SC411 Semtech Corporation, SC411 Datasheet - Page 3

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

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© 2007 Semtech Corp.
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Parameter
Input Supplies (Cont.)
TON Operating Current
Shutdown Current
Controller
Error Comparator Threshold
(FB Turn-on Threshold)
Output Voltage Range
On-Time, V
Minimum Off-Time
VOUT Input Resistance
VOUT Shutdown
Discharge Resistance
FB Input Bias Current
Over-Current Sensing
ILIM Source Current
Current Comparator Offset
PSAVE
Zero-Crossing Threshold
Fault Protection
BAT
= 2.5V
(1)
internal x3 gain stage, com-
parator, and 1.5V REF
VCCA = 4.5V to 5.5V
Includes variations of
EN/PSV = GND
EN/PSV = 0V
R
EN/PSV = 5V
(PGND - LX),
PGND - ILIM
Conditions
VDDP, TON
R
TON
R
TON
DL high
TON
VCCA
= 500kΩ
= 1MΩ
= 1M
3
Min
0.500
25°C
1761
Typ
936
400
500
15
22
10
-5
5
0
5
Max
-1.2%
1409
-40°C to 125°C
Min
-1.0
749
0.5
-10
9
+1.2%
VCCA
2113
1123
Max
+1.0
550
-10
10
10
11
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1
SC411
Units
mV
mV
kΩ
μA
μA
μA
μA
μA
μA
ns
ns
Ω
V
V