MAX15569 Datasheet, PDF (28/41 Pages) Maxim Integrated Products – 2-Phase/1-Phase QuickTune-PWM Controller with Serial I2C Interface

MAX15569
2-Phase/1-Phase QuickTune-PWM Controller with
Serial I²C Interface
Table 4. I²C Command and Data Register Summary
COMMAND
HEX
00h
01h
NAME
—
—
MASTER
PAYLOAD
WRITE
—
—
SLAVE
PAYLOAD
READ
—
—
Reserved.
Reserved.
DESCRIPTION
02h
VOUTMAX
Configures
maximum output
code
The maximum allowable output voltage (0.510V to 1.76V) that can
Returns maximum be set by user. In case the I²C interface receives a set voltage
output code command higher than the VOUTMAX value, the regulator slews the
output to VOUTMAX set voltage. Default is 51h (1.3V).
03h
—
—
04h
STATUS
—
—
Regulator
status
Reserved.
Bits D[5:0] of this register consist of the VRHOT flag (bit D5),
undervoltage flag (bit D4), overvoltage flag (bit D3), overcurrent
flag (bit D2), VOUTMAX flag (bit D1), and INT flag (bit D0). Bits
D[7:6] are not used and return 0. For a detailed description, see
the Regulator Status (0x04h) section. The STATUS register is set
regardless of the MASK register (0x05) content.
Writing to this register prevents the assertion of the INT output when
05h
MASK
Configures mask
status
Current mask the specific fault or alarm is masked. This register does not mask
status
the STATUS register indication.
Default is 00h (no masking).
Configures the
06h SLEW_RATE output-voltage
slew rate
07h SETVOUT
Selects the
output code
08h
IMON
—
Returns the
output-voltage
slew rate
Writing to this register sets the slew rate (volt/second) of the
output voltage during the initial startup and dynamic output-voltage
transitions.
Default is 04h (4.5mV/µs for soft-start and 9mV/µs for dynamic
transitions).
Returns the
output code
The 07h command sets the target output voltage. The regulator
transitions up or down to the new output voltage 0.5µs after the
command is acknowledged.
Default is 33h (1V).
Returns the output This register returns the average output current value. IMON is
current value updated every 400µs.
I²C Commands and Registers
The device supports the following commands and
registers shown in Table 4.
VOUTMAX Control (0x02h)
This register is programmed by the bus master to the
maximum output voltage the regulator is allowed to sup-
port. Any attempts to set the SETVOUT above VOUTMAX
are acknowledged by setting the output voltage to the
content of the VOUTMAX register. The default value is
51h (1.3V). See Table 5 for bit descriptions.
Regulator Status (0x04h)
This register consists of six flags that determine the status
of the regulator in case of thermal warning, overvoltage
fault, undervoltage fault, output overcurrent warning, and
maximum output violation. The INT bit (D0) is asserted in
case of any unmasked event. See Table 6 for bit descrip-
tions.
1) The VRHOT bit (D5) is set when the voltage at
THERM pin goes below its nominal threshold (see the
Electrical Characteristics section).
2) The UV bit (D4) is set when the output voltage drops
200mV lower than SETVOUT value for 200µs.
www.maximintegrated.com
Maxim Integrated │  28