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MIC38C44YN Datasheet(PDF) 5 Page - Micrel Semiconductor |
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MIC38C44YN Datasheet(HTML) 5 Page - Micrel Semiconductor |
5 / 11 page MIC38C42/3/4/5 Micrel, Inc. September 2007 5 M9999-091107 Parameter Test Conditions Min Typ Max Units Current Sense Gain Notes 2, 3 2.85 3.0 3.15 V/V MaximumThreshold VCOMP = 5V, Note 2 0.9 1 1.1 V PSRR 12 ≤ VDD ≤ 18V, Note 2 70 dB Input Bias Current –0.1 –2 µA Delay to Output 120 250 ns Output RDS(ON) High ISOURCE = 200mA 20 Ω RDS(ON) Low ISINK = 200mA 11 Ω Rise Time TA = 25°C, CL = 1nF 40 80 ns Fall Time TA = 25°C, CL = 1nF 30 60 ns Undervoltage Lockout Start Threshold MIC38C42/4 13.5 14.5 15.5 V MIC38C43/5 7.8 8.4 9.0 V Minimum Operating Voltage MIC38C42/4 8 9 10 V MIC38C43/5 7.0 7.6 8.2 V Pulse Width Modulator Maximum Duty Cycle MIC38C42/3 94 96 % MIC38C44/5 46 50 % Minimum Duty Cycle 0 % Total Standby Current Start-Up Current VDD = 13V for MIC38C42/44 50 200 µA VDD = 7.5V for MIC38C43/45 Operating Supply Current VFB = VISNS = 0V 4.0 6.0 mA Zener Voltage (VDD) IDD = 25mA, Note 6 30 37 V Note 1: These parameters, although guaranteed, are not 100% tested in production. Note 2: Parameter measured at trip point of latch with VEA = 0. Note 3: Gain defined as: ∆VPIN1 A = ; 0 ≤ VTH (ISNS) ≤ 0.8V VTH (ISNS) Note 4: Adjust VDD above the start threshold before setting at 15V. Note 5: Output frequency equals oscillator frequency for the MIC38C42 and MIC38C43. Output frequency for the MIC38C44, and MIC38C45 equals one half the oscillator frequency. Note 6: On 8-pin version, 20V is maximum input on pin 7, as this is also the supply pin for the output stage. On 14-pin version, 40V is maximum for pin 12 and 20V maximum for pin 11. |
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