RT9245 View Datasheet(PDF) - Richtek Technology

Part Name

Description

View to exact match

RT9245

Multi-Phase PWM Controller for CPU Core Power Supply

Richtek Technology 

RT9245

Error Amplifier Characteristic

For fast response of converter to meet stringent output

current transient response, RT9245 provides large slew

VFB

rate capability and high gain-bandwidth performance.

EA Falling Slew Rate

EA Rising Slew Rate

VFB

VCOMP CH1:(500mV/Div)

CH2:(2V/Div)

Time (250ns/Div)

Figure 21. EA Rising Transient with 10pF Loading; Slew

Rate=10V/us

VCOMP

CH1:(500mV/Div)

CH2:(2V/Div)

Time (250ns/Div)

Figure 22. EA Falling Transient with 10pF Loading;

Slew Rate=8V/us

4.7k

B 4.7k

-

EA

A

+

VREF

Figure 23. Gain-Bandwidth Measurement by signal A

divided by signal B

0dB

180°

Figure 24. EA Frequency Response with closed loop gain set at 0db to observe gain-bandwidth product; -3dB at

10.86MHz

www.richtek.com

16

DS9245-06 March 2007

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