NCP3127AGEVB ON Semiconductor, NCP3127AGEVB Datasheet - Page 15

• Manufacturer Part Number: NCP3127AGEVB
• Description: BOARD EVAL NCP3127
• Manufacturer: ON Semiconductor

Specifications of NCP3127AGEVB

• Design Resources: NCP3127AGEVB Schematic
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: -
• Voltage - Output: Adj down to 0.8V
• Current - Output: 2A
• Voltage - Input: 4.5 ~ 13.2 V
• Regulator Topology: Buck
• Frequency - Switching: 350kHz
• Board Type: Fully Populated
• Utilized Ic / Part: NCP3127A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

R
R
V
V
associated standard R
Table 5. OUTPUT VOLTAGE SETTINGS
1
2
OUT
REF
The most frequently used output voltages and their
V
O
0.8
1.0
1.1
1.2
1.5
1.8
2.5
3.3
5.0
(V)
R
2
= Top resistor divider
= Bottom resistor divider
= Output voltage
= Regulator reference voltage
+ R
1
1
and R
@
R
1
2.55
3.83
4.99
12.7
21.5
31.6
52.3
1.0
V
10
(kW)
2
OUT
values are listed in Table 5.
V
REF
* V
REF
R
Open
2
10.2
11.5
10.2
10
10
10
10
10
(kW)
(eq. 39)
http://onsemi.com
15
Transconductance Error Amplifier can be calculated using
the method described below. The method serves to provide
a good starting place for compensation of a power supply.
The values can be adjusted in real time using the
compensation tool comp calc, available for download at
ON Semiconductor’s website.
least 2X the value of R
noise. Using the 2X assumption, R
the feed through capacitor can be calculated as shown
below:
The compensation components for the Pseudo Type III
The value of the feed through resistor should always be at
2
to minimize error from feed through
F
will be set to 20 kW and