PT7771N1

PT7771—5V 32 Amp “Sledge Hammer” Programmable ISR SLTS054A (Revised 6/30/2000) The PT7771 is a high-output Integrated Switching Regulator (ISR) housed in a 27-pin SIP package. The PT7771 operates off a standard 5V bus to provide a 32 amp low-voltage power source for the industry’s latest highspeed µPs, ASICs, DSPs. The PT7771 has been designed to work in parallel with one or more of the PT7746 -32A current boosters to increase the load current capability in increments of 32A. The output voltage is programmable from 1.3V to 3.5V via a 5-bit input, compatible with Intel’s Pentiumâ Pro Processor. A differential remote sense is also provided to compensate for voltage drop between the ISR and load. An output capacitance of 2400µF is required for proper operation. Note that this product does not include short circuit protection. Pin-Out Information Standard Application PROGRAMMING PINS VID0 VID1 VID2 VID3 VID4 VIN REMOTE SENSE (+) 6 4 3 2 1 L1 PT7770 7 - 11 1H C IN + 26 27 13 - 19 5 VOUT 20 - 25 12 C OUT + LOAD SYNC OUT GND GND STBY* REMOTE SENSE (-) Cin = Required 2400µF electrolytic Cout = Required 2400µF electrolytic L1 = Optional 1µH input choke 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 Pin Function 14 GND 15 GND 16 GND 17 GND 18 19 20 21 22 23 24 25 26 27 GND GND Vout Vout Vout Vout Vout Vout Remote Sense Vout Sync Out For STBY* pin; open = output enabled; ground = output disabled. Specifications PT7771 Characteristics (T a = 25°C unless noted) Symbols Conditions Min Output Current Io Ta = +60°C, 200 LFM, pkg N Ta = +25°C, natural convection 0.1 0.1 Input Voltage Range Vin 0.1A ≤ Io ≤ 32A 4.5 Output Voltage Tolerance ∆Vo Vin = +5V, Io = 32A 0°C ≤ Ta ≤ +55°C Line Regulation Regline Load Regulation Regload Vo Ripple/Noise pk-pk Typ Max Units (1) (1) — — 32 26 A A (2) — 5.5 V Vo-0.03 — Vo+0.03 V 4.5V ≤ V in ≤ 5.5V, Io = 32A — ±10 — mV Vin = +5V, 0.1 ≤ I o ≤ 32A — ±10 — mV Vn Vin = +5V, Io = 32A — 50 — mV Transient Response with Cout = 2400µF ttr Vos Io step between 16A and 32A Vo over/undershoot — — 100 200 — — µSec mV Efficiency η Vin = +5V, Io = 20A, V o = 3.3V — 90 — % Switching Frequency ƒo 4.5V ≤ Vin ≤ 5.5V 0.1A ≤ Io ≤ 32A 650 700 750 kHz Absolute Maximum Operating Temperature Range Ta Over Vin Range 0 — +85 Storage Temperature Ts — -40 — +125 °C Weight — Vertical/Horizontal — 53/66 — grams (3) Notes: (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. (3) Consult the SOA curves or contact the factory for the appropriate derating. Output Capacitors: The PT7771 regulator requires a minimum output capacitance of 2400µF for proper operation. Do not use Oscon type capacitors. The maximum allowable output capacitance is 30,000µF. Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 32ADC with a typical value of 1µH. 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. For technical support and more information, see inside back cover or visit www.ti.com/powertrends °C PT7771—5V 32 Amp “Sledge Hammer” Programmable ISR Programming Information Features • +5V input • 5-bit Programmable: 1.3V to 3.5V@32A • High Efficiency • Differential Remote Sense • Parallelable with PT7746 32A “Current Booster” • 27-pin SIP Package 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 PT7771❏ ❏ = 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 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 PT Series Suffix (PT1234X) Case/Pin Configuration N A C Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount 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 PT7771 @Vin =+5V, Vout =3.3V C H A R A C T E R I S T I C S Safe Operating Area Curves (See Note A) Efficiency vs Output Current 100 Vin 4.5V 5.0V 5.5V 80 70 60 0 4 8 12 16 20 24 28 Ambient TTemperature emperature (°C) 90 90 Efficiency (%) (See Note B) PT7771 @Vin =+5V, Vout =3.3V, Pkg N 80 70 Airflow Nat. Conv 60 60 LFM 120 LFM 200 LFM 50 40 30 20 32 0 Output Current (A) 4 8 12 16 20 24 28 32 Output Current (A) Power Dissipation vs Output Current 20 18 16 Vin Pd (W atts) (Watts) 14 12 4.5V 10 5.0V 5.5V 8 6 4 2 0 0 4 8 12 16 20 24 28 32 Output Current (A) Output Ripple vs Output Current 40 35 Ripple (mVpp) 30 Vin 25 4.5V 5.0V 5.5V 20 15 10 5 0 0 4 8 12 16 20 24 28 32 Output Current (A) Note A: All characteristic data in the above graphs has been developed from actual procducts tested at 25°C. This data is considered typical for the ISR. Note B: OA 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 PACKAGE OPTION ADDENDUM www.ti.com 2-Feb-2014 PACKAGING INFORMATION Orderable Device Status (1) PT7771N1 Package Type Package Pins Package Drawing Qty OBSOLETE SIP MODULE EJD 27 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) TBD Call TI Call TI Op Temp (°C) Device Marking (4/5) (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. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. 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