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PT7681N Datasheet(PDF) 3 Page - Texas Instruments |
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PT7681N Datasheet(HTML) 3 Page - Texas Instruments |
3 / 12 page For technical support and more information, see inside back cover or visit www.ti.com PT7681—5V Typical Characteristics Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =1,500µF, Cout =330µF, Vo =3.3V, and Io =Iomax) PT7681 Characteristics Symbols Conditions Min Typ Max Units Output Current Io Ta = 60°C, 200LFM, pkg N 0 — 30 A Ta = 25°C, Natural convection 0 — 29 Input Voltage Range Vin Over Io range 4.5 — 5.5 V Set-Point Voltage Tolerance Vo tol All output voltages — ±10 ±25 (1) mV Temperature Variation Regtemp –40°C =Ta =+85°C, Io =Iomin — ±1 — %Vo Line Regulation Regline Over Vin range — ±5 — mV Load Regulation Regload Over Io range — ±5 — mV Total Output Voltage Variation . Vo tol Includes set-point, line, load, — ±1.5 ±3 %Vo –40°C =Ta =+85°C Efficiency . Io =15A Vo =3.3V — 93 — Vo =2.5V — 92 — % Vo =1.8V — 89 — Io =30A Vo =3.3V — 90 — Vo =2.5V — 87 — % Vo =1.8V — 83 — Vo Ripple (pk-pk) Vr 20MHz bandwidth — 40 — mVpp Transient Response ttr 1A/µs load step, 50% and 100% Iomax — 25 — µSec Vos Vo over/undershoot — ±200 (2) —mV Over-Current Threshold ITRIP Reset followed by auto-recovery — 38 — A Output Margin Adjust Vo adj Pin 6 or 26 connected to pin 12 — ±5 — % Switching Frequency ƒs Over Vin range 250 300 350 kHz STBY* Input Requirements Input High Voltage VIH Referenced to GND 2.0 — Open (3) V Input Low Voltage VIL -0.2 — 0.8 Input Low Current IIL Pin 5 to GND — 0.3 — mA Standby Input Current Iin standby Pin 5 to GND — 6 — mA External Capacitance Cout 330 (4) — 15,000 µF Operating Temperature Range Ta Over Vin Range –40 — 85 (5) °C Solder Reflow Temperature Treflow Surface temperature of module pins or case — — 215 (6) °C Storage Temperature Ts — –40 — 125 °C Mechanical Shock — Per Mil-STD-883D, Method 2002.3 — 500 — G’s 1 msec, Half Sine, mounted to a fixture Mechanical Vibration — Mil-STD-883D, Method 2007.2 Suffix A — 20 (7) — G’s 20-2000 Hz Suffixes N,C — TBD (7) — Weight — Vertical/Horizontal — 36 — grams Flammability — Materials meet UL 94V-0 Notes: (1) If the remote sense ground is not used, pin 12 must be connected to pin 13 for optimum output voltage accuracy. (2) The transient response may be improved by placing additional capacitors with low equivalent series resistance (ESR) on the output. (3) The STBY* control (pin 5) has an internal pull-up. If it is left open-circuit, the module will operate when input power is applied. A low-leakage (<1µA) MOSFET must be used to control this pin. The open-circuit voltage may be as high as Vin. (4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (5) See safe Operating Area curves or consult factory for the appropriate derating. (6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak of 215°C. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Products,” (SLTA051). (7) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing. External Capacitors: The regulator require a minimum output capacitance of 330µF for proper operation. An input capacitance of 1500µF is also required. This must be rated for a minimum of 1.1Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For further informa- tion 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 30ADC with a typical value of 1µH. 30-A Programmable ISR With Margin Up/Down Controls SLTS177 B - DECEMBER 2002 - REVISED JULY 2006 |
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