ncp1540 ON Semiconductor, ncp1540 Datasheet - Page 4

• Manufacturer Part Number: ncp1540
• Description: 3.5 A High Efficiency Step-down Dc-dc Converter
• Manufacturer: ON Semiconductor

6. Power dissipation limits must be observed.
7. Guaranteed by design.
ELECTRICAL CHARACTERISTICS
(V
Recommended Operating Conditions
Supply Current
Under Voltage Lockout
Switching Regulator
Error Amplifier (GM)
Soft-Start
Enable
Thermal Shutdown
Input Voltage Range
Bootstrap Voltage Range
Quiescent Supply Current
Boost Quiescent Current
Shutdown Supply Current
UVLO Threshold
UVLO Hysteresis
Feedback Voltage
Oscillator Frequency
Comp Pin Operating Voltage Range
Minimum Duty Cycle
Maximum Duty Cycle
High Side MOSFET R
High Side Leakage Current
Low Side MOSFET R
Low Side Leakage Current
Low Side MOSFET On Time
Current Limit Set Point
Current Loop Transient Response
Transconductance
DC Gain
Unity Gain Bandwidth
Output Sink Current
Output Source Current
FB Bias Current
Soft-Start Period
Soft-Start Source Current
Enable Threshold (Rising)
Enable Threshold (Falling)
Enable Hysteresis
Enable Pin Input Current
Overtemperature Shutdown Trip Point
CC
= 12V, -40°C < T
Characteristic
DS(on
DS(on)
J
< 125°C (Note 6) for min/max values, T
)
V FB = 1.4 V, No Switching, V(BST-LX) = 12 V
V EN = 2.6 V, V
Temperature rising (Note 7)
V
V
V
V
FB
FB
EN
V
FB
V
T
-40°C < T
V
CC
= 1.4 V, V
= 1.0 V, V
J
EN
= 0 V, V
CC
< 1.2 V, C
V
V
=12 V, I
= -40°C to 125°C
Conditions
COMP
COMP
=12 V, I
V
http://onsemi.com
= 0 V, V
VLX = V
V
V
T
FB
EN
CC
(Note 7)
(Note 7)
(Note 7)
(Note 7)
EN
J
J
= 25°C
= 1.4 V, No Switching
= 0.3 V
NCP1540
Rising
LX
= 25°C for typical values, unless otherwise noted).
= 0 V
J
= 0.8 V
= 2.1 V
LX
COMP
COMP
SS
< 125°C
LX
LX
= V
CC
= -0.1 A
= 0.1 mF
4
= 1 A
= 0 V
CC
= 2.0 V
= 1.0 V
-1 V
VCC + 3.5
1.176
1.164
TBD
TBD
3.85
0.85
Min
308
200
4.5
1.0
4.5
8.5
0.6
0.3
85
60
Typ
140
500
385
300
100
100
100
160
110
2.0
4.2
1.2
1.2
6.0
5.0
1.0
4.0
0.1
0.7
0.5
0.2
1.0
20
65
10
10
0
1.224
1.236
TBD
TBD
TBD
Max
1.15
11.5
460
190
400
3.0
4.4
2.9
5.5
1.0
0.7
28
40
30
10
10
70
10
1
mmho
nsec
MHz
Unit
kHz
mW
mA
mV
ms
mA
mA
mA
mA
dB
mA
mA
mA
mA
mA
°C
ns
%
%
V
V
V
V
V
W
A
V
V
V