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MIC22705 Datasheet(PDF) 4 Page - Micrel Semiconductor |
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MIC22705 Datasheet(HTML) 4 Page - Micrel Semiconductor |
4 / 29 page Micrel, Inc. MIC22705 March 2011 4 M9999-033111-A Absolute Maximum Ratings (1, 2) PVIN to PGND.................................................... –0.3V to 6V SVIN to PGND..................................................–0.3V to PVIN VSW to PGND...................................................–0.3V to PVIN VEN/DLY to PGND .............................................. -0.3V to PVIN VPG to PGND ...................................................–0.3V to PVIN Junction Temperature ................................................ 150°C PGND to SGND ............................................. –0.3V to 0.3V Storage Temperature Range ....................–65°C to +150°C Lead Temperature (soldering, 10s)............................ 260°C Operating Ratings (3) Supply Voltage ................................................. 2.9V to 5.5V Power Good Voltage (VPG)...................................0V to PVIN Enable Input (VEN/DLY)...........................................0V to PVIN Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C Package Thermal Resistance 4mm x 4mm MLF ®-24 (θJC)................................14°C/W 4mm x 4mm MLF ®-24 (θJA)................................40°C/W Electrical Characteristics (4) SVIN = PVIN = VEN/DLY = 3.3V, VOUT = 1.8V, TA = 25°C, unless noted. Bold values indicate –40°C< TJ < +125°C. Parameter Condition Min. Typ. Max. Units Power Input Supply Input Voltage Range (PVIN) 2.9 5.5 V Undervoltage Lockout Trip Level PVIN Rising 2.55 2.75 2.9 V UVLO Hysteresis 420 mV Quiescent Supply Current VFB = 0.9V (not switching) 0.85 1.3 mA Shutdown Current VEN/DLY = 0V 5 10 µA Reference Feedback Reference Voltage 0.686 0.7 0.714 V Load Regulation IOUT = 100mA to 7A 0.2 % Line Regulation VIN = 2.9V to 5.5V; IOUT = 100mA 0.2 % FB Bias Current VFB = 0.5V 10 nA Enable Control EN/DLY Threshold Voltage 1.14 1.24 1.34 V EN Hysteresis 10 mV EN/DLY Bias Current VEN/DLY = 0.5V; VIN = 2.9V and VIN = 5.5V 0.7 1.0 1.3 µA RC Ramp Control RC Pin Source Current VRC = 0.35V 0.7 1.0 1.3 µA Oscillator Switching Frequency 0.8 1.0 1.2 MHz Maximum Duty Cycle VFB ≤ 0.5V 100 % Short-Current Protection Current Limit VFB = 0.5V 7 11 21 A Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. Devices are ESD sensitive. Handling precautions recommended. 3. The device is not guaranteed to function outside its operating rating. 4. Specification for packaged product only. |
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