Datasheet

TPS60300, TPS60301, TPS60302, TPS60303
SINGLE-CELL TO 3.0-V/3.3-V, 20-mA DUAL OUTPUT,
HIGH-EFFICIENCY CHARGE PUMP
SLVS302A – DECEMBER 2000 – REVISED MARCH 2001
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
OUT1
5
+
C
(OUT1)
1 µF
OUT2
6
+
C
(OUT2)
1 µF
OUTPUT
3.3 V, 20 mA
R1
10
PG
V
IN
3
C
IN
1 µF
INPUT
0.9 V to 1.8 V
1
EN
OFF/ON
GND
9
TPS60300
PG
7
8
C
2F
1 µF
C2+
C2–
C1+
C1–
C
1F
1 µF
4
2
+
Figure 20. Typical Operating Circuit
For the maximum output current and best performance, five ceramic capacitors of 1 µF are recommended. For
lower currents or higher allowed output voltage ripple, other capacitors can be used. It is recommended that the
input and output capacitors have a minimum value of 1 µF. This value is necessary to assure a stable operation
of the system due to the linear mode. With flying capacitors lower than 1 µF, the maximum output power will
decrease. This means that the device will work in the linear mode with lower output currents.
output filter design
The power-good output is capable of driving light loads up to 5 mA (see Figure 21). Therefore, the output
resistance of the power-good pin, in addition with an output capacitor, can be used as an RC-filter.
_
+
Charge Pumps,
Logic and Control
C
1F
C1+C1–
_
+
V
ref
C2+C2–
C
2F
OUT2
C
(OUT2)
OUT1
C
(OUT1)
PG
C
PG
R
(PG1)
R
(PG0)
GND
V
IN
EN
Figure 21. TPS60302, TPS60303 Push-Pull Power-Good Output-Stage as Filtered Supply