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LM2638MX Datasheet(PDF) 4 Page - Texas Instruments |
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LM2638MX Datasheet(HTML) 4 Page - Texas Instruments |
4 / 8 page OBSOLETE LM2638 SNVS046A – MAY 2004 – REVISED NOVEMBER 2004 www.ti.com Electrical Characteristics (continued) VCC = 5V, VDD = 12V unless otherwise specified. Typicals and limits appearing in plain type apply for TA = TJ = +25°C. Limits appearing in boldface type apply over the 0°C to +70°C range. Symbol Parameter Conditions Min Typ Max Units VOCP Over-Current Trip Point (CS+ and CS+ = 2V, CS − Drops from 2V 41 55 69 mV CS − Differential Voltage) 1.5V LDO CONTROLLER SECTION VSNS2 SNS2 Voltage VDD = 12V, VCC = 4.75V to 5.25V, 1.463 1.5 1.538 V IG2 = 0 mA to 20 mA ROUT2 Output Resistance 200 Ω ISNS2 SNS2 Pin Bias Current When Regulating 21 μA VPWGD_HI PWGD High Trip Point (2) 0.63 V VPWGD_LO PWGD Low Trip Point (2) 0.44 V 1.25V LDO CONTROLLER SECTION VSNS3 SNS3 Voltage VDD = 12V, VCC = 4.75V to 5.25V, 1.219 1.25 1.281 V IG3 = 0 mA to 20 mA ROUT3 Output Resistance 200 Ω ISNS3 SNS3 Pin Bias Current When Regulating 0 μA VPWGD_HI PWGD High Trip Point (2) 0.63 V VPWGD_LO PWGD Low Trip Point (3) 0.44 V (3) The output level of the PWGD pin is a logic AND of the power good function of the switching section, the 1.5V section and the 1.25V section. For the switching section, the power good is a window. For the two linear sections, the power good is a threshold with some hysteresis. 4 Submit Documentation Feedback Copyright © 2004, Texas Instruments Incorporated Product Folder Links: LM2638 |
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