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NCP5269 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. NCP5269
Description  Synchronous Buck Controller with Auto Power Controller with Auto Power Inputs for System Agent
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP5269 Datasheet(HTML) 3 Page - ON Semiconductor

 
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NCP5269
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Table 1. PIN DESCRIPTIONS
Pin
No.
Symbol
Description
1
EN
Logic control for enabling the switcher. Applying greater than 1.4 V will turn on the part. Connect to GND to
disable.
2
VCC
Supply for analog circuit.
3
VID1
Logic input for reference voltage selector. Use in conjunction with the VID0 pin to select among four set−point
reference voltages.
4
VID0
Logic input for reference voltage selector. Use in conjunction with the VID1 pin to select among four set−point
reference voltages.
5
V3
Voltage set−point programming resistor input.
6
V2
Voltage set−point programming resistor input.
7
V1
Voltage set−point programming resistor input. External reference input when enabled by connecting the V3 pin
to the VCC pin.
8
VREF
Soft−start programming capacitor input. Set-point reference voltage programming resistor input. Connects
internally to the inverting input of the VSET voltage set-point amplifier.
9
PG
Power good indicator of the output voltage. Open−drain output.
10
PGND
Ground reference and high−current return path for the bottom gate driver.
11
GL/FSET
Gate driver output of bottom N−channel MOSFET. And it is also used to set up switching frequency by
connecting a resistor from this pin to ground.
12
VCCP
Power supply for MOSFET gate drive
13
SWN
Switch node between the top MOSFET and bottom MOSFET.
14
GH
Gate driver output of the top N−channel MOSFET.
15
BST
Top gate driver input supply, a bootstrap capacitor connection between SWN and this pin.
16
CSP
Inductor current differential sense non−inverting input.
17
CSN
Inductor current differential sense inverting input.
18
FBRTN
Feedback Return Input/Output. This pin remotely senses the output voltage. It is also used as the ground
return for the VID reference voltage and the voltage error amplifier blocks.
19
FB
Output voltage feed back.
20
COMP
Output of the error amplifier.
AGND
Analog ground. Bottom thermal pad.


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