8 2006 Semtech Corp. www.semtech.com
SC4808B-1
POWER MANAGEMENT
100
105
110
115
120
125
130
135
140
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
LUVLO Hysteresis (mV)
LUVLO (Hysteresis)
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
SC4808B-1 Typical Characteristics (Cont.)
49.4
49.4
49.4
49.4
49.4
49.5
49.5
49.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Maximum Duty Cycle (%)
Maximum Duty Cycle
650
652
654
656
658
660
662
664
-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
3.120
3.125
3.130
3.135
3.140
3.145
3.150
3.155
3.160
3.165
3.170
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
LUVLO (V)
LUVLO (Rising)
84
86
88
90
92
94
96
98
100
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Vcc UVLO Hysteresis (mV)
Vcc UVLO (Hysteresis)
