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TPS56221 Datasheet(PDF) 3 Page - Texas Instruments |
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TPS56221 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 25 page TPS56221 www.ti.com SLUSAH5 – MARCH 2011 ELECTRICAL CHARACTERISTICS UNIT PARAMETER TEST CONDITIONS MIN TYP MAX S 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, non-switching 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 VSS Soft-start voltage level – Start of ramp 0.4 0.8 1.3 V BP REGULATOR VBP Output voltage IBP = 10 mA 6.2 6.5 6.8 V VDO Regulator dropout voltage, VVDD – VBP IBP = 25 mA, VVDD = 4.5 V 70 125 mV 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 GBWP (1) Gain bandwidth product 10 24 MHz AOL (1) Open loop gain 60 dB Input bias current (current out of FB IIB VFB = 0.6 V 75 nA pin) IEAOP Output source current VFB = 0 V 1.5 mA IEAOM Output sink current VFB = 1 V 1.5 mA (1) Ensured by design. Not production tested Copyright © 2011, Texas Instruments Incorporated 3 Product Folder Link(s) :TPS56221 |
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