SP6641AEK-L-5-0 Exar Corporation, SP6641AEK-L-5-0 Datasheet - Page 10
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SP6641AEK-L-5-0
Manufacturer Part Number
SP6641AEK-L-5-0
Description
IC DC/DC CONV BOOST 5.0V SOT23-5
Manufacturer
Exar Corporation
Type
Step-Up (Boost)r
Datasheet
1.SP6641AEK-L-3-3.pdf
(13 pages)
Specifications of SP6641AEK-L-5-0
Package / Case
SOT-23-5, SC-74A, SOT-25
Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
5V
Current - Output
175mA
Voltage - Input
0.5 ~ 4.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Output Voltage
5 V
Output Current
100 mA, 175 mA, 275 mA, 500 mA
Input Voltage
2 V, 3.3 V
Operating Temperature Range
- 40 C to + 85 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Frequency - Switching
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
1016-1210
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SP6641AEK-L-5-0/TR
Manufacturer:
EXAR
Quantity:
5 064
APPLICATION INFORMATION: continued
Figure 15. SP6641A 3.3V Evaluation Board with SP6201 LDO Regulator
SuperCap Application on the
SP6641 Output
When the battery input to SP6641A is removed,
the SP6641A output will end up in the charge
mode and will slowly discharge a Supercap
connected to the output. The typical Supercap
of 0.22F will go from fully charged at 3.3V to
less than 2V in 5 minutes. The following appli-
TABLE 2. SP6641A Resistive Load Current in Startup - low cost inductors
Rev. 5/26/05, *Patent Pending
SP6641A APPLICATION CIRCUIT WITH PANASONIC INDUCTOR
0.86
0.88
0.90
0.95
1.00
1.10
1.20
1.30
1.40
1.50
L1 = ELJ-PB220KF 22µH, IDCmax = 300mA, DCR = 1.0Ω
V
V
IN
D1
+0.9V to +3.3V Input
R
OUT
Startup
16000
1500
V
Load
800
230
125
BATT
73
58
50
43
39
22µF
Ω
(min)
C2
+
1
2
3
Startup
3.31
3.31
3.30
3.30
3.30
3.29
3.29
3.28
3.28
3.28
V
after
LX
GND
V
OUT
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
V
OUT
22µH
SP6641
L1
U1
SHDN
V
Startup
®
®
BATT
after
I
0.2
mA
14
26
45
57
66
76
84
22µF
OUT
2
4
C1
5
4
+
1
2
3
mA (max)
Startup
Load
then
37
39
40
44
48
56
63
71
78
86
J1
10
L1 = NLC453232T-220K 22µH, IDCmax = 370mA, DCR = 0.9Ω
V
+3.3V
OUT
cation circuit in figure 16 is recommended to
disconnect the SP6641 output from the SuperCap
when the battery is removed. The small SOT23-
3pin MOS switches are an inexpensive addition
to the SP6641 circuit and work well to maintain
SuperCap voltage to retain Non-Volatile CMOS
Memory while a battery is changed.
0.86
0.88
0.90
0.95
1.00
1.10
1.20
1.30
1.40
1.50
SP6641A APPLICATION CIRCUIT WITH TDK INDUCTOR
V
V
IN
R
OUT
16000
Startup
1500
Load
900
260
126
1
2
3
66
49
43
39
36
Ω
(min)
ENABLE
V
GND
IN
SP6201
Startup
3.30
3.30
3.30
3.30
3.30
3.29
3.29
3.29
3.29
3.29
V
after
OUT
V
© Copyright 2002 Sipex Corporation
RESET
®
®
V
OUT
Startup
5
4
after
I
0.2
mA
13
26
50
67
77
84
91
OUT
2
4
V
+3.0V
mA (max)
OUT
C3
1µF
Startup
Load
then
42
43
44
48
52
60
69
77
84
91