RT7272B Datasheet, PDF (8/15 Pages) Richtek Technology Corporation – 3A, 36V, 500kHz Synchronous Step-Down Converter

RT7272B
Switching Frequency vs. Temperature
500
490
480
470
460
450
440
-50 -25
VIN = 4.5V
VIN = 12V
VIN = 24V
VIN = 36V
VOUT = 3.3V, IOUT = 0.3A
0
25 50 75
Temperature (°C)
100 125
Load Transient Response
Current Limit vs. Temperature
8
7
6
5
4
3
2
-50 -25
VIN = 12V
0
25 50 75
Temperature (°C)
100 125
Load Transient Response
VOUT
(200mV/Div)
VOUT
(200mV/Div)
IOUT
(2A/Div)
VOUT
(5mV/Div)
VIN = 12V, VOUT = 3.3V, IOUT = 0.3A to 3A
Time (250μs/Div)
IOUT
(2A/Div)
Switching
VOUT
(5mV/Div)
VIN = 12V, VOUT = 3.3V, IOUT = 1.5A to 3A
Time (250μs/Div)
Switching
VSW
(5V/Div)
IL
(1A/Div)
VIN = 12V, VOUT = 3.3V, IOUT = 1.5A
Time (1μs/Div)
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
8
VSW
(5V/Div)
IL
(2A/Div)
VIN = 12V, VOUT = 3.3V, IOUT = 3A
Time (1μs/Div)
is a registered trademark of Richtek Technology Corporation.
DS7272B-01 January 2013