RT9701
CH1
CH2
T
T
T
T
1 >
CH1
CH1: VIN : 1V/Div
1 >
CH2: VOUT : 1V/Div
2 >
CH2
CH1: VIN : 1V/Div
CH2: VOUT : 1V/Div
2 >
RL = 30 Ω, CL = 1µF
RL = 30 Ω, CL = 1µF
*Test Circuit 2
Time (500µS/Div)
Time (10mS/Div)
Inrush Short Circuit Response
Soft-start Short Circuit Response
T
V
DROP=1.2V, depend on CIN ESR
IPEAK : depend on ESR & ESL
T
1 >
1 >
CH1
CH1
CH1 : VIN : 2V/Div
CH2 : IL : 10A/Div
T
CH1 : VIN : 2V/Div
T
CH22 >
CH22 >
C IN
CH2 : IOUT : 1A/Div
= 1µF
CL = 1000µF
µ
IN = 1 F
C
µ
50µS/Div
25 S/Div
Ramped Load Response
Current Limit Response
4.9V
VOUT = 5V
T
VOUT = 4.6V
CH1
Loading trigger
1 >
CH1
Current Limit Threshold
1.1A
T
2 >
1 >
CH2
VIN = 5V, CL = 0.1µF
RL = 1Ωohm
CH22 >
CH2: I
: 1A/Div
5µS/Div
IOLUOTA:D1A/Div
CH2: IOUT : 500mA/Div VIN = 5V, CL = 1µF
1mS/Div
www.richtek-ic.com.tw
DS9701-05 October 2001
8
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
