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B340L датащи(PDF) 4 Page - Orister Corporation |
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B340L датащи(HTML) 4 Page - Orister Corporation |
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4 / 11 page ![]() Page No. : 4/11 DS‐RS6515‐08 JULY, 2010 www.Orister.com Electrical Characteristics (VIN=12V, TA=25°C, unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit VIN Input Voltage ‐ 4.75 ‐ 20 V VFB Feedback Voltage 4.75V ≤ VIN ≤ 21V 0.898 0.925 0.952 V RDS(ON)1 Upper Switch On Resistance ‐ ‐ 0.22 ‐ Ω RDS(ON)2 Lower Switch On Resistance ‐ ‐ 10 ‐ Ω ISw Upper Switch Leakage VEN = 0V, VSW = 0V ‐ ‐ 10 uA ILIM Current Limit (NOTE 1) ‐ 3.0 ‐ ‐ A GCS Current Sense Transconductance Output Current to Comp Pin Voltage ‐ ‐ 1.95 ‐ A/V AVEA Error Amplifier Voltage Gain ‐ ‐ 400 ‐ V/V GEA Error Amplifier Transconductance ‐ 550 830 1150 uA/V FS Oscillator Frequency ‐ ‐ 400 ‐ KHz FOSC1 Short Circuit Frequency VFB = 0V ‐ 240 ‐ KHz ‐ Soft‐Start Pin Equivalent Output Resistance ‐ ‐ 9 ‐ KΩ DMAX Maximum Duty Cycle VFB = 1.0V ‐ 90 ‐ % tON Minimum On Time ‐ ‐ 100 ‐ ns ‐ EN Shutdown Threshold ICC>100uA 0.7 1.0 1.3 V ‐ Enable Pull Up Current VEN = 0V ‐ 1.0 ‐ uA ‐ EN UVLO Threshold Rising VIN Rising 2.35 2.50 2.65 V ‐ EN UVLO Threshold Hysteresis ‐ ‐ 210 ‐ mV ISD Supply Current (Shutdown) VIN ≤0.4V ‐ 23 36 uA IQ Supply Current (Quiescent) VEN ≥3V ‐ 1.1 1.3 mA TSD Thermal Shutdown ‐ ‐ 160 ‐ oC Notes: 1. Slope compensation changes current limit above 40% duty cycle. 2. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. 3. Devices are ESD sensitive. Handling precaution is recommended. 4. The device is not guaranteed to function outside its operating conditions. 5. θJA is measured in the natural convection at TA = 25°C on a high effective four layers thermal conductivity test board of JEDEC 51‐7 thermal measurement standard. |
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