PT7748

PT7720_13 TI1 | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 8

Technical content

Features

• +12V Bus Input
• 5-bit Programmable: 1.3V to 3.5V or 4.5V to 7.6V
• High Efficiency
• Differential Remote Sense
• 27-pin SIP Package
• Parallelable with PT7748 17A current booster Pin Function

1 VID0

2 VID1

3 VID2

4 VID3

5 STBY #

6 VID4

10 Vin

11 Vin

12 Sense Gnd

13 GND

14 GND

Description

The PT7720 series is a +12-V input, 17-A output, high-performance Integrated Switching Regulator (ISR), housed in a 27-pin SIP package. The 17A capability allows easy integration of the latest high- speed, low-voltage microprocessors and bus drivers into +12V power systems. The output voltage is programmable using a 5-bit code. The output voltage range and code for the PT7721 is com- patible with Intel’s Pentium II processor. The PT7720 series has been designed to work in parallel with one or more of the PT7748 current boosters, allowing the output load current capacity to be increased in increments of 17A. A differential remote sense is provided to compensate for voltage drop between the ISR to the load. A 1200µF of output capacitance is required for proper operation. PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code * Vertical N (EJE) Horizontal A (EJF) SMD C (EJG) * Previously known as package styles 1000/ 1010. (Reference the applicable package code drawing for the dimensions and PC board layout)

Ordering Information

PT7721/G72= 1.3 to 3.5 Volts PT7722/G72= 4.5 to 7.6 Volts PT7748/G72= 17-A Booster 17A, 12-V Input “Big-Hammer II” Programmable ISR PT7720 Series SLTS048B (Revised 5/21/2002) PT7720 7 - 11 13 - 19 20 - 25 VIN GND 1µH GND V OUT C OUT +C IN + 12 261 SYNC OUT LOAD REMOTE SENSE (+) REMOTE SENSE (-) VID1 VID2 VID3 VID4 PROGRAMMING PINS 234 STBY* VID0 Cin = Required 560µF electrolytic (See input filter note) Cout= Required 1200µF electrolytic L1 = Optional 1µH input choke Pin Function

15 GND

16 GND

17 GND

18 GND

19 GND

20 Vout

21 Vout

22 Vout

23 Vout

24 Vout

25 Vout

26 Sense Vout

27 Sync Out

# For further information, see application notes. Pin-Out Information — Not Recommended for New Designs —

For technical support and more information, see inside back cover or visit www.ti.com

17 A, 12-V Input “Big-Hammer II”

VID4=1 VID4=0 VID4=1 VID4=0 VID3 VID2 VID1 VID0 Vout Vout Vout Vout 1 1 1 1 2.0V 1.30V 4.5V 6.1V 1 1 1 0 2.1V 1.35V 4.6V 6.2V 1 1 0 1 2.2V 1.40V 4.7V 6.3V 1 1 0 0 2.3V 1.45V 4.8V 6.4V 1 0 1 1 2.4V 1.50V 4.9V 6.5V 1 0 1 0 2.5V 1.55V 5.0V 6.6V 1 0 0 1 2.6V 1.60V 5.1V 6.7V 1 0 0 0 2.7V 1.65V 5.2V 6.8V 0 1 1 1 2.8V 1.70V 5.3V 6.9V 0 1 1 0 2.9V 1.75V 5.4V 7.0V 0 1 0 1 3.0V 1.80V 5.5V 7.1V 0 1 0 0 3.1V 1.85V 5.6V 7.2V 0 0 1 1 3.2V 1.90V 5.7V 7.3V 0 0 1 0 3.3V 1.95V 5.8V 7.4V 0 0 0 1 3.4V 2.00V 5.9V 7.5V 0 0 0 0 3.5V 2.05V 6.0V 7.6V Logic 0 = Pin 12 potential (remote sense gnd) Logic 1 = Open circuit (no pull-up resistors) VID3 and VID4 may not be changed while the unit is operating. Specifications (Unless otherwise stated, Ta =25°C, Vin =12V, Cin =560µF, Cout =1200µF, and Io =Iomax) PT7720 SERIES Characteristics Symbols Conditions Min Typ Max Units Output Current I o Ta = +60°C, 200 LFM, pkg N, V o ≤5V 0.1 (1) — 17 (2) ATa = +25°C, natural convection, V o ≤5V 0.1 (1) — 17 (2) Output Power P o Ta = +60°C, 200 LFM, pkg N, V o ≥5V — — 85 WTa = +25°C, natural convection, V o ≥5V — — 85 Input Voltage Range V in 0.1A ≤ Io ≤ 17A 11.0 — 14.0 V Output Voltage Tolerance ∆ Vo 0°C ≤ Ta ≤ +60°C (PT7721) V o–0.03 — V o+0.03 V Line Regulation Reg line 11V ≤ Vin ≤ 14V (with remote sense) — ±5 ±10 mV Load Regulation Reg load 0.1 ≤ Io ≤ 17A (with remote sense) — ±5 ±10 mV Vo Ripple/Noise V n (PT7721) — 50 — mVpp(PT7722) — 100 — Transient Response t tr Io step between 7.5A and 15A — 100 — µSec with Cout = 1200µF V os Vo over/undershoot — 200 — mV Efficiency η Io = 10A V o =5.0V — 90 — Vo = 1.5V — 78 — Switching Frequency ƒ s 11V ≤ Vin ≤ 14V 300 350 400 kHz0.1A ≤ Io ≤ 17A Operating Temperature Range T a —0 — + 8 5 (3) °C Storage Temperature T s — -40 — +125 °C Mechanical Shock Per Mil -STD-883D, Method 2002.3 , 1 msec, — TBD — G’sHalf Sine, mounted to a fixture Mechanical Vibration Per Mil-STD-883D, Method 2007.2, — TBD — G’s20-2000 Hz, Soldered in a PC board Weight — Vertical — 53 — gramsHorizontal — 66 — Notes: (1) The ISR will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected. (2) The PT7720 series can be easily paralleled with one or more of the PT7748 Current Boosters to provide increased output current in increments of 17A. (3) See Safe Operating Area curves or contact the factory for the appropriate derating. Output Capacitors: The PT7720 series requires a minimum output capacitance of 1200µF for proper operation. Do not use Oscon type capacitors. The maximum allow- able output capacitance is (57,000 ÷ Vout)µF, or 15,000µF, whichever is less. Input Filter: An input inductor is optional for most applications. The input inductor must be sized to handle 7ADC with a typical value of 1µ H. The input capacitance must be rated for a minimum of 4 Arms of ripple current when operated at maximum output current and maximum output voltage. Con tact an applications specialist for input capacitor selection for applications at other output voltages and output currents.

For technical support and more information, see inside back cover or visit www.ti.com Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures Typical Characteristics 02468 1 0 1 2 1 4 1 6 1 8 2 0 5.0V 3.3V 2.5V 1.5V Efficiency vs Output Current Efficiency (%) Output Current (A) PT7721, Vout=+3.3V, Pkg N) Output Current (A) Ambient Temperature ( °C) Airflow 0 2 4 6 8 10 12 14 16 18 20 5.0V 3.3V 2.5V 1.5V 02468 1 0 1 2 1 4 1 6 1 8 2 0 5.0V 3.3V 2.5V 1.5V Output Ripple vs Output Current Power Dissipation vs Output Current Output Current (A) Output Current (Amps) Ripple (mVpp)Pd (Watts) PT7722, Vout=+5.0V, Pkg N) Output Current (A) Ambient Temperature ( °C) Airflow Vout Vout Vout 0 2 4 6 8 1 01 21 41 61 82 0 200LFM 120LFM 60LFM Nat conv 02468 1 0 1 2 1 4 1 6 1 8 2 0 200LFM 120LFM 60LFM Nat conv Safe Operating Area, Vin=+12V (See Note B)PT7721/PT7722 @Vin =12V (See Note A)

For technical support and more information, see inside back cover or visit www.ti.com Application Notes Using the PT7748 17-A Current Booster with the PT7720 Series Programmable ISRs The PT7748 is a 17-A “Current Booster” module for the PT7720 series of regulators. The booster is controlled directly by the regulator, and effectively adds a parallel output stage. This allows the system to run sychronously, providing a low noise solution. Up to four booster modules can be connected to a single regulator. Each booster increases the available output current by 17A. Combinations of a regulator and booster modules can supply power for virtually any multi-processor application. A current booster is not a stand-alone product, and can only operate with a regulator. It is housed in the same package as its compatible regulator, and shares the same mechanical outline. Except for an increase in output current, the overall performance of a PT7720 regulator/booster combination is identi- cal to that of a stand-alone regulator. Refer to the appropriate data sheet for the performance speci- fications. PT7721/22, PT7748 Figure 1-1; Current Booster Application Schematic PT7748 PT7720 7 - 11 13 - 19 20 - 25 GND GND VOUT 261 REMOTE SENSE (+) REMOTE SENSE (-) VID0 VID1 VID2 VID3 PROGRAMMING PINS 234 STBY* C IN C IN C OUT C OUT LOAD 7 - 11 20 - 25 13 - 19 1µH Lin 1µH Lin VIN 6VID4 To Additional Boosters Table 1-1; PT7748 Pin-Out Information Pin Function Pin Function Pin Function

1 No Connect 10 V in 19 GND

2 No Connect 11 V in 20 Vout

3 No Connect 12 No Connect 21 V out

4 No Connect 13 GND 22 V out

5 No Connect 14 GND 23 V out

6 No Connect 15 GND 24 V out

8V in 17 GND 26 No Connect 9V in 18 GND 27 Sync In Notes: 1. Each booster requires the same amount of input and output capacitance as recommended for a stand-alone regulator. See the Standard Application schematic and the respective input/output filter notes in the PT7720 product data sheet. 2. The 1-µH filter choke located at the input of each regulator and booster module (L in) is optional for most applications. If specified, each inductor must be sized to handle 7ADC at full output load. 3. The pin-out of the current booster modules include a number pins identified, “No Connect” (see Table 1). These pins are not connected internally to the module but must be soldered to a pad to preserve the unit’s mechanical integrity. 4. A similar PCB footprint and trace layout between the regulator and each booster will facilitate current sharing between all modules.

For technical support and more information, see inside back cover or visit www.ti.com PT7720 Series Pin-Coded Output Voltage Adjustment on the “Big Hammer II” Series ISRs Power Trends PT7720 series ISRs incorporate pin-coded voltage control to adjust the ouput voltage. The control pins are identified VID0 - VID4 (pins 1, 2, 3, 4, & 6) respectively. When the control pins are left open-circuit, the ISR will regulate at its factory trimmed output voltage. Each pin is internally connected to a precision resistor, which when grounded changes the output voltage by a set amount. By selectively grounding VID0-VID4, the output voltage of each ISR in the PT7720 series ISRs can be programmed in incremental steps over its speci- fied output voltage range. The output voltage ranges offered by these regulators provide a convenient method of voltage selection for many applications. In addition, the program code and output voltage range of the PT7721 model is compatible with the voltage ID specification defined by Intel Corporation for voltage regulator modules (VRMs) used to power Pentium® II microprocessors. Refer to Figure 2-1 below for the connection schematic, and the PT7720 Data Sheet for the appropriate pro- gramming code information. Notes: 1. The programming convention is as follows:- Logic 0: Connect to pin12 (Remote Sense Ground). Logic 1: Open circuit/open drain (See notes 2, & 4) 2. Do not connect pull-up resistors to the voltage programming pins. 3. To minimize output voltage error, always use pin 12 (Sense Ground) as the logic “0” reference. While the regular Figure 2-1 ground (pins 13-19) can also be used for programming, doing so will degrade the load reglation of the product. 4. If active devices are used to ground the voltage control pins, low-level open drain MOSFET devices should be used over bipolar transistors. The inherent V ce(sat) in bipolar devices introduces errors in the device’s internal divider network. Discrete transistors such as the BSS138, 2N7002, or the IRLML2402 are examples of appropriate devices. Active Voltage Programming: Special precautions should be taken when making changes to the voltage control progam code while the unit is powered. It is highly recommended that the ISR be either powered down or held in standby. Changes made to the program code while V out is enabled induces high current transients through the device. This is the result of the electrolytic output capacitors being either charged or dis- charged to the new output voltage set-point. The transient current can be minimized by making only incremental changes to the binary code, i.e. one LSB at a time. A minimum of 100µs settling time between each program state is also recommended. Making non-incremental changes to VID3 and VID4 with the output enabled is discouraged. If they are changed, the transients induced can overstress the device resulting in a permanent drop in efficiency. If the use of active devices prevents the program code being asserted prior to power-up, pull pin 5 (STBY) to the device GND during the period that the input voltage is applied to V in. Releasing pin 5 will then allow the device output to execute a soft-start power-up to the programmed voltage. Cout Cin 1µ H (Optional) +12V COM STBY L O A D PT7720 64321 2 6 20-25 125 13-1927 7-11 VoVin GND SNS(+) SNS(-) Synch OutSTBY VID4 - VID0

www.ti.com 6-Jan-2013 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) Samples (Requires Login) PT7722N OBSOLETE SIP MODULE EJE 27 TBD Call TI Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Texas InstrumentsIncorporatedand itssubsidiaries(TI)reservetherighttomake corrections,enhancements,improvementsand other changes toitssemiconductorproductsand servicesperJESD46, latestissue,and todiscontinueany productorserviceperJESD48, latest issue.Buyersshouldobtainthelatestrelevantinformationbeforeplacingordersand shouldverifythatsuch informationiscurrentand complete.Allsemiconductorproducts(alsoreferredtohereinas “components”)aresoldsubjecttoTI’s termsand conditionsofsale suppliedatthetimeoforderacknowledgment. TIwarrantsperformanceofitscomponents tothespecificationsapplicableatthetimeofsale,inaccordancewiththewarrantyinTI’s terms and conditionsofsaleofsemiconductorproducts.Testingand otherqualitycontroltechniquesareused totheextentTIdeems necessary tosupportthiswarranty.Exceptwhere mandated by applicablelaw,testingofallparametersofeach component isnotnecessarily performed. TIassumes no liabilityforapplicationsassistanceorthedesignofBuyers’products.Buyersareresponsiblefortheirproductsand applicationsusingTIcomponents.To minimizetherisksassociatedwithBuyers’productsand applications,Buyersshouldprovide adequatedesignand operatingsafeguards. TIdoes notwarrantorrepresentthatany license,eitherexpressorimplied,isgrantedunderany patentright,copyright,mask work right,or otherintellectualpropertyrightrelatingtoany combination,machine,orprocessinwhichTIcomponents orservicesareused.Information publishedby TIregardingthird-partyproductsorservicesdoes notconstitutea licensetouse such productsorservicesora warrantyor endorsementthereof.Use ofsuch informationmay requirea licensefroma thirdpartyunderthepatentsorotherintellectualpropertyofthe thirdparty,ora licensefromTIunderthepatentsorotherintellectualpropertyofTI. ReproductionofsignificantportionsofTIinformationinTIdatabooks ordatasheetsispermissibleonlyifreproductioniswithoutalteration and isaccompaniedby allassociatedwarranties,conditions,limitations,and notices.TIisnotresponsibleorliableforsuch altered documentation.Informationofthirdpartiesmay be subjecttoadditionalrestrictions. ResaleofTIcomponents orserviceswithstatementsdifferentfromorbeyond theparametersstatedby TIforthatcomponent orservice voidsallexpressand any impliedwarrantiesfortheassociatedTIcomponent orserviceand isan unfairand deceptivebusinesspractice. TIisnotresponsibleorliableforany such statements. Buyeracknowledgesand agreesthatitissolelyresponsibleforcompliancewithalllegal,regulatoryand safety-relatedrequirements concerningitsproducts,and any use ofTIcomponents initsapplications,notwithstandingany applications-relatedinformationorsupport thatmay be providedby TI.Buyerrepresentsand agreesthatithas allthenecessaryexpertisetocreateand implementsafeguardswhich anticipatedangerousconsequencesoffailures,monitorfailuresand theirconsequences,lessenthelikelihoodoffailuresthatmightcause harm and takeappropriateremedialactions.BuyerwillfullyindemnifyTIand itsrepresentativesagainstany damages arisingoutoftheuse ofany TIcomponents insafety-criticalapplications. Insome cases,TIcomponents may be promotedspecificallytofacilitatesafety-relatedapplications.Withsuch components,TI’s goalisto helpenablecustomerstodesignand createtheirown end-productsolutionsthatmeet applicablefunctionalsafetystandardsand requirements.Nonetheless,such components aresubjecttotheseterms. No TIcomponents areauthorizedforuse inFDA ClassIII(orsimilarlife-criticalmedicalequipment)unlessauthorizedofficersoftheparties have executeda specialagreementspecificallygoverningsuch use. OnlythoseTIcomponents whichTIhas specificallydesignatedas militarygradeor“enhanced plastic”aredesignedand intendedforuse in military/aerospaceapplicationsorenvironments.Buyeracknowledgesand agreesthatany militaryoraerospaceuse ofTIcomponents whichhave not been so designatedissolelyattheBuyer's risk,and thatBuyerissolelyresponsibleforcompliancewithalllegaland regulatoryrequirementsinconnectionwithsuch use. TIhas specificallydesignatedcertaincomponents as meetingISO/TS16949 requirements,mainlyforautomotiveuse.Inany case ofuse of non-designatedproducts,TIwillnotbe responsibleforany failuretomeet ISO/TS16949. Products Applications Audio www.ti.com/audio Automotiveand Transportationwww.ti.com/automotive Amplifiers amplifier.ti.com Communicationsand Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP ® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energyand Lighting www.ti.com/energy Clocksand Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space,Avionicsand Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Videoand Imaging www.ti.com/video RFID www.ti-rfid.com OMAP ApplicationsProcessors www.ti.com/omap TIE2E Community e2e.ti.com WirelessConnectivity www.ti.com/wirelessconnectivity MailingAddress:Texas Instruments,PostOfficeBox 655303,Dallas,Texas 75265 Copyright© 2013,Texas InstrumentsIncorporated