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MIC4724 Datasheet(PDF) 3 Page - Micrel Semiconductor |
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MIC4724 Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 19 page Micrel, Inc. MIC4724 June 2008 3 M9999-062408-A Absolute Maximum Ratings (1) Supply Voltage (VIN)....................................................+6.5V Output Switch Voltage (VSW) .......................................+6.5V Output Switch Current (ISW)............................................11A Logic Input Voltage (VEN) .................................. –0.3V to VIN Storage Temperature (Ts) .........................–60°C to +150°C Operating Ratings (2) Supply Voltage (VIN)..................................... +3.0V to +6.0V Logic Input Voltage (VEN) ....................................... 0V to VIN Junction Temperature (TJ) ........................–40°C to +125°C Junction Thermal Resistance (θJA) ...................................................................63°C/W Electrical Characteristics (4) VIN = VEN = 3.6V; L = 1µH; COUT = 4.7µF; TA = 25°C, unless noted. Bold values indicate –40°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 2.55 2.65 V UVLO Hysteresis 100 mV Quiescent Current VFB = 0.9 * VNOM (not switching) 570 900 µA Shutdown Current VEN = 0V 2 15 µA [Adjustable] Feedback Voltage ± 2% (over temperature) ILOAD = 100mA 0.98 1.02 V FB pin input current 1 nA Current Limit in PWM Mode VFB = 0.9 * VNOM 3.5 5 A Output Voltage Line Regulation VOUT > 2V; VIN = VOUT+500mV to 6.0V; ILOAD= 100mA VOUT < 2V; VIN = 2.7V to 6.0V; ILOAD= 100mA 0.07 % % Output Voltage Load Regulation 20mA < ILOAD < 3A 0.2 % Maximum Duty Cycle VFB ≤ 0.4V 100 % PWM Switch ON- Resistance ISW = 50mA; VFB = GND (High Side Switch) 110 mΩ mΩ Oscillator Frequency 2 MHz Enable Threshold 0.5 0.85 1.3 V Enable Hysteresis 50 mV Enable Input Current 0.1 2.3 µA Power Good Range ±7 ±10 % Power Good Resistance IPGOOD = 500µA 150 300 Ω Over-Temperature Shutdown 160 °C Over-Temperature Hysteresis 25 °C Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. It is recommended that a transient input voltage may not exceed operating rating of the device for more that 5% of the time and in no case should the transient voltage exceed the absolute maximum rating of the device. 3. Specification for packaged product only. |
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