8 2005 Semtech Corp. www.semtech.com
SC4808A/B
POWER MANAGEMENT
SC4808A Typical Characteristics (Cont.)
Vcc UVLO Hysteresis vs. Temperature
Line UVLO vs. Temperature
Line UVLO Hysteresis vs. Temperature
Oscillator Frequency vs. Temperature
Synchronization Frequency vs. Temperature
Maximum Duty Cycle vs. Temperature
49.0
49.0
49.1
49.1
49.2
49.2
49.3
49.3
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Maximum Duty Cycle (%)
Maximum Duty Cycle
400
500
600
700
800
900
1000
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Synchronization Frequency (kHz)
Sync. Frequency @ Fosc = 500kHz
200
400
600
800
1000
1200
1400
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Oscillator Frequency (kHz)
Oscillator Frequency 1MHz
Oscillator Frequency 500kHz
4.985
4.990
4.995
5.000
5.005
5.010
5.015
5.020
5.025
5.030
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
LUVLO (V)
LUVLO (Rising)
290
295
300
305
310
315
320
325
330
335
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
LUVLO Hysteresis (mV)
LUVLO (Hysteresis)
3.00
3.20
3.40
3.60
3.80
4.00
4.20
4.40
4.60
4.80
5.00
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Vcc UVLO Hysteresis (V)
Vcc UVLO
(Hysteresis)
