=

=

\

=

´

´

DROOP

CSINT

CSINT

LOAD _ LINE

DROOP

OUT

DROOP

M

LOAD _ LINE

M

V

A

A

R

R

I

R

g

R

g

´

=

´

CSINT

OUT

DROOP

DROOP

M

A

I

V

R

g

0.65

0.67

0.69

0.71

0.73

0.75

0.77

0.79

0.81

0.83

0.85

1

2

3

4

5

6

Output Current (A)

Non−Droop Configuration

TPS53317

www.ti.com

SLUSAK4D – JUNE 2011 – REVISED JULY 2015

Device Functional Modes (continued)

Figure 23 shows shows the load regulation using non-droop configuration.

The applied step load is from 0 A to 2 A.

CH 3: SW

(20 mV/div)

(1 A/div)

(1 V/div)

Figure 24. Non-Droop Configuration Transient Response

Figure 23. Load Regulation (Non-Droop Configuration)

7.4.2 Droop Configuration

specification. Based on the actual tolerance requirement of the application, load-line set points can be defined to

maximize either cost savings (by reducing output capacitors) or power reduction benefits.

Accurate droop voltage response is provided by the finite gain of the droop amplifier. The equation for droop

voltage is shown in Equation 5.

where

•

low-side on-resistance is used as the current sensing element

•

•

•

•

(5)

(6)

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