MCP19111 datasheet(45/222 Pages) MICROCHIP

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 2013 Microchip Technology Inc.

DS22331A-page 45

MCP19111

6.10

Output Voltage Configuration

Two registers control the error amplifier reference

voltage. The reference is coarsely set in 15 mV steps

and then finely adjusted in 0.82 mV steps above the

coarse setting (see Registers 6-10 and 6-11). Higher

output voltages can be achieved by using a voltage

divider connected between the output and the +VSEN

pin. Care must be taken to ensure maximum voltage

rating compliance on all pins.

Note:

The OVFCON<VOUTEN> bit must be set

to enable the output voltage setting

registers.

OVCCON: OUTPUT VOLTAGE SET POINT COARSE CONTROL REGISTER

R/W-0

OVC7

OVC6

OVC5

OVC4

OVC3

OVC2

OVC1

OVC0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-0

OVC<7:0>: Output Voltage Set Point Coarse Configuration bits

OVC<7:0>

= (VOUT/15.8 mV)+15.8 mV

OVFCON: OUTPUT VOLTAGE SET POINT FINE CONTROL REGISTER

R/W-0

U-0

R/W-0

VOUTEN

—

OVF4

OVF3

OVF2

OVF1

OVF0

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

VOUTEN: Output Voltage DAC Enable bit

= Output Voltage DAC is enabled

= Output Voltage DAC is disabled

bit 6-5

Unimplemented: Read as ‘0’

bit 4-0

OVF<4:0>: Output Voltage Set Point Coarse Configuration bits

OVF<4:0>

= (VOUT – VOUT_COARSE)/0.8 mV

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