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UC1825-SP Datasheet(PDF) 5 Page - Texas Instruments |
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UC1825-SP Datasheet(HTML) 5 Page - Texas Instruments |
5 / 18 page UC1825-SP www.ti.com SLUS870A – JANUARY 2009 – REVISED MARCH 2012 ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for RT = 3.65 kΩ, CT = 1 nF, VCC = 15 V, –55°C < TA < 125°C, TA = TJ PARAMETERS TEST CONDITIONS MIN TYP MAX UNIT REFERENCE Output voltage TJ = 25°C, IO = 1 mA 5.05 5.10 5.15 V Line regulation 10 V < VCC < 30 V 2 20 mV Load regulation 1 mA < IO < 10 mA 5 20 mV Total output variation Line, load, temperature 5.0 5.2 V Output noise voltage 10 Hz < f < 10 kHz 50 μV Short-circuit current VREF = 0 V –15 –50 –100 mA OSCILLATOR SECTION Initial accuracy TJ = 25°C 360 400 440 kHz Voltage stability 10 V < VCC < 30 V 0.2% 2% Temperature stability TMIN < TA < TMAX 5% 16% Total variation Line, Temperature 340 460 kHz Clock out high 3.9 4.5 V Clock out low 2.3 2.9 V Ramp peak(1) 2.6 2.8 3.0 V Ramp valley(1) 0.7 1.0 1.25 V Ramp valley to peak(1) 1.6 1.8 2.1 V ERROR AMPLIFIER Input offset voltage 10 mV Input bias current 0.6 3 μA Input offset current 0.1 1 μA Open-loop gain 1 V < VO < 4 V 60 95 dB CMRR 1.5 V < VCM < 5.5 V 75 95 dB PSRR 10 V < VCC < 30 V 85 110 dB Output sink current VE/AOut= 1 V 1 2.5 mA Output source current VE/AOut = 4 V –0.5 –1.3 mA Output high voltage IE/AOut = –0.5 mA 4.0 4.7 5.0 V Output low voltage IE/AOut = 1 mA 0 0.5 1.0 V Gain bandwidth product(1) f = 200 kHz 5 10.5 MHz Slew rate(1) 4 9 V/ μs PWM COMPARATOR Ramp bias current VRamp = 0 V –1 –5 μA Duty cycle range 0% 80% E/A out zero dc threshold VRamp = 0 V 1.1 1.25 V Delay to output(1) 50 80 ns SOFT-START Charge current VSoft Start = 0.5 V 3 9 20 μA Discharge current VSoft Start = 1 V 1 mA CURRENT LIMIT/SHUTDOWN Current limit/shutdown bias current 0 < VILIM/SD < 4 V 15 μA Current limit threshold 0.9 1.0 1.1 V Shutdown threshold 1.25 1.40 1.55 V Delay to output(1) 50 80 ns (1) Parameters ensured by design and/or characterization, if not production tested. Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): UC1825-SP |
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