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Details, datasheet, quote on part number:NCP5331FTR2
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Datasheet text preview:
NCP5331 Two-Phase PWM Controller with Integrated Gate Drivers
The NCP5331 is a second-generation, two-phase, buck controller that incorporates advanced control functions to power 64-bit AMD Athlont processors and low voltage, high current power supplies. Proprietary multiphase architecture guarantees balanced load-current sharing, reduces output voltage and input current ripple, decreases filter requirements and inductor values, and increases output current slew rate. Traditional Enhanced V2t has been combined with an internal PWM ramp and voltage feedback directly from VCORE to the internal PWM comparator. These features and enhancements deliver the fastest transient response, reduce output voltage jitter, provide greater design flexibility and portability, and minimize overall solution cost. A d v a n c e d features include adjustable power- g o o d delay, programmable overcurrent shutdown timer, superior overvoltage protection (OVP), and differential remote sensing. An innovative overvoltage protection (OVP) scheme safeguards the CPU during extreme situations including power up with a shorted upper MOSFET, shorting of an upper MOSFET during normal operation, and loss of the voltage feedback signal, COREFB+.
Features http://onsemi.com MARKING DIAGRAMS
LQFP-32 FT SUFFIX CASE 873A A WL YY WW
NCP5331 AWLYYWW 32 1 = Assembly Location = Wafer Lot = Year = Work Week
ORDERING INFORMATION
Device NCP5331FTR2 Package LQFP-32 Shipping 2000 Tape & Reel
· · · · · · · · · · · · · · ·
Reduced SMT Package Size (7 mm × 7 mm) Enhanced V2 Control Method Four On-Board Gate Drivers Internal PWM Ramps Differential Remote Voltage Sense Fast Feedback Pin (VFFB) 5-Bit DAC with 0.8% System Tolerance Timed Hiccup Mode Current Limit Power Good Output with Programmable Delay Advanced Overvoltage Protection (OVP) Adjustable Output Voltage Positioning 150 kHz to 600 kHz Operation Set by Resistor "Lossless" Current Sensing through Output Inductors Independent Current Sense Amplifiers 5.0 V, 2 mA Reference Output
© Semiconductor Components Industries, LLC, 2003
1
June, 2003 - Rev. 11
Publication Order Number: NCP5331/D
NCP5331
PIN CONNECTIONS LQFP-32
COMP ILIM 5 VSB PG D CPGD COVC VCCL VCCL1 VFB VDRP LGND CS1 CSREF CS2 VFFB 5 VREF
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8
GL1 GND1 GH1 CBOUT VCCH GH2 GND2 GL2
ROSC -SEN VID0 VID1 VID2 VID3 VID4 VCCL2
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2
R1 15 7.0 V +12 VPWR L3 300 nH
+
+12 V C1 10 µF R2 910 Q7 MMBT2132LT3 R5 3 +12 V D3 5 VSB CC1 2.2 nF CPGD 0.022 µF Q1 COVC 0.22 µF ILIM Q5
27 26 25 32 31 30 29
CIN C2 0.33 µF
D1 7.5 V, 5% BZX84C7V5LT3 C5VSB 0.1 µF CH 1.0 µF CP1 1.0 µF CVCC 1.0 µF D2
CC2 0.1 µF RC1 7.5 k
VCORE L1 825 nH R6 2
VCORE R3 56
1 24 23 22 21 20 19 18 17 2
CF1 1.0 nF CA1 0.01 µF COMP ILIM 5 VSB PGD CPGD COVC VCCL VCCL1
28
PGD
Recommended Components: Q1, Q4: ON Semiconductor NTD60N03 (60 A, 28 V, 6.1 m) Q5-Q9: ON Semiconductor NTD80N02 (80 A, 24 V, 5.0 m) L1, L2: Coiltronics CTX22-15274 or T50-8B/90 w/ 6 T of #16 AWG Bifilar (1 m) L3: Coiltronics CTX15-14771 or T30-26 w/ 3 T of #16 AWG Q6 RF1 3.6 k C3 4700 pF Q9
COREFB+
NCP5331
ROSC -SEN VID0 VID1 VID2 VID3 VID4 VCCL2
9
10
11
12
13
14
15
16
Figure 1. Application Diagram, 12 V to 1.2 V at 52 A, 200 kHz for 64-Bit AMD Athlon Processor
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CSB 470 pF
4 5 6
CIN: 5 × Rubycon 16MBZ1500M10X20 (1500 µF, 16 V, 2.55 ARMS) CO1: 10 × Rubycon 16MBZ1000M10X16 (1000 µF, 16 V, 19 m) CO2: 24 × TDK C2012X5R0J106M (10 µF, 6.3 V, 0805) CO3: 16 × TDK C1608X5R1A224KT (0.22 F, 10 V, 0603) CO4: 2 × Sanyo PosCAP 6TPD330M (330 µF, 6.3 V, 10 m, 4.4 ARMS)
3 RDRP 14.7 k
3
NCP5331
CSA 0.1 µF 1.0 M
7 8
RS 1.87 k
RCB 6.2 k
Q4
VFB VDRP LGND CS1 CSREF CS2 VFFB 5 VREF
GL1 GND1 GH1 CBOUT VCCH GH2 GND2 GL2
CP2 1.0 µF
L2 825 nH Q7 Q8 R7 2
ILIM RLIM1 2.37 k CR E F 0.1 µF ROSC 51 k VID0 CFFB 0.01 µF RL I M 2 910
CO1
+
VID2 VID1
VID4 VID3
CL 1.0 µF
D4 BAT54CLT1 12 V 5 VSB RS2 10 k CCB 1.0 µF SWNODE2 SWNODE1
CO4
+
C4 4700 pF
COREFB#
CO2
LGND Ties to PGND at 1 Point VCORE
R4 56 CS1 0.11 µF CS2 0.1 µF RS1 10 k
CO3
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