LTC1877 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1877' PDF : 16 Pages View PDF
LTC1877
APPLICATIONS INFORMATION
220pF
1
RUN
PLL LPF 8
2
ITH
SYNC/MODE 7
10µF**
CER
VIN
2.7V
TO 4.2V
LTC1877
3
VFB
4
GND
6
VIN
SW
5
15µH*
887k
VOUT
2.5V
+
47µF***
412k
20pF
*SUMIDA CD54-150
**TAIYO YUDEN CERAMIC LMK325BJ106MN
***SANYO POSCAP 6TPA47M
1877 F08a
95
VIN = 3.0V
90
85
80
VIN = 4.2V
75
VIN = 3.6V
70
65
60
55
50
0.1
VOUT = 2.5V
L = 15µH
1.0
10
100
OUTPUT CURRENT (mA)
1000
1877 • F08b
Figure 8. Single Lithium-Ion to 2.5V/0.3A Regulator from Design Example
TYPICAL APPLICATIONS
Dual Lithium-Ion to 2.5V/0.6A Regulator
Using All Ceramic Capacitors
1
RUN
PLL LPF 8
2
ITH
7
SYNC/MODE
220pF
LTC1877
3
VFB
6
VIN
4
GND
5
SW
15µH*
*SUMIDA CD54-150
**TAIYO YUDEN CERAMIC LMK325BJ106MN
***TAIYO YUDEN CERAMIC JMK325BJ226MM
CIN**
10µF
CER
20pF 887k
412k
VIN
≤ 8.4V
VOUT
2.5V/0.6A
COUT***
22µF
CER
1877 TA03
4-to 6-Cell NiCd/NiMH to 1.8V/0.6A Regulator
Using All Ceramic Capacitors
14
1
RUN
PLL LPF 8
2
ITH
7
SYNC/MODE
220pF
LTC1877
3
VFB
4
GND
VIN 6
5
SW
10µH*
*TOKO D62CB A920CY-100M
**TAIYO YUDEN CERAMIC LMK325BJ106MN
***TAIYO YUDEN CERAMIC JMK325BJ226MM
CIN**
10µF
CER
20pF 887k
698k
VIN
≤ 9V
VOUT
1.8V/0.6A
COUT***
22µF
CER
1877 TA04
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