PGOOD
V(SS)
VOUT
RT9245A
EA Rising Slew Rate
VFB
OV
Figure 23. Waveform for OV
Error Amplifier Characteristic
For fast response of converter to meet stringent output
current transient response, RT9245A provides large slew
rate capability and high gain-bandwidth performance.
EA Falling Slew Rate
VFB
VCOMP
CH1:(500mV/Div)
CH2:(2V/Div)
Time (250ns/Div)
Figure 25. EA Falling Transient with 10pF Loading;
Slew Rate = 8V/us
4.7k
B 4.7k
-
EA
A
+
VDAC
Figure 26. Gain-Bandwidth Measurement by signal A
divided by signal B
VCOMP CH1:(500mV/Div)
CH2:(2V/Div)
Time (250ns/Div)
Figure 24. EA Rising Transient with 10pF Loading; Slew
Rate = 8V/us
DS9245A-05 March 2007
www.richtek.com
19