NCP5322A_07 Datasheet, PDF (1/31 Pages) ON Semiconductor – Two−Phase Buck Controller with Integrated Gate Drivers and 5−Bit DAC

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 V²â„¢ 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 V_CORE 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 V_CORE
• 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
V_FB
V_DRP
CS1
CS2
CS_REF
PWRGD
V_ID0
V_ID1
V_ID2
V_ID3
V_ID4
I_LIM
REF
28
R_OSC
V_CCL
V_CCL1
GATE(L)1
GND
GATE(H)1
V_CCH1
LGND
SS
V_CCL2
GATE(L)2
GND2
GATE(H)2
V_CCH2
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
1
January, 2007 − Rev. 5
Publication Order Number:
NCP5322A/D