RT2862
Current Limit vs. Temperature
8
7
1200
1100
Frequency vs. R
T
Inductor Current (A)
1000
Frequency (kHz)1
6
5
4
3
2
-50
-25
0
25
50
75
100
125
900
800
700
600
500
400
300
200
50
65
80
95
110 125 140 155 170 185 200
V
IN
=
V
IN
=
V
IN
=
V
IN
=
36V
24V
12V
4.5V
V
IN
= 12V, I
OUT
= 0A
Temperature (°C)
R
T
(k
Ω
)
Load Transient Response
Load Transient Response
V
OUT
(200mV/Div)
V
OUT
(200mV/Div)
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V,
I
OUT
= 3A to 1.5A, R
T
= 113k
I
OUT
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V,
I
OUT
= 0A to 3A, R
T
= 113k
Time (100µs/Div)
Time (100µs/Div)
Switching
V
OUT
(5mV/Div)
V
OUT
(5mV/Div)
Switching
V
SW
(5V/Div)
I
L
(1A/Div)
V
SW
(5V/Div)
I
L
(2A/Div)
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 1.5A, R
T
= 113k
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 3A, R
T
= 113k
Time (1µs/Div)
Time (1µs/Div)
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS2862-02 January 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
