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LM20125 датащи(PDF) 9 Page - Texas Instruments |
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LM20125 датащи(HTML) 9 Page - Texas Instruments |
9 / 28 page 7.4A + - COMP CONTROL LOGIC CURRENT LIMIT OVERVOLTAGE UNDERVOLTAGE ERROR AMP PWM COMPARATOR SS/TRK PGOOD + - +2.7V REGULATOR PVIN PVIN THERMAL PROTECTION PGND SW AVIN CURRENT SENSE VCC 1.18V UVLO 2.7V AGND OSCILLATOR + 752 mV 864 mV PG-L PG-L 2.7V 5 PA gm = 510 Pmho 800 mV + - + DISCHARGE DISCHARGE SLOPE COMP DIODE EMULATION + - VREF + - FB EN + - + - (50 Ps) + - + - PVIN LM20125 www.ti.com SNVS525E – OCTOBER 2007 – REVISED MARCH 2013 BLOCK DIAGRAM OPERATION DESCRIPTION GENERAL The LM20125 switching regulator features all of the functions necessary to implement an efficient low voltage buck regulator using a minimum number of external components. This easy to use regulator features two integrated switches and is capable of supplying up to 5A of continuous output current. The regulator utilizes peak current mode control with nonlinear slope compensation to optimize stability and transient response over the entire output voltage range. Peak current mode control also provides inherent line feed-forward, cycle-by-cycle current limiting and easy loop compensation. The fixed 500 kHz operating frequency minimizes the inductor size while still achieving efficiencies up to 96%. The precision internal voltage reference allows the output to be set as low as 0.8V. Fault protection features include: current limiting, thermal shutdown, over voltage protection, and shutdown capability. The device is available in the HTSSOP 16-pin package featuring an exposed pad to aid thermal dissipation. The LM20125 can be used in numerous applications to efficiently step-down from a 5V or 3.3V bus. The typical application circuit for the LM20125 is shown in Figure 25 in the design guide. Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM20125 |
Аналогичный номер детали - LM20125_15 |
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Аналогичное описание - LM20125_15 |
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