RT8253A RICHTEK [Richtek Technology Corporation], RT8253A Datasheet - Page 7

• Manufacturer Part Number: RT8253A
• Description: 3A, 23V, 340kHz Synchronous Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

(200mV/Div)
DS8253A-02 March 2011
(10mV/Div)
(10V/Div)
V
V
(2A/Div)
(2A/Div)
OUT
V
I
OUT
LOAD
SW
I
L
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
0
V
15
IN
Current Limit vs. Duty Cycle
Load Transient Response
= 12V, V
Switching Waveform
30
V
I
OUT
Time (100μs/Div)
IN
Duty Cycle (%)
OUT
Time (1μs/Div)
= 12V, V
= 0A to 3A
45
= 3.3V, V
V
V
IN
OUT
OUT
60
= 4.5V to 23V,
EN
= 3.3V, V
= 3.3V, V
= V
75
IN
, I
EN
EN
OUT
90
= V
= V
= 3A
IN
IN
105
,
(200mV/Div)
(10mV/Div)
(10V/Div)
V
V
(2A/Div)
(2A/Div)
OUT
OUT
V
I
LOAD
SW
I
8.00
7.75
7.50
7.25
7.00
6.75
6.50
6.25
6.00
5.75
5.50
5.25
5.00
4.75
4.50
4.25
4.00
L
-50
V
IN
Current Limit vs. Temperature
-25
= 12V, V
Load Transient Response
Switching Waveform
0
V
OUT
V
I
Temperature ( ° C)
OUT
Time (100μs/Div)
IN
IN
Time (1μs/Div)
= 12V, V
= 12V, V
= 3.3V, V
= 1.5A to 3A
25
OUT
OUT
RT8253A
50
EN
= 3.3V, V
= V
= 3.3V, V
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IN
75
, I
OUT
EN
EN
100
= 1.5A
= V
= V
IN
IN
125
,
7