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AME5269 Datasheet(PDF) 8 Page - Analog Microelectronics |
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AME5269 Datasheet(HTML) 8 Page - Analog Microelectronics |
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8 / 18 page  AME 8 AME5269 Rev. B.01 2A, 28V, 340KHz Synchronous Rectified Step-Down Converter n Electrical Specifications V IN = 12V, TA = 25 OC, unless otherwise noted. Parameter Symbol Min Typ Max Units Shutdown Current ISHDN 1 3.0 µA Supply Current 1.3 1.5 mA Feedback Voltage VFB 0.9 0.925 0.95 V OVP Threshold Voltage 1.10 V Error Amplifier Voltage Gain AEA 400 V/V Error Amplifier Transconductance GEA 800 µA/V High-side Switch On Resistance RDS,ON,HI 135 m Ω Low-side Switch On Resistance RDS,ON,LO 105 m Ω Switch Leakage Current ISW,LK 10 µA High-side Switch Current Limit 2.4 A Low-side Switch Current Limit 1.1 A COMP to Current Sense Transconductance GCS 5.2 A/V 300 340 380 KHz 270 400 KHz Short Circuit Oscillation Frequency fOSC,SCR 116 KHz Maximum Duty Cycle DMAX 90 % Minimum On Time tON,MIN 220 nS 3.8 4.05 4.3 V 3.5 4.7 V Input Undervoltage Lockout Hysteresis VUVLO,HYST 210 mV Soft-Start Current Source ISS 6 µA Soft-Start Period tSS 15 mS 2.2 2.5 2.7 V 2.2 2.7 V EN Shutdown Threshold Voltage 1.1 1.56 2 V EN Shutdown Threshold Voltage Hysteresis 210 mV EN Lockout Hysteresis 210 mV Thermal Shutdown Temperature OTP 160 OC Thermal Shutdown Hysteresis OTH 20 OC Restore, temperature decreasing VSS = 0V CSS = 0.1µF -40 OC≦TA≦+85OC Shutdown, temperature increasing VEN Rising EN Lockout Threshold Voltage VEN TA = 25 OC VFB = 0V Input Undervoltage Lockout VUVLO VIN rising, TA = 25 OC -40 OC≦TA≦+85OC VFB = 0.8V From Drain to Source Current Limit Oscillation Frequency fOSC,CL TA = 25 OC -40 OC≦TA≦+85OC VEN = 0V, VSW = 0V Minimum Duty Cycle ∆IC = ±10µA Test Condition VEN = 0V VEN = 2.0V, VFB = 1.0V 4.75V ≦VIN≦28V |
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