Data Sheet

6 www.fairchildsemi.com
FAN2001/FAN2002 Rev. 1.0.2
FAN2001/FAN2002 1A High-Efficiency Step-Down DC-DC Converter
Typical Performance Characteristics (Contd.)
T
A
= 25°C, C
IN
= 10µF, C
OUT
= 20µF, L = 3.3µH, R
2
= 10KΩ, unless otherwise noted.
PWM Mode Power Save Mode
Time (1 µ s/div)
SW Node
(2V/div)
Voltage
Inductor
(200mA/div)
Current
Output
(5mV/div)
Voltage
Time (5 µ s/div)
SW Node
(2V/div)
Voltage
Output
(20mV/div)
Voltage
Inductor
(200mA/div)
Current
Time (10 µ s/div)
Load Transient Response
Output
(50mV/div)
Voltage
Inductor
(500mA/div)
Current
600mA
100mA
Load Transient Response
Time (10 µ s/div)
Output
(50mV/div)
Voltage
Inductor
(500mA/div)
Current
Voltage at
Enable Pin
600mA
100mA
V
OUT
= 1.2V
Start-Up Response
Output
(500mV/div)
Voltage
Inductor
(200mA/div)
Current
Time (100 µ s/div)
(5V/Div)
Load Current
Step
Load Current
Step
Start-Up Response
Time (200 µ s/div)
Output
(500mV/div)
Voltage
Inductor
(500mA/div)
Current
Voltage at
Enable Pin
(5V/Div)
V
OUT
= 1.2V
V
OUT
= 1.2V
I
OUT
= 10mA
V
OUT
= 1.2V
I
OUT
= 1000mA