LM2621_05 NSC [National Semiconductor], LM2621_05 Datasheet
LM2621_05
Related parts for LM2621_05
LM2621_05 Summary of contents
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LM2621 Low Input Voltage, Step-Up DC-DC Converter General Description The LM2621 is a high efficiency, step-up DC-DC switching regulator for battery-powered and low input voltage systems. It accepts an input voltage between 1.2V and 14V and converts it into a ...
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Connection Diagram Ordering Information Order Number Package Type LM2621MMX Mini SO-8 LM2621MM Mini SO-8 www.national.com Mini SO-8 (MM) Package 10093418 Top View NSC Package Package Drawing Marking MUA08A S06A 3000 Units on Tape and Reel MUA08A S06A 1000 Units on ...
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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. SW Pin Voltage BOOT and FB Pins DD FREQ Pin θ (Note (Note ...
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Pin Description Pin Name 1 PGND Power Ground 2 EN Active-Low Shutdown Input Frequency Adjust. An external resistor connected between this pin and Pin FREQ frequency of the LM2621 Output Voltage Feedback 5 SGND Signal ...
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Typical Performance Characteristics I vs Temperature Switching Frequency vs R (Continued) 10093405 10093407 FQ 10093409 10093406 V vs Load Current IN_ST V = 3.3V OUT 10093408 Peak Inductor ...
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Typical Performance Characteristics Maximum Load Current vs Input Voltage Detailed Description OPERATING PRINCIPLE The LM2621 is designed to provide step-up DC-DC voltage regulation in battery-powered and low-input voltage sys- tems. It combines a step-up switching regulator, N-channel power MOSFET, built-in ...
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Detailed Description (Continued) GATED OSCILLATOR CONTROL SCHEME A unique gated oscillator control scheme enables the LM2621 to have an ultra-low quiescent current and provides a high efficiency over a wide load range. The switching frequency of the internal oscillator is ...
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Design Procedure SETTING THE OUTPUT VOLTAGE The output voltage of the step-up regulator can be set be- tween 1.24V and 14V by connecting a feedback resistive divider made of R and R . The resistor values are se ...
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Application examples U1 National C1 Vishay/Sprague C2 Vishay/Sprague D1 Motorola L Coilcraft EXAMPLE 2. 2mm Tall 5V/0.2A Step-Up Regulator for Low Profile Applications U1 National C1 Vishay/Sprague C2 Vishay/Sprague D1 Motorola L Vishay/Dale EXAMPLE 1. 5V/0.5A Step-Up Regulator LM2621MM 595D226X06R3B2T, ...
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U1 National C1 Vishay/Sprague C2 Vishay/Sprague D1 Motorola L1, L2 Coilcraft C Vishay/Vitramon S www.national.com EXAMPLE 3. 3.3V/0.5A SEPIC Regulator LM2621MM 595D226X06R3B2T, Tantalum 595D686X0010C2T, Tantalum MBRS140T3 DT1608C-682 VJ1210Y105M , Ceramic 10 10093422 ...
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Physical Dimensions inches (millimeters) unless otherwise noted For Order Numbers, refer to the table in the "Ordering Information" section of this document. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied ...