MP86920

– 16V, INTELLI-PHASETM SOLUTION IN LGA-27 (4mmx5mm) PACKAGE

MP86920 Rev. 1.0

www.MonolithicPower.com

11

12/22/2020

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sinking small currents. This provides a sufficient

voltage level to meet the required operating

voltage range.

Figure 2 shows the typical circuit diagram for

the CS pin connection to achieve a differential

voltage source proportional to the inductor

current.

VCS

SW

PWM

Intelli-Phase

TM

PWM

IL

VIN

VIN

GND

CS

RCS

VCM

ICS

Figure 2: Typical Circuit Diagram for CS Pin

Connection

Choose a value for RCS such that VCS stays

within its operating range. This relationship can

be calculated with Equation (1):

CS

CS

CM

0.8V

I

R

V

2.0V









(1)

Where VCM is the reference voltage connected

to RCS, and ICS is the current on the CS pin,

estimated with Equation (2):

CS

L

CS

I

I

G



(2)

The Intelli-

Phase’sTM current-sense output can

be used by the controller to accurately monitor

the output current. The cycle-by-cycle current

information from the CS pin can be used for

phase

current

balancing,

over-current

protection,

and

active

voltage

positioning

(output voltage droop).