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LM34923 Datasheet(PDF) 3 Page - Texas Instruments |
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LM34923 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 26 page LM34923 www.ti.com SNVS695A – MARCH 2011 – REVISED FEBRUARY 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) VIN, UV to RTN -0.3V to 80V BST to RTN -0.3V to 88V SW to RTN (Steady State) -1V to VIN + 0.3V BST to VCC 80V BST to SW 10V VCC, UVO, RT to RTN –0.3V to 10V FB, RT, to RTN -0.3 to 5V ESD Rating, Human Body Model(3) 2kV For soldering specifications see: Application Note SNOA549. Junction Temperature 150°C Storage Temperature Range -55°C to +150°C (1) If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications. (2) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics. (3) The human body model is a 100pF capacitor discharged through a 1.5k Ω resistor into each pin. Operating Ratings (1) VIN 6V to 75V Operating Junction Temperature −40°C to + 125°C (1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics. Electrical Characteristics Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction Temperature (TJ) range. Minimum and Maximum limits are specified 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. Unless otherwise stated the following conditions apply: VIN = 48V (1). Symbol Parameter Conditions Min Typ Max Unit VCC Supply Vcc Reg Vcc Regulator Output Vin = 48V 7.1 7.5 7.9 V Vin – Vcc VIN = 6V, ICC = 5mA 240 mV Vcc Output Impedance Vin =6V 45 Ω Vcc Current Limit Vin = 48V(2) 20 30 mA Vcc UVLO Vcc Increasing 4 4.8 V Vcc UVLO hysteresis 450 mV Iin Operating current FB = 3V, Vin = 48V 1 1.32 mA Iin Shutdown Current RT/SD = 0V 20 70 µA Switch Characteristics Buck switch Rds(on) Itest = 200 mA 0.56 1.1 Ω Gate Drive UVLO Vbst – Vsw Rising 2.15 3 3.8 V Gate Drive UVLO hysteresis 250 mV Pre-charge switch voltage At 1 mA 0.8 V Pre-charge switch on-time 150 ns (1) All electrical characteristics having room temperature limits are tested during production with TA = TJ = 25°C. All hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (2) The VCC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external loading. Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM34923 |
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