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MIC2545A-1YM Datasheet(PDF) 4 Page - Micrel Semiconductor |
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MIC2545A-1YM Datasheet(HTML) 4 Page - Micrel Semiconductor |
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4 / 18 page  Micrel, Inc. MIC2545A/2549A June 2011 4 M9999-062711-A Absolute Maximum Ratings (1) Supply Voltage (VIN)....................................................+7.0V Output Voltage (VOUT). ................................................+7.0V Output Current (IOUT) .................................Internally Limited Enable Input (VEN) ........................................... −0.3V to +7V Fault Flag Voltage (VFLG).............................................+7.0V Fault Flag Current (IFLG) ..............................................50mA Storage Temperature (Ts).........................–65°C to +150°C Junction Temperature (TJ) ........................Internally Limited Lead Temperature (soldering, 5sec.)......................... 260°C ESD Rating (3)..............................................................1500V Operating Ratings (2) Supply Voltage (VIN)..................................... +2.7V to +5.5V Ambient Temperature (TA) .......................... –40°C to +85°C Package Thermal Resistance PDIP ( θJA) ........................................................130°C/W SOIC ( θJA)........................................................160°C/W TSSOP ( θJA) (4)..................................................100°C/W Current-Limit Set Range (5) .................................. 0.5A to 3A Electrical Characteristics (4) VIN = +5V; TA = 25°C, bold values indicate –40°C to +85°C, unless noted. Symbol Parameter Condition Min. Typ. Max. Units Switch Off, OUT = Open (6) 0.75 5 µA 90 125 Supply Current Switch On, OUT = Open (6) 150 µA VEN Enable High Transition (6) 2.4 1.6 Enable Input Voltage Enable Low Transition (6) 1.5 0.8 V VEN = VOH(MIN) = 2.4V 0.01 1 Enable Input Current VEN = VOL(MAX) = 0.8V 0.01 1 µA Enable Input Capacitance Note 7 1 pF RDS(ON) Switch Resistance IOUT = 500mA 35 50 mΩ ILIMIT = 0.5A to 3A, VOUT = 1V to 4V (5) 184 230 276 Current-Limit Factor ILIMIT = 1A to 2.5A, VOUT = 1V to 4V (5) 195 230 264 V Output Leakage Current Switch Off, VOUT = 0V 1 10 µA tON Output Turn-On Delay RL = 10Ω, CL = 1µF, Figures 1a, 1b 1 2 5 ms tR Output Turn-On Rise Time RL = 10Ω, CL = 1µF, Figures 1a, 1b 0.75 1.8 4.9 ms tOFF Output Turn-Off Delay RL = 10Ω, CL = 1µF, Figures 1a, 1b 25 µs 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. Assumes 4-layer PCB is used. 5. Current limit is determined by ILIMIT = SET R 230 , where RSET is in Ωs, and 230 is typical current-limit factor in volts. 6. Off is ≤ 0.8V and on is ≥ 2.4V for the MIC2545A-1 and MIC2549A-1. Off is ≥ 2.4V and on is ≤ 9.8V for the MIC2545A-2 and MIC2549A-2. The enable input has about 100mV of hysteresis. 7. Guaranteed by design but not production tested. |
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