MAX17480 Maxim Integrated Products, MAX17480 Datasheet - Page 20

• Manufacturer Part Number: MAX17480
• Description: AMD 2-/3-Output Mobile Serial VID Controller
• Manufacturer: Maxim Integrated Products

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AMD 2-/3-Output Mobile Serial
VID Controller
20
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PIN
EP
39
40
NAME
PGND
TIME
OSC
Oscillator Adjustment Input. Connect a resistor (R
frequency (per phase):
A 71.4k
respectively, for SMPS1 and SMPS2. SMPS3 runs at twice the programmed switching frequency.
Switching frequency selection is limited by the minimum on-time. See the Core Switching
Frequency description in the SMPS Design Procedure section.
Slew-Rate Adjustment Pin. The total resistance R
where R
This slew rate applies to both upward and downward VID transitions, and to the transition from boot
mode to VID mode. Downward VID transition slew rate in skip mode can appear slower because the
output transition is not forced by the SMPS.
The slew rate for startup is fixed at 1mV/µs.
Exposed Pad. Power ground connection and source connection of the internal low-side MOSFET.
TIME
to 432k
is between 35.7k
resistor corresponds to switching frequencies of 600kHz to 100kHz,
PWM slew rate = (6.25mV/µs) x (143k /R
and 357k .
f
OSC
= 300kHz x 143k /R
FUNCTION
TIME
OSC
Pin Description (continued)
) between OSC and GND to set the switching
from TIME to GND sets the internal slew rate:
OSC
TIME
)