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MIC3232YMM 数据表(PDF) 4 Page - Micrel Semiconductor |
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MIC3232YMM 数据表(HTML) 4 Page - Micrel Semiconductor |
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4 / 19 page  Micrel, Inc. MIC3230/1/2 November 2009 4 M9999-113009-B Absolute Maximum Ratings (1) Supply Voltage (VIN).....................................................+48V Enable Pin Voltage........................................... -0.3V to +6V IADJ Voltage ..................................................................+6V Lead Temperature (soldering, sec.)........................... 260°C Storage Temperature (Ts)..........................-65°C to +150°C ESD Rating (3) MIC3230 ....................................... 1500V HB, 100VMM MIC3232 ........................................... 2kV HB, 100VMM MIC3231 ....................................... 1500V HB, 150VMM Operating Ratings (2) Supply Voltage (VIN)......................................... +6V to +45V Junction Temperature (TJ)........................ –40°C to +125°C Junction Thermal Resistance MSOP ( θJA) ...................................................130.5°C/W EPAD TSSOP ( θJA).........................................36.5°C/W MLF ® (θJA).......................................................60.7°C/W Electrical Characteristics (4) VIN = 12V; VEN = 3.6V; L = 47µH; C = 4.7µF; TJ = 25°C, Bold values indicate –40°C≤ TJ ≤ +125°C, unless noted. Symbol Parameter Condition Min Typ Max Units VIN Supply Voltage Range 6 45 V UVLO Under Voltage Lockout 3.5 4.9 5.5 V IVIN Quiescent Current VFB > 275mV (to ensure device is not switching) 3.2 10 mA ISD Shutdown Current VEN = 0V 30 µA Room temperature (3%) 242.5 250 257.5 mV VIADJ Feedback Voltage (at IADJ) –40°C≤ TJ ≤ +125°C (5%) 237.5 250 262.5 mV IADJ Feedback Input Current VFB = 250mV 1.2 3 µA Line Regulation VIN = 12V to 24V 2 % Load Regulation VOUT to 2 × VOUT 2 % DMAX Maximum Duty Cycle MIC3230 & MIC3232 MIC3231 90 88 % % VEN Enable Threshold Turn ON Turn OFF 1.5 1.15 1.1 0.4 V V IEN Enable Pin Current VEN = 3.3V REN = 100kΩ 17 30 µA VPWM PWMD Threshold Turn ON Turn OFF 1.5 0.75 0.7 0.4 V V fPWMD PWMD Frequency Range Note 5 (L = 47µH; C = 4.7µF) 0 500 Hz fSW Programmable Oscillator Frequency RFREQ = 82.5kΩ RFREQ = 21kΩ RFREQ = 8.25kΩ 360 109 400 950 440 kHz kHz kHz fSW Fixed Frequency Option (MIC3232YMM) 360 400 440 kHz FDITHER Low EMI (MIC3231) Frequency dither shift from nominal ±12 % VSENS Current Limit Threshold Voltage RSENSE = 390Ω 0.315 0.45 0.585 V ISENSE ISENSE Peak Current Out RSENSE = 390Ω 250 µA Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 4. Specification for packaged product only. 5. Guaranteed by design |
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