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© 2006 Semtech Corp.

www.semtech.com

POWER MANAGEMENT

SC905A

Digital LDO Voltage Tables A and B

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 for LDO CORE, and Table B for bitcodes and their corresponding

voltages for LDOs PAD, MOT and CAM.

TABLE A - Output Voltage Code Bits for VCORE

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.)