SC4624A Datasheet, PDF (10/19 Pages) Semtech Corporation – Low Input Voltage, High Efficiency, 4A Integrated FET Synchronous Step down DC/DC Regulator

POWER MANAGEMENT
Block Diagram
VCC
BANDGAP
BANDGAP
THERMAL
SHUTDOWN
UVLO
AGND
VREF
SS
FB
COMP
SYNC/EN
FFSB
SOFT
START
SD
OSC
CLOCK
ERROR
OPAMP
PWM
BLOCK
PWM
LOGIC
1.1VREF
0.9VREF
SC4624A
ASYNCHRONOUS
START UP
0.5V ₊
-
SHOOT-
THRU
PROTECTION
TOP GATE
PVIN1
PVIN2
HIGH SIDE DRIVER
AND LOGIC
ISET
I = F(R_ISET)
OVER
CURRENT
PROTECT
BOTTOM
GATE
LOW SIDE DRIVER
AND LOGIC
PH1
PH2
PH3
PGND1
PGND2
PGOOD
 2008 Semtech Corp.
10
www.semtech.com