RT8269 RICHTEK [Richtek Technology Corporation], RT8269 Datasheet - Page 6

• Manufacturer Part Number: RT8269
• Description: 3A, 24V, 400kHz Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT8269
www.richtek.com
6
(10mV/Div)
(10V/Div)
(1A/Div)
(5V/Div)
(2V/Div)
V
(2A/Div)
V
OUT
V
V
I
OUT
SW
IN
EN
I
6.0
5.5
5.0
4.5
4.0
3.5
3.0
L
0
V
IN
Current Limit vs. Duty Cycle
= 4.75V to 24V, V
20
Power On from EN
Output Ripple
Time (5ms/Div)
V
V
Time (1μs/Div)
Duty Cycle (%)
40
IN
IN
OUT
= 12V, V
= 12V, V
= 3.3V
60
OUT
OUT
= 3.3V, I
= 3.3V, I
80
OUT
OUT
= 3A
= 3A
100
(5V/Div)
(2V/Div)
(1A/Div)
(5V/Div)
(2V/Div)
(1A/Div)
V
V
V
V
I
I
OUT
OUT
IN
IN
EN
IN
6.0
5.5
5.0
4.5
4.0
3.5
3.0
-50
Current Limit vs. Temperature
-25
Power On from VIN
Power Off from EN
0
Temperature (°C)
Time (5ms/Div)
V
Time (5ms/Div)
V
IN
IN
25
= 12V, V
= 12V, V
DS8269-02 March 2011
V
50
IN
OUT
OUT
= 12V, V
= 3.3V, I
= 3.3V, I
75
OUT
OUT
OUT
100
= 3.3V
= 3A
= 3A
125