ²⁶
25
SW
PGND ²⁴
23
PGND
PGND ²²
PGND ²¹
PGND ²⁰
19
PGND
PGND PAD
Csnb 3.3nF
L1 IHLP-5050FD
0.56uH @ 37A, 1.2mOhm
600kHz 1.2V 15A
Rsnb
1 Ohm
CFF
1nF
680uF 47uF 47uF 47uF
RFF
10 Ohm
R1
2k,1%
FB
R2
2k,1%
Figure 29: XR76115 Application circuit schematic
© 2015 Exar Corporation
14/16
www.exar.com
Rev. 1B