TPS60310, TPS60311, TPS60312, TPS60313

SINGLE-CELL TO 3-V/3.3-V, 20-mA DUAL OUTPUT,

HIGH-EFFICIENCY CHARGE PUMP WITH SNOOZE MODE

SLVS362A – MAY 2001 – REVISED AUGUST 2001

16

POST OFFICE BOX 655303

APPLICATION INFORMATION

output filter design (continued)

by:

ƒc +

1

2

pR

(PG,1)

C

PG

(1)

V

(PG,1)

V

O(OUT2)

+

1

1

) 2pƒR

(PG,1)

C

PG

2

(2)

V

(PG,1)

V

O(OUT2)

+ 0.175

(3)

Load current sourced by power-good output reduces maximum output current at OUT2. During start-up

reduce output ripple and noise.

OUT1

5

+

C(OUT1)

1

µF

OUT2

6

C(OUT2)

1

µF

R1

10

PG

VIN

3

CIN

1

µF

INPUT

0.9 V to 1.8 V

1

SNOOZE

ON/OFF

GND

9

TPS60310

PG

7

8

C2F

1

µF

C2+

C2–

C1+

C1–

C1F

1

µF

4

2

LP

CP

VP(OUT)

++

Figure 24. LC-Post Filter

Table 4. Recommended Values for Lowest Output Voltage Ripple

VIN

IO(OUT2)

CIN[µF]

CXF[µF]

COUT[µF]

L[ H]

CP[µF]

VP(OUT)

VIN

[V]

IO(OUT2)

[mA]

CIN[µF]

CERAMIC

CXF[µF]

CERAMIC

COUT[µF]

CERAMIC

LP[µH]

CP[µF]

CERAMIC

VP(OUT)

VP–P[mV]

0.9

…1.8

20

1

1

1

0.1

0.1 (X7R)

16

0.9

…1.8

20

1

1

1

0.1

1 // 0.1 (X7R)

12

0.9

…1.8

20

1

1

1

1

0.1 (X7R)

14

0.9

…1.8

20

1

1

1

1

1 // 0.1 (X7R)

3