Datasheet

15
LTC1878
TYPICAL APPLICATIO S
U
V
OUT
2.5V
0.3A
C
IN
**
22µF
CER
20pF
887k
C
OUT
***
47µF
6.3V
*
**
***
220pF
15µH*
LTC1878
RUN
I
TH
V
FB
GND
8
7
6
5
1
2
3
4
PLL LPF
SYNC/MODE
V
IN
SW
V
IN
2.65V TO 6V
SUMIDA CD54-150
TAIYO-YUDEN CERAMIC JMK325BJ226MM
SANYO POSCAP CTPA47M
1878 TA06
412k
+
Low Noise 2.5V/0.3A Regulator
V
OUT
2.5V
0.6A
C
IN
**
22µF
CER
20pF
EXT CLOCK
700kHz
887k
C
OUT
**
22µF
CER
*
**
220pF
10µH*
10k
0.01µF
LTC1878
RUN
I
TH
V
FB
GND
8
7
6
5
1
2
3
4
PLL LPF
SYNC/MODE
V
IN
SW
V
IN
3V TO 6V
TOKO D62CB A920CY-100M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
1878 TA04
412k
Externally Synchronized 2.5V/0.6A Regulator
Using All Ceramic Capacitors
3- to 4-Cell NiCd/NiMH to 3.3V/0.5A Regulator
Using All Ceramic Capacitors
V
OUT
†
3.3V
0.5A
C
IN
**
22µF
CER
20pF
887k
C
OUT
**
22µF
CER
*
**
†
220pF
10µH*
LTC1878
RUN
I
TH
V
FB
GND
8
7
6
5
1
2
3
4
PLL LPF
SYNC/MODE
V
IN
SW
V
IN
2.7V TO 6V
TOKO D62CB A920CY-100M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
V
OUT
CONNECTED TO V
IN
FOR 2.7V < V
IN
< 3.3V
1878 TA06
280k
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.