MAX8688ALETG/GH9 Maxim Integrated, MAX8688ALETG/GH9 Datasheet - Page 11

• Manufacturer Part Number: MAX8688ALETG/GH9
• Description: Current & Power Monitors & Regulators
• Manufacturer: Maxim Integrated

Specifications of MAX8688ALETG/GH9

• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Operating Temperature Range: - 40 C to + 85 C

Since the reference voltage input is provided by the
MAX8688, the REFIN mode provides complete control
of the POL in terms of soft-start, soft-stop, and margin-
ing transitions. It may be noted that the slew rates dur-
ing soft-start (t
(VOUT_TRANSITION_RATE) should be programmed
with POL current-limit consideration. An excessively
fast slew rate causes the POL to trip due to overcurrent.
A general guideline for setting the output-voltage slew
rate is as follows:
Figure 3. Typical System Application—REFIN Mode
0.1µF
CONTROLLER
SYSTEM
3.3V
CLKOUT
SLEW RATE
IRQ
ON_RISE
______________________________________________________________________________________
Digital Power-Supply Controller/Monitor
A1/SCLE
A2/SDAE
A3/ONOFF
SCL
SDA
RST
FLT
CLKIO
≤
) and during margining
(
I
LIMIT
C
OUT
−
DVDD
DGND
PMBus COMMAND AND
I
LOAD
STATUS REGISTERS
CONTROLLER
SMBus
)
POWER MONITOR
MAXQ µC
MAX8688
INTERNAL REFERENCE
TEMP SENSOR
ADC
DAC
where C
put, I
POL, and I
On receipt of either an OPERATION OFF command or a
turn-off signal from A3/ONOFF, the MAX8688 com-
mences the shutdown operation that has been pro-
grammed for the POL being controlled. After the
programmed t
down the output voltage to zero precisely in the pro-
grammed t
ENOUT output.
with PMBus Interface
AGND
AVDD
LOAD
OUT
OFF_FALL
LIMIT
is the load current being delivered by the
S1
is the output capacitance on the POL out-
200Ω
200Ω
OFF_DELAY
is the current-limit setting of the POL.
DACOUT
ENOUT
ISN_C
time, and deasserts its open-drain
RS_C
REFO
ISN+
ISN-
RS+
RS-
time, the MAX8688 ramps
0.1µF
1µF
REFIN
EN
VO+
R
SENSE
LOAD
POL
VO-
V
V
IN+
IN-
11