sp6645eu-tr Exar Corporation, sp6645eu-tr Datasheet - Page 6

• Manufacturer Part Number: sp6645eu-tr
• Description: Sp6645 -single/dual Alkaline Cell, High Efficiency Boost Dc-dc Regulator
• Manufacturer: Exar Corporation

Figure 21. SP6644/6201 DC/DC LDO Output Ripple
Voltage (Vout=3.3V), Rlim=2.5k, Li=22µH Sumida CD-
43, Refer to Figure 30
Refer to the circuit in Figure 28, T
Figure 19. SP6644/6201 DC/DC LDO Maximum Load
Current vs. Vbatt (Vout=3.3V), Rlim=2.5k, Li=22µH
Sumida CD-43, Refer to Figure 30
Date: 11/30/04
Figure 23. Line Transient Response, (Vout=3.3V),
Rlim=2.5k, Iload=22µH Sumida CD-43
Figure 17. SP6644/6201 DC/DC LDO Combination
Efficiency vs. Output Current (Vout=3.3V), Rlim=2.5k,
Li=22µH Sumida CD-43, Refer to Figure 30
100
90
80
70
60
50
40
30
0.1
240
220
200
180
160
140
120
100
80
60
40
20
0
0.0
1.0
1.0
Iload (mA)
10.0
AMB
Vbatt (V)
2.0
= +25
100.0
o
C unless otherwise noted.
SP6644/6645 High Efficiency Boost Regulator
3.0
1000.0
SP6201 Out
10mV/div
SP6644 Out
20mV/div
V
50mV/div
V
1V/div
OUT
BATT
Vb=1.0V
Vb=1.3V
Vb=2.0V
Vb=2.6V
Vb=3.2V
4.0
6
Figure 20. SP6644/6201 DC/DC LDO No-Load Ibatt vs.
Vbatt (Vout=3.3V), Rlim=2.5k, Li=22µH Sumida CD-
43, Refer to Figure 30
Figure 22. Load Transient Response, Vbatt=1.3V,
(Vout=3.3V), Rlim=2.5k, Li=22µH Sumida CD-43
Figure 18. SP6644/6201 LDO Line/Load Rejection vs.
Output Current (Vout=3.3V), Rlim=2.5k, Li=22µH
Sumida CD-43, Refer to Figure 30
Figure 24. Switching Waveforms, (Vout=3.3V),
Vbatt=1.3V, Rlim=2.5k, Iload=10mA, Li=22µH Sumida
CD-43
10000
1000
PERFORMANCE CHARACTERISTICS
100
3.037
3.036
3.035
3.034
3.033
3.032
10
0.0
0
20 40
0.5
60 80 100 120 140 160 180 200
1.0
Iload (mA)
1.5
Vbatt (V)
© Copyright 2004 Sipex Corporation
2.0
2.5
Li
0.2A/div
V
1V/div
OUT
Li
0.5A/div
V
50mV/div
V
50mV/div
OUT
BATT
3.0
, V
LX
,V
BATT
Vb=1.3V
Vb=2.6V
3.5