SC4808C 데이터 시트보기 (PDF) - Semtech Corporation
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SC4808C Datasheet PDF : 24 Pages
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SC4808C
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
VCC
-0.5 to18
V
ICC
20
mA
-0.5 to 7
V
FB to GND
VFB
-0.5 to (VREF+ 0.5)
V
REF Current
IREF
10
mA
OUTA/OUTB to GND
VOUTA/B
-0.5 to 18
V
OUTA/OUTB Source Current (peak)
Isource
-250
mA
OUTA/OUTB Sink Current (peak)
Isink
250
mA
Thermal Resistance
θJA
136*
°C/W
Junction Temperature
TJ
-40 to 150
°C
Storage Temperature Range
TSTG
-65 to 150
°C
Lead Temperature (Soldering) 10 Sec.
TLEAD
+300
°C
ESD Rating (Human Body Model)
VESD
2
kV
*Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad as per JESD51 standards.
Electrical Characteristics
Unless specified: VCC = 12V; CL = 100pF; TA = -40°C to 105°C
Parameter
Test Conditions
PWM
Maximum Duty Cycle
Minimum Duty Cycle
Fosc = 50kHz, FB = 3.5V,
Measured at OUTA or OUTB
Fosc = 50kHz, FB = 1.5V,
Measured at OUTA or OUTB
Current Sense
Gain
Maximum Input Signal
CS to Output Delay
Over Current Threshold
Internal Slope Compensation Resistor
FB to CS Offset
Output
OUT Low Level
OUT High Level
Rise Time
Fall Time
2006 Semtech Corp.
2
Min
Typ
Max Unit
48
49
50
%
0
%
3
475
525
575
mV
100
ns
600
700
800
mV
25
kΩ
1.30
1.50
1.70
V
0
.50
.70
V
11.0
11.25 12.00
V
25
ns
25
ns
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