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