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LM22678QTJE-5.0 数据表(PDF) 3 Page - Texas Instruments |
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LM22678QTJE-5.0 数据表(HTML) 3 Page - Texas Instruments |
3 / 23 page LM22678 www.ti.com SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013 Absolute Maximum Ratings (1) (2) VIN to GND 43V EN Pin Voltage -0.5V to 6V SW to GND (3) -5V to VIN BOOT Pin Voltage VSW + 7V FB Pin Voltage -0.5V to 7V Power Dissipation Internally Limited Junction Temperature 150°C For soldering specifications, refer to the following document: www.ti.com/lit/snoa549 ESD Rating (4) Human Body Model ±2 kV Storage Temperature Range -65°C to +150°C (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be operated beyond such conditions. (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. (3) The absolute maximum specification of the ‘SW to GND’ applies to DC voltage. An extended negative voltage limit of -10V applies to a pulse of up to 50 ns. (4) ESD was applied using the human body model, a 100 pF capacitor discharged through a 1.5 k Ω resistor into each pin. Operating Ratings (1) Supply Voltage (VIN) 4.5V to 42V Junction Temperature Range -40°C to +125°C (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings indicate conditions at which the device is functional and should not be operated beyond such conditions. Electrical Characteristics Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified: VIN = 12V. Min Typ Max Parameter Test Conditions Units (1) (2) (1) LM22678-5.0 VFB Feedback Voltage VIN = 8V to 42V 4.925/4.9 5.0 5.075/5.1 V LM22678-ADJ VFB Feedback Voltage VIN = 4.7V to 42V 1.266/1.259 1.285 1.304/1.311 V All Output Voltage Versions IQ Quiescent Current VFB = 5V 3.4 6 mA ISTDBY Standby Quiescent Current EN Pin = 0V 25 40 µA ICL Current Limit 6.0/5.75 7.1 8.4/8.75 A IL Output Leakage Current VIN = 42V, EN Pin = 0V, VSW = 0V 0.2 2 µA VSW = -1V 0.1 3 µA RDS(ON) Switch On-Resistance 0.1 0.14/0.2 Ω fO Oscillator Frequency 400 500 600 kHz TOFFMIN Minimum Off-time 100 200 300 ns TONMIN Minimum On-time 100 ns (1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate TI's Average Outgoing Quality Level (AOQL). (2) Typical values represent most likely parametric norms at the conditions specified and are not ensured. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM22678 |
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