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LM2598 データシート(PDF) 3 Page - Texas Instruments |
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LM2598 データシート(HTML) 3 Page - Texas Instruments |
3 / 45 page LM2598 www.ti.com SNVS125C – MARCH 1998 – REVISED APRIL 2013 Absolute Maximum Ratings (1) (2) Maximum Supply Voltage (VIN) 45V SD/SS Pin Input Voltage (3) 6V Delay Pin Voltage (3) 1.5V Flag Pin Voltage −0.3 ≤ V ≤ +45V Feedback Pin Voltage −0.3 ≤ V ≤ +25V Output Voltage to Ground (Steady State) −1V Power Dissipation Internally limited Storage Temperature Range −65°C to +150°C ESD Susceptibility Human Body Model (4) 2 kV Lead Temperature S Package Vapor Phase (60 sec.) +215°C Infrared (10 sec.) +245°C T Package (Soldering, 10 sec.) +260°C Maximum Junction Temperature +150°C (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. (3) Voltage internally clamped. If clamp voltage is exceeded, limit current to a maximum of 1 mA. (4) The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Operating Conditions Temperature Range −25°C ≤ TJ ≤ +125°C Supply Voltage 4.5V to 40V LM2598-3.3 Electrical Characteristics Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions LM2598-3.3 Units (Limits) Typ Limit (1) (2) SYSTEM PARAMETERS (3) Test Circuit Figure 24 VOUT Output Voltage 4.75V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 3.3 V 3.168/3.135 V(min) 3.432/3.465 V(max) η Efficiency VIN = 12V, ILOAD = 1A 78 % (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2598 is used as shown in the Figure 24 test circuit, system performance will be as shown in system parameters of Electrical Characteristics section. Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM2598 |
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