NCP5322A datasheet(1/32 Pages) ONSEMI

No de pièce	NCP5322A

Description	TWO-PHASE BUCK CONTROLLER WITH INTEGRATED GATE DRIVERS AND 5-BIT DAC

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Fabricant	ONSEMI [ON Semiconductor]

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 Semiconductor Components Industries, LLC, 2001

December, 2001 – Rev. 4

1

Publication Order Number:

NCP5322A/D

NCP5322A

Two-Phase Buck Controller

with Integrated Gate

Drivers and 5-Bit DAC

The NCP5322A is a second–generation, two–phase step down

controller which incorporates all control functions required to power

high performance processors and high current power supplies.

Proprietary multi–phase architecture guarantees balanced load current

distribution and reduces overall solution cost in high current

applications. Enhanced V2

 control architecture provides the fastest

possible transient response, excellent overall regulation, and ease of

use. The NCP5322A is a second–generation PWM controller because

it optimizes transient response by combining traditional Enhanced V2

with an internal PWM ramp and fast–feedback directly from VCORE to

the internal PWM comparator. These enhancements provide greater

design flexibility, facilitate use and reduce output voltage jitter.

The NCP5322A multi–phase architecture reduces output voltage

and input current ripple, allowing for a significant reduction in filter

size and inductor values with a corresponding increase in inductor

current slew rate. This approach allows a considerable reduction in

input and output capacitor requirements, as well as reducing overall

solution size and cost.

Features

• Enhanced V2 Control Method with Internal Ramp

• Internal PWM Ramp

• Fast–Feedback Directly from VCORE

• 5–Bit DAC with 1.0% Accuracy

• Adjustable Output Voltage Positioning

• 4 On–Board Gate Drivers

• 200 kHz to 800 kHz Operation Set by Resistor

• Current Sensed through Buck Inductors or Sense Resistors

• Hiccup Mode Current Limit

• Individual Current Limits for Each Phase

• On–Board Current Sense Amplifiers

• 3.3 V, 1.0 mA Reference Output

• 5.0 V and/or 12 V Operation

• On/Off Control (through Soft Start Pin)

• Power Good Output with Internal Delay

http://onsemi.com

Device

Package

Shipping

ORDERING INFORMATION

NCP5322ADW

SO–28L

27 Units/Rail

NCP5322ADWR2

SO–28L

1000 Tape & Reel

SO–28L

DW SUFFIX

CASE 751F

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

1

28

LGND

VID0

VCCH1

PWRGD

GATE(H)1

CSREF

GND

CS2

GATE(L)1

CS1

VCCL1

VDRP

VCCL

VFB

ROSC

COMP

SS

VID1

VCCL2

VID2

GND2

VID4

GATE(L)2

VID3

GATE(H)2

ILIM

VCCH2

REF

PIN CONNECTIONS AND

MARKING DIAGRAM

1

28

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