LM2621MMX National Semiconductor, LM2621MMX Datasheet
LM2621MMX
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LM2621MMX Summary of contents
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... SO and has a height of just 1.09 mm. Features n Small Mini-SO8 Package (Half the Footprint of Standard 8-Pin SO Package) Typical Application Circuit © 2005 National Semiconductor Corporation n 1.09 mm Package Height MHz Switching Frequency n 1.2V to 14V Input Voltage n 1.24V - 14V Adjustable Output Voltage Load Current n 0.17 Ω ...
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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 Tape and Reel 2 Supplied As ...
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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 2) Jmax Storage Temperature Range Lead Temp. (Soldering, 5 sec) Electrical Characteristics Limits in standard typeface are for T J − ...
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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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