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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MIC2177BWM датащи(PDF) 4 Page - Micrel Semiconductor |
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MIC2177BWM датащи(HTML) 4 Page - Micrel Semiconductor |
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4 / 15 page  Micrel, Inc. MIC2177 April 2008 4 M9999-042108 Absolute Maximum Ratings Supply Voltage [100ms transient] (VIN) ..........................18V Output Switch Voltage (VSW). .........................................18V Output Switch Current (ISW)...........................................6.0A Enable, Output-Sense Voltage (VEN, VOUT). ...................18V Sync Voltage (VSYNC)........................................................6V Operating Ratings Supply Voltage (VIN)....................................... 4.5V to 16.5V Junction Temperature (TJ) ........................–40°C to +125°C Electrical Characteristics VIN = 7.0V; TA = 25°C, bold values indicate –40°C< TA < +85°C, unless noted. Symbol Parameter Condition Min Typ Max Units PWM mode, output not switching, 4.5V ≤ VIN ≤ 16.5V 1.0 1.5 mA skip mode, output not switching, 4.5V ≤ VIN ≤ 16.5V 500 650 µA ISS Input Supply Current VEN = 0V, 4.5V ≤ VIN ≤ 16.5V 1 25 µA VBIAS Bias Regulator Output Voltage VIN = 16.5V 3.10 3.30 3.40 V VFB Feedback Voltage MIC2177 [adj.]: VOUT = 3.3V, ILOAD = 0 1.22 1.245 1.27 V MIC2177 [adj.]: VOUT = 3.3V, 5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A 3.20 3.14 3.3 3.40 3.46 V V MIC2177-5.0: ILOAD = 0 4.85 5.0 5.15 V MIC2177-5.0: 6V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A 4.85 4.75 5.0 5.15 5.25 V V MIC2177-3.3: ILOAD = 0 3.20 3.3 3.40 V VOUT Output Voltage MIC2177-3.3: 5V ≤ VIN ≤ 16V, 10mA ≤ ILOAD ≤ 2A 3.20 3.14 3.3 3.40 3.46 V V VTH upper threshold 4.25 4.35 V VTL Undervoltage Lockout lower threshold 3.9 4.15 V MIC2177 [adj.] 60 150 nA IFB Feedback Bias Current MIC2177-5.0, MIC2177-3.3 20 40 µA AVOL Error Amplifier Gain 0.6V ≤ VCOMP ≤ 0.8V 15 18 20 V upper limit 0.9 1.5 V Error Amplifier Output Swing Lower limit 0.05 0.1 V Error Amplifier Output Current source and sink 15 25 35 µA fO Oscillator Frequency 160 200 240 kHz DMAX Maximum Duty Cycle VFB = 1.0V 100 % tON min Minimum On-Time VFB = 1.5V 300 400 ns SYNC Frequency Range 220 300 kHz SYNC Threshold 0.8 1.6 2.2 V SYNC Minimum Pulse Width 500 ns ISYNC SYNC Leakage VSYNC = 0V to 5.5V –1 0.01 1 µA PWM mode, VIN = 12V 3.8 4.7 5.7 A ILIM Current Limit skip mode 600 mA high-side switch, VIN = 12V 90 250 mΩ RON Switch On-Resistance low-side switch, VIN = 12V 110 250 mΩ |
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