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© 2006 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC905

Digital LDO Voltage Table A

A 5-bit linear DAC controls the output voltage of each LDO. The DAC and error-amp gain are scaled so that the LSB size

at the output is 50mV. Output voltage can be set by writing the proper code to the desired LDO register. See Table A

for the bitcodes and their corresponding voltages.

TABLE A - Output Voltage Code Bits for VCORE, VPAD, VMOT and VCAM

X4

X3

X2

X1

X0

LDO Output

Voltage

0

0

0

0

0

1.35V

0

0

0

0

1

1.40V

0

0

0

1

0

1.45V

0

0

0

1

1

1.50V

0

0

1

0

0

1.55V

0

0

1

0

1

1.60V

0

0

1

1

0

1.65V

0

0

1

1

1

1.70V

0

1

0

0

0

1.75V

0

1

0

0

1

1.80V

0

1

0

1

0

1.85V

0

1

0

1

1

1.90V

0

1

1

0

0

1.95V

0

1

1

0

1

2.00V

0

1

1

1

0

2.05V

0

1

1

1

1

2.10V

1

0

0

0

0

2.15V

1

0

0

0

1

2.20V

1

0

0

1

0

2.25V

1

0

0

1

1

2.30V

1

0

1

0

0

2.35V

1

0

1

0

1

2.40V

1

0

1

1

0

2.45V

1

0

1

1

1

2.50V

1

1

0

0

0

2.55V

1

1

0

0

1

2.60V

1

1

0

1

0

2.65V

1

1

0

1

1

2.70V

1

1

1

0

0

2.75V

1

1

1

0

1

2.80V

1

1

1

1

0

2.85V

1

1

1

1

1

2.90V

Register Map (Cont.)