LM2700LDX-ADJ National Semiconductor, LM2700LDX-ADJ Datasheet
LM2700LDX-ADJ
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LM2700LDX-ADJ Summary of contents
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... The LM2700 is available in a low profile 14-lead TSSOP package or a 14-lead LLP package. Typical Application Circuit © 2004 National Semiconductor Corporation Features n 3.6A, 0.08Ω, internal switch n Operating input voltage range of 2.2V to 12V n Input undervoltage protection n Adjustable output voltage ...
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... Connection Diagram Ordering Information Order Number LM2700MT-ADJ LM2700MTX-ADJ LM2700LD-ADJ LM2700LDX-ADJ Pin Description Pin Name SHDN 4 AGND 5 PGND 6 PGND 7 PGND FSLCT 14 NC www.national.com Top View 20012304 14-Lead TSSOP or LLP Package Type NSC Package Drawing ...
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Block Diagram Detailed Description The LM2700 utilizes a PWM control scheme to regulate the output voltage over all load conditions. The operation can best be understood referring to the block diagram and Figure 1 of the Operation section. At the ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications Voltage FB Voltage V Voltage C SHDN Voltage (Note 1) FSLCT (Note 1) Maximum Junction Temperature Power Dissipation(Note 3) Lead Temperature Vapor Phase (60 sec.) Electrical Characteristics ...
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Electrical Characteristics Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T and the ambient temperature See the Electrical Characteristics table for the thermal resistance. The maximum allowable power dissipation at any ...
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Typical Performance Characteristics Switch Current Limit vs. Temperature R vs. V DSON ( (600 kHz, switching) www.national.com (Continued) 20012320 IN 20012327 20012329 6 Switch Current Limit vs 20012322 I vs. ...
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Typical Performance Characteristics I vs (1.25 MHz, switching) Frequency vs (600 kHz) (Continued) 20012319 20012323 (In shutdown) 20012318 Frequency vs (1.25 MHz) 20012324 www.national.com ...
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Operation (a) First Cycle of Operation (b) Second Cycle Of Operation CONTINUOUS CONDUCTION MODE The LM2700 is a current-mode, PWM boost regulator. A boost regulator steps the input voltage higher output voltage. In continuous conduction mode (when ...
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Operation (Continued) The LM2700 is a current mode PWM boost converter. The signal flow of this control scheme has two feedback loops, one that senses switch current and one that senses output voltage. To keep a current programmed control converter ...
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Operation (Continued) very little load changes, and at lower current outputs, the input capacitor size can often be reduced. The size can also be reduced if the input of the regulator is very close to the source output. The size ...
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Operation (Continued) gin can also be improved by adding the section. The equation for A DC additional equations required for the calculation 0.072fs (in V/s) where R is the minimum load resistance mum ...
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Application Information www.national.com (Continued) FIGURE 4. 1.25 MHz operation, 8V output FIGURE 5. 600 kHz operation, 5V output 12 20012330 20012332 ...
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Application Information V = 3.3V 200mAV 700mA V 200mA IN OUT CH1: I 0.5A/div DC Coupled OUT CH2: V 500mV/div AC Coupled OUT CH3: Inductor Current 1A/div DC Coupled 20µs/div (Continued) Load Transient for Figure 5 FIGURE 6. ...
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Application Information V = 3.3V 50mAV 350mA V 50mA IN OUT CH1: I 0.5A/div DC Coupled OUT CH2: V 500mV/div AC Coupled OUT CH3: Inductor Current 1A/div DC Coupled 50µs/div FIGURE 7. Triple Output TFT Bias (600 kHz ...
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Application Information V = 3.3V 500mA IN OUT CH1: V 2V/div DC Coupled IN CH2: V 5V/div DC Coupled OUT CH3: Inductor Current 500mA/div DC Coupled 1ms/div V = 3.3V 50mAV 375mA V 50mA IN OUT ...
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Physical Dimensions unless otherwise noted www.national.com inches (millimeters) LLP-14 Pin Package (LDA) For Ordering, Refer to Ordering Information Table NS Package Number LDA14A TSSOP-14 Pin Package (MTC) For Ordering, Refer to Ordering Information Table NS Package Number MTC14 16 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...