ncp1587a ON Semiconductor, ncp1587a Datasheet - Page 4

• Manufacturer Part Number: ncp1587a
• Description: Low Voltage Synchronous Buck Controller
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
0 V < PHASE < 21 V, C
Supply Current
Under Voltage Lockout
Switching Regulator
Error Amplifier (GM)
Soft−Start
Gate Drivers
Over−Current Protection
Input Voltage Range
Boost Voltage Range
Quiescent Supply Current
Boost Quiescent Current
UVLO Threshold
UVLO Hysteresis
VFB Feedback Voltage,
Control Loop in Regulation
Oscillator Frequency
Ramp−Amplitude Voltage
Minimum Duty Cycle
Maximum Duty Cycle
Transconductance
Open Loop DC Gain
Output Source Current
Output Sink Current
Input Bias Current
SS Source Current
Switch Over Threshold
Upper Gate Source
Upper Gate Sink
Lower Gate Source
Lower Gate Sink
TG Falling to BG Rising Delay
BG Falling to TG Rising Delay
Enable Threshold
OCSET Current Source
OC Switch−Over Threshold
Fixed OC Threshold
Characteristic
TG
= C
NCP1587A
NCP1587
BG
= 1.0 nF, for min/max values unless otherwise noted.)
V
V
(0_C < T
FB
FB
V
V
CC
CC
Sourced from BG pin, before SS
V
= 1.0 V, No Switching, V
= 1.0 V, No Switching, V
CC
= 12 V, TG < 2.0 V, BG > 2.0 V
= 12 V, BG < 2.0 V, TG > 2.0 V
A
= 12 V, VTG = VBG = 2.0 V
< 70_C; 4.5 V < V
V
T
T
CC
Conditions
A
A
V
V
V
V
http://onsemi.com
FB
FB
FB
FB
= 0 to 70°C
= 0 to 70°C
Rising Edge
< 0.8 V
> 0.8 V
< 0.8 V
= 0.8 V
−
−
−
4
CC
CC
CC
< 13.2 V, 4.5 V < [BST−PHASE] < 13.2 V, 4.5 V < BST < 30 V,
= 13.2 V
= 13.2 V
Min
300
792
250
180
4.5
4.5
1.0
0.1
3.8
0.8
3.0
0.3
70
55
80
80
0
−
7
−
−
−
−
−
−
−
−
−
−
−375
Typ
370
800
275
200
120
120
100
700
1.1
0.1
1.0
1.0
1.0
2.0
0.4
75
70
40
35
10
−
−
−
−
−
−
−
−
Max
13.2
26.5
440
808
300
220
8.0
1.0
4.2
1.4
4.4
1.0
0.5
80
14
90
90
−
−
−
−
−
−
−
−
−
−
−
−
% of Vref
mmho
Unit
kHz
mA
mA
mV
mV
mV
mV
DB
mA
mA
mA
mA
ns
ns
%
%
V
V
V
V
A
A
A
A
V