 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| For assistance or to order, call (800) 531-5782 PT7777 Series 32 AMP HIGH-PERFORMANCE "SLEDGE HAMMER" PROGRAMMABLE ISR Revised 7/31/98 The PT7777 is a new series of high-performance, 32 Amp Integrated Switching Regulators (ISRs) housed in a 27-pin SIP package. The 32A capability allows easy integration of the latest high-speed, low-voltage Ps, ASICs, DSPs, and bus drivers into existing 5V systems. The output voltage of the PT7777 can be easily programmed from 1.3V to 3.5V with a 5 bit input compatible with Intel's Pentium(R) Pro Processor. A differential remote sense is also provided which automatically compensates for any voltage drop from the ISR to the load. 680F of output capacitance is required for proper operation. Pin-Out Information Standard Application PROGRAMMING PINS VID0 VID1 VID2 VID3 VID4 REMOTE SENSE (+) 64321 26 VIN L1 7 - 11 1H + 27 PT7777 13 - 19 5 12 20 - 25 VOUT CIN SYNC OUT GND STBY* COUT + LOAD GND REMOTE SENSE (-) Pin Function 1 VID0 2 VID1 3 VID2 4 VID3 5 STBY*- Stand-by 6 VID4 7 V in 8 V in 9 V in 10 V in 11 V in 12 Remote Sense Gnd 13 GND C in = Required 2400F electrolytic Cout = Required 680F electrolytic L1 = Optional 1H input choke Pin Function 14 GND 15 GND 16 GND 17 GND 18 GND 19 GND 20 V out 21 V out 22 V out 23 V out 24 V out 25 V out 26 Remote Sense Vout 27 Sync Out For STBY* pin; open = output enabled; ground = output disabled. Specifications Characteristics (T a = 25C unless noted) Output Current Input Voltage Range Output Voltage Tolerance Line Regulation Load Regulation V o Ripple/Noise pk-pk Transient Response with Cout = 680F Efficiency Switching Frequency Absolute Maximum Operating Temperature Range Recommended Operating Temperature Range Storage Temperature Weight PT7777 SERIES Symbols Io Vin Vo Reg line Reg load Vn t tr Vos o Ta Ta Ts -- Conditions Ta = +60C, 200 LFM, pkg N Ta = +25C, natural convection 0.1A Io 32A Vin = +5V, Io = 32A 0C Ta +55C 4.5V Vin 5.5V, Io = 32A Vin = +5V, 0.1 Io 32A Vin = +5V, Io = 32A Io step between 16A and 32A Vo over/undershoot Vin = +5V, Io = 20A, Vo = 3.3V 4.5V Vin 5.5V 0.1A Io 32A -- Forced Air Flow = 200 LFM Over Vin and Io Ranges -- Vertical/Horizontal Min 0.1 (1) 0.1 (1) 4.5 (2) Vo-0.03 -- -- -- -- -- -- 650 0 0 -40 -- Typ -- -- -- -- 10 10 50 100 200 90 700 -- -- -- 53/66 Max 32 26 5.5 Vo+0.03 -- -- -- -- -- -- 750 +85 +65 +125 -- Units A A V V mV mV mV Sec mV % kHz C C C grams (1) ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected. (2) The minimum input voltage is 4.5V or Vout+1.2V, whichever is greater. Output Capacitors: The PT7777 series requires a minimum output capacitance of 680F for proper operation. Do not use Oscon type capacitors. The maximum allowable output capacitance is 30,000F. Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1H. The input capacitance must be rated for a minimum of 2.6Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com For assistance or to order, call (800) 531-5782 PT7777 Features * +5V input * 5-bit Programmable: 1.3V to 3.5V@32A * High Efficiency * Input Voltage Range: 4.5V to 5.5V * Differential Remote Sense * 27-pin SIP Package Series Programming Information 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 PT7777t = 1.3 to 3.5 Volts t For dimensions and PC board layout, see Package Style 1020 and 1030 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 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 PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount N A 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. CHARACTERISTIC DATA Efficiency vs Output Current (@Vout=+3.3V) 100 Safe Operating Area (@Vin=+5V, Vout=+3.3V, Pkg N) 90 Temperatur emperature Ambient Temperatur e (C) 80 Efficiency (%) 90 Vin 4.5V 5.0V 5.5V 70 Recommended Maximum Operating Temperature Airflow Nat. Conv 60 LFM 120 LFM 200 LFM 60 80 50 40 70 30 60 0 4 8 12 16 20 24 28 32 20 0 4 8 12 16 20 24 28 32 Output Current (A) Output Current (A) Note: SOA curves represent operating conditions at which internal components are at or below manufacturer's maximum rated operating temperatures. Power Dissipation vs Output Current (@Vout=+3.3V) 20 18 16 14 12 10 8 6 4 2 0 0 4 8 12 16 20 24 28 32 Vin 4.5V 5.0V 5.5V (Watts) Pd (Watts) Output Current (A) Output Ripple vs Output Current (@Vout=+3.3V) 40 35 30 Vin 4.5V 5.0V 5.5V Ripple (mVpp) 25 20 15 10 5 0 0 4 8 12 16 20 24 28 32 Output Current (A) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof. Copyright (c) 1999, Texas Instruments Incorporated |
Price & Availability of SLTS056
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |