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PT8121N Datasheet(PDF) 5 Page - Texas Instruments |
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PT8121N Datasheet(HTML) 5 Page - Texas Instruments |
5 / 11 page For technical support and more information, see inside back cover or visit www.ti.com PT8120 Series 30-A 12-V Input Programmable Integrated Switching Regulator PT8124 Specifications (Unless otherwise stated Ta =25°C, Cin =1,500µF, Cout =660µF, Vin =12V, & Io = Iomax ) PT8124 Only Characteristics Symbols Conditions Min Typ Max Units Output Current Io Natural convection or 0.1 (1) —30 A 60°C with 200LFM airflow Input Voltage Range Vin Over Io Range 10.8 — 13.2 V Set-Point Voltage Tolerance Vo tol Over Vo range, Io =0.5A — ±1 ±2 %V Line Regulation ∆Regline Over Vin range — ±10 — mV Load Regulation (Droop) ∆Regload Over Io range — 2 — mV/A Temperature Variation ∆Regtemp –40°C ≤Ta ≤85°C, , Io =0.5A — ±0.5 — %Vo Total Output Voltage Variation ∆Votot Includes set-point, line, load — — 85 (2) mV –40°C ≤Ta ≤ 85°C Efficiency η Io =15A Vo =1.8V — 86 — Vo =1.5V — 84 — % Vo =1.2V — 81 — Io =Iomax Vo =1.8V — 84 — Vo =1.5V — 82 — % Vo =1.2V — 78 — Vo Ripple (pk-pk) Vr 20MHz bandwidth — 20 — mV Transient Response ttr 1A/µs load step, 50% to 100% Iomax — 50 — µSec ∆Vtr Vo over/undershoot — 50 — mV Over-Current Threshold ITRIP Reset followed by auto-recovery — 47 — A Switching Frequency ƒs Over load range 300 350 400 kHz Standby Control (pin 6) Referenced to GND (pins 17–22) Input High Voltage VIH — — Open (3) V Input Low Voltage VIL -0.2 — 0.8 Input Low Current IIL Pin 6 to GND — 0.5 — mA Standby Input Current Iin standby Pin 6 to GND — 35 — mA External Output Capacitance Cout See PT8124 application schematic 660 (4) — 30,000 µF External Input Capacitance Cin See PT8124 application schematic 1,500 — — µF Operating Temperature Range Ta Over Vin Range –40 (5) —+85 (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 — 20 (7) — G’s 20-2000 Hz, soldered in PCB Weight — Vertical/Horizontal — 55 — grams Flammability — Materials meet UL 94V-0 Notes: (1) ISR-will operate down to no load with reduced specifications. (2) Total output voltage variation includes load regulation droop, which is required for compliance with specification VRM 8.5-4 (3) The Standby input (pin 6) has an internal pull-up. If it is left open-circuit the PT812x will operate when input power is applied. A low-leakage MOSFET is recommended to control this input. The open-circuit voltage is nominally 5V. See application notes for interface considerations. (4) The PT8120 regulators require a minimum of 660µF, low ESR ouput capacitance (1,200µF for standard aluminum electrolytic) for proper operation. (5) For operation below 0°C, Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (6) See safe Operating Area curves or consult factory for the appropriate derating. (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. Input Filter: An input filter inductor is optional for most applications. The inductor must be rated to handle the projected input current. A rating of 10ADC for Vout ≤3.3V, and 15ADC for Vout ≥4.5V is recommended. The input capacitance must be rated for a minimum of 1.6Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. For more information consult the application note on capacitor selection. |
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