DS6550A Datasheet, PDF (8/16 Pages) Richtek Technology Corporation – Synchronous DC-DC Step-Down Controller with 5V LDO

RT6550A
Typical Operating Characteristics
100
95
90
85
80
75
70
65
60
0
Efficiency vs. Output current
VIN = 7.4V
VIN = 11.1V
VIN = 14.8V
VIN = 20.5V
VEN = 1/4 VIN
123456789
Output current (A)
Switching Frequency vs. Input Voltage
500
400
300
200
100
0
5
VEN = 1/4 VIN
IOUT = 6A
9
13
17
21
25
Input Voltage (V)
5.030
V_LDO5 vs. I_LDO5
5.025
5.020
5.015
5.010
5.005
VEN = 1/4 VIN,
VIN = 12V
5.000
0
20
40
60
80
100
I_LDO5 (mA)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
8
Switching Frequency vs. Output Current
450
400
350
VIN = 19V
300 _{VIN = 11.1V}
250
VIN = 7.4V
200
150
100
50
0
0.001
VEN = 1/4 VIN
0.01
0.1
1
10
Output current (A)
Output Voltage vs. Output Current
5.02
5.01
5.00
4.99
4.98
VIN = 20.5V
VIN = 14.8V
VIN = 11.1V
VIN = 7.4V
4.97
4.96
0.001
VEN = 1/4 VIN
0.01
0.1
1
10
Output Current (A)
Quiescent Current vs. Input Voltage
300
290
280
270
260
250
240
230
220
210
200
5
VEN = 1/4 VIN,
VFB = 2.2V,
No Switching
9
13
17
21
25
Input Voltage (V)
is a registered trademark of Richtek Technology Corporation.
DS6550A-00 September 2016