MAX17082GTL+ Maxim Integrated Products, MAX17082GTL+ Datasheet - Page 14

• 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
(Circuit of Figure 1. V
14
PIN
1
2
3
______________________________________________________________________________________
0.875V
(MAX17082/
5V
5V
MAX17482
0
0
0
PGDIN
NAME
THRM
IMON
only)
A. V
B. DL_, 5V/div
OUTPUT OVERVOLTAGE WAVEFORM
OUT
, 500mV/div
IN
= 12V, V
System Power-Good Logic Input. PGDIN indicates the power status of other system rails and is used for
power-supply sequencing. After power-up to the boot voltage, the output voltage remains at V
remains high, and PWRGD remains low as long as the PGDIN stays low. When PGDIN is pulled high, the
output transitions to selected VID voltage, and
normal operation, the MAX17021/MAX17082/MAX17482 immediately drive
and slew the output to the boot voltage (using two-phase pulse-skipping mode). The controller remains at
the boot voltage until PGDIN goes high again,
Input of Internal Comparator. Connect the output of a resistor- and thermistor-divider (between V
GND) to THRM. Select the components such that the voltage at THRM falls below 1.5V (30% of V
the desired high temperature.
Current-Monitor Output. The MAX17082/MAX17482 IMON output source a current that is directly
proportional to the current-sense voltage as defined by:
where G
The IMON current is unidirectional (sources current out of IMON only) for positive current-sense values.
For negative current-sense voltages, the IMON current is zero.
Connect an external resistor between IMON and VSS_SENSE to create the desired IMON gain based on
the following equation:
where IMAX is defined in the Current Monitor section of the Intel IMVP-6.5 specification and based on
discrete increments (20A, 30A, 40A, etc.), R
element (sense resistor or inductor DCR) that is used to provide the current-sense voltage, and
G
table.
The IMON voltage is internally clamped to a maximum of 1.1V (typ).
The transconductance amplifier and voltage clamp are internally compensated, so IMON cannot directly
drive large capacitance values. To filter the IMON signal, use an RC filter as shown in Figure 2.
IMON is pulled to ground when MAX17082/MAX17482 are in shutdown.
m(IMON)
100μs/div
CC
m(IMON)
= V
is the typical transconductance amplifier gain as defined in the Electrical Characteristics
C. PWRGD, 5V/div
DD
MAX17021 toc23
= 5V, SHDN = V
= 2.4mS (typ).
Typical Operating Characteristics (continued)
A
B
C
R
IMON
CC
I
, D0–D6 set for 1.075V, T
IMON
= 0.999V/(IMAX x R
= G
m(IMON)
SENSE
FUNCTION
is the typical effective value of the current-sense
is toggled, or the V
x (V
0.875V
is pulled low. If the system pulls PGDIN low during
10A
5V
5V
5V
SENSE
CSP_
0
0
0
0
A. 5V BIAS SUPPLY, 5V/div
B. V
C. PWRGD, 5V/div
A
= +25°C, unless otherwise specified.)
OUT
- V
x G
, 500mV/div
CSN_
BIAS SUPPLY REMOVAL
m(IMON)
(UVLO RESPONSE)
)
CC
40μs/div
input power supply is cycled.
)
Pin Description
high, pull PWRGD low,
D. DL_, 5V/div
E. I
I
LX1
OUT
MAX17021 toc24
, 10A/div
= 10A
BOOT
A
B
C
D
E
CC
,
CC
and
) at