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| For assistance or to order, call (800) 531-5782 PT7773 5V 32 AMP HIGH-PERFORMANCE "SLEDGE HAMMER" PROGRAMMABLE ISR Description The PT7773 is one of a 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 PT7773 is programmable over the low voltage range, 0.8V to 3.1V via a 5-bit input. A differential remote sense is also provided, which automatically compensates for any voltage drop between the ISR and load. An output capacitance of 2400F is required for proper operation. SLTS078 (Revised 5/31/2000) Pin-Out Information Standard Application PROGRAMMING PINS VID0 VID1 VID2 VID3 VID4 REMOTE SENSE (+) 64321 26 VIN L1 7 - 11 1H + 27 PT7773 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 Vin 8 Vin 9 Vin 10 Vin 11 Vin 12 Remote Sense Gnd 13 GND C in = Required 2400F electrolytic C out = Required 2400F electrolytic L1 = Optional 1H input choke Pin Function 14 GND 15 GND 16 GND 17 GND 18 GND 19 GND 20 Vout 21 Vout 22 Vout 23 Vout 24 Vout 25 Vout 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 T olerance Line Regulation Load Regulation Vo Ripple/Noise pk-pk Transient Response with Cout = 2400F Efficiency Switching Frequency Absolute Maximum Operating T emperature Range Storage T emperature Weight PT7773 SERIES Symbols Io Vin Vo Regline Regload Vn ttr Vos o 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 I o 32A Vin = +5V, Io = 32A Io step between 16A and 32A Vo over/undershoot Vin = +5V, Io = 20A, Vo = 2.5V 4.5V Vin 5.5V 0.1A Io 32A Over Vin Range -- Vertical/Horizontal Min 0.1 (1) 0.1 (1) 4.5 Vo-0.03 -- -- -- -- -- -- 650 0 -40 -- Typ -- -- -- -- 10 10 50 100 200 86 700 -- -- 53/66 Max 32 26 5.5 Vo+0.03 -- -- -- -- -- -- 750 +85 (2) +125 -- Units A V V mV mV mV Sec mV % kHz C C grams Notes: (1) ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected. (2) See SOA curves or consult the factory for the appropriate derating. Output Capacitors: The PT7773 series requires a minimum output capacitance of 2400F 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.ti.com/powertrends For assistance or to order, call (800) 531-5782 PT7773 Features * +5V input * 5-bit Programmable: 0.8V to 3.1V @32A * High Efficiency * Input Voltage Range: 4.5V to 5.5V * Differential Remote Sense * 27-pin SIP Package 5V 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 PT7773 = 0.8 to 3.1 Volts For dimensions and PC board layout, see Package Style 1020 and 1030 0.80V 0.85V 0.90V 0.95V 1.00V 1.05V 1.10V 1.15V 1.20V 1.25V 1.30V 1.35V 1.40V 1.45V 1.50V 1.55V VID4=1 VID4=0 Vout Vout 1.6V 1.7V 1.8V 1.9V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V 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=+2.5V) (See Note A) 100 Safe Operating Area (@Vin=+5V, Vout=+2.5V, Pkg N) (See Note B) 90 Ambient Temperature (C) 90 80 Efficiency (%) 70 80 70 60 50 40 0 4 8 12 16 20 24 28 32 Airflow 60 Nat. Conv 60 LFM 120 LFM 200 LFM 50 40 30 20 0 4 8 12 16 20 24 28 32 Output Current (A) Output Current (A) Power Dissipation vs Output Current (@Vout=+2.5V) 25 20 Pd (Watts) 15 10 5 0 0 4 8 12 16 20 24 28 32 Output Current (A) Output Ripple vs Output Current (@Vout=+2.5V) 25 20 Ripple (mVpp) 15 10 5 0 0 4 8 12 16 20 24 28 32 Output Current (A) Note A: Characteristic data in the above graphs has been developed from actual products tested at 25C. This 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. Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.ti.com/powertrends 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 acknowledgment, 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. Customers are responsible for their applications using TI components. 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) 2000, Texas Instruments Incorporated |
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