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LM27313XMF bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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LM27313XMF bảng dữ liệu(HTML) 3 Page - Texas Instruments |
3 / 20 page LM27313 www.ti.com SNVS487D – DECEMBER 2006 – REVISED APRIL 2013 Operating Ratings VIN 2.7V to 14V VSW(MAX) 30V VSHDN 0V to VIN Junction Temperature, TJ (1) -40°C to 125°C θJ-A (SOT-23-5) 265°C/W (1) The maximum power dissipation which can be safely dissipated for any application is a function of the maximum junction temperature, TJ(MAX) = 125°C, the junction-to-ambient thermal resistance for the SOT-23 package, θJ-A = 265°C/W, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature for designs using this device can be calculated using the formula: If power dissipation exceeds the maximum specified above, the internal thermal protection circuitry will protect the device by reducing the output voltage as required to maintain a safe junction temperature. Electrical Characteristics Unless otherwise specified: VIN = 5V, VSHDN = 5V, IL = 0 mA, and TJ = 25°C. Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range ( −40°C ≤ TJ ≤ +125°C). Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min Typical Max Units VIN Input Voltage 2.7 14 V ISW Switch Current Limit See(1) 0.80 1.25 A RDS(ON) Switch ON Resistance ISW = 100 mA 500 650 m Ω Device ON 1.5 VSHDN(TH) Shutdown Threshold V Device OFF 0.50 VSHDN = 0 0 ISHDN Shutdown Pin Bias Current µA VSHDN = 5V 0 2 VFB Feedback Pin Reference Voltage VIN = 3V 1.205 1.230 1.255 V IFB Feedback Pin Bias Current VFB = 1.23V 60 nA VSHDN = 5V, Switching 2.1 3.0 mA IQ Quiescent Current VSHDN = 5V, Not Switching 400 500 µA VSHDN = 0 0.024 1 ΔVFB/ΔVIN FB Voltage Line Regulation 2.7V ≤ VIN ≤ 14V 0.02 %/V fSW Switching Frequency 1.15 1.6 1.90 MHz DMAX Maximum Duty Cycle 80 88 % IL Switch Leakage Not Switching, VSW = 5V 1 µA (1) Switch current limit is dependent on duty cycle. Limits shown are for duty cycles ≤ 50%. See Figure 15 in Application Information – MAXIMUM SWITCH CURRENT section. Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM27313 |
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