CAT661EVA-GT3 ON Semiconductor, CAT661EVA-GT3 Datasheet - Page 11

• Manufacturer Part Number: CAT661EVA-GT3
• Description: Charge Pumps CHG PUMP VOLT CONVERTER
• Manufacturer: ON Semiconductor

Specifications of CAT661EVA-GT3

• Rohs: yes
• Function: Inverting
• Output Voltage: 5 V to 11 V
• Output Current: 100 mA
• Supply Current: 0.5 mA
• Maximum Operating Temperature: + 105 C
• Package / Case: SOIC-8
• Input Voltage: 2.5 V to 5.5 V
• Maximum Power Dissipation: 500 mW
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Switching Frequency: 12.5 KHz

Typical Applications
Voltage Inversion Positive−to−Negative
The LV pin may be left floating for positive input voltages at or above 3.3 V.
Positive Voltage Doubler
The CAT661 easily provides a negative supply voltage from a positive supply in the system. Figure 24 shows a typical circuit.
The voltage doubler circuit shown in Figure 25 gives V
2.5 V to 5.5 V
V
IN
C1
*SCHOTTKY DIODE IS FOR START−UP ONLY
+
NC
150 mF
C1
+
1
2
3
4
BOOST/FC
CAP+
GND
CAP−
Figure 25. Voltage Doubler
Figure 24. Voltage Inverter
CAT661
http://onsemi.com
1
2
3
4
1N5817*
BOOST/FC
CAP+
GND
CAP−
OUT
CAT661
OSC
OUT
11
V+
LV
= 2 x V
8
7
6
5
OSC
OUT
IN
V+
LV
for input voltages from 2.5 V to 5.5 V.
+
8
7
6
5
C2
1.5 V to 5.5 V
+
V
IN
V
OUT
C2
150 mF
= −V
V
IN
OUT
= 2V
IN