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NCV891334 Datasheet(PDF) 5 Page - ON Semiconductor |
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NCV891334 Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 11 page NCV891234, NCV891334 www.onsemi.com 5 Table 3. ELECTRICAL CHARACTERISTICS VIN = 4.5 to 28 V, VEN = 5 V, VBST = VSW + 3 V, CDRV = 0.1 mF, for typical values TJ = 25°C, min/max values are valid for TJ = −40°C to 150 °C unless noted otherwise, and are guaranteed by test, design or statistical correlation (Notes 4, 5) Parameter Unit Max Typ Min Symbol Test Conditions SLOPE COMPENSATION Ramp Slope (With respect to switch current) 4.5 < VIN < 18 V 20 V < VIN < 28V Sramp Sramp(HV) 1.45 0.65 2.0 1.0 2.8 1.3 A/ ms LOW POWER LINEAR REGULATOR Line Regulation IOUT = 5 mA, 6 V < VIN < 18 V VREG(line) 5 25 mV Load Regulation VIN = 13.2 V, 0.1 mA < IOUT < 50 mA VREG(load) 5 35 mV Power Supply Rejection VOUT(ripple) = 0.5 Vp−p, F = 100 Hz PSRR 65 dB Current Limit ILIN(lim) 50 80 mA Output clamp current VOUT = VOUTreg(typ) + 10% ICL(OUT) 0.5 1.0 1.5 mA SHORT CIRCUIT DETECTOR Switching frequency in short−circuit condi- tion Analog Foldback Analog foldback – high VIN Hiccup Mode VOUT = 0 V, 4.5 V < VIN < 18 V VOUT = 0 V, 20 V < VIN < 28 V FSWAF FSWAFHV FSWHIC 450 225 24 550 275 32 650 325 40 kHz RESET Leakage current into RSTB pin 1 mA Output voltage threshold at which the RSTB signal goes low VOUT decreasing 5.0 V option 3.3 V option VRESET 4.50 2.97 4.625 3.05 4.75 3.14 V Hysteresis on RSTB threshold VOUT increasing 5.0 V option 3.3 V option VREShys 25 17 60 40 100 66 mV Noise−filtering delay From VOUT < VRESET to RSTB pin going low tfilter 10 25 ms Restart Delay time From VOUT > VRESET + VREShys to high RSTB tdelay 14 16 18 ms Low RSTB voltage RRSTBpullup = VOUTreg/1 mA, VOUT > 1 V VRSTBlow 0.4 V GATE VOLTAGE SUPPLY (DRV pin) Output Voltage VDRV 3.1 3.3 3.5 V DRV UVLO START Threshold VDRVSTT 2.7 2.9 3.05 V DRV UVLO STOP Threshold VDRVSTP 2.5 2.8 3.0 V DRV UVLO Hysteresis VDRVHYS 50 200 mV DRV Current Limit VDRV = 0 V IDRVLIM 21 50 mA VIN OVERVOLTAGE SHUTDOWN MONITOR Overvoltage Stop Threshold VIN increasing VOVSTP 36.5 37.7 39.0 V Overvoltage Start Threshold VIN decreasing VOVSTT 36.0 37.3 38.8 V Overvoltage Hysteresis VOVHY 0.25 0.40 0.50 V ENABLE (EN) Logic low threshold voltage VENlow 0.8 V Logic high threshold voltage VENhigh 2 V EN pin input current IENbias 0.2 1 mA 4. Refer to ABSOLUTE MAXIMUM RATINGS and APPLICATION INFORMATION for Safe Operating Area. 5. Performance guaranteed over the indicated operating temperature range by design and/or characterization tested at TJ = TA = 25°C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. |
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