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MIC2299 Datasheet(PDF) 3 Page - Micrel Semiconductor |
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MIC2299 Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 14 page Micrel, Inc. MIC2299 October 2007 3 M9999-101907-B Absolute Maximum Ratings (1) Supply Voltage (VIN).......................................................12V Switch Voltage (VSW)....................................... –0.3V to 34V BRT Voltage (VBRT) ........................................... –0.3V to 6V Enable Voltage (VEN)....................................... –0.3V to 12V FB Voltage (VFB)...............................................................6V Switch Current (ISW) ..................................Internally Limited Ambient Storage Temperature (Ts)...........–65°C to +150°C ESD Rating (3).................................................................. 2kV Operating Ratings (2) Supply Voltage (VIN).......................................... 2.5V to 10V BRT Voltage (VBRT) ........................................... 0V to 0.6VIN Enable Voltage (VEN).............................................. 0V to VIN Output Voltage (VOUT) ................................... VIN + 1 to VOVP Junction Temperature (TJ) ........................–40°C to +125°C Package Thermal Impedance 3x3 MLF-12 ( θJA) ...............................................60°C/W Electrical Characteristics (4) TA = 25°C; VIN = VEN = 3.6V; VOUT = 7V; IOUT = 1A, unless otherwise noted. Bold values indicate –40°C< TJ < +125°C. Symbol Parameter Condition Min Typ Max Units VIN Supply Voltage Range 2.5 10 V VUVLO Under-Voltage Lockout 1.8 2.1 2.4 V VOVP Over-Voltage Protection 12 13.5 15 V IVIN Quiescent Current VFB >200mV, Not Switching 15 23 mA ISD Shutdown Current VEN = 0V (Note 5) 0.1 1 µA VFB Feedback Voltage (±8%) (±10%) (Over Temp) 184 180 200 216 220 mV mV IFB Feedback Input Current VFB = 200mV –450 nA Line Regulation 2.5V ≤ VIN ≤ 4.5V 0.5 % LED Dimming Accuracy (% of V VFBNOM), Note 6 VBRT = GND RBRT = 50K 17 45 20 50 23 55 % % DMAX Maximum Duty Cycle 90 % ISW Switch Current Limit VIN = 3V 3.5 4.75 8 A VSW Switch Saturation Voltage VIN = 3.6V, ISW = 3.5A 350 500 mV ISW Switch Leakage Current VEN = 0V, VSW = 10V 0.01 10 µA VEN Enable Threshold TURN ON TURN OFF 1.5 0.4 V V IEN Enable Pin Current VEN = 10V 20 40 µA fSW Oscillator Frequency MIC2299 1.75 2 2.3 MHz ISS Soft start / DIM current DIM = 0V 5 µA 150 °C TJ Over-Temperature Threshold Shutdown Hysteresis 10 °C Notes: 1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(Max), the junction-to-ambient thermal resistance, θ JA, and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended. 4. Specification for packaged product only. 5. ISD = IVIN 6. As percentage of full brightness where VIN = VBRT = 3.6V (100% brightness) |
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