LM2673-5.0EVAL National Semiconductor, LM2673-5.0EVAL Datasheet
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LM2673-5.0EVAL
Specifications of LM2673-5.0EVAL
LM2673-5.0-EVAL
LM2673-5.0-EVAL
Related parts for LM2673-5.0EVAL
LM2673-5.0EVAL Summary of contents
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... Other features include the ability to reduce the input surge current at power-ON by adding a softstart timing capacitor to gradually turn on the regulator. The LM2673 series also has built in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is guaranteed to a ± ...
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... LM2673SD-5.0 5.0 LM2673SDX-5.0 ADJ LM2673SD-ADJ ADJ LM2673SDX-ADJ www.national.com 10091301 LM2673T-3.3, LM2673T-5.0, LM2673T-12 or LM2673T-ADJ See NSC Package Number TA07B Top View LLP-14 See NS package Number SRC14A Package Marking S0002SB 250 Units on Tape and Reel S0002SB 2500 Units on Tape and Reel S0002TB ...
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... OUT IN η Efficiency V = 12V LM2673-12 Symbol Parameter V Output Voltage V = 15V to 40V, 100mA OUT IN η Efficiency V = 24V LM2673-ADJ Symbol Parameter V Feedback Voltage 40V, 100mA Programmed for 5V OUT η Efficiency V = 12V ESD (Note 2) (Note 1) Storage Temperature Range Soldering Temperature Wave 45V Infrared − ...
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All Output Voltage Versions Electrical Characteristics Limits appearing in bold type face apply over the entire junction temperature range of operation, −40°C to 125°C. Specifications appearing in normal type apply for T 5V and Adjustable versions and V IN Symbol ...
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Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions under which of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated ...
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Typical Performance Characteristics Normalized Output Voltage Efficiency vs Input Voltage Switch Current Limit www.national.com 10091304 10091306 Operating Quiescent Current 10091308 6 Line Regulation 10091305 Efficiency vs I LOAD 10091307 10091309 ...
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Switching Frequency Load Transient Response for Continuous Mode V = 20V OUT μ 200 μF, C OUT OUT A: Output Voltage, 100 mV//div, AC-Coupled. B: Load Current: 500 ...
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Continuous Mode Switching Waveforms V = 20V 5V OUT μ 200 μF, C OUT A: V Pin Voltage, 10 V/div Inductor Current, 1 A/div C: Output Ripple Voltage, 20 ...
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... CURRENT ADJUST A key feature of the LM2673 is the ability to tailor the peak switch current limit to a level required by a particular applica- tion. This alleviates the need to use external components that ...
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... LM2673. A simple design proce- dure using nomographs and component tables provided in this data sheet leads to a working design with very little effort. ...
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... R , ADJUSTABLE CURRENT LIMIT ADJ A key feature of the LM2673 is the ability to control the peak switch current. Without this feature the peak switch current would be internally set higher to accommodate 3A load current designs. This requires that both the inductor (which could saturate with excessively high currents) and the catch diode be able to safely handle which would be conducted under load fault conditions ...
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... Required output voltage Maximum DC input voltage Maximum output load current Step 2: Set the output voltage by selecting a fixed output LM2673 (3.3V 12V applications) or determine the re- quired feedback resistors for use with the adjustable LM2673 −ADJ Step 3: Determine the inductor required by using one of the four nomographs, Figure 3 through Figure 6 ...
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... Step 1: Operating conditions are: max) and the 2.5A Vout = 14.8V in Vin max = 28V Iload max = 2A Step 2: Select an LM2673S-ADJ. To set the output voltage to 14.9V two resistors need to be chosen (R1 and R2 in Figure 2). For the adjustable device the output voltage is set by the following relationship: Where recommended value to use for ...
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... Use a value of 12.4KΩ. LLP PACKAGE DEVICES The LM2673 is offered in the 14 lead LLP surface mount package to allow for a significantly decreased footprint with equivalent power dissipation compared to the TO-263. For details on mounting and soldering specifications, refer to Ap- plication Note AN-1187 ...
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... Inductor Selection Guides For Continuous Mode Operation FIGURE 3. LM2673-3.3 FIGURE 4. LM2673-5.0 10091319 10091320 15 10091321 FIGURE 5. LM2673-12 10091322 FIGURE 6. LM2673-ADJ www.national.com ...
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Inductor Inductance Current Reference (µH) Number L23 33 1.35 L24 22 1.65 L25 15 2.00 L29 100 1.41 L30 68 1.71 L31 47 2.06 L32 33 2.46 L33 22 3.02 L34 3.65 15 L38 68 2.97 L39 47 3.57 L40 ...
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Capacitor Selection Guides Capacitor AVX TPS Series Reference C (µF) WV (V) Code C1 330 C2 100 C3 220 100 C10 22 C11 C12 C13 Table 2. Input and ...
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Capacitor Sanyo OS-CON SA Series Reference C (µF) WV (V) Code C1 47 6.3 C2 150 6.3 C3 330 6.3 C4 100 10 C5 220 100 16 C8 150 16 C9 100 20 C10 47 ...
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Table 3. Output Capacitors for Fixed Output Voltage Application Output Inductance Voltage (V) (µ 3 100 Output Inductance Sanyo OS-CON SA Voltage (V) ...
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Table 4. Input Capacitors for Fixed Output Voltage Application (Assumes worst case maximum input voltage and load current for a given inductance value) Output Inductance Voltage (V) (µ 3 ...
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Table 5. Schottky Diode Selection Table Reverse Surface Mount Voltage More (V) 20V SK32 30V SK33 MBRD835L 30WQ03F 40V SK34 MBRB1545CT 30BQ040 6TQ045S 30WQ04F MBRS340 MBRD340 SK35 50V or More 30WQ05F Diode Manufacturer Contact Numbers Phone International ...
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Table 6. Output Capacitors for Adjustable Output Voltage Applications Output Voltage Inductance (V) 1.21 to 2.50 2.5 to 3.75 3. 6.25 6.25 to 7.5 7 12.5 12 ...
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Output Capacitors for Adjustable Output Voltage Applications (continued) Output Voltage Inductance Sanyo OS-CON SA (V) (µH) No. 33* 2 1.21 to 2.50 47* 2 33* 1 2.5 to 3. ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TO-263 Surface Mount Power Package Order Number LM2673S-3.3, LM2673S-5.0, LM2673S-12 or LM2673S-ADJ NS Package Number TS7B 24 ...
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... TO-220 Power Package Order Number LM2673T-3.3, LM2673T-5.0, LM2673T-12 or LM2673T-ADJ NS Package Number TA07B 14-Lead LLP Package NS Package Number SRC14A 25 www.national.com ...
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