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NCP5214A Datasheet(PDF) 4 Page - ON Semiconductor

Part No. NCP5214A
Description  2−in−1 Notebook DDR Power Controller
Download  31 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP5214A Datasheet(HTML) 4 Page - ON Semiconductor

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NCP5214A
http://onsemi.com
4
PIN FUNCTION DESCRIPTION
Pin
Symbol
Description
1
VDDQEN
VDDQ regulator enable input. High to enable.
2
VTTEN
VTT regulator enable input. High to enable.
3
FPWM
Forced PWM enable input. Low to enable forced PWM mode and disable power−saving mode.
4
SS
VDDQ Soft−start capacitor connection to ground.
5
VTTGND
Power ground for the VTT regulator.
6
VTT
VTT regulator output.
7
VTTI
Power input for VTT regulator which is normally connected to the VDDQ output of the buck regulator.
8
FBVTT
VTT regulator feedback pin for closed loop regulation.
9
AGND
Analog ground connection and remote ground sense.
10
DDQREF
External reference input which is used to regulate VTT and VTTREF to 1/2VDDQREF.
11
VCCA
5.0 V supply input for the IC’s control and logic section, which is monitored by undervoltage lock out
circuitry.
12
COMP
VDDQ error amplifier compensation node.
13
FBDDQ
VDDQ regulator feedback pin for closed loop regulation.
14
VTTREF
DDR reference voltage output.
15
PGOOD
Power good signal open−drain output.
16
OCDDQ
Overcurrent sense and program input for the high−side FET of VDDQ regulator. Also the battery voltage
input for the internal ramp generator to implement the voltage feedforward rejection to the input voltage
variation. This pin must be connected to the VIN through a resistor to perform the current limit and volt-
age feedforward functions.
17
BOOST
Positive supply input for high−side gate driver of VDDQ regulator and boost capacitor connection.
18
TGDDQ
Gate driver output for VDDQ regulator high−side N−Channel power FET.
19
SWDDQ
VDDQ regulator inductor driven node, return for high−side gate driver, and current limit sense input.
20
VCCP
Power supply for the VDDQ regulator low−side gate driver and also supply voltage for the bootstrap
capacitor of the VDDQ regulator high−side gate driver supply.
21
BGDDQ
Gate driver output for VDDQ regulator low−side N−Channel power FET.
22
PGND
Power ground for the VDDQ regulator.
23
THPAD
Copper pad on bottom of IC used for heatsinking. This pin should be connected to the ground plane un-
der the IC.


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