14

LTC1878

APPLICATIO S I FOR ATIO

Figure 8. Single Lithium-Ion to 2.5V/0.3A Regulator from Design Example

2.5V

*

**

***

220pF

22

µF**

CER

15

µH*

887k

47

µF***

412k

LTC1878

RUN

GND

8

7

6

5

1

2

3

4

PLL LPF

SYNC/MODE

SW

2.65V

TO 4.2V

SUMIDA CD54-150

TAIYO-YUDEN CERAMIC JMK325BJ226MM

SANYO POSCAP 6TPA47M

1878 F08a

+

20pF

OUTPUT CURRENT (mA)

75

80

85

90

95

0.1

10

100

1000

70

1

L = 15

µH

1878 F08b

TYPICAL APPLICATIO S

2.5V

0.6A

22

µF

CER

20pF

887k

22

µF

CER

*

**

220pF

10

µH*

LTC1878

RUN

GND

8

7

6

5

1

2

3

4

PLL LPF

SYNC/MODE

SW

3V TO 4.2V

TOKO D62CB A920CY-100M

TAIYO-YUDEN CERAMIC JMK325BJ226MM

1878 TA03

412k

1.8V

0.5A

22

µF

CER

20pF

887k

22

µF

CER

*

**

220pF

10

µH*

LTC1878

RUN

GND

8

7

6

5

1

2

3

4

PLL LPF

SYNC/MODE

SW

2.7V TO 6V

TOKO D62CB A920CY-100M

TAIYO-YUDEN CERAMIC JMK325BJ226MM

1878 TA04

698k

Single Li-Ion to 2.5V/0.6A Regulator

Using All Ceramic Capacitors

3- to 4-Cell NiCd/NiMH to 1.8V/0.5A Regulator

Using All Ceramic Capacitors