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| SC1104 Datasheet, PDF (2/7 Pages) Semtech Corporation – Simple, Synchronous Voltage Mode PWM Controller | |||
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SC1104A/B
POWER MANAGEMENT
Absolute Maximum Ratings
PRELIMINARY
Parameter
Symbol
Maximum
Units
VCC to GND
BST to PHASE
15
V
15
V
PHASE to GND
-1 to 15
V
DH to PHASE
15
V
DL to GND
15
V
COMP/SS to GND
7
V
SENSE to GND
7
V
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
θJC
θJA
TA
TSTG
TLead
40
160
-40 to +85
-65 to +150
300
°C/W
°C/W
°C
°C
°C
Electrical Characteristics
Unless specified: A: VCC = 12 ± 0.6V, VBST = 23 ± 1V, VOUT = 3.3V, TA = 25oC. B: VCC = 5 ± 0.25V, VBST = 12 ± 0.6V, VOUT = 2.0V, TA = 25oC
Parameter
Symbol
Conditions
Min
Typ
Max Units
Power Supply
Supply Voltage
Supply Current
Error Amplifier
VCC
FSW = 300kHz (nom.), (SC1104A)
4.2
VCC
FSW = 600kHz (nom.), (SC1104B)
4.2
12.6
V
7
ICC
VCOMP ⤠0.4V
11
14
mA
E/A Transconductance
gm
Input Bias Current
IFB
Output Sink Current
ISIK
Source Current
ISC
Oscillator
VSENSE ⥠1.1V; VCOMP = 1.5V
VSENSE ⥠0.9V; VCOMP = 1.5V
10
mS
1
3
µA
0.7
mA
1.1
Switching Frequency
Ramp Peak Voltage
FOSC
VP-K
VCC = 12V ± 0.6V
VCC = 5V ± 0.25V
4.75V ⤠VCC ⤠12.6V
270
300
330
kHz
540
600
660
2.0
V
© 2001 Semtech Corp.
2
www.semtech.com
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