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PT6472 Datasheet(PDF) 2 Page - Texas Instruments |
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PT6472 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 14 page For technical support and more information, see inside back cover or visit www.ti.com PT6470 Series 14-A 3.3-V Input Adjustable Integrated Switching Regulator Specifications (Unless otherwise stated, Ta =25 °C, Vin =3.3 V, Cin =470 µF, Cout =0 µF, and Io =Iomax) PT6470 SERIES Characteristics Symbols Conditions Min Typ Max Units Output Current Io Vin =3.3 V 0 — 14 A Input Voltage Range Vin Over Io range 2.95 — 3.65 V Set-Point Voltage Tolerance Vo tol — — ±2 %Vo Temperature Variation ∆Regtemp –40 °C <Ta < +85 °C — ±0.5 — %Vo Line Regulation ∆Regline Over Vin range — ±10 — mV Load Regulation ∆Regload Over Io range — ±12 — mV Total Output Variation ∆Regtot Includes set-point, line, load, ——±3 %Vo –40 °C ≤ Ta ≤ +85 °C Efficiency η Io =10 A PT6472 (2.5 V) — 93 — PT6473 (2.0 V) — 92 — PT6474 (1.8 V) — 91 — % PT6475 (1.5 V) — 89 — PT6476 (1.2 V) — 87 — PT6477 (1.0 V) — 85 — Vo Ripple (pk-pk) Vr 20MHz bandwidth— 20 — mVpp Transient Response 1 A/µs load step, 50 to 100 % Iomax, Cout =330 µF ttr Recovery Time — 50 — µSec ∆Vtr Vo over/undershoot — 100 — mV Over-Current Threshold ITRIP Reset, followed by auto-recovery — 27.5 — A Output Voltage Adjust Vo adj — ±15 (1) (2) —% Switching Frequency ƒs Over Vin and Io ranges — 300 — kHz Inhibit Control (pin1) Referenced to GND (pins 5–8) Input High Voltage VIH Vin –0.5 — Open (3) V Input Low Voltage VIL –0.2 — 0.8 Input Low Current IIL Pin 1 to GND — –10 — µA Inhibit Input Current Iin inhibit Pin 1 to GND — 10 — mA External Input Capacitance Cin 470 (4) ——µF External Output Capacitance Cout 0 330 (5) (6) 3,300 µF Operating Temperature Range Ta Over Vin range –40 (6) — 85 (7) °C Solder Reflow Temperature Treflow Surface temperature of module pins or case — — 215 (8) °C Storage Temperature Ts — –40 — 125 °C Reliability MTBF Per Bellcore TR-332 8.0 — — 106 Hrs 50 % stress, Ta =40 °C, ground benign Mechanical Shock Mil-STD-883D, Method 2002.3 — 500 — G’s Half Sine, mounted to a fixture Mechanical Vibration Mil-STD-883D, Method 2007.2, Suffix N 20 20-2000 Hz, PCB mounted Suffixes A, C — 20 (9) —G’s Weight — — — 10 — grams Flammability — Materials meet UL 94V-0 Notes: (1) This is a typical value. For the adjustment limits of a specific model consult the related application note on output voltage adjustment. (2) The output voltage of the PT6472 (2.5 V) should not be adjusted higher than 2.5 V. (3) The Inhibit control (pin 1) has an internal pull-up, and if left open-circuit the module will operate when input power is applied. A small low-leakage (<100 nA) MOSFET is recommended to control this input. See application notes for more information. (4) A 470 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimumm of 0.7 Arms of ripple current. (5) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response. (6) For operation below 0 °C, COUT must have stable characteristics. Use either low-ESR tantalum or Oscon® type capacitors. (7) See SOA curves or consult factory for the appropriate derating. (8) During solder reflow of SMD package version do not elevate the module case, pins, or internal component temperature above a peak of 215 °C. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products,” (SLTA051). (9) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing. SLTS180A - JANUARY 2003 - REVISED JUNE 2003 |
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