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MIC2172YN Datasheet(PDF) 5 Page - Micrel Semiconductor |
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MIC2172YN Datasheet(HTML) 5 Page - Micrel Semiconductor |
5 / 17 page April 2005 5 M9999-042205 MIC2172/3172 Micrel, Inc. Parameter Conditions Min Typ Max Units Error Amplifier Section Transconductance (∆ICOMP/∆VFB) ∆ICOMP = ±25µA 3.0 3.9 6.0 µA/mV 2.4 7.0 µA/mV Voltage Gain (∆VCOMP/∆VFB) 0.9V ≤ VCOMP ≤ 1.4V 500 800 2000 V/V Output Current V COMP = 1.5V 125 175 350 µA 100 400 µA Output Swing High Clamp, V FB = 1V 1.8 2.1 2.3 V Low Clamp, V FB = 1.5V 0.25 0.35 0.52 V Compensation Pin Duty Cycle = 0 0.8 0.9 1.08 V Threshold 0.6 1.25 V Output Switch Section ON Resistance I SW = 1A, VFB = 0.8V 0.76 1 Ω 1.1 Ω Current Limit Duty Cycle = 50%, T J ≥ 25°C 1.25 3 A Duty Cycle = 50%, T J < 25°C 1.25 3.5 A Duty Cycle = 80% Note 2 1 2.5 A Breakdown Voltage (BV) 3V ≤ VIN ≤ 40V 65 75 V I SW = 5mA Oscillator Section Frequency (f O) 88 100 112 kHz 85 115 kHz Duty Cycle [δ(max)] 80 89 95 % Input Supply Voltage Section and Enable Section Minimum Operating Voltage 2.7 3.0 V Quiescent Current (I Q) 3V ≤ VIN ≤ 40V, VCOMP = 0.6V, ISW = 0 7 9 mA Shutdown, V EN = 0V 0.1 5 µA Quiescent Current Increase (∆IIN) ∆ISW = 1A, VCOMP = 1.5V 9 20 mA Enable Input Threshold 0.4 1.2 2.4 V Enable Input Current V EN = 0V –1 0 1 µA V EN = 2.4V 2 10 µA Bold type denotes specifications applicable to the full operating temperature range. Note 1 Devices are ESD sensitive. Handling precautions required. Note 2 For duty cycles (δ) between 50% and 95%, minimum guaranteed switch current is given by ICL = 0.833 (2-δ) for the MIC3172. Note 3 Specification for packaged product only. |
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