MVPG31

Cover MVPG30x/MVPG31 Field Programmable DSP Switcher™ 1 MHz, 3.0A Peak Current-Limit Step-Down Regulator with AnyVoltage™ Technology Datasheet Doc. No. MV-S102808-00, Rev. G April 14, 2008 Marvell. Moving Forward Faster Document Classification: Proprietary MVPG30x/MVPG31 Datasheet Document Conventions Note: Provides related information or information of special importance. Caution: Indicates potential damage to hardware or software, or loss of data. Warning: Indicates a risk of personal injury. Document Status Doc Status: 2.00 Technical Publication: 0.xx For more information, visit our website at: www.marvell.com Disclaimer No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of Marvell. Marvell retains the right to make changes to this document at any time, without notice. Marvell makes no warranty of any kind, expressed or implied, with regard to any information contained in this document, including, but not limited to, the implied warranties of merchantability or fitness for any particular purpose. Further, Marvell does not warrant the accuracy or completeness of the information, text, graphics, or other items contained within this document. Marvell products are not designed for use in life-support equipment or applications that would cause a life-threatening situation if any such products failed. Do not use Marvell products in these types of equipment or applications. With respect to the products described herein, the user or recipient, in the absence of appropriate U.S. government authorization, agrees: 1) Not to re-export or release any such information consisting of technology, software or source code controlled for national security reasons by the U.S. Export Control Regulations ("EAR"), to a national of EAR Country Groups D:1 or E:2; 2) Not to export the direct product of such technology or such software, to EAR Country Groups D:1 or E:2, if such technology or software and direct products thereof are controlled for national security reasons by the EAR; and, 3) In the case of technology controlled for national security reasons under the EAR where the direct product of the technology is a complete plant or component of a plant, not to export to EAR Country Groups D:1 or E:2 the direct product of the plant or major component thereof, if such direct product is controlled for national security reasons by the EAR, or is subject to controls under the U.S. Munitions List ("USML"). At all times hereunder, the recipient of any such information agrees that they shall be deemed to have manually signed this document in connection with their receipt of any such information. Copyright © 2008. Marvell International Ltd. All rights reserved. Marvell, the Marvell logo, Moving Forward Faster, Alaska, Fastwriter, Datacom Systems on Silicon, Libertas, Link Street, NetGX, PHYAdvantage, Prestera, Raising The Technology Bar, The Technology Within, Virtual Cable Tester, and Yukon are registered trademarks of Marvell. Ants, AnyVoltage, Discovery, DSP Switcher, Feroceon, GalNet, GalTis, Horizon, Marvell Makes It All Possible, RADLAN, UniMAC, and VCT are trademarks of Marvell. All other trademarks are the property of their respective owners. Doc. No. MV-S102808-00 Rev. G Page 2 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 MVPG30x/MVPG31 1 MHz, 3.0A Peak Current-Limit Step-Down Regulator with AnyVoltage™ Technology Datasheet PRODUCT OVERVIEW The Marvell® MVPG30x/MVPG31 is an intelligent digital synchronous step-down (Buck) switching regulator housed in a 4 mm x 3 mm DFN-12 package. The MVPG15x has an additional on-chip Low-Drop-Out (LDO) regulator controller. Internally self-compensated, the step-down regulator requires no external compensation and work with low-ESR output capacitors to simplify the design, minimize the board space, and reduce the amount of external components. The switching frequency for the step-down regulator is 1 MHz, allowing the use of low profile surface mount inductors and low value capacitors. The step-down regulator includes programmable output voltage to provide the user the ability to easily set the output voltage with external resistors, logic control, or serial data interface. The output voltage range is 0.72V to 3.63V. The LDO regulator controller with an external P-Channel MOSFET forms a low dropout regulator capable of driving 800 mA output current. The output voltage of the LDO regulator is fixed. The MVPG30x/MVPG31 operate from an input voltage range of 3.0V to 5.5V, making the device well-suited for portable applications. Other key features of the MVPG30x/MVPG31 include an internal current limit for the step-down regulator, an Under Voltage Lockout (UVLO), and thermal shutdown. Features Tiny 4 mm x 3 mm DFN-12 package 1 MHz switching frequency Small and low profile inductors Stable with ceramic output capacitors No external compensation required Minimum amount of external components Over 95% efficiency High peak switch current limit: 3.0A Input voltage range: 3.0V to 5.5V Serial/Logic programmability AnyVoltage™ Technology provides 64 output voltage selections to provide flexibility Programmable output voltage range: 0.72V to 3.63V P-Channel LDO regulator controller with programmable current limit (MVPG30x) Lead-free packages Built-in under voltage lockout Over voltage protection Thermal shutdown protection Output voltage margining capability Application Portable computing Point of load power supplies DSP power supplies Disk drive power supplies Figure 1: Typical High Efficiency 5.0V to 0.8V/2.0A Step-Down Regulator with 3.3V LDO Regulator VIN +3.0V to + 5.5V R1 R2 10 C2 10uF/6.3V 7 8 C1 0.1uF R3 11K 11 12 10 4 47 mohm U1 PVIN SVIN ILIM LDR 3 2 FDC642 P C3 10uF/6.3V V OUT1 3.3V/up to 0.8A 1 LFB VSET MVPG30B 6 PSET SW PGND SHDN SGND SFB 5 L1 2.0uH V OUT2 0.8V/2.0A Caution This is a very high frequency device and proper PCB layout is required. Refer to Section 6, Applications Information, on page 49 for further information. Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary EP C4 22uF/6.3V Doc. No. MV-S102808-00 Rev. G Page 3 MVPG30x/MVPG31 Datasheet THIS PAGE INTENTIONALLY LEFT BLANK Doc. No. MV-S102808-00 Rev. G Page 4 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 Table of Contents Table of Contents Product Overview ....................................................................................................................................... 3 Table of Contents ....................................................................................................................................... 5 List of Figures............................................................................................................................................. 7 List of Tables ............................................................................................................................................ 11 1 1.1 1.2 1.3 Signal Description ....................................................................................................................... 13 Pin Configuration.............................................................................................................................................13 Pin Type Definitions .......................................................................................................................................15 Pin Description ................................................................................................................................................15 2 2.1 2.2 2.3 2.4 2.5 Electrical Specifications ............................................................................................................. 17 Absolute Maximum Ratings ............................................................................................................................17 Recommended Operating Conditions .............................................................................................................18 Electrical Characteristics ................................................................................................................................19 Switching Step-down Regulator ......................................................................................................................20 LDO Regulator Controller................................................................................................................................21 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Functional Description................................................................................................................ 23 Regulation and Startup ...................................................................................................................................24 3.1.1 Digital Soft Start ................................................................................................................................24 Output Voltage—AnyVoltage™ Technology ...................................................................................................26 Programmable Current Limit for the LDO Regulator Controller ......................................................................28 3.3.1 Maximum LDO Output Current .........................................................................................................29 Under Voltage Lockout....................................................................................................................................29 Over Voltage Protection ..................................................................................................................................29 Thermal Shutdown ..........................................................................................................................................30 Adaptive Transient Response .........................................................................................................................31 4 4.1 4.2 4.3 Functional Characteristics ......................................................................................................... 33 Startup Waveforms .........................................................................................................................................33 Switching Waveforms......................................................................................................................................36 Load Transient Waveforms .............................................................................................................................37 4.3.1 Step-Down Regulator .......................................................................................................................37 4.3.2 LDO Regulator ..................................................................................................................................38 5 5.1 5.2 Typical Characteristics ............................................................................................................... 39 Efficiency Graphs ............................................................................................................................................39 Load Regulation ..............................................................................................................................................40 Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 5 MVPG30x/MVPG31 Datasheet 5.3 5.4 5.5 5.6 Dropout Voltage ..............................................................................................................................................40 RDS (ON) Resistance .....................................................................................................................................41 IC Case and Inductor Temperature.................................................................................................................42 Input Voltage Graph ........................................................................................................................................43 5.6.1 Step-Down Regulator .......................................................................................................................43 5.6.2 LDO Regulator ..................................................................................................................................45 Temperature Graphs .......................................................................................................................................46 5.7.1 Step-Down Regulator .......................................................................................................................46 5.7.2 LDO Regulator ..................................................................................................................................48 5.7 6 6.1 6.2 Applications Information ............................................................................................................ 49 PC Board Layout Considerations and Guidelines ..........................................................................................49 6.1.1 PC Board Layout Examples for MVPG30x/MVPG31 .......................................................................51 Bill of Materials ................................................................................................................................................54 7 7.1 7.2 7.3 Mechanical Drawing .................................................................................................................... 57 Mechanical Drawing ........................................................................................................................................57 Dimensions .....................................................................................................................................................58 Typical Pad Layout Dimensions ......................................................................................................................59 7.3.1 Recommended Solder Pad Layout ...................................................................................................59 8 8.1 8.2 Part Order Numbering/Package Marking .................................................................................. 61 Part Order Numbering .....................................................................................................................................61 Package Marking ............................................................................................................................................62 A Revision History .......................................................................................................................... 65 Doc. No. MV-S102808-00 Rev. G Page 6 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 List of Figures List of Figures Product Overview ....................................................................................................................................... 3 Figure 1: Typical High Efficiency 5.0V to 0.8V/2.0A Step-Down Regulator with 3.3V LDO Regulator ..............3 1 Signal Description ........................................................................................................................... 13 Figure 2: Figure 3: 12-Pin DFN Pin Diagram—MVPG30x Top View ..............................................................................13 12-Pin DFN Pin Diagram—MVPG31 Top View ................................................................................14 2 3 Electrical Specifications ................................................................................................................. 17 Functional Description.................................................................................................................... 23 Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 9: Figure 10: Figure 11: Figure 12: Figure 13: MVPG30x/MVPG31 Block Diagram .................................................................................................23 Output Voltage Window ....................................................................................................................24 Inductor Current Steps at Startup .....................................................................................................25 Soft Startup (0.8V, 1.2V, 1.8V, 2.5V, 3.3V) ......................................................................................25 Soft Startup.......................................................................................................................................25 Startup Sequence ............................................................................................................................27 VSET = 2.5V and PSET = -5% ............................................................................................................27 Maximum Output Current for the FDS642P P-Channel MOSFET....................................................29 UVLO and OVP Waveforms .............................................................................................................30 Adaptive Transient Response ..........................................................................................................31 4 Functional Characteristics.............................................................................................................. 33 Figure 14: Figure 15: Figure 16: Figure 17: Figure 18: Figure 19: Figure 20: Figure 21: Figure 22: Figure 23: Figure 24: Figure 25: Figure 26: Figure 27: Figure 28: Figure 29: Figure 30: Figure 31: Figure 32: Startup Using the Shutdown Pin ......................................................................................................33 Turn Off Using the Shutdown Pin .....................................................................................................33 Enable Threshold at VIN = 3.5V ........................................................................................................33 Enable Threshold at VIN = 5.0V ........................................................................................................33 Input Voltage Soft Start.....................................................................................................................34 Input Voltage Hot Plug ......................................................................................................................34 Step-Down Output Rise Time ...........................................................................................................34 Soft Start Current Limit Steps ...........................................................................................................34 UVLO and OVP Thresholds..............................................................................................................35 Switching Waveforms— PWM Mode ...............................................................................................36 Switching Waveforms— DCM Mode.................................................................................................36 PWM Output Ripple Voltage .............................................................................................................36 Switching Waveforms— DCM Mode-Zoom ......................................................................................36 Load Transient Response ................................................................................................................37 Double-Pulsed Load Response ........................................................................................................37 Load Transient Response ................................................................................................................37 Double-Pulsed Load Response ........................................................................................................37 Load Transient Response ................................................................................................................38 Double-Pulsed Load Response ........................................................................................................38 Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 7 MVPG30x/MVPG31 Datasheet Figure 33: Load Transient Response ................................................................................................................38 5 Typical Characteristics ................................................................................................................... 39 Figure 34: Figure 35: Figure 36: Figure 37: Figure 38: Figure 39: Figure 40: Figure 41: Figure 42: Figure 43: Figure 44: Figure 45: Figure 46: Figure 47: Figure 48: Figure 49: Figure 50: Figure 51: Figure 52: Figure 53: Figure 54: Figure 55: Figure 56: Figure 57: Figure 58: Figure 59: Efficiency Graphs..............................................................................................................................39 Load Regulation................................................................................................................................40 Dropout Voltage ................................................................................................................................40 RDS (ON) Resistance.......................................................................................................................41 IC Case and Inductor Temperature ..................................................................................................42 Supply Current vs. Input Voltage ......................................................................................................43 Output Voltage vs. Input Voltage ......................................................................................................43 Efficiency vs. Input Voltage...............................................................................................................43 Load Regulation vs. Input Voltage ....................................................................................................44 Frequency vs. Input Voltage .............................................................................................................44 Average Output Current Limit vs. Input Voltage ...............................................................................44 Output Voltage vs. Input Voltage ......................................................................................................45 LDO Load Regulation vs. Input Voltage ...........................................................................................45 Average Output Current Limit vs. Input Voltage ...............................................................................45 Supply Current vs. Temperature.......................................................................................................46 UVLO vs. Temperature .....................................................................................................................46 Output Voltage vs. Temperature.......................................................................................................46 Efficiency vs. Temperature ...............................................................................................................46 Load Regulation vs. Temperature ....................................................................................................47 Line Regulation vs. Temperature......................................................................................................47 Average Output Current Limit vs. Temperature ................................................................................47 Frequency vs. Temperature..............................................................................................................47 Output Voltage vs. Temperature.......................................................................................................48 Load Regulation vs. Temperature ....................................................................................................48 Line Regulation vs. Temperature......................................................................................................48 Average Output Current Limit vs. Temperature ................................................................................48 6 Applications Information ................................................................................................................ 49 Figure 60: Figure 61: Figure 62: Figure 63: Figure 64: Figure 65: Figure 66: Figure 67: MVPG30x PCB Layout Schematic ...................................................................................................50 MVPG31 PCB Layout Schematic .....................................................................................................50 Top Silk-Screen (Not to scale)—MVPG30x ......................................................................................51 Top Silk-Screen (Not to scale)—MVPG31........................................................................................51 Top Traces, Vias, and Copper (Not to scale)—MVPG30x................................................................52 Top Traces, Vias, and Copper (Not to scale)—MVPG31 .................................................................52 Bottom Silk Screen, Bottom Trace, Vias, and Bottom Copper (Not to scale)—MVPG30x ...............53 Bottom Silk Screen, Bottom Trace, Vias, and Bottom Copper (Not to scale)—MVPG31 .................53 7 Mechanical Drawing ........................................................................................................................ 57 Figure 68: Figure 69: Mechanical Drawing .........................................................................................................................57 Recommended Solder Pad Layout ...................................................................................................59 8 Part Order Numbering/Package Marking....................................................................................... 61 Doc. No. MV-S102808-00 Rev. G Page 8 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 List of Figures Figure 70: Figure 71: Figure 72: Sample Part Order Number ..............................................................................................................61 MVPG30x Package Marking.............................................................................................................62 MVPG31 Package Marking ..............................................................................................................63 A Revision History ............................................................................................................................... 65 Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 9 MVPG30x/MVPG31 Datasheet THIS PAGE INTENTIONALLY LEFT BLANK Doc. No. MV-S102808-00 Rev. G Page 10 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 List of Tables List of Tables 1 Signal Description ............................................................................................................................ 13 Table 1: Table 2: Pin Type Definitions ..........................................................................................................................15 Pin Description..................................................................................................................................15 2 Electrical Specifications .................................................................................................................. 17 Table 3: Table 4: Table 5: Table 6: Table 7: Absolute Maximum Ratings ..............................................................................................................17 Recommended Operating Conditions...............................................................................................18 Electrical Characteristics ..................................................................................................................19 Switching Step-down Regulator........................................................................................................20 LDO Regulator Controller .................................................................................................................21 3 Functional Description..................................................................................................................... 23 Table 8: Table 9: Table 10: AnyVoltage™ Programming Table for 1% Resistors .......................................................................26 Output Voltage Option Steps ............................................................................................................27 P-Channel MOSFET Selection .........................................................................................................28 4 5 6 Functional Characteristics............................................................................................................... 33 Typical Characteristics .................................................................................................................... 39 Applications Information ................................................................................................................. 49 Table 11: Table 12: MVPG30x BOM ................................................................................................................................54 MVPG31 BOM ..................................................................................................................................55 7 8 A Mechanical Drawing ......................................................................................................................... 57 Table 13: Dimensions .......................................................................................................................................58 Part Order Numbering/Package Marking........................................................................................ 61 Table 14: Part Order Options............................................................................................................................61 Revision History ............................................................................................................................... 65 Table 15: Revision History ................................................................................................................................65 Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 11 MVPG30x/MVPG31 Datasheet THIS PAGE INTENTIONALLY LEFT BLANK Doc. No. MV-S102808-00 Rev. G Page 12 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 Signal Description Pin Configuration 1 1.1 Signal Description Pin Configuration Figure 2: 12-Pin DFN Pin Diagram—MVPG30x Top View LFB 1 12 PSET ILIM 2 11 VSET LDR 3 10 SHDN MVPG30x 9 NC SGND 4 SFB 5 PGND 8 SVIN SW 6 7 PVIN Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 13 MVPG30x/MVPG31 Datasheet Figure 3: 12-Pin DFN Pin Diagram—MVPG31 Top View NC 1 12 PSET NC 2 11 VSET NC 3 10 SHDN MVPG31 9 NC SGND 4 SFB 5 PGND 8 SVIN SW 6 7 PVIN Doc. No. MV-S102808-00 Rev. G Page 14 Document Classification: Proprietary Copyright © 2008 Marvell April 14, 2008, 2.00 Signal Description Pin Type Definitions 1.2 Table 1: Pi n Typ e I O S NC GND Pin Type Definitions Pin Type Definitions Defi ni ti o ns Input only Output only Supply Not Connected Ground 1.3 Pin Description Table 2 provides pin descriptions for the MVPG30x/MVPG31. Table 2: MVPG30x Pi n # 1 Pin Description MVPG31 Pi n # -P in N a m e P i n Ty p e Pi n F u nc t io n LFB I LDO Regulator Controller Feedback Senses the output voltage of the LDO regulator. Connect to the drain of the P-channel MOSFET. When the LDO controller is not used, float the LDR pin. Connect the LFB to SGND, and connect ILIM to SVIN. Current-Limit Sense Pin for the LDO Regulator A built-in offset of 50 mV (typical) between VIN and ILIM in conjunction with the sense resistor is used to set the current-limit threshold for the LDO regulator controller. Connecting this pin to VIN disables the internal current limit circuitry. When the LDO controller is not used, float the LDR pin. Connect the LFB to SGND, and connect ILIM to SVIN. LDO Regulator Controller Driver Connect to the gate of an external P-channel MOSFET. The external P-Channel MOSFET needs to have a threshold of -2.5V or lower and input capacitance (Ciss) of less than 1000 pF. When the LDO controller is not used, float the LDR pin. Connect the LFB to SGND, and connect ILIM to SVIN. Signal Ground This pin must connect to the power ground. Switching Regulator Feedback Senses the output voltage of the switching regulator. Switch Node Internal power MOSFET drain. This pin must connect to an external inductor. 2 -- ILIM I 3 -- LDR O 4 4 SGND O 5 5 SFB I 6 6 SW O Copyright © 2008 Marvell April 14, 2008, 2.00 Document Classification: Proprietary Doc. No. MV-S102808-00 Rev. G Page 15 MVPG30x/MVPG31 Datasheet Table 2: MVPG30x Pi n # 7 Pin Description (Continued) MVPG31 Pi n # 7 P in N a m e P i n Ty p e Pi n F u nc t io n PVIN I Power Input Voltage Internal power MOSFET source. Connect the decoupling 10 µF capacitors between PVIN and PGND and position it as close as possible to the IC. Signal Input Voltage Input voltage is 3.0V to 5.5V for internal circuitry. Connect a 0.1 µF decoupling capacitor between SVIN and SGND and position it as close as possible to the IC. No Connect This pin is left floating. Do not connect this pin. Shutdown Logic low (≤0.8V) enables the step-down switching regulator and the LDO regulator controller. Logic high (≥2.0V) disables the step-down switching regulator and the LDO regulator controller. The high signal duration has to be at least 20 µs to disable both regulators. Voltage Set 1. Connect an external resistor to ground to set the output voltage of the step-down switching regulator. See Table 5, Electrical Characteristics, on page 19 for resistor values and output voltage options. 2. The total capacitance across this pin and SGND should not be greater than 25 pF. Shorting this pin to signal ground, floating this pin, or using 619 kΩ< RVSET or RVSET