NCP3155B ONSEMI [ON Semiconductor], NCP3155B Datasheet - Page 21

• Manufacturer Part Number: NCP3155B
• Description: 3 A Synchronous Buck Regulator
• Manufacturer: ONSEMI [ON Semiconductor]

Output Current Derating
capability. It also operates in a variety of thermal
environments. These thermal conditions limit the maximum
output current for a given input and output voltage.
Therefore, proper output current derating must be
considered, taking into account ambient temperature,
airflow, the input and output conditions, and the need for
increased reliability. Figures 24 − 29 show safe operating
conditions vs. output current for input voltages of 12 V,
18 V, and 24 V. These curves assumed 300 mm
copper. Sufficient cooling could also be provided to ensure
reliable operation. Finally, to maintain operation in the safe
operating areas shown in the curves, it is recommended to
use the NCP3155 with input to output conditions as shown
in Figure 44.
The NCP3155 has a wide input voltage and output voltage
2
of 2 oz
http://onsemi.com
21
14
12
10
8
6
4
2
0
4
Figure 44. Recommended Maximum Output
6
8
Voltage vs Input Voltage
10
V
IN
, INPUT VOLTAGE (V)
12
14
16
18
20
22
24