SC2620
POWER MANAGEMENT
Typical Characteristics
Feedback Voltage vs Temperature
1.02
V
IN
= 5V
1.01
1.00
0.99
0.98
0.97
-50
-25
0
25
50
75
100 125
Temperature (°C)
Frequency Setting Resistor
vs Channel Frequency
1000
V
IN
= 5V
Normalized Frequency
1.05
1.10
Normalized Channel
Frequency vs Temperature
600kHz
R
OSC
(k
Ω
)
V
FB
(V)
100
1.00
1.4MHz
0.95
10
0.0
0.5
1.0
1.5
0.90
-50
-25
0
25
50
75
100 125
Frequency (M Hz)
Temperature (°C)
400
Switch Saturation Voltage
vs Switch Current
125°C
Switch Current Limit
vs Temperature
3.6
3.4
Current Limit (A)
3.2
3.0
2.8
Boost Pin Current
vs Switch Current
80
V
IN
= 5V
Boost Pin Current (mA)
V
BST
= 8V
V
CESAT
(mV)
300
-40°C
60
-40°C
40
125°C
200
20
25°C
100
0.0
0.5
1.0
1.5
2.0
2.5
Switch Current (A)
2.6
-50
-25
0
25
50
75
100 125
Temperature (°C)
0
0.0
0.5
1.0
1.5
2.0
2.5
Switch Current (A)
SS Shutdown Threshold
vs Temperature
0.40
V
SS1
= V
SS2
V
IN
Shutdown Current vs V
IN
200
T
A
= 25°C
V
IN
Current ( A)
V
IN
Current (mA)
4
V
IN
Quiescent Current vs V
IN
SS Threshold (V)
0.35
150
3
0.30
100
2
0.25
50
V
SS1
= V
SS2
= 0
1
T
A
= 25°C
0
0
5
10
15
V
IN
(V)
20
25
30
0.20
-50 -25
0
25
50
75 100 125
Tempe rature (°C)
0
0
5
10
15
V
IN
(V)
20
25
30
2006 Semtech Corp.
6
www.semtech.com
SEMTECH [ SEMTECH CORPORATION ]
