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PM6685 bảng dữ liệu(PDF) 11 Page - STMicroelectronics

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



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