RT6543A/B
Parameter
Reference and Soft-Start
VID[1:0] = 11
Output Voltage Scaling
VID[1:0] = 10
VID[1:0] = 01
VID[1:0] = 00
Dynamic Voltage Scale
Slew Rate
Current Limit
Current Limit
Current Limit Setting
Range
I
LIM
V
CS
Voltage of pin CS_DIS
GND
PHASE
= VCS / 12
0.5V
VCS
2.8V
GND
PHASE
= VCS / 12
0.4V
VCS
0.5V
5.4
0.4
15
7
--
6
--
VCS / 12
VCS / 12
4700
6.6
2.8
+15
+7
--
A
V
%
mV
ppm/C
SR
DVS
1.782
1.6335
1.089
0.01
12
1.8
1.65
1.1
0
--
1.818
1.666
1.111
0.01
60
mV/s
V
Symbol
Test Conditions
Min
Typ
Max
Unit
Current Limit Voltage
V
_PHASW_OC
Current Limit Temperature
Coefficient
Switching Frequency and Minimum Off Timer
FSWSEL = 5V
Switching Frequency
f
SW
FSWSEL = HIZ
FSWSEL = 0V
Switching Frequency
Programmable Step
Switching Frequency
Accuracy
Minimum Off-Time
Protections
OVP Trip Threshold
OVP Propagation Delay
UVP Trip Threshold
UVP Propagation Delay
Zero Current Crossing
Threshold
V
OVP
T
DELAY_OVP
V
UVP
t
DELAY_UVP
V
PH_ZC
UVP detect
OVP detect
f
SW
t
OFF_MIN
FSWSEL = HIZ
--
--
--
--
0.51
--
0.8
0.6
0.4
200
0.6
130
--
--
--
--
0.69
--
KHz
MHz
ns
MHz
--
--
--
--
4
2.2
5
60
5
--
--
--
--
--
4
V
s
%
s
mV
Copyright
©
2020 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6543A/B-01 March 2020
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
