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MIC4782 Datasheet(PDF) 4 Page - Micrel Semiconductor |
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MIC4782 Datasheet(HTML) 4 Page - Micrel Semiconductor |
4 / 23 page Micrel, Inc. MIC4782 August 2009 4 M9999-081709-D Absolute Maximum Ratings(1) Supply Voltage (VIN)..................................... –0.3V to +6.5V Output Switch Voltage (VSW1, VSW2).............. –0.3V to +6.5V Output Switch Current (ISW1, ISW2)………...Internally Limited Input Voltage (VEN), (VFB), (VBIAS) .......................-0.3V to VIN Storage Temperature (Ts) .........................–60°C to +150°C Junction Temperature ................................................ 150°C Lead Temperature (soldering, 10sec.)....................... 260°C ESD Rating (3)................................................................. 2KV Operating Ratings(2) Supply Voltage (VIN)........................................... +3V to +6V Logic Input Voltage (VEN) ....................................... 0V to VIN Junction Temperature (TJ) ........................–20°C to +125°C Junction Thermal Resistance 3mm x 3mm MLF ® (θJA).....................................60°C/W Electrical Characteristics(4) VIN = VEN = 3.6V; L = 1.0µH; COUT = 4.7µF; TA = 25°C, unless noted. Bold values indicate –20°C< TJ < +125°C. Parameter Condition Min Typ Max Units Supply Voltage Range 3.0 6.0 V Under-Voltage Lockout Threshold Turn-on 2.45 2.6 2.7 V UVLO Hysteresis 100 mV VFB = 0.9 * VNOM (not switching); VIN = 6V 1.4 3.0 mA Quiescent Current VFB = 0.9 * VNOM (not switching); VIN = 3.6V 1.0 mA Shutdown Current VEN = 0V 1.6 µA [Adjustable] Feedback Voltage ± 3%, ILOAD = 100µA 589 607 625 mV FB pin input current 1 nA Current Limit VFB = 0.9 * VNOM 2.5 4.3 A Output Voltage Line Regulation VIN = 3V to 6V; ILOAD= 100 µA 0.07 % Output Voltage Load Regulation 20mA < ILOAD < 2A 0.2 % Maximum Duty Cycle VFB ≤ 0.9 * VNOM 100 % Switch ON-Resistance ISW = 50mA VFB =GND 155 mΩ Oscillator Frequency 1.8 MHz Switching Phase 180 Deg Enable Threshold 0.5 0.9 1.3 V Enable Hysteresis 55 mV Enable Input Current 0.1 µA Over-Temperature Shutdown 153 °C Over-Temperature Hysteresis 18 °C 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, 1.5k in series with 100pF. 4. Specification for packaged product only. |
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