MAX17082GTL+ Maxim Integrated Products, MAX17082GTL+ Datasheet - Page 38

• Manufacturer Part Number: MAX17082GTL+
• Description: IC CTLR PWM DUAL IMVP-6.5 40TQFN
• Manufacturer: Maxim Integrated Products
• Series: Quick-PWM™r

Specifications of MAX17082GTL+

• Applications: Controller, Intel IMVP-6.5™
• Voltage - Input: 4.5 ~ 5.5 V
• Number Of Outputs: 1
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 40-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details

Dual-Phase, Quick-PWM Controllers for
IMVP-6+/IMVP-6.5 CPU Core Power Supplies
The MAX17021/MAX17082/MAX17482 are enabled
when SHDN is driven high (Figure 10). The internal ref-
erence powers up first. Once the reference exceeds its
UVLO threshold, the internal analog blocks are turned
on and masked by a 50μs one-shot delay. The PWM
controller is then enabled.
Power-on reset (POR) occurs when V
approximately 2V, resetting the fault latch and prepar-
ing the controller for operation. The V
inhibits switching until V
troller powers up the reference once the system
enables the controller, V
is driven high. With the reference in regulation, the con-
troller ramps the output voltage to the boot voltage
(1.2V for MAX17021 IMVP-6+ and 1.1V for MAX17082/
MAX17482 IMVP-6.5) at 1/8 the slew rate set by R
where dV
slew rate. The soft-start circuitry does not use a variable
Figure 10. Power-Up and Shutdown Sequence Timing Diagram
38
______________________________________________________________________________________
PWM CONTROL
VID (D0–D6)
INTERNAL
PHASEGD
TARGET
PWRGD
CLKEN
SHDN
V
CORE
1/8 SLEW RATE SET
V
Power-Up Sequence (POR, UVLO)
CC
t
TRAN START
SOFT-START =
/dt = 12.5mV/μs x 71.5kΩ/R
BY R
(
TIME
CC
CC
)
INVALID
=
rises above 4.25V. The con-
CODE
is above 4.25V, and SHDN
(
60μs TYP
dV
t
BLANK
8
TARGET
V
BOOT
SKIP
CC
V
BOOT
CC
dt
UVLO circuitry
)
rises above
FORCED PWM
TIME
TIME
is the
t
20μs TYP
BLANK
:
current limit, so full output current is available immediate-
ly. CLKEN is pulled low approximately 60μs after the
MAX17021/MAX17082/MAX17482 reach the boot voltage
if PGDIN is high. At the same time, the MAX17021/
MAX17082/MAX17482 slew the output to the voltage set
at the VID inputs at the programmed slew rate. PWRGD
and PHASEGD become high impedance approximately
5ms after CLKEN is pulled low. The MAX17021/
MAX17082/MAX17482 automatically use forced-PWM
operation during soft-start and soft-shutdown, regardless
of the DPRSLPVR and PSI configuration.
For automatic startup, the battery voltage should be
present before V
the output into regulation without the battery voltage
present, the fault latch trips. The controller remains shut
down until the fault latch is cleared by toggling SHDN
or cycling the V
If the V
assumes that there is not enough supply voltage to
make valid decisions. To protect the output from over-
voltage faults, the controller shuts down immediately
and forces a high-impedance output.
5ms TYP
t
BLANK
CC
voltage drops below 4.25V, the controller
CC
CC
FORCED PWM
power supply below 0.5V.
. If the controller attempts to bring
t
60μs TYP
BLANK
INVALID
CODE
SOFT-SHUTDOWN =
1/8 SLEW RATE SET
BY R
TIME