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TPS61080DRCR Fiches technique(PDF) 4 Page - Texas Instruments |
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TPS61080DRCR Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 25 page www.ti.com TPS61080 TPS61081 SLVS644B – FEBRUARY 2006 – REVISED JANUARY 2007 ELECTRICAL CHARACTERISTICS (continued) VIN = 3.6 V, EN = VIN, T A = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SOFT START TA = 25°C 4.75 5 5.25 Iss Soft start bias current µA 4.6 5 5.4 Vclp SS pin to FB pin accuracy Vss = 500 mV 487 500 513 mV FEEDBACK FB IFB Feedback input bias current VFB = 1.229 V –100 100 nA VFB Feedback regulation voltage 1.204 1.229 1.254 V POWER SWITCH AND DIODE Isolation MOSFET on-resistance 0.06 0.1 Ω RDS(ON) VIN = VGS = 3.6 V 0.17 0.22 N-channel MOSFET on-resistance Ω VIN = VGS = 2.5 V 0.2 0.32 ILN_NFET N-channel leakage current VDS = 28 V 1 2 µA VF Power diode forward voltage Id = 1 A 0.85 1 V ILN_ISO Isolation FET leakage current L pin to ground 1 µA OC AND SC TPS61080, FSW = High or FSW = Low 0.5 0.7 1.0 ILIM N-Channel MOSFET current limit(1) A TPS61081, FSW = High or FSW = Low 1.3 1.6 2.0 TPS61080 1.0 2.2 ISC Short circuit current limit A TPS61081 2.0 3.5 Tscd Short circuit delay time 13 µs Tscr Short circuit release time 57 ms VSC OUT short detection threshold (2) VIN – VOUT 1.4 V OSCILLATOR FSW pin high 1.0 1.2 1.5 fS Oscillator frequency MHz FSW pin low 0.5 0.6 0.7 Dmax Maximum duty cycle FB = 1.0 V 90% 94% Dmin Minimum duty cycle 5% Rfsw FSW pin pull down resistance 400 800 1600 k Ω FSW high logic 1.6 VFSW V FSW low logic 0.8 OVP Output overvoltage protection Vout rising 27 28 29 V Vovp Output overvoltage protection hysteresis Vout falling 0.7 V THERMAL SHUTDOWN Tshutdown Thermal shutdown threshold 160 °C Thysteresis Thermal shutdown threshold hysteresis 15 °C (1) VIN = 3.6 V, Vout = 15 V, Duty cycle = 76%. See Figure 6 to Figure 9 for other operation conditions. (2) OUT short circuit condition is detected if OUT stays lower than VIN – Vsc for 2 ms after IC enables. 4 Submit Documentation Feedback |
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