sp6641b Exar Corporation, sp6641b Datasheet - Page 4

• Manufacturer Part Number: sp6641b
• Description: Sp6641b -500ma Alkaline Dc/dc Boost Regulator
• Manufacturer: Exar Corporation

PERFORMANCE CHARACTERISTICS
Refer to the circuit in Figure 1, T
Figure 3. SP6641AEK - 3.3 Efficiency vs Load Current
Figure 5. SP6641AEK - 3.3 Line/Load Rejection vs Load
Current
Figure 7. SP6641AEK-5.0 Efficiency Vs Load Current
Rev. 5/26/05, *Patent Pending
100
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
100
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
0.1
0.1
0
V
V
V
IN
IN
IN
= 3.0V
= 2.6V
= 2.0V
50
1.0
1.0
100
Iload (mA)
Iload (mA)
V
V
IN
IN
10.0
Iload (mA)
= 1.3V
= 1.0V
10.0
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
AMB
V
V
V
IN
IN
IN
150
= 3.0V
= 2.6V
= 2.0V
= +25°C
100.0
100.0
200
Vi=4.2V
Vi=3.6V
Vi=3.3V
Vi=2.0V
Vi=1.3V
V
V
IN
IN
= 1.3V
= 1.0V
1000.0
1000.0
250
4
Figure 8. SP6641BEK-5.0 Efficiency Vs Load Current
Figure 4. SP6641BEK - 3.3 Efficiency vs Load Current
Figure 6. SP6641BEK - 3.3 Line/Load Rejection vs Load
Current
100
100
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
0.1
0.1
0
V
V
V
IN
IN
IN
Vi=4.2V
Vi=3.6V
Vi=3.3V
Vi=2.0V
Vi=1.3V
= 3.0V
= 2.6V
= 2.0V
1.0
1.0
200
Iload (mA)
V
V
IN
IN
Iload (mA)
10.0
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= 1.3V
= 1.0V
Iload (mA)
10.0
400
V
V
V
IN
IN
IN
= 3.0V
= 2.6V
= 2.0V
100.0
100.0
600
V
V
IN
IN
= 1.3V
= 1.0V
1000.0
1000.0
800