MIC24053 Datasheet, PDF (2/32 Pages) Micrel Semiconductor – 12V, 9A High-Efficiency Buck Regulator

MIC24053
Package Type
MIC24053
5x6 QFN
Top View
PVDD 1
PGND 2
NC 3
28 27 26 25
PGND
SW ⁴
PGND 5
PGND 6
SW
PGND 7
PGND 8
24 23
22 CS
21 PGND
20 BST
19 PVIN
18 PVIN
PVIN ^{17 PVIN}
16 PVIN
15 PVIN
9 10 11 12
13 14
Functional Block Diagram
2.2μF
VDD
PVDD
VIN
MIC24053
LDO
VDD
FIXED T_ON
ESTIMATE
MODIFIED
UVLO
T_OFF
10k
EN
CONTROL
LOGIC
TIMER
SOFT-START
HSD
CL AND ZC
DETECTION
THERMAL
SHUTDOWN
SOFT
START
PVDD
VDD
10k
PG
INTERNAL
RIPPLE
INJECTION
COMP
LSD
COMPENSATION
gm EA
8%
92%
VREF
0.8V
VIN
PVIN
BST
SW
CS
VIN
4.5V to 19V
4.7μF
x2
0.1μF
C_BST
2.2μH
0.1μF
19.6k
R1
2.49k
4.7nF
SGND
VOUT
1.8V/9A
100μFx2
PGND
FB
R2
2.00k
DS20005668A-page 2
 2015 Microchip Technology Inc.