DS6257A Datasheet, PDF (8/15 Pages) Richtek Technology Corporation – 6A, 18V, 500kHz, ACOTTM Step-Down Converter

RT6257A/B
Output Voltage vs. Temperature
1.06
1.04
1.02
1.00
0.98
0.96
-50
VIN = 18V
VIN = 12V
VIN = 4.5V
VOUT = 1V, IOUT = 1.5A
-25
0
25 50 75 100 125
Temperature (°C)
5.150
5.125
5.100
5.075
5.050
5.025
5.000
4.975
4.950
4.925
4.900
4.875
4.850
-50
Output Voltage vs. Temperature
VIN =12V
VIN = 18V
VIN = 8.5V
VOUT = 5V, IOUT = 1.8A
-25
0
25 50 75 100 125
Temperature (°C)
Load Transient Response
VIN = 12V, VOUT = 1V,
IOUT = 0A to 6A, L = 1.2μH
VOUT
(20mV/Div)
Output Ripple Voltage
VIN = 12V, VOUT = 1V,
IOUT = 6A, L = 1.2μH
VOUT
(20mV/Div)
IOUT
(2A/Div)
VOUT
(1V/Div)
VEN
(2V/Div)
VLX
(10V/Div)
IOUT
(5A/Div)
Time (100μs/Div)
Power On from EN
VIN = 12V, VOUT = 1V,
IOUT = 6A, L = 1.2μH
Time (5ms/Div)
VLX
(5V/Div)
VOUT
(1V/Div)
VEN
(2V/Div)
VLX
(10V/Div)
IOUT
(5A/Div)
Time (2μs/Div)
Power Off from EN
VIN = 12V, VOUT = 1V,
IOUT = 6A, L = 1.2μH
Time (200μs/Div)
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8
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DS6257A/B-00 September 2016