LTC1878 LINER [Linear Technology], LTC1878 Datasheet - Page 14

• Manufacturer Part Number: LTC1878
• Description: High Efficiency Monolithic Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
LTC1878
14
TYPICAL APPLICATIO S
220pF
412k
220pF
220pF
1
2
3
4
U
RUN
I
V
GND
TH
FB
LTC1878
SYNC/MODE
887k
20pF
U
**
PLL LPF
Figure 8. Single Lithium-Ion to 2.5V/0.3A Regulator from Design Example
**
*
*
TOKO D62CB A920CY-100M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
TOKO D62CB A920CY-100M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
SW
1
2
3
4
V
1
2
3
4
IN
***
**
RUN
I
V
GND
RUN
I
V
GND
TH
TH
*
FB
8
7
6
5
FB
SUMIDA CD54-150
TAIYO-YUDEN CERAMIC JMK325BJ226MM
SANYO POSCAP 6TPA47M
U
47 F***
LTC1878
W
15 H*
LTC1878
SYNC/MODE
SYNC/MODE
22 F**
CER
PLL LPF
3- to 4-Cell NiCd/NiMH to 1.8V/0.5A Regulator
PLL LPF
+
SW
V
SW
V
IN
IN
Single Li-Ion to 2.5V/0.6A Regulator
8
7
6
5
8
7
6
5
Using All Ceramic Capacitors
Using All Ceramic Capacitors
1878 F08a
U
V
2.65V
TO 4.2V
V
2.5V
10 H*
10 H*
IN
OUT
20pF
20pF
887k
412k
887k
698k
1878 TA03
1878 TA04
C
22 F
CER
C
22 F
CER
OUT
OUT
95
90
85
80
75
70
**
**
0.1
V
L = 15 H
V
2.5V
0.6A
OUT
OUT
V
1.8V
0.5A
OUT
V
IN
= 2.5V
= 4.2V
V
1
OUTPUT CURRENT (mA)
IN
= 3V
C
22 F
CER
C
22 F
CER
V
IN
IN
IN
**
**
= 3.6V
10
V
3V TO 4.2V
V
2.7V TO 6V
IN
IN
100
1878 F08b
1000