ncp3127 ON Semiconductor, ncp3127 Datasheet - Page 4

• Manufacturer Part Number: ncp3127
• Description: Ncp3127 2 A Synchronous Pwm Switching Converter
• Manufacturer: ON Semiconductor

5. Guaranteed by design.
SUPPLY CURRENT
UNDER VOLTAGE LOCKOUT
SWITCHING REGULATOR
PWM COMPENSATION
ENABLE
SOFT−START
OVER−CURRENT PROTECTION
PWM OUTPUT STAGE
Table 3. ELECTRICAL CHARACTERISTICS
min/max values unless otherwise noted.)
Input Voltage Range
Boost Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Boost Quiescent Current
V
V
VFB Feedback Voltage,
Control Loop in Regulation
Oscillator Frequency
Ramp−Amplitude Voltage
Minimum Duty Ratio
Maximum Duty Ratio
Transconductance
Open Loop DC Gain
Output Source Current
Output Sink Current
Input Bias Current
Enable Threshold
SS Source Current
Switch Over Threshold
OCSET Current Source
OC Switch−Over Threshold
Fixed OC Threshold
High−Side Switch On−Resistance
Low−Side Switch On−Resistance
Delay to Soft−Start
IN
IN
UVLO Threshold
UVLO Hysteresis
Characteristic
−40°C v T
−40°C v T
V
V
(−40°C < T
FB
FB
T
T
Sourced from ISET pin, before SS
J
J
= 1.0 V, No Switching, V
= 1.0 V, No Switching, V
= 0 to 25°C, 4.5 V < V
= 0 to 25°C, 4.5 V < V
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J
J
V
V
v 125°C, 4.5 v V
v 125°C, 4.5 v V
V
V
IN
IN
V
IN
IN
J
IN
V
Conditions
< 125°C; V
V
V
V
V
= 12 V (Note 5)
= 12 V (Note 5)
V
= 5 V (Note 5)
= 5 V (Note 5)
BST
FB
FB
FB
FB
Rising Edge
IN
4
− GND
< 0.8 V
> 0.8 V
< 0.8 V
= 0.8 V
− GND
−
IN
CC
CC
= 12 V, BST−VSW = 12 V, BST = 12 V, V
IN
IN
CC
CC
< 13.2 V
< 13.2 V
= 13.2 V
= 13.2 V
v 13.2 V
v 13.2 V
0.792
0.784
Min
300
290
4.5
4.5
1.0
0.1
3.8
0.8
3.0
0.3
3.0
70
55
80
80
−
−
−
−
−
−
−
−
−
0.800
0.800
0.16
10.5
Typ
430
350
350
125
125
100
700
375
105
105
4.0
1.1
5.5
0.4
75
70
10
80
80
−
−
−
−
−
SW
0.808
0.816
Max
13.2
26.5
10.0
400
410
200
200
140
175
140
175
1.0
4.3
1.4
1.0
0.5
80
15
−
−
−
5
−
−
−
−
−
= 24 V, for
% of Vref
Unit
kHz
mW
mW
mA
mA
mA
mV
mV
mV
mV
ms
ms
dB
mA
mA
mA
mA
%
%
V
V
V
V
V