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ACT4921 Datenblatt(PDF) 9 Page - Qorvo, Inc |
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ACT4921 Datenblatt(HTML) 9 Page - Qorvo, Inc |
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9 / 35 page ![]() Data Sheet Rev. B, January 2020 | Subject to change without notice 9 of 35 www.qorvo.com © 2020 Qorvo US, Inc. All rights reserved. ACT4921 Power Loss Protection with 6A eFuse INTERNAL BUCK REGULATOR (VIN = 5V, TA = 25°C, unless otherwise specified) PARAMETER CONDITIONS MIN TYP MAX UNIT Operating Input Voltage Range 3 28 V Typical Output Voltage 3.3 V Programmable Output Voltage Range Using external resistor divider 1.8 6 V Standby Supply Current VOUT = 103%, Regulator Enabled, No Load, not switching 300 450 600 µA Feedback Voltage 0.8 V Output Voltage Accuracy VOUT = 3.3V, IOUT = 2A (continuous PWM mode) -1% VNOM 1% V VOUT = 3.3V, IOUT = 1mA (PFM mode) Average Ripple Voltage -1% VNOM 1% V Line Regulation VOUT = 3.3V VIN_B1 = 5.5V to 12V, PWM Regulation 0.02 %/V Load Regulation VOUT = 3.3V PWM Regulation 0.04 %/A Undervoltage Threshold VOUT Falling BUCK_UV_TH = 00 BUCK_UV_TH = 01 BUCK_UV_TH = 10 BUCK_UV_TH = 11 60 70 80 90 %VNOM Power Good Threshold (PG_VO) VOUT Falling 95 %VNOM Power Good Hysteresis (PG_VO) VOUT Rising 2 %VNOM Overvoltage Fault Threshold VOUT Rising 107 110 112.5 %VNOM Overvoltage Fault Hysteresis VOUT Falling 3 %VNOM Programmable Switching Frequency Range VOUT > 20% VNOM 562 kHz 1125 1500 2250 Current Limit, Cycle-by-Cycle Settings BKILIM_OPT = 0 BKILIM_OPT = 1 3 6 A Current Limit, Cycle-by-Cycle Tolerance At default BKILIM_OPT -10 +10 % At other BKILIM_OPT set point -15 +15 % Current Limit, Shutdown Above BKILIM_OPT threshold 40 % High Side On-Resistance ISW = -3A, VSTR = 5V 46 mΩ Low Side On-Resistance ISW = 3A, VSTR = 5V 32 mΩ SW Leakage Current VSTR = 5V, VSW = 0 or 3.3V 1 µA |
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