NCP3012 Ver la hoja de datos (PDF) - ON Semiconductor
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NCP3012 Datasheet PDF : 26 Pages
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NCP3012
ELECTRICAL CHARACTERISTICS (−40°C < TJ < +125°C, VCC = 12 V, for min/max values unless otherwise noted)
Characteristic
Conditions
Min
Typ
Max
Unit
Input Voltage Range
−
4.7
28
V
SUPPLY CURRENT
Quiescent Supply Current
VCC Supply Current
VCC Supply Current
UNDER VOLTAGE LOCKOUT
EN = 0 VCC = 12 V
VFB = 0.75 V, Switching, VCC = 4.7 V
VFB = 0.75 V, Switching, VCC = 28 V
−
2.5
4.0
mA
−
5.8
8.0
mA
−
6.0
12
mA
UVLO Rising Threshold
UVLO Falling Threshold
OSCILLATOR
VCC Rising Edge
VCC Falling Edge
3.8
4.3
4.7
V
3.5
4.0
4.3
V
Oscillator Frequency
Ramp−Amplitude Voltage
Ramp Valley Voltage
TJ = +25°C, 4.7 V v VCC v 28 V
65
75
85
kHz
TJ = −40°C to +125°C, 4.7 V v VCC v 28 V
62
75
88
kHz
Vpeak − Valley
−
1.5
−
V
0.44
0.8
0.96
V
PWM
Minimum Duty Cycle
−
7
−
%
Maximum Duty Cycle
82
86
−
%
Soft Start Ramp Time
EXTERNAL VOLTAGE REFERENCE
VFB = VCOMP
−
14
−
ms
VREF Voltage
VREF Line Regulation
VREF Load Regulation
Short Circuit Output Current
ENABLE
IREF = 1 mA
VCC = 4.7 V − 28 V
IREF = 0 mA to 1.5 mA
VREF = 0 V
1.14
1.25
1.35
V
−1
−
+1
%
−2
−0.2
+2
%
4.5
5.7
7.0
mA
Enable Threshold High
−
−
3.4
V
Enable Threshold Low
1.0
−
−
V
Enable Source Current
20
50
90
mA
POWER GOOD
Power Good High Threshold
Power Good Low Threshold
Power Good Low Voltage
SYNC
VCC = 12 V
VCC = 12 V
VCC = 12 V, IPG = 4 mA
0.72
0.89
1.06
V
0.65
0.71
0.75
V
0.13
0.22
0.35
V
SYNC Input High Threshold
−
−
2.0
V
SYNC Output High
10 mA load
−
5.0
−
V
SYNC Output Low
−
90
−
mV
Phase Delay
(Note 4)
−
200
−
°
SYNC Drive Current (Sourcing)
−
1.6
−
mA
Master Threshold Current
5.0
14.4
25
mA
Master Frequency
70
85
100
kHz
4. Guaranteed by design.
5. The voltage sensed across the high side MOSFET during conduction.
6. This assumes 100 pF capacitance to ground on the COMP Pin and a typical internal Ro of > 10 MW.
7. This is not a protection feature.
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