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LM3674MF-1.875 Fiches technique(PDF) 5 Page - Texas Instruments |
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LM3674MF-1.875 Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 25 page LM3674 www.ti.com SNVS405F – DECEMBER 2005 – REVISED MAY 2013 Electrical Characteristics (1) (2) (3) Limits in standard typeface are for TJ = 25°C. Limits in boldface type apply over the full operating junction temperature range ( −30°C ≤ TJ ≤ 125°C). Unless otherwise noted, specifications apply to the LM3674 with VIN = EN = 3.6V Parameter Test Condition Min Typ Max Units VFB Feedback Voltage(4)(5) IO = 10mA -4 +4 % Line Regulation 2.7V ≤ VIN ≤ 5.5V 0.083 %/V IO = 100 mA Load Regulation 100 mA ≤ IO ≤ 600 mA 0.0010 %/mA VIN = 3.6V VREF Internal Reference Voltage See (6) 0.5 V ISHDN Shutdown Supply Current EN = 0V 0.01 1 µA IQ DC Bias Current into VIN No load, device is not switching 300 600 µA (FB=0V) RDSON (P) Pin-Pin Resistance for PFET ISW = 200mA 380 500 m Ω RDSON (N) Pin-Pin Resistance for NFET ISW = 200mA 250 400 m Ω ILIM Switch Peak Current Limit Open Loop (7) 830 1020 1200 mA VIH Logic High Input 1.0 V VIL Logic Low Input 0.4 V IEN Enable (EN) Input Current 0.01 1 µA FOSC Internal Oscillator Frequency PWM Mode 1.6 2 2.6 MHz (1) All voltages are with respect to the potential at the GND pin. (2) Min and Max limits are specified by design, test or statistical analysis. Typical numbers represent the most likely norm. (3) The parameters in the electrical characteristic table are tested at VIN = 3.6V unless otherwise specified. For performance over the input voltage range refer to datasheet curves. (4) ADJ configured to 1.5V output. (5) For VOUT less than 2.5V, VIN = 3.6V, for VOUT greater than or equal to 2.5V, VIN = VOUT +1. (6) For the ADJ version the resistor dividers should be selected such that at the desired output voltage, the voltage at the FB pin is 0.5V. (7) Refer to datasheet curves for closed loop data and its variation with regards to supply voltage and temperature. Electrical Characteristic table reflects open loop data (FB=0V and current drawn from SW pin ramped up until cycle by cycle current limit is activated). Closed loop current limit is the peak inductor current measured in the application circuit by increasing output current until output voltage drops by 10%. Dissipation Rating over operating free-air temperature range (unless otherwise noted) θJA TA ≤ 25°C (Power Rating) TA = 60°C (Power Rating) TA = 85°C (Power Rating) 250°C/W (2 layer board) 400mW 260mW 160mW 130°C/W (4 layer board) 770mW 500mW 310mW Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3674 |
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