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ON Semiconductor - Two-Phase Buck Controller

Numéro de référence NCP5322A
Description Two-Phase Buck Controller
Fabricant ON Semiconductor 
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NCP5322A fiche technique
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 V2control 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 www.DataSheet4U.com
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
Pb−Free Packages are Available
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
28
1
SO−28L
DW SUFFIX
CASE 751F
PIN CONNECTIONS AND
MARKING DIAGRAM
1
COMP
VFB
VDRP
CS1
CS2
CSREF
PWRGD
VID0
VID1
VID2
VID3
VID4
ILIM
REF
28
ROSC
VCCL
VCCL1
GATE(L)1
GND
GATE(H)1
VCCH1
LGND
SS
VCCL2
GATE(L)2
GND2
GATE(H)2
VCCH2
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping
NCP5322ADW
NCP5322ADWG
SO−28L
SO−28L
(Pb−Free)
26 Units/Rail
26 Units/Rail
NCP5322ADWR2 SO−28L 1000 Tape & Reel
NCP5322ADWR2G SO−28L 1000 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2007
January, 2007 − Rev. 5
1
Publication Order Number:
NCP5322A/D

PagesPages 31
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