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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
http://onsemi.com
2
applications. Enhanced V control architecture provides the fastest
28
possible transient response, excellent overall regulation, and ease of
use. The NCP5322A is a second–generation PWM controller because
1
2
it optimizes transient response by combining traditional Enhanced V
SO–28L
DW SUFFIX
CASE 751F
with an internal PWM ramp and fast–feedback directly from V
to
CORE
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.
PIN CONNECTIONS AND
MARKING DIAGRAM
1
28
COMP
R
OSC
CCL
V
FB
V
V
V
CCL1
DRP
CS1
GATE(L)1
CS2
REF
PWRGD
GND
Features
CS
GATE(H)1
2
• Enhanced V Control Method with Internal Ramp
V
CCH1
• Internal PWM Ramp
V
V
V
V
V
LGND
SS
ID0
ID1
ID2
ID3
ID4
LIM
• Fast–Feedback Directly from V
CORE
V
CCL2
• 5–Bit DAC with 1.0% Accuracy
GATE(L)2
GND2
GATE(H)2
• Adjustable Output Voltage Positioning
• 4 On–Board Gate Drivers
I
REF
V
CCH2
• 200 kHz to 800 kHz Operation Set by Resistor
• Current Sensed through Buck Inductors or Sense Resistors
• Hiccup Mode Current Limit
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
• Individual Current Limits for Each Phase
• On–Board Current Sense Amplifiers
• 3.3 V, 1.0 mA Reference Output
WW, W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
• 5.0 V and/or 12 V Operation
• On/Off Control (through Soft Start Pin)
• Power Good Output with Internal Delay
NCP5322ADW
27 Units/Rail
SO–28L
SO–28L
NCP5322ADWR2
1000 Tape & Reel
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
December, 2001 – Rev. 4
NCP5322A/D