AN2808 datasheet(15/40 Pages) STMICROELECTRONICS

Part #	AN2808

Description	The PM6670S device is a complete

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 40 page

AN2808

Test setup

15/40

7.4

JP5 compensation network (COMP pin)

The JP5 jumper is located on the bottom side of the PM6670S board and is used to connect

the integrator input (COMP pin) to the output through a simple capacitor (integrative

compensation) or using the so-called "virtual ESR" network for very low-ESR output

capacitor applications (for example, all-ceramic output capacitor applications). The

integrative compensation is set by default.

Refer to the PM6670S datasheet for details on all-ceramic output capacitor applications and

the virtual-ESR design.

Figure 13.

JP5 (COMP) setting

Test setup

Figure 14 shows the suggested setup connections between the PM6670S board, the loads

and the external supply. The LDO input (LDOIN) is connected to VDDQ by default

(R6 = 0

Ω).

Virtual ESR Network

Integrative Compensation

(default position)

AM00650V1

AN2808 Datasheet(PDF) 15 Page - STMicroelectronics