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MIC2549A-2YN Datasheet(PDF) 4 Page - Micrel Semiconductor |
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MIC2549A-2YN Datasheet(HTML) 4 Page - Micrel Semiconductor |
4 / 16 page MIC2545A/2549A Micrel M9999-041204 4 April 2004 Electrical Characteristics V IN = +5V; TA = 25°C, bold indicates –40°C to +85°C; unless noted Symbol Parameter Condition Min Typ Max Units Supply Current Switch off, OUT = open(6) 0.75 5 µA Switch on, OUT = open(6) 90 125 µA 150 µA V EN Enable Input Voltage Enable high transition(6) 2.4 1.6 V Enable low transition(6) 1.5 0.8 V Enable Input Current V EN = VOH(min) = 2.4V 0.01 1 µA V EN = VOL(max) = 0.8V 0.01 1 µA Enable Input Capacitance Note 7 1pF R DS(on) Switch Resistance I OUT = 500mA 35 50 m Ω Current Limit Factor I LIMIT = 0.5A to 3A, VOUT = 1V to 4V (5) 160 230 300 V I LIMIT = 1A to 2.5A, VOUT = 1V to 4V (5) 184 230 276 V Output Leakage Current Switch off, V OUT = 0V 1 10 µA t ON Output Turn-On Delay R L = 10Ω, CL = 1µF, Figures 1a, 1b 125 ms t R Output Turn-On Rise Time R L = 10Ω, CL = 1µF, Figure 1a, 1b 0.75 1.8 4.9 ms t OFF Output Turnoff Delay R L = 10Ω, CL = 1µF, Figure 1a, 1b 25 µs t F Output Turnoff Fall Time R L = 10Ω, CL = 1µF, Figure 1a, 1b 23 µs Overtemperature Threshold T J increasing 135 °C Shutdown T J decreasing 120 °C Error Flag Off Current V FLG = 5V 0.01 1 µA EN Pulse Reset Width MIC2549A thermal shutdown latch(7) 1 µs t SU V IN to EN Set-Up MIC2549A(7), Figure 1c 0 µs Current-Limit Response Time V OUT = 0V to IOUT = 2A, ISET = 1A (7) 40 µs V OL Error Flag Output Resistance I FLG = 10mA 4 15 Ω Notes: 1. Exceeding the absolute maximum ratings may damage the device. 2. The device is not guaranteed to function outside its operating ratings. 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: I R LIMIT SET = 230 , where R SET is in ohms, 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 ≤ 0.8V for the MIC2545A-2 and MIC2549A-2. The enable input has about 100mV of hysteresis. 7. Guaranteed by design but not production tested. Absolute Maximum Ratings(1) Supply Voltage (V IN) .................................................. +7.0V Output Voltage (V OUT) ............................................... +7.0V Output Current (I OUT) ............................... Internally Limited Enable Input (V EN) ......................................... –0.3V to +7V Fault Flag Voltage (V FLG) ........................................... +7.0V Fault Flag Current (I FLG) ............................................ 50mA Storage Temperature (T S) ....................... –65°C to +150°C Junction Temperature (T J) ....................... Internally Limited Lead Temperature (soldering 5 sec.) ........................ 260 °C ESD Rating(3) .......................................................................... 2004V Operating Ratings(2) Supply Voltage (V IN) ................................... +2.7V to +5.5V Ambient Temperature Range (T A) ............. –40°C to +85°C Package Thermal Resistance PDIP (θ JA) ......................................................... 130°C/W SOIC (θ JA) ......................................................... 160°C/W TSSOP (θ JA) (4) .................................................. 100 °C/W Current Limit Set Range(5) ................................. 0.5A to 3A |
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