RT3612EB datasheet(32/47 Pages) RICHTEK

Part #	RT3612EB

Description	2-Phase PWM Controller with Dual Integrated Drivers for IMVP9 CPU Core Power Supply

PDF	47 Pages

Scroll/Zoom	100%

Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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32 / 47 page

RT3612EB

DS3612EB-02 December 2019

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Dual Ramp Mechanism

Normal controllers easily suffer jitter and stability issues

under low equivalent series resistance (ESR) of capacitor

application and large loop delay condition. The large Loop

delay often comes from PCB parasitic inductance. Figure

17 illustrates how PCB parasitic inductance impact the

load transient response. The PCB parasitic inductance

delays energy delivering and causes VSEN to keep falling.

The dropping VSEN induces several successive PWM

pulses and then VSEN ring-back occurs. While load

current release at the ring back region, it will generate

large overshoot. Thus more capacitors will use for the

overshoot reduction.

Figure 17. Load Transient Response with PCB Parasitic Inductance

Loading Current

ΔIcc

VSEN

PH1

PH2

RT3612EB Datasheet(PDF) 32 Page - Richtek Technology Corporation