SP6660DS/11

SP6660 200mA Charge Pump Inverter or Doubler

© Copyright 2000 Sipex Corporation

18

60

70

80

90

100

1

10

100

1000

Load Current (mA)

Vin = 3.0V

Vin = 3.3V

Vin = 3.6V

Figure 28. The SP6660 and a LDO Regulator Connected as a 3V Input to Regulated 5V Output Converter.

APPLICATIONS

The SP6660 Evaluation Board provides a 3V to

5V 160mA DC to DC Converter using the

SP6660 Doubler Circuit and a 5V LDO

Regulator.

V

IN

GND

CAP+

+

C3

150

µF

Tant.

C1

150

µF

Tant.

+

1

2

3

4

FC

CAP+

GND

CAP-

SP6660

8

7

6

5

V+

OSC

LV

OUT

DOUBLER

D1

C2

150

µF

Tant.

+

V

OUT

GND

FC

1

2

3

V

IN

GND

ON/OFF_N

LP2985

5

4

V

OUT

BYPASS

C5

10nF

Cer.

C4

4.7

µF

Cer.

+5

GND

Figure 29. Ripple and Noise output of the SP6660 and a

LDO Regulator with I

V

V

V

I

5VLDO Ripple

Figure 30. Power Efficiency vs Input Voltage - SP6660

Doubler with 5V LDO

Figure 31. Power Efficiency vs Load Current - SP6660

Doubler with 5V LDO

g

60

70

80

90

100

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Input Voltage (V)

IL = 150mA

Figure 32. Ripple Voltage vs Input Voltage -

SP6660 Doubler with 5V LDO

SP6660 Ripple

0

50

100

150

200

2.8

3.0

3.2

3.4

3.6

3.8

4.0

4.2

Input Voltage (V)

6660 Ripple

IL = 150mA

LDO Ripple

IL = 150mA