PT7709A

PT7709—5V 20 Amp Programmable Next Generation “Big Hammer” SLTS084 (Revised 6/30/2000) Description The PT7709 is a next generation “Big Hammer”, high-performance Integrated Switching Regulator (ISR), which is made available in Power Trends’ aluminum 27-pin SIP package. The PT7709 improves on the popular PT7705 with 20A of output current and short circuit protection. The PT7709 is suitable for existing 5V system designs that require power for the latest high-speed, low- voltage µPs, and bus drivers. The PT7709 output is programmable from 1.3V to 3.5V with a 5-bit input, which is compatible with the Intel Pentium Processor. A differential remote sense is also provided to compensate for voltage drop between the ISR and load. Only 330µF of output capacitance are required for proper operation. Pin-Out Information Standard Application PROGRAMMING PINS VID0 VID1 VID2 VID3 VID4 REMOTE SENSE (+) 6 4 3 2 1 V IN 7-11 PT7709 Vin 1 H + SYNC OUT STBY Synch Out 5 27 C IN 26 SNS(+) VID4 - VID0 L1 GND 13-19 Vo VOUT 20-25 SNS(-) + 12 LOAD COUT GND GND Pin Function Pin Function Pin Function 1 VID0 10 Vin 19 GND 2 3 VID1 VID2 11 12 Vin 20 21 Vout Vout 4 5 VID3 STBY* - Stand-by 13 14 GND GND 22 23 Vout Vout 6 7 VID4 Vin 15 16 GND GND 24 25 Vout Vout 8 9 Vin Vin 17 18 GND GND 26 27 Sync Out REMOTE SENSE ( ) STBY* Cin = Required 1500µF electrolytic Cout= Required 330µF electrolytic L1 = Optional 1µH input choke Remote Sense Gnd (4) Remote Sense Vout For STBY* pin: open = output enabled ground = output disabled. Specifications PT7709 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Ta = +60°C, 200 LFM, pkg N Ta = +25°C, natural convection 0.1 (1) 0.1 (1) — — 20 20 A A Input Voltage Range Vin 0.1A ≤ Io ≤ 20A 4.5 — 5.5 V Output Voltage Tolerance ∆Vo Vin = +5V, Io = 20A 0°C ≤ Ta ≤ +65°C Vo-0.03 — Vo+0.03 V Line Regulation Regline 4.5V ≤ Vin ≤ 5.5V, Io = 20A — ±10 — mV Load Regulation Regload Vin = +5V, 0.1 ≤ I o ≤ 20A — ±10 — mV Vo Ripple/Noise Vn Vin = +5V, Io = 20A — 50 — mV Transient Response with Cout = 330µF ttr Vos Io step between 10A and 20A Vo over/undershoot — — 50 100 — — µSec mV Efficiency η Vin = +5V, Io = 10A Vo = 3.3V Vo = 2.5V Vo = 1.8V — — — 92 90 87 — — — % % % Vin = +5V, Io = 20A Vo = 3.3V Vo = 2.5V Vo = 1.8V — — — 90 87 82 — — — % % % 350 400 kHz — +85 (3) °C Switching Frequency ƒo 4.5V ≤ Vin ≤ 5.5V 0.1A ≤ Io ≤ 20A 300 Absolute Maximum Operating Temperature Range Ta Over Vin –40 Storage Temperature Ts and Io Ranges (2) — –40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 1 msec, Half Sine, mounted to a fixture — 500 — G’s Mechanical Vibration Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board — 10 — G’s Vertical/Horizontal — 31/41 — grams Weight Notes: (1) (2) (3) (4) — ISR-will operate down to no load with reduced specifications. For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. See Safe Operating Area curves or contact the factory for the appropriate derating. If the Remote Sense Ground is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy. External Capacitors: The PT7709 requires a minimum output capacitance of 330µF for proper operation. The PT7709 also requires an input capacitance of 1500µF, which must be rated for a minimum of 1.4Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For more information refer to the application note regarding capacitor selection for this product. Input Filter: An input filter inductor is optional for most applications. The inductor must be sized to handle 20ADC with a typical value of 1µH. For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT7709—5V 20 Amp Programmable Next Generation “Big Hammer” Features Programming Information • Single-Device: +5V input • 5-bit Programmable: 1.3V to 3.5V@20A • High Efficiency • Differential Remote Sense • Short-Circuit Protection • Parallelable with PT7743 20A “Current Booster” VID3 VID2 VID1 VID0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Ordering Information PT7709❏ ❏ = 1.3 to 3.5 Volts VID4=1 VID4=0 Vout Vout 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V (For dimensions and PC board layout, see Package Styles 800 and 810.) 1.30V 1.35V 1.40V 1.45V 1.50V 1.55V 1.60V 1.65V 1.70V 1.75V 1.80V 1.85V 1.90V 1.95V 2.00V 2.05V PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C 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. T Y P I C A L PT7709 Performance, Vo = 3.3 VDC C H A R A C T E R I S T I C S Safe Operating Area Curves (See Note A) (See Note B) VIN =5.0V, Vo =3.3 VDC Efficiency vs Output Current 100 90.0 Efficiency - % VOUT 80 3.3V 2.5V 1.8V 70 60 Ambient Temperature ( C) 80.0 90 70.0 Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 30.0 50 20.0 0 4 8 12 16 20 0.0 5.0 Iout (A) 10.0 15.0 20.0 Iout (A) VIN =5.0V, Vo =1.8 VDC Ripple vs Output Current 50 90.0 Ripple - mV VOUT 30 3.3V 2.5V 1.8V 20 10 Ambient Temperature ( C) 80.0 40 70.0 Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 30.0 0 20.0 0 4 8 12 16 20 0.0 Iout (A) 4.0 8.0 12.0 16.0 20.0 Iout (A) Power Dissipation vs Output Current 10 8 Pd - Watts VOUT 6 1.8V 2.5V 3.3V 4 2 0 0 4 8 12 16 20 Iout (A) Note A: All data in the above graphs has been developed from actual products tested at 25°C. The data is considered typical for the ISR Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes PT7708/PT7709, PT7742/PT7743 Capacitor Recommendations for the PT7708/09 Regulators and PT7742/43 Current Boosters Input Capacitors The recommended input capacitance is determined by 1.4 ampere minimum ripple current rating and 1500µF minimum capacitance. Capacitors listed below must be rated for a minimum of 2x the input voltage with +5V operation. Ripple current and ≤100mΩ Equivalent Series Resistance (ESR) values are the major considerations along with temperature when selecting the proper capacitor. Output Capacitors The minimum required output capacitance is 330µF with a maximum ESR less than or equal to 100mΩ. Failure to observe this requirement may lead to regulator instability or oscillation. Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz, but excellent low frequency transient response. Above the ripple frequency ceramic decoupling capacitors are necessary to improve the transient response and reduce any microprocessor high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in the Table 1 below. Tantalum Characteristics Tantalum capacitors with a minimum 10V rating are recommended on the output bus, but only the AVX TPS Series, Sprague 594/595 Series, or Kemet T495/T510 Series. The AVX TPS Series, Sprague Series or Kemet Series capacitors are specified over other types due to their higher surge current, excellent power dissipation and ripple current ratings. As an example, the TAJ Series by AVX is not recommended. This series exhibits considerably higher ESR, reduced power dissipation and lower ripple current capability. The TAJ Series is a less reliable compared to the TPS series when determining power dissipation capability. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The suggested minimum quantities per regulator for both the input and output buses are identified. This is not an extensive capacitor list. The table below is a selection guide for input and output capacitors. Other capacitor vendors are available with comparable RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz). These critical parameters are necessary to insure both optimum regulator performance and long capacitor life. Table 1 Capacitors Characteristic Data Capac i t or Vendor/ Ser i es Capac i t or Char ac t e r i s t i c s Qu a n t i t y Working Voltage Value(µF) ( ESR) Equi v al e nt Se r i e s Re s i s t anc e 1 0 5 ° C Ma x i m u m Ri ppl e C u r r e n t ( I r ms ) Phy s i c al S i z e ( mm) I nput Bu s Ou t p u t Bu s Panasonic FC Surface Mtg FA 16V 35V 2200 330 0.038Ω 0.065Ω 2000mA 1205mA 18x16.5 12.5x16.5 1 1 1 EEVFC1C222N EEVFC1V331LQ 10V 16V 680 1800 0.090Ω 0.032Ω 755mA 2000mA 10x12.5 18x15 1 1 1 EEUFA1A681 EEUFA1C182A United Chemi -Con LFVSeries 25V 16V 16V 330 2200 470 0.084Ω 0.038Ω 0.084Ω/2=042Ω 825mA 1630mA 825mA x2 10x16 16x20 10x16 1 1 1 1 LXV25VB331M10X16LL LXV16VB222M16X20LL LXV16VB471M10X16LL Nichicon PL Series PM Series 10V 10V 25V 680 1800 330 0.090Ω 0.044Ω 0.095Ω 770mA 1420mA 750mA 10x15 16x15 10x15 1 1 1 1 UPL1A681MHH6 UPL1A182MHH6 UPL1E331MPH6 Oscon SS SV 10V 10V 330 330 0.025W/4=0.006Ω 0.020/4=0.005Ω >9800mA >9800mA 10x10.5 10.3x12.6 4 4 N/R (Note) AVX Tanatalum TPS- Series 10V 10V 330 330 0.100/5=20Ω 0.060Ω 3500mA 1826mA 7.3Lx 4.3Wx 4.1H 5 5 1 1 TPSV337M010R0100 TPSV337M010R0060 Sprague Tantalum 595D/594D 10V 330 0.045W/4=0.011Ω >4500mA 10V 680 0.090Ω >1660mA 7.3L x 5.7W x 4.0H Kemet Tantalum T510/T495 Series 10V 330 0.035Ω 2000mA 10V 220 0.070Ω/2=0.035Ω >2000mA Sanyo Poscap TPB 10V 220 0.040Ω 3000mA 4.3Wx7.3L x4.0H 7.2L x 4.3W x 3.1H Note: (N/R) is not recommended for this application, due to extremely low Equivalent Series Resistance (ESR) For technical support and more information, see inside back cover or visit www.ti.com/powertrends Vendor Number 10SS330M 10SV330M(Sufvace Mtg 5 1 2 1 594D337X0010R2T Surface Mount 595D687X0010R2T 5 1 510X337M010AS 6 2 T495X227M010AS Surface Mount 6 2 10TPB220M Surface Mount PACKAGE OPTION ADDENDUM www.ti.com 24-Jul-2010 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) PT7709A NRND SIP MODULE EHA 27 TBD Call TI Call TI Samples Not Available PT7709C NRND SIP MODULE EHC 27 TBD Call TI Call TI Samples Not Available PT7709N NRND SIP MODULE EHD 27 TBD Call TI Level-1-215C-UNLIM Samples Not Available 10 (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. 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