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NCP1400A Datasheet PDF : 16 Pages
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NCP1400A
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage (Pin 2)
VOUT
−0.3 to 6.0
V
Input/Output Pins
LX (Pin 5)
LX Peak Sink Current
VLX
−0.3 to 6.0
V
ILX
400
mA
CE (Pin 1)
Input Voltage Range
Input Current Range
VCE
−0.3 to 6.0
V
ICE
−150 to 150
mA
Thermal Resistance Junction to Air
RqJA
250
°C/W
Operating Ambient Temperature Range (Note 2)
TA
−40 to +85
°C
Operating Junction Temperature Range
TJ
−40 to +125
°C
Storage Temperature Range
Tstg
−55 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) $2.0 kV per JEDEC standard: JESD22−A114.
Machine Model (MM) $200 V per JEDEC standard: JESD22−A115.
2. The maximum package power dissipation limit must not be exceeded.
PD
+
TJ(max) *
RqJA
TA
3. Latchup Current Maximum Rating: $150 mA per JEDEC standard: JESD78.
4. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
ELECTRICAL CHARACTERISTICS (For all values TA = 25°C, unless otherwise noted.)
Characteristic
Symbol
Min
OSCILLATOR
Frequency (VOUT = VSET x 0.96, Note 5)
fOSC
144
Frequency Temperature Coefficient (TA = −40°C to 85°C)
Df
−
Maximum PWM Duty Cycle (VOUT = VSET x 0.96)
DMAX
68
Minimum Startup Voltage (IO = 0 mA)
Vstart
−
Minimum Startup Voltage Temperature Coefficient (TA = −40°C to 85°C)
DVstart
−
Minimum Operation Hold Voltage (IO = 0 mA)
Vhold
0.3
Soft−Start Time (VOUT u 0.8 V)
tSS
0.5
LX (PIN 5)
LX Pin On−State Sink Current (VLX = 0.4 V)
Device Suffix:
19T1
22T1
25T1
27T1
30T1
33T1
38T1
45T1
50T1
ILX
80
80
80
100
100
100
100
100
100
Voltage Limit (VOUT = VCE = VSET x 0.96, VLX “L’’ Side)
Off−State Leakage Current (VLX = 5.0 V, TA = −40°C to 85°C)
5. VSET means setting of output voltage.
6. CE pin is integrated with an internal 150 nA pullup current source.
VLXLIM
ILKG
0.65
−
Typ
180
0.11
75
0.8
−1.6
−
2.0
90
90
120
125
130
135
145
155
160
0.8
0.5
Max
Unit
216
kHz
−
%/°C
82
%
0.95
V
−
mV/°C
−
V
−
ms
mA
−
−
−
−
−
−
−
−
−
1.0
V
1.0
mA
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