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TPS56221 Datasheet(PDF) 5 Page - Texas Instruments |
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TPS56221 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 32 page TPS56221 www.ti.com SLUSAH5C – MARCH 2011 – REVISED JANUARY 2015 6.4 Thermal Information TPS56221 THERMAL METRIC(1) PQFN UNIT 22 PINS RθJA Junction-to-ambient thermal resistance 34.6 RθJC(top) Junction-to-case (top) thermal resistance 22.9 ψJT Junction-to-top characterization parameter 0.6 °C/W ψJB Junction-to-board characterization parameter 5.0 RθJC(bot) Junction-to-case (bottom) thermal resistance 0.3 (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 6.5 Electrical Characteristics –40°C ≤ TJ ≤ 125°C, VVDD = 12 V, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VOLTAGE REFERENCE TJ = 25°C, 4.5 V ≤ VVDD ≤ 14 V 597 600 603 VFB FB input voltage mV –40°C ≤ TJ ≤ 125°C, 594 600 606 4.5 V ≤ VVDD ≤ 14 V INPUT SUPPLY VVDD Input supply voltage range 4.5 14 V IVDDSD Shutdown supply current VEN/SS = 0.2 V 80 120 µA IVDDQ Quiescent, nonswitching Let EN/SS float, VFB = 1 V 2.5 5.0 mA VUVLO UVLO ON Voltage 4.0 4.3 V VUVLO(HYS) UVLO hysteresis 500 700 mV ENABLE/SOFT-START VIH High-level input voltage, EN/SS 0.55 0.70 1.00 V VIL Low-level input voltage, EN/SS 0.27 0.30 0.33 V ISS Soft-start source current 8 10 12 µA Soft-start voltage level – start of VSS 0.4 0.8 1.3 V ramp BP REGULATOR VBP Output voltage IBP = 10 mA 6.2 6.5 6.8 V Regulator dropout voltage, VVDD – VDO IBP = 25 mA, VVDD = 4.5 V 70 125 mV VBP OSCILLATOR RCOMP = 40.2 kΩ, 270 300 330 kHz 4.5 V ≤ VVDD ≤ 14 V RCOMP = open, fSW Switching frequency 450 500 550 kHz 4.5 V ≤ VVDD ≤ 14 V RCOMP = 13.3 kΩ, 0.8 0.95 1.1 MHz 4.5 V ≤ VVDD ≤ 14 V VRAMP (1) Ramp amplitude VVDD/6.6 VVDD/6 VVDD/5.4 V PWM fsw = 300 kHz, VFB = 0 V, 93% 4.5 V ≤ VVDD ≤ 14 V fsw = 500 kHz, VFB = 0 V, DMAX (1) Maximum duty cycle 90% 4.5 V ≤ VVDD ≤ 14 V fsw = 1 MHz, VFB = 0 V, 85% 4.5 V ≤ VVDD ≤ 14 V tON(min) (1) Minimum controllable pulse width 100 ns ERROR AMPLIFIER (1) Ensured by design. Not production tested Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS56221 |
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