PT7701A

For assistance or to order, call (800) 531-5782 PT7700 Series SLTS077 15 AMP HIGH-PERFORMANCE “BIG HAMMER” PROGRAMMABLE ISR The PT7700 is a new series of highperformance, 15 Amp Integrated Switching Regulators (ISRs) housed in a 27-pin SIP package. The 15A capability allows easy integration of the latest high-speed, lowvoltage µPs and bus drivers into existing 5V systems. The PT7700 series has been designed to work in parallel with one or more of the PT7749 - 15A current boosters for increased Iout in increments of 15A. Features Standard Application • Single-Device: +5V input • 4-bit Programmable: 2V to 3.5V@15A or 1.3V to 2V @ 15A output • High Efficiency • Input Voltage Range: 4.5V to 5.5V • Differential Remote Sense • 27-pin SIP Package: Two products are offered in the series with different output voltage ranges that are easily programmed with a 4 bit input compatible with Intel’s Pentium Pro Processor. A differential remote sense is also provided which automatically compensates for any voltage drop from the ISR to the load. An input filter and 1200µF of output capacitance are required for proper operation. Cin = Required 330µF electrolytic (x4) Cout = Required 330µF electrolytic (x4) L1 = Required 1µH input choke PROGRAMMING PINS VID0 VID1 VID2 VID3 REMOTE SENSE (+) 4 3 2 1 L1 VIN 1µH CIN + + + 27 + Ordering Information ❏ = 2 to 3.5 Volts PT7701❏ ❏ = 1.3 to 2 Volts PT7702❏ N = Vertical through-hole A = Horizontal through-hole C = Horizontal surface-mount 26 PT7700 7 - 11 Revised 5/31/00 13 - 19 5 VOUT 20 - 25 12 COUT + + + + LOAD Programming Information PT7701 PT7702 Vout Vout SYNC OUT GND VID3 VID2 VID1 VID0 GND STBY* Remote Sense Vout 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 Sync Out Note: REMOTE SENSE (-) Pin-Out Information V = 1.0”(H) x 3”(L) x 0.55”(W) H = 0.55”(H) x 3”(L) x 1.5”(W) Pin 1 2 3 4 5 6 7 8 9 • Parallelable with PT7749 15A “Current Boosters” Specifications Function VID0 VID1 VID2 VID3 STBY* - Stand-by Vin Vin Vin Vin Pin 10 11 12 13 14 15 16 17 18 Function Pin 19 20 21 22 23 24 25 26 27 Vin Vin Remote Sense Gnd GND GND GND GND GND GND Function GND Vout Vout Vout Vout Vout Vout For STBY* pin; open = output enabled; ground = output disabled. 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 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 Logic 0 = Pin 12 (remote sense gnd) potential Logic 1 = Open circuit (no pull-up resistors) PT7700 SERIES Characteristics (T A = 25°C unless noted) Output Current Symbols Io Conditions 4.5V ≤ Vin ≤ 5.5V Min 0.1 (1) Typ — Max 15 (2) Units ADC Input Voltage Range Vin 0.1A ≤ Io ≤ 15A 4.5 (3) — 5.5 VDC Static Voltage Tolerance Vo Vin = +5V, Io = 15A 0°C ≤ Ta ≤ +55°C Vo - 0.05 — Vo +0.05 VDC Line Regulation Regline 4.5V ≤ Vin ≤ 5.5V, Io = 15A — ±10 — mV Load Regulation Regload Vin = +5V, 0.1 ≤ Io ≤ 15A — ±10 — mV Vo Ripple/Noise pk-pk Vn Vin = +5V, Io = 15A — 50 — mV Transient Response with Cout = 1200µF ttr Vos Io step between 7.5A and 15A Vo over/undershoot — — 100 200 — — µSec mV Efficiency η Vin = +5V, Io = 10A — — — — — 89 87 85 79 77 — — — — — % % % % % Switching Frequency ƒo 4.5V ≤ Vin ≤ 5.5V 0.1A ≤ Io ≤ 15A 650 700 750 kHz Operating Temperature Ta Forced Air Flow = 200 LFM Over Vin and Io Ranges 0 — +55 °C Vo Vo Vo Vo Vo = 3.3V = 2.9V = 2.5V = 1.8V = 1.5V 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 Storage Temperature Ts — -40 — +125 °C Weight — — — TBD — grams Relative Humidity — Non-condensing 0 — 95 % (1) ISR will operate down to no load with reduced specifications Please note that this product is not short-circuit protected. (2) The PT7700 series can be easily paralleled with one or more of the PT7749 slave modules to provide increased output current in increments of 15A. Please contact Power Trends for the appropriate application note. (3) The minimum input voltage is 4.5V or Vout+1.2V, whichever is greater. Output Capacitors: The PT7700 series requires A minimum output capacitance of 1200µF for proper operation. To reduce ESR, Power Trends recommends using four 330µF electrolytic capacitors in parallel. Input Filter: An input filter is required for all applications. The input inductor must be sized to handle 15ADC with a typical value of 1µH. The input capacitance must be rated for 14Arms of ripple current. Power Trends recommends using four Sanyo OSCON style capacitors with a 3.5Arms ripple current rating in parallel (p/n 6SA330M). 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