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Details, datasheet, quote on part number:NCP5322A
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Datasheet text preview:
NCP5322A Two-Phase Buck Controller with Integrated Gate Drivers and 5-Bit DAC
The NCP5322A is a secondgeneration, twophase step down controller which incorporates all control functions required to power high performance processors and high current power supplies. Proprietary multiphase 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 secondgeneration PWM controller because it optimizes transient response by combining traditional Enhanced V2 with an internal PWM ramp and fastfeedback directly from VCORE to the internal PWM comparator. These enhancements provide greater design flexibility, facilitate use and reduce output voltage jitter. The NCP5322A multiphase 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.
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28 1 SO28L DW SUFFIX CASE 751F
PIN CONNECTIONS AND MARKING DIAGRAM
1 COMP VFB VDRP CS1 CS2 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 ILIM REF A WL, L YY, Y WW, W 28 ROSC VCCL VCCL1 GATE(L)1 GND GATE(H)1 VCCH1 LGND SS VCCL2 GATE(L)2 GND2 GATE(H)2 VCCH2
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Features Enhanced V2 Control Method with Internal Ramp Internal PWM Ramp FastFeedback Directly from VCORE 5Bit DAC with 1.0% Accuracy Adjustable Output Voltage Positioning 4 OnBoard 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 OnBoard 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
= Assembly Location = Wafer Lot = Year = Work Week
ORDERING INFORMATION
Device NCP5322ADW NCP5322ADWR2 Package SO28L SO28L Shipping 27 Units/Rail 1000 Tape & Reel
NCP5322A AWLYYWW
Semiconductor Components Industries, LLC, 2001
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December, 2001 Rev. 4
Publication Order Number: NCP5322A/D
NCP5322A
+12 V D3 MBRA120LT3 LVCC ENABLE D1 BAT54SLT1 D2 BAT54SLT1 1.0 µF R3 RFBK1 6.04 k CFBK2 470 pF CA M P 2.2 nF VFB CC M P 1 2.2 nF CV C C 1.0 µF SIGGND SIGGND RD R P 1 21 k COMP VFB VDRP Cs1 CS2 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 ILIM REF ROSC 64.9 k ROSC VCCL VCCL1 GL1 GND1 GH1 VCCH1 LGND SS VCCL2 GL2 GND2 GH2 VCCH2 CS S 0.1 µF SIGGND SWNODE1 SWNODE2 CC S 2 0.01 µF RC S 2 75 k142 k 330 Q5 2N3904 BZX84C18LT1 D4 18 V C OUT Electrolytics
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L1 300 nH C2 1.0 µF
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C1 1.0 µF
CI N P U T Electrolytics
CQ1 0.1 µF
Q1 L2 1.1 µH Q2
CV C C L x 1.0 µF CC E R Ceramics CQ3 0.1 µF CV C C H x 1.0 µF
RC S R E F 49.9 k CC S R E F 0.01 µF SIGGND
CSREF PWRGD VID0 VID1 VID2 VID3 VID4
Q3 L3 1.1 µH
Q4 SIGGND
RL I M 2 1.0 k
RL I M 1 3.57 k SIGGND
CR E F 0.1 µF SIGGND CS1 CS2
NCP5322A
RC S 1 75 k142 k
CC S 1 0.01 µF
Recommended Components: L1: Coiltronics P/N CTX1514771 or T3026 core with 3T of #16 AWG L2: Coiltronics P/N TBD or T5052B with 5T of #16 AWG Bifilar CINPUT: 3 × Sanyo Oscon 16SP270M (270 µF, 16 V, 4.4 ARMS, 18 m) COUT: 10 × Rubycon 16MBZ1500M10x20 (1500 µF, 16 V, 13 m) or 8 × Sanyo Oscon 4SP820M (820 µF, 4 V, 12 m) CCERAMICS: 12 × Panasonic ECJ3YB0J106K (10 µF, 6.3 V) Q1Q4: ON Semiconductor NTB85N03 (28 V, 85 A) LVCC: Murata P/N BLM21P221SG (220 at 100 MHz)
Figure 1. Application Diagram, 12 V Only to 1.6 V at 45 A, 220 kHz
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NCP5322A
+12 V L1 300 nH +5.0 V D1 MBRA120LT3 ENABLE
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LVCC
CQ1 0.1 µF
CI N P U T Electrolytics
RFBK1 3.40 k CFBK2 470 pF
CA M P 2.2 nF VFB CC M P 1 2.2 nF CV C C 1.0 µF SIGGND SIGGND
Q1 L2 825 nH Q2
RD R P 1 10.7 k COMP VFB VDRP Cs1 CS2 CSREF PWRGD VID0 VID1 VID2 VID3 VID4 ILIM REF
RC S R E F 33 k CC S R E F 0.01 µF SIGGND
CSREF PWRGD VID0 VID1 VID2 VID3 VID4
RL I M 2 1.0 k
RL I M 1 4.12 k SIGGND
ROSC 39.2 k ROSC VCCL VCCL1 GL1 GND1 GH1 VCCH1 LGND SS VCCL2 GL2 GND2 GH2 VCCH2 CS S 0.1 µF
C OUT Electrolytics
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CV C C L x 1.0 µF CC E R Ceramics
CV C C H x 1.0 µF
CQ3 0.1 µF Q3 L3 825 nH
Q4 SIGGND
CR E F 0.1 µF SIGGND CS1 CS2
NCP5322A
RC S 1 50 k100 k
SIGGND SWNODE1 SWNODE2
CC S 1 0.01 µF
CC S 2 0.01 µF
RC S 2 50 k100 k
Recommended Components: L1: Coiltronics P/N CTX1514771 or T3026 core with 3T of #16 AWG L2: Coiltronics P/N CTX2215401 or T5052 with 5T of #16 AWG Bifilar LVCC: Murata P/N BLM21P221SG (220 at 100 MHz) Q1Q4: ON Semiconductor NTB85N03 (28 V, 85 A)
Figure 2. Alternate Application Diagram, 5.0 V (with 12 V Bias) to 1.6 V at 45 A, 335 kHz
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