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LM2640 数据表(PDF) 8 Page - Texas Instruments |
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LM2640 数据表(HTML) 8 Page - Texas Instruments |
8 / 29 page LM2640 SNVS019B – DECEMBER 1998 – REVISED APRIL 2013 www.ti.com Electrical Characteristics (continued) Typicals and limits appearing in regular type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0 to +125°C. Unless otherwise specified under the Parameter or Conditions columns, VIN = 10V, and VSD = VON/OFF1 = VON/OFF2 = 5V (1)(2)(3) Symbol Parameter Conditions Typical Limit Units VREF Reference Voltage 0.01 mA ≤ IREF ≤ 5 mA Source, VLIN 2.5 V ≤ 6V 2.45 V(min) 2.55 V(max) 0.01 mA ≤ IREF ≤ 5 mA Source, VLIN 2.45 V(min) ≤ 6V 2.5 2.555 V(max) −40°C ≤ TJ ≤ +125°C VLIN Output Voltage of the Linear 6V ≤ VIN ≤ 30V, 5 V Voltage Regulator 0 mA ≤ ILIN ≤ 25 mA 4.6 V(min) 5.4 V(max) VUVLO Undervoltage Lockout Threshold See(7) 4.0 V 3.6 V(min) 4.4 V(max) −40°C ≤ TJ ≤ +125°C (7) 3.6 V(min) 4.0 4.42 V(max) LIN-to-VOUT Switch-Over VOUT taken at CSL1 4.8 V Threshold Logic Inputs VIH Minimum High Level Input 2.4 V(min) Voltage (SD, ON/OFF1, −40°C ≤ TJ ≤ +125°C 2.45 V(min) ON/OFF2, and SYNC) VIH Minimum High Level Input 2.6 V(min) Voltage (2NDFB/FPWM) VIL Maximum Low Level Input 0.8 V(max) Voltage (SD, ON/OFF1, ON/OFF2, SYNC, and 2NDFB/FPWM) Maximum Input Leakage Current Logic Input Voltage 0 or 5V ±0.1 µA (SD, ON/OFF1, ON/OFF2, and SYNC) (7) The controllers remain OFF until the voltage of the 5V, 50 mA linear regulator (output at LIN) reaches this threshold. 8 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM2640 |
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