DSP SwitcherTM 88MG875z-x/ 88MG876-x Series 5A Rated Output Current, Non-Isolated, StepDown Switching Regulator Module with AnyVoltageTM Technology Advance Specifications, Patent Pending Doc. No. MV-S102822-00, Rev. B April 4, 2006 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Document Status Advance Information This document contains design specifications for initial product development. Specifications may change without notice. Contact Marvell Field Application Engineers for more information. Preliminary Information This document contains preliminary data, and a revision of this document will be published at a later date. Specifications may change without notice. Contact Marvell Field Application Engineers for more information. Final Information This document contains specifications on a product that is in final release. Specifications may change without notice. Contact Marvell Field Application Engineers for more information. Revision Code: Rev. B Advance Technical Publication: 0.61 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 (c) 2006. Marvell International Ltd. All rights reserved. Marvell, the Marvell logo, Moving Forward Faster, Alaska, Fastwriter, GalNet, Libertas, Link Street, NetGX, PHYAdvantage, Prestera, Virtual Cable Tester, and Yukon are registered trademarks of Marvell. AnyVoltage, Discovery, DSP Switcher, Feroceon, GalTis, Horizon, RADLAN, Raising The Technology Bar, The Technology Within, UniMAC, and VCT are trademarks of Marvell. All other trademarks are the property of their respective owners. Doc. No. MV-S102822-00 Rev. B Page 2 Copyright@ 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance 88MG875z-x/88MG876-x Series 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology F EATURES /B ENEFITS * * SIP Package * * * * * * * * * * * * DIP Package * * True lead-free "plug-n-play" solution No external components required - except a single voltage programming resistor Tiny SIP, DIP, and SMT packages available Input voltage range: 3V to 5.5V Programmable output voltage: 0.72V to 3.63V 1 MHz switching frequency 2% output voltage tolerance 95% efficiency 2.5V and 3.3V LDO Secondary voltage versions Ultra-fast transient response Any VoltageTM Technology provides 72 output selections and shortens design cycles Output voltage margining capability for easy system testing and qualification High reliability - lowest component count Works with any external capacitive load (low ESR, high ESR) Built-in undervoltage lockout, thermal protection, and current limit Control IC and passive kit components are available for high volume user SMT Package (TBD) Copyright@ 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 3 O VERVIEW A PPLICATIONS The 88MG875z-x/88MG876-x Series1 is a high-performance, non-isolated, DC-DC converter module for point-of-load (POL) applications. It functions as a synchronous step-down (buck) switching regulator in a small form factor. The module includes a proprietary Marvell(R) integrated regulator device. The switching frequency for the regulator is 1 MHz, and no external components are required (except one voltage programming resistor, see Section 2.1 "Output Voltage Any VoltageTM Technology" on page 13). * * * * * * Point-of-load power supplies Networking/Datacom systems Portable computing Servers DSP power supplies LAN/WAN Ultra-high conversion efficiency (typically 95%) allows for the use of the 88MG875z-x/88MG876-x Series without any heatsink. Additionally, the 88MG875z-x/ 88MG876-x Series includes an innovative single resistor method2 to program the output voltage. This voltage is defined by the user with an external resistor. The 88MG875z-x/88MG876-x Series operates from an input voltage range of 3V to 5.5V, making the device well suited for portable applications. The output voltage range is 0.72V to 3.63V, supporting future devices down to 65 nm geometries. Other key features include an internal current limit, an undervoltage lockout, a thermal shutdown, and an ambient temperature range of -40C to 85C. 1. The 88MG875z-x/88MG876-x series includes 88MG75z-S, 88MG875z-D, 88MG875z-T, 88MG876-S, 88MG876-D, and 88MG876-T. 2. Patent Pending D EVICE F EATURE D IFFERENCES The table below summarizes the feature differences between 88MG875z, and 88MG876 Fe atur es 88MG875 z 8 8MG8 76 Rated Output Current 5A 5A Packages * * * LDO LDO Voltage Option 12-Pin SIP 9-Pin DIP 9-Pin SMT * * * 11-Pin SIP 8-Pin DIP 8-Pin SMT No LDO Doc. No. MV-S102822-00, Rev. B Page 4 Copyright@ 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Table 1: Product Selector Table Part Name Des cription L DO O ut pu t Voltage O ut p ut Curre nt Pac kag e 88MG875B-S SIP Module: 5A Rated Output Current with LDO 3.3V 5A 12-Pin SIP 88MG875B-D DIP Module: 5A Rated Output Current with LDO 3.3V 5A 9-Pin DIP 88MG875B-T SMT Module: 5A Rated Output Current with LDO 3.3V 5A 9-Pin SMT 88MG875E-S SIP Module: 5A Rated Output Current with LDO 2.5V 5A 12-Pin SIP 88MG875E-D DIP Module: 5A Rated Output Current with LDO 2.5V 5A 9-Pin DIP 88MG875E-T SMT Module: 5A Rated Output Current with LDO 2.5V 5A 9-Pin SMT 88MG876-S SIP Module: 5A Rated Output Current -- 5A 11-Pin SIP 88MG876-D DIP Module: 5A Rated Output Current -- 5A 8-Pin DIP 88MG876-T SMT Module: 5A Rated Output Current -- 5A 8-Pin SMT Copyright@ 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 5 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Table of Contents SECTION 1. SIGNAL DESCRIPTION ................................................................... 7 1.1 Pin Diagram.....................................................................................................................7 1.2 Pin Description .............................................................................................................11 SECTION 2. FUNCTIONAL DESCRIPTION ......................................................... 13 2.1 Output Voltage - Any VoltageTM Technology .............................................................13 2.2 Output Voltage Margining............................................................................................14 2.3 Regulation and Start-up...............................................................................................15 2.4 Digital Soft Start ...........................................................................................................15 2.5 Undervoltage Lockout (UVLO) ....................................................................................16 2.6 Thermal Shutdown .......................................................................................................16 2.7 PGOOD ..........................................................................................................................16 SECTION 3. ELECTRICAL SPECIFICATIONS ..................................................... 17 3.1 Absolute Maximum Ratings ........................................................................................17 3.2 Recommended Operating Conditions ........................................................................17 3.3 Electrical Characteristics.............................................................................................18 3.4 Startup Waveforms......................................................................................................20 3.5 Load Transient Response Waveforms .......................................................................23 3.6 Thermal Shutdown .......................................................................................................24 3.7 Switching Waveforms ..................................................................................................24 3.8 Efficiency.......................................................................................................................26 SECTION 4. MECHANICAL DRAWINGS ............................................................ 27 4.1 Mechanical Drawings for 88MG875z-x .......................................................................27 4.2 Mechanical Drawings for 88MG876-x .........................................................................30 SECTION 5. 5.1 ORDERING INFORMATION ............................................................ 32 Ordering Part Numbers and Package Markings ........................................................32 Doc. No. MV-S102822-00, Rev. B Page 6 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Signal Description Pin Diagram Section 1. Signal Description 1.1 Pin Diagram Figure 1: 88MG875z-S Package - Component View 88MG875z-S 1 3 2 1: 2: 3: 4: 5: 6: Figure 2: 4 5 6 7 7: 8: 9: 10: 11: 12: PSET VSET GND GND VOUT VOUT LDO SDI Mi ssi ng Pi n ENABLE PGOOD VI N 8 9 10 11 12 88MG875z-D Package - Component View 1 9 2 8 3 88MG875z-D 4 1: 2: 3: 4: 5: 5 GND PSET VI N ENABLE LDO 6 6: 7: 8: 9: SDI VSET PGOOD VOUT Copyright (c) 2006 Marvell April 4, 2006, Advance 7 Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 7 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Figure 3: 88MG875z-T Packages - Component View 1 9 2 8 3 88MG875z-T 4 1: 2: 3: 4: 5: 5 7 6 GND PSET VI N ENABLE LDO 6: 7: 8: 9: SDI VSET PGOOD VOUT Figure 4: Connection Block Configuration Sample for 88MG875z -S LDO Load EN GND VIN VOUT VSET GND Optional PSET 88MG875z-S Load 3V-5.5V Doc. No. MV-S102822-00, Rev. B Page 8 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Signal Description Pin Diagram Figure 5: 88MG876-S Package - Component View 88MG876-S 1 1: 2: 3: 4: 2 3 4 SDI MI SSI NG PI N ENABLE PGOOD 5 6 5: 6: 7: 8: 7 VI N PSET VSET GND 8 9 10 11 9: GND 10: VOUT 11: VOUT Figure 6: 88MG876-D Package - Component View 8 1 2 7 3 4 5 1: GND 2: PSET 3: VIN 4: ENABLE 88MG876-D 5: SDI 6: VSET 7: PGOOD 8: VOUT Copyright (c) 2006 Marvell April 4, 2006, Advance 6 Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 9 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Figure 7: 88MG876-T Package - Component View 8 1 2 7 3 4 1: 2: 3: 4: GND PSET VI N ENABLE 6 88MG876-T 5 5: 6: 7: 8: SDI VSET PGOOD VOUT Figure 8: Connection Block Configuration Sample for 88MG876-S Optional EN VIN GND VOUT VSET GND PSET 88MG876-S Load 3V-5.5V Doc. No. MV-S102822-00, Rev. B Page 10 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Signal Description Pin Description 1.2 Pin Description Name LDO_OUT Pin Des cription 1 Secondary Output Voltage. Connect directly to load with a short wide PCB trace. PSET Percent Set. An external resistor is connected to the ground to trim the set voltage by the percentage value. See Table 3 in the Section 2.1 "Output Voltage - Any VoltageTM Technology" on page 13 for resistor values and percentage options. The total capacitance across this pin and GND should be less than 25 pF. Shorting this pin to ground, floating this pin, or using RVSET > 619K or RVSET < 7.68K does not affect the set voltage. A resistor with tolerance of 5% or better must be used. If this pin is not used, it is recommended that the pin be tied to GND. GND Power ground. Connect this pin to a suitable low-impedance ground plane. NC Not connected. No pin. VSET Voltage set. An external resistor is connected to ground to set the output voltage of the switching regulator. See Table 3 in the Section 2.1 "Output Voltage - Any VoltageTM Technology" on page 13 for resistor values and output voltage options. The total capacitance across this pin and GND should be less than 15 pF. Shorting this pin to ground, floating this pin, or using RVSET > 619K or RVSET < 7.68K disables the switching regulator. A resistor with tolerance of 5% or better must be used. VOUT Output voltage. Connect directly to load with a short wide PCB trace. VIN 3V - 5.5V Input voltage. EN Enable Logic low ( 0.8V) disables the regulator. Open collector will enable the regulator due to internal pull-up resistor provided. The high signal has to be at least 20 s in duration to enable the regulator. TDO Terminal Data Output. This pin is a special function pin. Contact your Marvell(R) representative for information otherwise this pin should be left floating. TDI Terminal Data Input. This pin is a special function pin. Contact your Marvell(R) representative for information otherwise this pin should be left floating. PGOOD The power good pin (PG) is an active-high, open-drain output pin. Refer to Section 2.7 for further details on the PGOOD pin. 1. This pin is present in 88MG875z. Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 11 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Table 2: Pin Number Assignment Table Pin Na me 88MG875z-S 88MG875z -D/T 88MG876 -S 88MG876 -D /T LDO_OUT 1 5 - - SDI 2 6 1 5 GND 9, 10 1 8, 9 1 MISSING PIN 3 - 2 - VSET 8 7 7 6 VOUT 11, 12 9 10, 11 8 VIN 6 3 5 3 ENABLE 4 4 3 4 PGOOD 5 8 4 7 PSET 7 2 6 2 Doc. No. MV-S102822-00, Rev. B Page 12 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Functional Description Output Voltage - Any VoltageTM Technology Section 2. Functional Description 2.1 Output Voltage - Any VoltageTM Technology The output voltage of the 88MG875z-x/88MG876-x Series devices is programmed by using the look-up Table 3 to select the resistor value for the VSET and PSET pins. The VSET pin sets the output voltage, and the PSET pin trims the set voltage to a percentage value. For example, to program 2.25V output, a 165k resistor is selected for the VSET pin, and an 11k resistor is selected for the PSET pin. The 165k resistor sets the output voltage to 2.5V and the 11k resistor trims the set voltage off by 10% (or -10%). Using a resistor value greater than 619k or less than 7.68k for the VSET pin disables the switching regulator and sets the SW pin to high impedance. Using a resistor value greater than 619k or less than 7.68k for the PSET pin does not affect the set voltage. Using a VSET resistor with value greater than 619 kohm or less than 7.68 kohm disables the step-down switching regulator and sets the SW pin to high impedance. If the VSET resistor's value is outside the 5% tolerance, the output can be either higher or lower than the set voltage. Using a resistor value greater than 619 kohm or less than 7.68 kohm for the PSET pin does not affect the set voltage. When the PSET pin is not used, it must be connected to ground. Like the VSET resistor, the percent value can be either higher or lower if the PSET resistor's value is outside the 5% tolerance. Table 3: Any Voltage Programming Table for 5% Resistors VSET PSET -10.0% -7.5% -5.0% -2 .5 % 2 .5 % 11k 18k 3 0k 51 k GND 1 00k 160 k 27 0k 4 70k 11 k 0.720 0.740 0.760 0.780 0.800 0.820 0.840 0.860 0.880 1 8k 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 3 0k 1.080 1.110 1.140 1.170 1.200 1.230 1.260 1.290 1.320 5 1k 1.350 1.388 1.425 1.463 1.500 1.575 1.575 1.613 1.650 1 00k 1.620 1.665 1.710 1.755 1.800 1.890 1.890 1.925 1.980 1 60k 2.250 2.313 2.375 2.438 2.500 2.625 2.625 2.688 2.750 2 70k 2.700 2.775 2.850 2.925 3.000 3.150 3.150 3.225 3.300 4 70k 2.970 3.053 3.135 3.218 3.300 3.465 3.465 3.548 3.630 Copyright (c) 2006 Marvell April 4, 2006, Advance 5.0% 7.5% 1 0. 0% Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 13 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Table 4: Any Voltage Programming Table for 1% Resistors VSET PSET -10.0% -7.5% -5.0% -2.5% 2 .5 % 5.0 % 7.5% 10 .0 % 11k 18.7k 3 1. 6k 53.6k O pe n /GND 9 7. 6k 165k 280 k 47 5k G ND 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11k 0.720 0.740 0.760 0.780 0.800 0.820 0.840 0.860 0.880 18 .7 k 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 31 .6 k 1.080 1.110 1.140 1.170 1.200 1.230 1.260 1.290 1.320 53 .6 k 1.350 1.388 1.425 1.463 1.500 1.538 1.575 1.613 1.650 97 .6 k 1.620 1.665 1.710 1.755 1.800 1.845 1.890 1.935 1.980 16 5k 2.250 2.313 2.375 2.438 2.500 2.563 2.625 2.688 2.750 28 0k 2.700 2.775 2.850 2.925 3.000 3.075 3.150 3.225 3.300 47 5k 2.970 3.053 3.135 3.218 3.300 3.383 3.465 3.548 3.630 Open 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 The VSET and PSET resistor are read once during start-up before the output voltage is turned on. After the output voltage is turned on, the VSET and PSET resisters are ignored.The benefit of this is that the output voltage tolerance is not dependant upon the tolerance or thermal characteristics of these resistors. 2.2 Output Voltage Margining A useful application of the Marvell(R) Any VoltageTM technology is "output voltage margining". Voltage margining is commonly used during system qualification to evaluate operation at "corner" conditions of voltage, temperature etc. Typically, output voltage will be offset up and down by some percentage (margin) of the nominal value. For the 88MG875z-x/88MG876-x Series, the VSET pin/resistor controls the nominal voltage of the switching regulator output while the PSET pin/resistor controls the margin voltage. As can be seen in Table 3, the PSET pin allows the margin to be set as high as 10% above and as low as -10% below the nominal setpoint established by VSET. Depending on the value of the PSET resistor intermediate points of 7.5%, 5% and 2.5% can also be accessed. For example, if an application calls for a nominal output voltage of 1.5V then Table 3 prescribes a value of R1 for the VSET resistor. This selection is shown in Figure 9 connected to the VSET pin. To offset the voltage above and below the nominal value, the PSET pin can be used with resistor values again from Table 3. Additionally, switches S1 and S2 can be alternately closed to select from the two resistors R3 and R2 (offset values) for PSET. If more offsets are required more switches and resistors may be used. As shown in Figure 9, if S1 is closed and S2 opened a positive 5% offset would be added to the nominal 1.5V output yielding 1.575V. Conversely, if S1 is opened and S2 closed the output would be offset to -5% from 1.5V, or 1.425V. Finally with both S1 and S2 opened the output would return to the nominal 1.5V. Thus voltage margining can be simply and reliably implemented with a minimum of components and design effort. Doc. No. MV-S102822-00, Rev. B Page 14 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Functional Description Regulation and Start-up Figure 9: Output Voltage Margining EN VIN GND VSET VOUT GND PSET 88MG876-x Load R3 R2 S2 S1 3V-5.5V R1 2.3 Regulation and Start-up The step-down switching regulator uses Pulse Width Modulation (PWM) And Pulse Frequency Modulation (PFM) modes to regulate the output voltage using digital control. The mode of operation depends on the level of output current and the output voltage. In steady states, the step-down switching regulator monitors the current flowing through the inductor to determine if the regulator is handling heavy or light load applications. For heavy load applications, the step-down regulator operates in the PWM mode (B and C) to minimize the ripple current for optimum efficiency and to minimize the ripple output voltage. The step-down regulator operates in the PFM and Discontinuous Conduction Mode (DCM) (A and D) to limit the switching action for optimum efficiency in light load applications. In this mode, the average output voltage is slightly higher than the average output voltage for heavy transient load applications. Figure 10: Output Voltage Window A B Typical Vout D D PFM Mode PWM Moed PFM Mode 2.4 Digital Soft Start During start-up, the 88MG875z-x/88MG876-x provides a soft start function. Soft start reduces surge currents from input voltage and provides a well-controlled output voltage rise characteristics. The rate of the output voltage startup is limited by the value of the output capacitor and the internal current limit circuitry. This combination forces the output voltage to come up slowly, providing a soft-start characteristic. During soft start, the 88MG875z-x/88MG876-x feeds a constant current to the output capacitor in several steps. Figure 11 shows the inductor current waveform during startup. The current limit is ramped up in 7 steps beginning at approximately 40% of the current limit rating and ending at 100% at 25 s per step. The buck regulator behaves like a current source during this time as the output ramps up slowly. Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 15 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Figure 11: Start-up Using the Enable Pin VOUT_LDO 2V/DIV VOUT_BUCK 1V/DIV Enable 2V/DIV 1 ms/DIV 2.5 Undervoltage Lockout (UVLO) The 88MG875z-x/88MG876-x Series incorporates undervoltage-lockout circuitry to disable the step-down regulator when the input voltage is below 2.75V (typical). The step-down regulator is enabled when the input voltage is above 2.85V (typical). 2.6 Thermal Shutdown If the junction temperature of the Control IC on 88MG875z-x/88MG876-x Series exceeds 150C (typical), the thermal shutdown circuitry disables the step-down regulator. The step-down regulator is enabled when the junction temperature falls to 120C (typical). 2.7 PGOOD The power good pin (PG) is an active-high, open-drain output pin. It is asserted when the output voltage of the step-down regulator is below the threshold. When the output voltage is above the threshold, the power good pin is de-asserted. Setting the output voltage greater than 1.35V, the threshold voltage is 0.9% * VOUT (typical). Setting the output voltage less than 1.32V, the threshold voltage is VOUT - 130mV (typical). A built-in 25s (tDELAY) delay is incorporated to prevent nuisance tripping. V PGTH V BUCK <t DELAY 0V V PG V PGH V PGL >t Doc. No. MV-S102822-00, Rev. B Page 16 DELAY Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Electrical Specifications Absolute Maximum Ratings Section 3. Electrical Specifications 3.1 Absolute Maximum Ratings Stresses above those listed in Absolute Maximum Ratings may cause permanent device failure. Functionality at or above those limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. Par amete r Symb ol Input Voltage to GND VIN Ran ge Un its -0.3 to 6.0 V Voltage Set to GND VSET -0.6 to (VIN + 0.3) V Percentage Set Voltage to GND VPSET -0.6 to (VIN + 0.3) V Shutdown Voltage to GND VSHDN -0.6 to (VIN + 0.3V) V Storage Temperature Range TSTOR -65 to +150 C Peak Switch Current IPEAK 7.5 A Rated Output Current IOUT 5 A LDO Output Current (Peak) IOUT_LDO 450 mA 3.2 Recommended Operating Conditions1 Para meter Sy mbol Range Units Input Voltage VIN 3 to 5.5 V Operating Temperature Range2 TOP -40 to +85 C 1. This device is not guaranteed to function outside the specified operating range. 2. This device is guaranteed to meet the specifications from 0C to 70C. Any specifications that pertains to the operating temperature range -40C to +85C are assured by design, characterization, and correlation with statistical process controls. Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 17 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology 3.3 Electrical Characteristics The following applies unless otherwise noted: VIN = 5.0V. TA = 25C. Bold values indicate -40C TA 85C. Pa rame te r Sy mbo l C on di tio n Input Voltage Range VIN Total Quiescent Current (No Load) IIN Shutdown Supply Current IIN VSHDN = VIN = 5.5V 1 10 A Undervoltage Lockout VUVLO High threshold, VIN increasing 2.85 3.00 V Typ 3.0 Ma x 5.5 10 Low threshold, VIN decreasing Enable Input Voltage Logic Mi n VEN Enable regulator (5V) Enable regulator (3.3V) 2.65 Uni ts V mA 2.75 V 3 V 2.4 V Disable regulator (3.3V/5V) 0.8 V 1 A Shutdown Input Current ISHDN VSHDN = GND or 5.5V Over-Temperature Thermal Shutdown TOTS TJ increasing (disable regulator) 150 C TJ decreasing (enable regulator) 120 C Switching Frequency fSW 1 MHz Output Voltage Tolerance VOUT 1 % 0.2 % VOUT = 1.5V IOUT = 0.5A to 5.0A 0.5 % VOUT = 0.8V IOUT = 5A (without external filter) 10.5 mA pk-pk 50.0 mV pk-pk 6.0 mV RMS 11.0 mV pk-pk IOUT = 5A Line Regulation VIN = 3.0V to 5.5V Load Regulation Input Current Ripple IIN ripple Input Voltage Ripple VIN ripple Output Voltage Noise VIN = 5.0V VOUT = 1.8V IOUT = 5.0A Electr ical Material Rating Flammability Rating UL94V-0 Material Type FR4-PCB Doc. No. MV-S102822-00, Rev. B Page 18 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Electrical Specifications Electrical Characteristics Table 5: LDO Output Electrical Characteristics Pa rame ter Line Regulation LDO Symbol Condi tion Min IOUT = 10 mA to 800 mA Copyright (c) 2006 Marvell April 4, 2006, Advance Max Units IOUT = 800 mA VIN = -4.0V to 5.5V Load Regulation LDO Typ 0.2 % 0.5 % Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 19 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology 3.4 Startup Waveforms Start-up Using the Enable Pin Turn Off Using the Enable Pin VOUT_LDO 2V/DIV VOUT_LDO 2V/DIV VOUT_BUCK 1V/DIV VOUT_BUCK 1V/DIV Enable 2V/DIV Enable 2V/DIV 1 ms/DIV VIN = 5.0V 1 ms/DIV tDLY ~ 4 ms VIN = 5.0V VLDO = 3.3V VLDO = 3.3V VBUCK = 1.2V VBUCK = 1.2V ILOAD = No Load ILOAD = No Load Enable Threshold at VIN = 3.0V Enable Threshold at VIN = 5.0V 1V/DIV VOUT_BUCK 1V/DIV VOUT_BUCK 2V/DIV Enable 2V/DIV Enable 10 ms/DIV VIN = 3.0V 10 ms/DIV VTH = 1.47V (Note) VIN = 5.0V VLDO = 3.3V VLDO = 3.3V VBUCK = 1.2V VBUCK = 1.2V ILOAD = No Load ILOAD = No Load VTH = 2.33V (Note) NOTE: There is a delay (3.5 ms typ) before the output voltage turns on. The actual threshold is before delay. Doc. No. MV-S102822-00, Rev. B Page 20 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Electrical Specifications Startup Waveforms VIN Soft Start VIN Hot Plug VOUT_LDO 2V/DIV VOUT_BUCK 1V/DIV VIN 5V/DIV VLDO 2V/DIV VBUCK 1V/DIV 2V/DIV VIN 2 ms/DIV VIN = 5.0V 1 ms/DIV LDO Start = 1.7V VIN = 5.0V VLDO = 3.3V VLDO = 3.3V VBUCK = 1.2V VBUCK = 1.2V ILOAD = No Load ILOAD = No Load Buck Rise Time tDLY = 4 ms LDO Rise Time VOUT_BUCK 1V/DIV _ VOUT_LDO 1V/DIV 3.3V 2A/DIV I_L _ 20 s/DIV VIN = 5V VOUT= 3.3V 50 s/DIV tRISE = 75 s VIN = 5.0V tRISE = 100 s VLDO= 3.3V ILOAD = 7.5A Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 21 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Soft Start Current Limit UVLO Threshold VOUT_BUCK _ 1V/DIV _ 2A/DIV I_L VIN _ 50 s/DIV VIN = 5.0V 200mV/DIV 100 ms/DIV ILIMIT = 7.5A VLDO= 3.3V VHTH = 2.966V VLDO = 3.3V VBUCK = 1.2V VLTH = 2.792V VBUCK = 1.2V ILOAD = No Load Output Current (Amps) Temperature Derating 6 5 4 Still Air 100 LFM 3 2 1 0 25 35 45 55 65 75 85 Temperature (Degree C) Doc. No. MV-S102822-00, Rev. B Page 22 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Electrical Specifications Load Transient Response Waveforms 3.5 Load Transient Response Waveforms Load Transient Response VOUT ILOAD Double-Pulsed Load Response _ 100mV/DIV _ 1A/DIV VOUT 100mV/DIV _ ILOAD 1A/DIV _ 20 s/DIV 20 s/DIV VIN = 5.0V ILOAD = 0.5A to 5A VIN = 5.0V ILOAD = 0.5A to 5A VBUCK = 1.0V tRISE = 11 A/s VOUT = 1.0V tRISE = 11 A/s tFALL= 176 A/s tFALL= 176 A/s Rise Time Fall Time VSW 5V/DIV VOUT 100mV/DIV ILOAD 1A/DIV VOUT 100mV/DIV ILOAD 1A/DIV 20 s/DIV 20 s/DIV VIN = 5.0V ILOAD = 0.5A to 5A VIN = 5.0V ILOAD = 0.5A to 5A VBUCK = 1.0V tRISE = 11 A/s VBUCK = 1.0V tRISE = 11 A/s tFALL= 176 A/s Copyright (c) 2006 Marvell April 4, 2006, Advance tFALL= 176 A/s Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 23 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology 3.6 Thermal Shutdown G75 Lower Thermal Shutdown G75 Upper Thermal Shutdown VOUT_BUCK 1V/DIV VOUT_BUCK _ 1V/DIV 2 _100C/DIV 100C/DIV _ TA TA 5 5 ms/DIV 5 ms/DIV VIN = 5.0V ILOAD = 5.0A VIN = 5.0V ILOAD = 5.0A VBUCK = 1.2V LTH = 107.65 C VBUCK = 1.2V UTH = 150.68 C 3.7 Switching Waveforms PWM mode DCM Mode VSW 2V/DIV I_L 1A/DIV VOUT 20 MHz 5mV/DIV VIN 100mV/DIV VSW 2V/DIV __ _ _ 20mV/DIV VOUT _ I_L 5 s/DIV 500 ns/DIV VIN = 5.0V VIN(PK-PK) = 110 mV VIN = 5.0V IIND(PK) = 1.33A VBUCK = 1.5V IIND(PK-PK) = 1.5A VBUCK = 1.5V Freq = 105 KHz IOUT = 5A IIND(PK) = 5.87A IOUT = 50 mA VOUT(PK-PK) = 7.62 mV Freq = 950 KHz VOUT(PK-PK) = 3. mV Doc. No. MV-S102822-00, Rev. B Page 24 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance 1A/DIV Electrical Specifications Switching Waveforms PWM Mode Output Ripple VOUT 20 MHz DCM Mode VSW _ 2V/DIV VOUT _ 20mV/DIV I_L _ 1A/DIV 10mV/DIV 10 ms/DIV VIN = 5.0V 500 ns/DIV VOUT(PK-PK) = 9.79.mV VIN = 5.0V VLDO = 3.3V VLDO = 3.3V VBUCK = 1.5V VBUCK = 1.5V ILOAD = 5.0A ILOAD = 50 mV Freq Ringing = 5.09 MHz NOTE: For repeatability of measuring output ripple (VOUT(P-P)), the test procedure is to set the scope bandwidth to 20 MHz and use a coax cable with very short leads terminated into 50. The coax leads must be routed as far as possible from the switching node. Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 25 88MG875z-x/88MG876-x 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology 3.8 Efficiency EFFICIENCY VS. OUTPUT CURRENT V I N = 5.0V @ 2 5 C 100 Efficiency (%) 90 80 3.3V 2.5V 1.8V 1.2V 1.0V 0.8V 70 60 50 0 1 2 3 4 5 4 5 Output Current (A) EFFICIENCY VS. OUTPUT CURRENT V I N = 3.3V @ 2 5 C Efficiency (%) 100 90 80 3.3V 2.5V 1.8V 1.2V 1.0V 0.8V 70 60 50 0 1 2 3 Output Current (A) Doc. No. MV-S102822-00, Rev. B Page 26 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Mechanical Drawings Mechanical Drawings for 88MG875z-x Section 4. Mechanical Drawings 4.1 Mechanical Drawings for 88MG875z-x Figure 12: 88MG875z-S Mechanical Dimensions (SIP Package) PCB 0.047(1.19)MAX. 11-O 0.0287(0.71) 1 2 3 4 5 6 7 8 9 10 11 12 0.025(0.64) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) Top View Copyright (c) 2006 Marvell April 4, 2006, Advance Side View Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 27 88MG875z-x/88MG876-x Series 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Figure 13: 88MG875z-D Mechanical Dimensions (DIP Package) ( 3. 18) 1 9 2 8 3 ( 3. 18) 0. 495( 12. 57) ( 3. 18) PCB 4 5 6 ( 1. 52) PI N( 9X) ROUND 7 9- O0. 046( 1. 17) Top View Doc. No. MV-S102822-00, Rev. B Page 28 Side View Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Mechanical Drawings Mechanical Drawings for 88MG875z-x Figure 14: 88MG875z-T Mechanical Dimensions (SMT Package) 0.150(3.81) 1.104(28.04) 0.060(1.52) 0.984(25.00) 2 8 (3.18) 9 (3.18) 0.125 1 PCB 0.059(1.51) 0.125 3 (3.18) 0.495(12.57) 0.125 9X Rect 0.079(2.0)by 0.099(2.52)PAD Bottom Layer 4 0.197(5.00) 5 6 0.354(9.00) 7 9X Dia 0.079(2.0)PAD Top Layer For test point only TOP VIEW Copyright (c) 2006 Marvell April 4, 2006, Advance 0.032(0.81) SIDE VIEW Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 29 88MG875z-x/88MG876-x Series 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology 4.2 Mechanical Drawings for 88MG876-x Figure 15: 88MG876-S Mechanical Dimensions (SIP Package) 0. 150( 3. 81) 0. 032( 0. 81) PCB 0. 047( 1. 19) MAX. 10- O0. 0287( 0. 71) 2 3 4 5 6 7 8 9 10 11 0. 158( 4. 01) 1 ( 2. 16) ( 2. 16) ( 2. 16) ( 2. 16) ( 2. 16) ( 2. 16) ( 2. 16) ( 2. 16) 0. 025( 0. 64) Top View Side View Doc. No. MV-S102822-00, Rev. B Page 30 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Mechanical Drawings Mechanical Drawings for 88MG876-x Figure 16: 88MG876-D Mechanical Dimensions (DIP Package) 0.870(22.10) 0.060(1.52) 0.250(6.36) (3.18) 7 0.125 0.060(1.51) (3.18) 3 4 5 0.125 0.125 (3.18) 2 6 0.125 (3.18) 0.125 P C B 8 1 0.495(12.57) 0.215(5.46) 0.750(19.06) 8- O0.046(1.17) (3.18) Side View Top View Figure 17: 88MG876-T Mechanical Dimensions (SMT Package) 0.150(3.81) 0.870(22.10) 0.060(1.52) 0.750(19.06) 8X Rect 0.079(2.0) by 0.099(2.52)PAD Bottom Layer PCB 0.060(1.51) 0.250(6.36) 7 3 4 5 6 0.125 0.125 (3.18) 2 (3.18) 0.125 (3.18) 1 0.125 (3.18) 0.495(12.57) 8 0.125 (3.18) 8X Dia 0.079(2.0)PAD Top Layer For test point only TOP VIEW Copyright (c) 2006 Marvell April 4, 2006, Advance 0.032(0.81) SIDE VIEW Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 31 88MG875z-x/88MG876-x Series 5A Rated Output Current, Non-Isolated, Step-Down Switching Regulator Module with AnyVoltageTM Technology Section 5. Ordering Information 5.1 Ordering Part Numbers and Package Markings Figure 18 shows the typical ordering part numbering scheme for the MDS-G76 part. Markings for the other variants are similar. For complete ordering information, contact your Marvell FAE or sales representative. Figure 18: 88MG875z Sample Ordering Part Number 88MG875zA0-x Package Code Part Number Voltage Option LDO Internal Marvell Code B = 3.3V, E = 2.5V Figure 19: 88MG876 Sample Ordering Part Number 88MG876 -A0-x Package Code Part Number Internal Marvell Code Doc. No. MV-S102822-00, Rev. B Page 32 Copyright (c) 2006 Marvell Document Classification: Proprietary Information April 4, 2006, Advance Ordering Information Ordering Part Numbers and Package Markings The standard ordering part number for the respective solution is shown in Table 6. Table 6: Ordering Part Numbers P art Nu mbe r S w i tc he r O ut p ut Vo ltag e LDO Ou tpu t Vol ta ge Rated Ou tpu t Cur rent Ambie nt Te mper atur e Range 1 Packa ge 88MG875B-S Programmable 3.3V 5A -40C to 85C 12-pin SIP 88MG875B-D Programmable 3.3V 5A -40C to 85C 9-pin DIP 88MG875B-T Programmable 3.3V 5A -40C to 85C 9-pin SMT 88MG875E-S Programmable 2.5V 5A -40C to 85C 12-pin SIP 88MG875E-D Programmable 2.5V 5A -40C to 85C 9-pin DIP 88MG875E-T Programmable 2.5V 5A -40C to 85C 9-pin SMT 88MG876-S Programmable -- 5A -40C to 85C 11-pin SIP 88MG876-D Programmable -- 5A -40C to 85C 8-pin DIP 88MG876-T Programmable -- 5A -40C to 85C 8-pin SMT 1. Any specifications that pertains to the operating temperature range -40C to 85C are assured by design, characterization, and correlation with statistical process controls. Figure 20 shows a typical package marking and pin 1 location for the 88MG876 part. Markings for the other variants are similar. Figure 20: 88MG876 Package Marking Package Code G76-X Part Number YWW$ Lot Code Work week Last digit of year Copyright (c) 2006 Marvell April 4, 2006, Advance Doc. No. MV-S102822-00, Rev. B Document Classification: Proprietary Information Page 33 Marvell Semiconductor, Inc. 5488 Marvell Lane Santa Clara, CA 95054, USA Tel: 1.408.222.2500 Fax: 1.408.752.9028 www.marvell.com Worldwide Corporate Offices Worldwide Sales Offices Marvell Semiconductor, Inc. 5488 Marvell Lane Santa Clara, CA 95054, USA Tel: 1.408.222.2500 Western US Marvell 5488 Marvell Lane Santa Clara, CA 95054, USA Tel: 1.408.222.2500 Fax: 1.408.752.9028 Sales Fax: 1.408.752.9029 Marvell Asia Pte, Ltd. 151 Lorong Chuan, #02-05 New Tech Park, Singapore 556741 Tel: 65.6756.1600 Fax: 65.6756.7600 Marvell Japan K.K. Shinjuku Center Bldg. 44F 1-25-1, Nishi-Shinjuku, Shinjuku-ku Tokyo 163-0644, Japan Tel: 81.(0).3.5324.0355 Fax: 81.(0).3.5324.0354 Marvell Semiconductor Israel, Ltd. 6 Hamada Street Mordot HaCarmel Industrial Park Yokneam 20692, Israel Tel: 972.(0).4.909.1500 Fax: 972.(0).4.909.1501 Marvell Semiconductor Korea, Ltd. Rm. 603, Trade Center 159-2 Samsung-Dong, Kangnam-Ku Seoul 135-731, Korea Tel: 82.(0).2.551-6070/6079 Fax: 82.(0).2.551.6080 Radlan Computer Communications, Ltd. Atidim Technological Park, Bldg. #4 Tel Aviv 61131, Israel Tel: 972.(0).3.645.8555 Fax: 972.(0).3.645.8544 For more information, visit our website at: www.marvell.com China Marvell 5J1, 1800 Zhongshan West Road Shanghai, PRC 200233 Tel: 86.21.6440.1350 Fax: 86.21.6440.0799 Central US Marvell 9600 North MoPac Drive, Suite #215 Austin, TX 78759, USA Tel: 1.512.343.0593 Fax: 1.512.340.9970 Marvell Rm. 1102/1103, Jintian Fudi Mansion #9 An Ning Zhuang West Rd. Qing He, Haidian District Beijing, PRC 100085 Tel: 86.10.8274.3831 Fax: 86.10.8274.3830 Eastern US/Canada Marvell Parlee Office Park 1 Meeting House Road, Suite 1 Chelmsford, MA 01824 , USA Tel: 1.978.250.0588 Fax: 1.978.250.0589 Japan Marvell Shinjuku Center Bldg. 44F 1-25-1, Nishi-Shinjuku, Shinjuku-ku Tokyo 163-0644, Japan Tel: 81.(0).3.5324.0355 Fax: 81.(0).3.5324.0354 Europe Marvell 5 Marchmont Gate Boundary Way Hemel Hempstead Hertfordshire, HP2 7BF United Kingdom Tel: 44.(0).1442.211668 Fax: 44.(0).1442.211543 Taiwan Marvell 2Fl., No.1, Alley 20, Lane 407, Sec. 2 Ti-Ding Blvd., Nei Hu District Taipei, Taiwan, 114, R.O.C Tel: 886.(0).2.8177.7071 Fax: 886.(0).2.8752.5707 Israel Marvell 6 Hamada Street Mordot HaCarmel Industrial Park Yokneam 20692, Israel Tel: 972.(0).4.909.1500 Fax: 972.(0).4.909.1501 Korea Marvell Rm. 603, Trade Center 159-2 Samsung-Dong, Kangnam-Ku Seoul 135-731, Korea Tel: 82.(0).2.551-6070/6079 Fax: 82.(0).2.551.6080