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SP6651EB

Evaluation Board Manual

High Efficiency Synchronous

Step-Down Converter with up to

98% efficiency

800mA Output Current, only

20uA Quiescent Current

2.7V-6.5V Input Voltage range,

Output Adjustable down to 0.8V

MSOP Package & Ceramic

Capacitors for small, low profile

Power Supply

Ideal for PDAs, Digital Cameras,

Wireless Modems, Cellular

Telephones

DESCRIPTION

The

SP6651A Evaluation Board

is designed to help the user evaluate the performance

of the SP6651A for use as a single Li-Ion battery Step-Down DC-DC Converter. The

SP6651A operates from 2.7V to 6.5V input, with the highest efficiency in the range 3.0V

to 4.2V where the Li-Ion battery has the most energy. The SP6651A evaluation board

is a complete power supply circuit to provide ease of evaluation for the DC/DC

Converter performance.

FIGURE 1. SP6651A 3.3V OUTPUT EVALUATION BOARD SCHEMATIC

Vin 2.7 - 6.5VDC

CIN

22uF

RV IN

10.0

BLON

U1

1

2

PV in

V in

BLON

D1

D0

LX

PGND

GND

V out

FB

10

9

8

7

6

L1

10uH

Vout 3.3V 800mA

RF

825K

1

3

4

5

D1

J1

2

3

1

CF

22pF

COUT

22uF

RI

261K

SP6651A

CV IN

1.0uF

D0

J2

2

3

1

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