DS6257A Datasheet, PDF (7/15 Pages) Richtek Technology Corporation – 6A, 18V, 500kHz, ACOTTM Step-Down Converter

Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency vs. Output Current
VIN = 4.5V
VIN = 12V
VIN = 18V
VOUT = 1V,
L = 1.2μH (744325120)
0.01
0.1
1
10
Output Current (A)
Efficiency vs. Output Current
100
90
VIN = 8.5V
VIN = 12V
VIN = 18V
80
70
60
0.001
VOUT = 5V,
L = 3.3μH (74437368033)
0.01
0.1
1
10
Output Current (A)
UVLO Threshold vs. Temperature
4.2
4.1
Rising
4.0
3.9
3.8
3.7
Falling
3.6
3.5
3.4
-50 -25
VOUT = 1V, IOUT = 1A
0
25
50 75
Temperature (°C)
100 125
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS6257A/B-00 September 2016
RT6257A/B
Output Voltage vs. Output Current
1.100
1.075
1.050
1.025
1.000
0.975
VIN = 18V
VIN = 12V
VIN = 4.5V
0.950
VOUT = 1V
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Output Current (A)
Output Voltage vs. Output Current
5.3
5.2
5.1
VIN = 18V
VIN = 12V
VIN = 8.5V
5.0
VOUT = 5V
4.9
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Output Current (A)
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-50
EN Threshold vs. Temperature
EN_H
EN_L
VOUT = 1V, IOUT = 0A
-25
0
25
50 75 100 125
Temperature (°C)
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