SC4808B-2MSTRT 데이터 시트보기 (PDF) - Semtech Corporation
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SC4808B-2MSTRT Datasheet PDF : 28 Pages
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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
VCC
-0.5 to18
V
ICC
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 = 25°C
A
Thermal Resistance
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
ESD Rating (Human Body Model)
Electrical Characteristics
V
FB
IREF
VOUTA/B
Isource
Isink
P
D
θJA
TJ
TSTG
TLEAD
VESD
Unless specified: VCC = 12V; CL = 100pF; TA = -40°C to 105°C
Parameter
Test Conditions
-0.5 to (V + 0.5)
REF
10
-0.5 to 18
-250
250
1.105
113.1
-40 to 150
-65 to 150
+300
2
Min
Typ
V
mA
V
mA
mA
W
°C/W
°C
°C
°C
kV
Max Unit
PWM
Maximum Duty Cycle
Minimum Duty Cycle
Fosc = 50kHz, FB = 5V,
Measured at OUTA or OUTB
Fosc = 50kHz, FB = 1.5V,
Measured at OUTA or OUTB
48
49
50
%
0
%
Current Sense
Gain
3
Maximum Input Signal
475
525
575 mV
CS to Output Delay
100
ns
Over Current Threshold
Internal Slope Compensation Resistor
.850
.950
1
V
25
kΩ
FB to CS Offset
Output
1.30
1.50 1.70
V
OUT Low Level
0
.50
.70
V
OUT High Level
11.0
11.25 12.00
V
Rise Time
25
ns
Fall Time
© 2009 Semtech Corp.
25
ns
2
www.semtech.com
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