PM6685
Electrical characteristics
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min Typ Max Unit
Current limit and zero crossing comparator
ICSENSE
Input bias current limit
Comparator offset
VCSENSE-VPGND
Zero crossing comparator offset VPGND-VPHASE
Fixed negative current limit
threshold
VPGND-VPHASE
90
100
110
µA
-6
6
mV
-1
11
mV
-120
mV
On time pulse width
Ton
ON-time duration
OUT5=5V
FSEL to GND
OUT3=3.3V
1685
780
1985
920
2285
1060
FSEL to
VREF
OUT5=5V
1115 1315 1515
ns
OUT3=3.3V
585
690
795
FSEL to
LDO5
OUT5=5V
830 980 1130
OUT3=3.3V
470
555
640
OFF time
TOFFMIN Minimum off time
Voltage reference
400
500
ns
VREF
Voltage accuracy
Load regulation
Undervoltage lockout fault
threshold
4.2V<VLDO5< 5.5V
-100µA< IREF < 100µA
Falling edge of REF
1.224 1.237 1.249
V
-4
4
mV
0.95
V
Integrator
COMP
Over voltage clamp
Under voltage clamp
Normal mode
Pulse skip mode
250
60
mV
-150
Line regulation
Both SMPS, 6V<Vin<28V(1)
0.004
%/V
LDO5 linear regulator
VLDO5
LDO5 linear output voltage
LDO5 line regulation
6V<VIN<28V, 0<ILDO5<50mA
4.9
6V< VIN < 28V, ILDO5 =50mA ,
LDO3_SEL tied to GND
5.0
5.1
V
0.004 %/V
ILDO5
UVLO
LDO5 current limit
Under voltage lockout of LDO5
VLDO5 > UVLO, ILDO3=0A
VOUT5>5.1V, VOUT3>3.34V
270
350
400
mA
3.94
4
4.13
V
11/52