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PT6944A Datasheet(PDF) 2 Page - Texas Instruments |
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PT6944A Datasheet(HTML) 2 Page - Texas Instruments |
2 / 11 page For technical support and more information, see inside back cover or visit www.ti.com PT6940 Series 6-A Dual Output 5-V/3.3-V Input Integrated Switching Regulator General Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =330µF, Co1 =330µF, Co2 =330µF, and Io1/Io2 =Iomax) PT6940 Series Characteristic Symbol Conditions Min Typ Max Units Output Current Io (1) Ta =25°C, natural convection 0.1 (2) —6 A Ta =60°C, 200LFM airflow 0.1(2) —6 Input Voltage Range Vin OverIoRange Vo1 ≤2.5V 3.1 — 5.5 V Vo1 >2.5V 4.5 — 5.5 Set Point Voltage Tolerance Vo tol — ±0.5 ±2 %Vo Temperature Variation Regtemp –40° ≤Ta≤ +85°C, Io =Iomin — ±0.5 — %Vo Line Regulation Regline Over Vin range — ±5 ±10 mV Load Regulation Regload Over Io range — ±5 ±10 mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, Vo =3.3V — ±43 ±100 –40° ≤Ta ≤ +85°C Vo =2.5V — ±35 ±75 Vo =1.8V — ±28 ±54 mV Vo =1.5V — ±25 ±45 Vo =1.2V — ±22 ±36 Efficiency η Vin =5V, Io1 = Io2 =4A PT6941 — 92 — PT6942 — 91 — PT6943 — 90 — % PT6944 — 90 — PT6946 — 89 — PT6947 — 88 — PT6948 — 87 — Vo Ripple (pk-pk) Vr 20MHz bandwidth — 35 — mVpp TransientResponse ttr 1A/µs load step, 50% to 100% Iomax — 60 — µs ∆Vtr Vo over/undershoot — ±70 — mV Short Circuit Threshold Isc(pk) Reset followed by auto-recovery — 13 (3) —A Switching Frequency ƒo Over Vin range 300 350 400 kHz STBY* (Pin 1) Referenced to GND (pin 7) Input High Voltage VIH — — Open (4) V Input Low Voltage VIL –0.1 — +0.4 Input Low Current IIL — -0.5 – mA Quiescent Current Iin standby pin 1 to GND — 10 20 mA External Output Capacitance Both outputs 330 — TBD 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 1msec,½Sine,mounted — TBD — G’s Mechanical Vibration Mil-STD-883D Method 2007.2, Vertical — TBD (7) — G’s 20-2000 Hz Horizontal — TBD (7) — Weight — Vertical/Horizontal — 34 — grams Flammability — MeetsUL94V-O Notes: (1) The outputs, Vo1 and Vo2, have similar characteristics. The applicable performance parameters are defined according to output voltage. (2) The minimum output current applies to each output. The module will operate at no load with reduced specifications. (3) A short-circuit load fault at either output causes the module to continuously reset, affecting both outputs. (4) The STBY* control (pin 1) has an internal pull-up, and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage is approximately the input voltage, Vin. Refer to the application notes for interface considerations. (5) For operating temperatures below 0°C, Cin, Co1, and Co2 must have stable characteristics. Use either tantalum or Oscon® capacitors. (6) See Safe Operating Area curves for the specific output voltage combination, or contact the factory for the appropriate derating. (7) Only the case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing. Input/Output Capacitors: The PT6940 series requires a 330µF electrolytic capacitor at the input and both outputs for proper operation (300µF for Oscon® or low ESR tantalum). In addition, the input capacitance must be rated for a minimum of 1.0Arms ripple current. For transient or dynamic load applications, additional capacitance may be required. Refer to the application notes for more information. Not Recommended For New Designs |
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