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Número de pieza | NCP5322A | |
Descripción | Two-Phase Buck Controller | |
Fabricantes | ON Semiconductor | |
Logotipo | ||
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No Preview Available ! 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 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
1 page NCP5322A
ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; 9.0 V < VCCH1 = VCCH2 < 20 V; 4.5 V <
VCCL = VCCL1 = VCCL2 < 14 V; CGATE = 3.3 nF, RR(OSC) = 32.4 kW, CCOMP = 1.0 nF, CREF = 0.1 mF, CSS = 0.1 mF,
DAC Code 10000 (1.45 V), CVCC = 1.0 mF; unless otherwise specified.)
Characteristic
Test Conditions
Min Typ Max
Voltage Identification DAC
VID4
1
Accuracy (all codes)
VID3
1
VID2
1
VID1
1
VID0
1
Measure VFB = COMP
−
± 1.0
Fault Mode − Output Off
11110
−
1.089
1.100
1.111
11101
−
1.114
1.125
1.136
11100
−
1.139
1.150
1.162
11011
−
1.163
1.175
1.187
11010
−
1.188
1.200
1.212
11001
−
1.213
1.225
1.237
11000
−
1.238
1.250
1.263
10111
−
1.262
1.275
1.288
10110
−
1.287
1.300
1.313
10101
−
1.312
1.325
1.338
10100
−
1.337
1.350
1.364
10011
−
1.361
1.375
1.389
10010
−
1.386
1.400
1.414
10001
−
1.411
1.425
1.439
10000
−
1.436
1.450
1.465
01111
−
1.460
1.475
1.490
01110
−
1.485
1.500
1.515
01101
−
1.510
1.525
1.540
01100
−
1.535
1.550
1.566
01011
−
1.559
1.575
1.591
01010
−
1.584
1.600
1.616
01001
−
1.609
1.625
1.641
01000
−
1.634
1.650
1.667
00111
−
1.658
1.675
1.692
00110
−
1.683
1.700
1.717
00101
−
1.708
1.725
1.742
00100
−
1.733
1.750
1.768
00011
−
1.757
1.775
1.793
00010
−
1.782
1.800
1.818
00001
−
1.807
1.825
1.843
00000
−
1.832
1.850
1.869
Input Threshold
Input Pull−up Resistance
Pull−up Voltage
VID4, VID3, VID2, VID1, VID0
VID4, VID3, VID2, VID1, VID0
−
1.00 1.25 1.50
25 50 100
3.15 3.30 3.45
Unit
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
kW
V
http://onsemi.com
5
5 Page NCP5322A
TYPICAL PERFORMANCE CHARACTERISTICS
900 25
800
20
700
600 15
500
400 10
300
5
200
100
10 20 30 40 50 60
ROSC Value (kW)
Figure 4. Oscillator Frequency vs. ROSC Value
70
0
10 20 30 40 50 60 70
ROSC Value, kW
Figure 5. VFB Bias Current vs. ROSC Value
80
120
100
80
60
40
20
0
0 2 4 6 8 10 12 14 16
Load Capacitance, nF
Figure 6. GATE(H) Rise Time vs. Load Capacitance
Measured from 1.0 V to 4.0 V with VCC at 5.0 V
120
100
80
60
40
20
0
0 2 4 6 8 10 12 14 16
Load Capacitance, nF
Figure 7. GATE(H) Fall Time vs. Load Capacitance
Measured from 4.0 V to 1.0 V with VCC at 5.0 V
120
100
80
60
40
20
0
0 2 4 6 8 10 12 14 16
Load Capacitance, nF
Figure 8. GATE(L) Rise Time vs. Load Capacitance
Measured from 1.0 V to 4.0 V with VCC at 5.0 V
120
100
80
60
40
20
0
0 2 4 6 8 10 12 14 16
Load Capacitance, nF
Figure 9. GATE(L) Fall Time vs. Load Capacitance
Measured from 4.0 V to 1.0 V with VCC at 5.0 V
http://onsemi.com
11
11 Page |
Páginas | Total 31 Páginas | |
PDF Descargar | [ Datasheet NCP5322A.PDF ] |
Número de pieza | Descripción | Fabricantes |
NCP5322A | Two-Phase Buck Controller | ON Semiconductor |
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