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LM2621 Datasheet(PDF) 3 Page - Texas Instruments |
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LM2621 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 17 page SW 8 BOOT 7 VDD 6 SGND 5 PGND EN FREQ FB 1 2 3 4 LM2621 www.ti.com SNVS033D – MAY 2004 – REVISED NOVEMBER 2015 5 Pin Configuration and Functions DGK Package 8-Pin VSSOP Top View Pin Functions PIN TYPE(1) DESCRIPTION NAME NO. PGND 1 GND Power Ground EN 2 I Active-Low Shutdown Input FREQ 3 A Frequency Adjust. An external resistor connected between this pin and Pin 6 (VDD) sets the switching frequency of the LM2621. FB 4 A Output Voltage Feedback SGND 5 GND Signal Ground VDD 6 PWR Power Supply for Internal Circuitry BOOT 7 PWR Bootstrap Supply for the Gate Drive of Internal MOSFET Power Switch SW 8 PWR Drain of the Internal MOSFET Power Switch (1) I = Input, O = Output, PWR = Power, GND = Ground, A = Analog 6 Specifications 6.1 Absolute Maximum Ratings See (1) (2) MIN MAX UNIT SW Pin Voltage –0.5 14.5 V BOOT, VDD, EN and FB Pins –0.5 10 V FREQ Pin 100 µA Power Dissipation (TA=25°C) (3) 500 mW TJmax (3) 150 °C Lead Temp. (Soldering, 5 sec) 260 °C Storage temperature, Tstg –65 150 °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. (3) The maximum power dissipation must be derated at elevated temperatures and is dictated by Tjmax (maximum junction temperature), θJA (junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is Pdmax = (Tjmax - TA)/ θJA or the number given in the Absolute Maximum Ratings, whichever is lower. Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM2621 |
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