SC411 Semtech Corporation, SC411 Datasheet - Page 6

• Manufacturer Part Number: SC411
• Description: Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
• Manufacturer: Semtech Corporation

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© 2007 Semtech Corp.
Block Diagram
POWER MANAGEMENT
EN/PSV (15)
VOUT (1)
VCCA (2)
TON (16)
VSSA (6)
PGD (4)
FB (3)
Note: the Error Comparator tolerances are approximately
DSCHG
DSCHG
x3 gain stage = +/- 0.1% gain error
comparator = +/- 3mV offset error
1.5V REF = +/- 1.0%
POR / SS
1.5V REF
X3
TON
TOFF
Error Comparator
+
-
FAULT
MONITOR
OT
6
ON
OFF
PWM
REF + 16%
REF - 10%
REF - 30%
OV
UV
ZERO
OC
LOGIC
CONTROL
ISENSE
HI
LO
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SC411
BST (13)
DH (12)
LX (11)
NC (14)
ILIM (10)
VDDP (9)
PGND (7)
NC (5)
DL (8)