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NCV8855 Datasheet(PDF) 9 Page - ON Semiconductor |
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NCV8855 Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 24 page NCV8855 http://onsemi.com 9 ELECTRICAL CHARACTERISTICS (VIN_SW = VIN = VISNS1+ = VISNS1− = VISNS2+ = VISNS2− = 13.2 V, SYS_EN = LDO_EN = HS_EN = 5 V, VOUT3 = 3.3 V, VOUT4 = 8.5 V, IOUT[1:4] = 0 A) Min/Max values are valid for the temperature range −40°C v TJ v 150°C unless noted otherwise. Min/Max values are guaranteed by test, design or statistical correlation. Parameter Unit Max Typ Min Conditions Symbol SWITCH−MODE POWER SUPPLY REGULATOR (SMPS2, VOUT2) SPECIFICATIONS Internal Soft−start Soft−start time tSS2 SYNC floating 3 5 7 ms Error Amplifier Dc gain (Note 1) 70 85 dB Gain−bandwidth product (Note 1) 8 10 MHz SW_FB2 input bias current SW_FB2 = 0.8 V 100 500 nA Input offset voltage 800 mV Slew rate CCOMP2 = 50 pF, ±1 mA dc load Slew rate within ramp voltage levels (Note 1) 6 8 V/ms COMP2 source current VCOMP2 = 2.2 V 1.5 8 mA VCOMP2 = 3.2 V 1.6 8 mA COMP2 sink current VCOMP2 = 2.2 V 1.1 8 mA VCOMP2 = 1.1 V 0.7 8 mA Minimum COMP2 voltage ICOMP2 = 500 mA 1.05 V Maximum COMP2 voltage ICOMP2 = 2 mA 3.3 V Ramp maximum voltage 2.8 3.0 3.2 V Ramp minimum voltage 1.1 1.2 1.3 V Ramp voltage amplitude VRAMP2 1.6 1.8 2.0 V Duty Cycle Limitations Minimum off time tMINOFF2 SN2 falling to SN2 rising 80 140 200 ns Minimum pulse width tMINON2 SN2 rising to SN2 falling, 120 250 300 ns Switching MOSFET N−channel MOSFET RDS(on) TJ = 25°C, Guaranteed at Probe 300 360 mW Turn−on time SN2 → 0 V to 13.2 V, IOUT = 1 A (inductive load), TJ = 25°C 30 ns Turn−off time SN2 → 13.2 V to 0 V, IOUT = 1 A (inductive load), TJ = 25°C 30 ns LOW DROPOUT LINEAR REGULATOR CONTROLLER (LDO1, VOUT3) SPECIFICATIONS Output Voltage Regulation Output voltage accuracy VLR_FB1 tied to VOUT3 directly, NTD20P06L pass device −2 2 % Output voltage line regulation IOUT3 = 10 mA, 4.5 V v VISNS1+ v 5.5 V, NTD20P06L pass device −0.25 0.01 0.25 % Output voltage load regulation 1 mA v IOUT3 v 500 mA, VISNS1+ = 5 V, NTD20P06L pass device −0.5 0.2 0.5 % Output load capacitance range COUT3 (Note 1) 10 100 mF Output load capacitance ESR range (Note 1) 0.01 5 W Power supply ripple rejection PSRR1 NTD20P06L pass device (Note 1) 60 dB Current Limit Current limit threshold voltage VSNS1 VISNS1+ – VISNS1− 90 110 130 mV 1. Guaranteed by design, not fully tested in production. 2. Indirectly guaranteed by test coverage of other parameters. |
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