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UCC38503NG4 Datasheet(PDF) 4 Page - Texas Instruments |
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UCC38503NG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 35 page UCC28500, UCC28501, UCC28502, UCC28503 UCC38500, UCC38501, UCC38502, UCC38503 SLUS419C − AUGUST 1999 − REVISED NOVEMBER 2001 4 www.ti.com electrical characteristics TA = 0°C to 70°C for the UCC3850X, –40°C to 85°C for the UCC2850X, TA = TJ, VCC = 12 V, RT = 22 kΩ, CT = 330 pF (unless otherwise noted) voltage reference PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input voltage TA = 0°C to 70°C 7.387 7.500 7.613 V Input voltage TA = –40°C to 85°C 7.35 7.50 7.65 V Load regulation IREF = −1 mA to −2 mA, See Note 2 0 10 mV Line regulation VCC = 10.8 V to 15 V, See Note 3 0 10 mV Short circuit current VREF = 0V −20 –25 −50 mA oscillator PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Frequency, initial accuracy TA = 25°C 85 100 115 kHz Frequency, voltage stability VCC = 10.8 V to 15 V −1% 1% Frequency, total variation Line, Temp 80 120 kHz Ramp peak voltage 4.5 5 5.5 V Ramp amplitude voltage (peak to peak) 3.5 4 4.5 V peak current limit PARAMETER TEST CONDITIONS MIN TYP MAX UNITS PKLMT reference voltage –15 0 15 mV PKLMT propagation delay 150 300 500 ns multiplier PARAMETER TEST CONDITIONS MIN TYP MAX UNITS IMOUT, high-line low-power output current IAC = 500 µA, VFF = 4.7 V, VAOUT = 1.25 V, 0 °C ≤ TA ≤ 85°C 0 –6 −20 IMOUT, high-line low-power output current IAC = 500 µA, VFF = 4.7 V, VAOUT = 1.25 V, –40 °C ≤ TA ≤ 85°C 0 –6 −23 A IMOUT, high-line high-power output current IAC = 500 µA, VFF = 4.7 V, VAOUT = 5 V −70 –90 −105 µA IMOUT, low-line low-power output current IAC = 150 µA, VFF = 1.4 V, VAOUT = 1.25 V −10 –19 −50 IMOUT, low-line high-power output current IAC = 150 µA, VFF = 1.4 V, VAOUT = 5 V −268 –300 −345 IMOUT, IAC-limited output current IAC = 150 µA, VFF = 1.3 V, VAOUT = 5 V −250 –300 −400 Gain constant (K) IAC = 300 µA, VFF = 2.8 V, VAOUT = 2.5 V 0.5 1 1.5 1/V IAC = 150 µA, VFF = 1.4 V, VAOUT = 0.25 V 0 –2 1/V IAC = 500 µA, VFF = 4.7 V, VAOUT = 0.25 V 0 –2 µA IMOUT, zero current IAC = 500 µA, VFF = 4.7 V, VAOUT = 0.5 V, 0 °C ≤ TA ≤ 85°C 0 –3 µA IAC = 500 µA, VFF = 4.7 V, VAOUT = 0.5 V, −40 °C ≤ TA ≤ 85°C 0 –3.5 µA Power limit (IMOUT × VFF) IAC = 150 µA, VFF = 1.4 V, VAOUT = 5 V −375 –420 −485 µW zero power PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Zero power comparator threshold Measured on VAOUT 0.175 0.330 0.500 V NOTES: 1. Ensured by design. Not production tested. 2. See Figure 6 for reference variation. 3. See Figure 5 for reference variation for VCC < 10.8 V . |
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