SC4905A_06 Datasheet, PDF (14/24 Pages) Semtech Corporation – High Performance Voltage Mode PWM Controller

SC4905A/B
POWER MANAGEMENT
SC4905A Typical Characteristics
(SC4808A)
78
Start up Iq, Vdd = 3V
76
74
72
70
68
66
64
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Iq (start up) vs. Temperature
198
197
Current limit rising
196
195
194
193
192
191
190
-40
-25 -10 5
20 35 50 65 80 95
Ta (°C)
Current Limit vs. Temperature
110 125
3.200
3.100
Idd Active, Vdd = 4V
3.000
2.900
2.800
2.700
2.600
-40 -25 -10 5
20 35 50 65 80 95 110 125
Ta (°C)
Idd (operating) vs. Temperature
65
Current limit Input current
60
55
50
45
40
35
-40 -25 -10 5 20 35 50 65 80 95 110 125
Ta (°C)
Current Limit bias current vs. Temperature
4.025
4.020
Reference, Iref = 0mA, Vdd = 5V
Reference, Iref = 5mA, Vdd = 5V
4.015
4.010
4.005
4.000
3.995
-40 -25 -10 5
20 35 50 65 80 95 110 125
Ta (°C)
Reference vs. Temperature
4.55
4.50
Vdd UVLO (Rising)
Vdd UVLO (Falling)
4.45
4.40
4.35
4.30
4.25
4.20
4.15
-40
-25 -10 5
20 35 50 65 80
Ta (°C)
Vdd UVLO vs. Temperature
95 110 125
 2006 Semtech Corp.
14
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