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LM2673SX-5.0 Scheda tecnica(PDF) 6 Page - Texas Instruments |
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LM2673SX-5.0 Scheda tecnica(HTML) 6 Page - Texas Instruments |
6 / 37 page 6 LM2673 SNVS030O – APRIL 2000 – REVISED JUNE 2016 www.ti.com Product Folder Links: LM2673 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated (1) All room temperature limits are 100% tested during production with TA = TJ = 25°C. All limits at temperature extremes are specified via correlation using standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical values are determined with TA = TJ = 25°C and represent the most likely norm. 6.7 Electrical Characteristics: LM2673 – 12 V PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT VOUT Output voltage VIN = 15 V to 40 V, 100 mA ≤ IOUT ≤ 5 A 11.76 12 12.24 V over the entire junction temperature range of operation –40°C to 125°C 11.64 12.36 η Efficiency VIN = 24 V, ILOAD = 5 A 94% (1) All room temperature limits are 100% tested during production with TA = TJ = 25°C. All limits at temperature extremes are specified via correlation using standard Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical values are determined with TA = TJ = 25°C and represent the most likely norm. 6.8 Electrical Characteristics: LM2673 – Adjustable PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT VFB Feedback voltage VIN = 8 V to 40 V, 100 mA ≤ IOUT ≤ 5 A, VOUT programmed for 5 V 1.186 1.21 1.234 V over the entire junction temperature range of operation –40°C to 125°C 1.174 1.246 η Efficiency VIN = 12 V, ILOAD = 5 A 88% (1) The peak switch current limit is determined by the following relationship: ICL=37,125/ RADJ. 6.9 Electrical Characteristics – All Output Voltage Versions Specifications are for TA = TJ = 25°C unless otherwise specified. Unless otherwise specified VIN = 12 V for the 3.3-V, 5-V, and Adjustable versions and VIN = 24 V for the 12-V version. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DEVICE PARAMETERS IQ Quiescent current VFEEDBACK = 8 V for 3.3-V, 5-V, and ADJ versions, VFEEDBACK = 15 V for 12-V versions 4.2 6 mA VADJ Current limit adjust voltage 1.181 1.21 1.229 V over the entire junction temperature range of operation –40°C to 125°C 1.169 1.246 ICL Current limit RADJ = 5.6 kΩ, (1) 5.5 6.3 7.6 A over the entire junction temperature range of operation –40°C to 125°C 5.3 8.1 IL Output leakage current VIN = 40 V, soft-start pin = 0 V VSWITCH = 0 V 1 1.5 mA VSWITCH = –1 V 6 15 RDS(ON) Switch ON-resistance ISWITCH = 5 A 0.12 0.14 Ω over the entire junction temperature range of operation –40°C to 125°C 0.225 fO Oscillator frequency Measured at switch pin 260 kHz over the entire junction temperature range of operation –40°C to 125°C 225 280 D Duty cycle Maximum duty cycle 91% Minimum duty cycle 0% IBIAS Feedback bias current VFEEDBACK = 1.3 V ADJ version only 85 nA VSFST Soft-start threshold voltage 0.63 V over the entire junction temperature range of operation –40°C to 125°C 0.53 0.74 ISFST Soft-start pin current Soft-start pin = 0 V 3.7 µA over the entire junction temperature range of operation –40°C to 125°C 6.9 |
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