
NCV8855
ELECTRICAL CHARACTERISTICS (V IN_SW = V IN = V ISNS1+ = V ISNS1 ? = V ISNS2+ = V ISNS2 ? = 13.2 V, SYS_EN = LDO_EN =
HS_EN = 5 V, VOUT3 = 3.3 V, VOUT4 = 8.5 V, IOUT[1:4] = 0 A) Min/Max values are valid for the temperature range ? 40 ° C v T J v
150 ° C unless noted otherwise. Min/Max values are guaranteed by test, design or statistical correlation.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
SUPPLY VOLTAGES AND SYSTEM SPECIFICATION
Thermal Monitoring (T MON_SW, SMPS2 internal MOSFET temperature monitor)
T WARN2 hysteresis
10
20
° C
Thermal shutdown temperature
Delta junction temperature
(TSD2 ? T WARN2 )
TSD2
160
10
170
20
180
30
° C
° C
HOT_FLG
Voltage low threshold
T J > TWARN[x], 1 k W pullup to 5 V
0.4
V
Leakage current
Sink capability
1 k W pull ? up to 5 V, T J = 25 ° C
V HOT_FLG = 0.8 V
4.6
100
500
nA
mA
System Enable
Logic high
Logic low
2.0
0.8
V
V
Pull down resistance
T J = 25 ° C
500
k W
High ? Side Enable
HS_EN logic high
HS_EN logic low
0.8
2.0
V
V
Pull down current
V HS_EN = 5 V
V HS_EN = 0.8 V
2
5
5
10
m A
Leakage current
I HS_EN
SYS_EN = 0 V, V HS_EN = 5 V
100
500
nA
LDO Enable
Logic high
Logic low
0.8
2.0
V
V
Pull down current
V LDO_EN = 5 V
V LDO_EN = 0.8 V
2
5
5
10
m A
Leakage current
I LDO_EN
SYS_EN = 0 V, V LDO_EN = 5 V
100
500
nA
SWITCH ? MODE POWER SUPPLY CONTROLLER (SMPS1, VOUT1) SPECIFICATIONS
Over Current Protection
OCSET current sink
R OCSET = 10 k W connected to 13.2 V
45
55
65
m A
OCSET leakage current
OCSET comparator differential range
OCSET comparator common ? mode
range
SYS_EN = 0 V, V OCSET = 13.2 V,
T J = 25 ° C
(Note 1)
(Note 1)
50
4.0
100
500
750
19
nA
mV
V
Current limit response time
From rising edge of SN1
100
200
275
ns
Short circuit threshold voltage
Short circuit protection startup delay
SCTH1
V SW_FB1 % of V REF
From SYS_EN rising edge, % of t SS1,
SW_FB1 = 0.5 V, (Note 2)
75
100
80
125
85
150
%
%
Internal Soft ? Start
Soft ? start time
t SS1
3
5
7
ms
1. Guaranteed by design, not fully tested in production.
2. Indirectly guaranteed by test coverage of other parameters.
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