SC4808B-2 Datasheet, PDF (2/28 Pages) Semtech Corporation – High Performance Dual Ended PWM Controller

SC4808B-2
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in
the Electrical Characteristics section is not implied.
Parameter
Symbol
Maximum
Units
Supply Voltage
Supply Current
SYNC, RC,CS, LUVLO, REF to GND
V_CC
-0.5 to18
V
I_CC
20
mA
-0.5 to 7
V
FB to GND
REF Current
OUTA/OUTB to GND
OUTA/OUTB Source Current (peak)
OUTA/OUTB Sink Current (peak)
Power Dissipation at T_A = 25°C
Thermal Resistance
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
ESD Rating (Human Body Model)
V_FB
I_REF
V_OUTA/B
I_source
I_sink
P_D
θ_JA
T_J
T_STG
T_LEAD
V_ESD
-0.5 to (V_REF+ 0.5)
10
-0.5 to 18
-250
250
1.105
113.1
-40 to 150
-65 to 150
+300
2
V
mA
V
mA
mA
W
°C/W
°C
°C
°C
kV
Electrical Characteristics
Unless specified: VCC = 12V; CL = 100pF; T_A = -40°C to 105°C
Parameter
Test Conditions
Min
Typ
Max Unit
PWM
Maximum Duty Cycle
Minimum Duty Cycle
Current Sense
Gain
Maximum Input Signal
CS to Output Delay
Over Current Threshold
Internal Slope Compensation Resistor
Fosc = 50kHz, FB = 5V,
Measured at OUTA or OUTB
Fosc = 50kHz, FB = 1.5V,
Measured at OUTA or OUTB
48
49
50
%
0
%
3
475
525
575
mV
100
ns
.850
.950
1
V
25
kΩ
FB to CS Offset
Output
1.30
1.50
1.70
V
OUT Low Level
OUT High Level
Rise Time
Fall Time
0
.50
.70
V
11.0
11.25 12.00
V
25
ns
25
ns
 2006 Semtech Corp.
2
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