NCP3163PWG ON Semiconductor, NCP3163PWG Datasheet - Page 10

• Manufacturer Part Number: NCP3163PWG
• Description: IC REG SW DC/DC 3.4A 16SOIC
• Manufacturer: ON Semiconductor
• Type: Step-Down (Buck), Step-Up (Boost), Invertingr

Specifications of NCP3163PWG

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 40V
• Current - Output: 3.4A
• Frequency - Switching: 50kHz ~ 300kHz
• Voltage - Input: 2.5 ~ 40 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (7.5mm Width) Exposed Pad, 16-eSOIC, 16-HSOIC
• Output Voltage: 1 V to 40 V
• Output Current: 3.4 A
• Input Voltage: 2.5 V to 40 V
• Switching Frequency: 50 KHz to 1 MHz
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

applications (see application notes at the end of this
document) the inductor will forward bias the output rectifier
when the switch turns off. Rectifiers with a high forward
voltage drop or long turn−on delay time should not be used.
If the emitter is allowed to go sufficiently negative, collector
current will flow, causing additional device heating and
reduced conversion efficiency.
collector current will be in the range 10 mA over
temperature. A 1N5822 or equivalent Schottky barrier
rectifier is recommended to fulfill these requirements.
saturation voltage in step−down and voltage−inverting
converter applications. This input is connected through a
series resistor and capacitor to the switch emitter and is used
to raise the internal 2.0 mA bias current source above V
An internal zener limits the bootstrap input voltage to V
+7.0 V. The capacitor’s equivalent series resistance must
limit the zener current to less than 100 mA. An additional
series resistor may be required when using tantalum or other
of the NCP3163. Three main converter topologies are
demonstrated with actual test data shown below each of the
circuit diagrams. Figure 22 gives the relevant design
When configured for step−down or voltage−inverting
Figure 12 shows that by clamping the emitter to 0.5 V, the
A bootstrap input is provided to reduce the output switch
Figures 23 through 30 show the simplicity and flexibility
Vias to 2nd Layer Metal
for Maximum Heat Sinking
Figure 21. Layout Guidelines to Obtain Maximum
Flare Metal for Maximum Heat Sinking
Package Power Dissipation
http://onsemi.com
0.175
APPLICATIONS
CC
CC
.
0.145
10
low ESR capacitors. The equation below is used to calculate
a minimum value bootstrap capacitor based on a minimum
zener voltage and an upper limit current source.
a supply voltage range of 2.5 V to 40 V. When operating
below 3.0 V, the Bootstrap Input should be connected to
V
1.7 V at room temperature is possible.
Package
plastic package in which the die is mounted on a special heat
tab copper alloy pad. This pad is designed to be soldered
directly to a GND connection on the printed circuit board to
improve thermal conduction. Since this pad directly
contacts the substrate of the die, it is important that this pad
be always soldered to GND, even if surface mount heat
sinking is not being used. Figure 21 shows recommended
layout techniques for this package.
equations for the key parameters. Additionally, a complete
application design aid for the NCP3163 can be found at
www.onsemi.com.
CC
Parametric operation of the NCP3163 is guaranteed over
The NCP3163 is contained in a heatsinkable 16−lead
. Figure 18 shows that functional operation down to
C B(min) + I Dt
0.188
Exposed Pad
DV
Minimum
Recommended
Exposed Copper
+ 4.0 mA
4.0 V
t on
+ 0.001 t on