LM26400YMH NSC [National Semiconductor], LM26400YMH Datasheet
LM26400YMH
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LM26400YMH Summary of contents
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LM26400Y Dual 2A, 500kHz Wide Input Range Buck Regulator General Description The LM26400Y is a monolithic, two-output fixed frequency PWM step-down DC/DC regulator in a 16-pin LLP or thermally enhanced ETSSOP package. With a minimum number of ex- ternal components ...
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... Connection Diagrams 16-Lead ETSSOP (top view) NS Package Drawing MXA16A Ordering Information Order Number LM26400YMH LM26400YMHX LM26400YSD LM26400YSDX www.national.com 20200202 NSC Package Package Type Supplied As Drawing ETSSOP-16 MXA16A Rail of 92 Units ETSSOP-16 MXA16A 2500 Units on Tape and Reel LLP-16 SDA16A 1000 Units on Tape and Reel ...
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Pin Descriptions Pin Name 1 FB1 2 SS1 3 EN1 4 AVIN 5 GND 6 EN2 7 SS2 8 FB2 9 BST2 10 SW2 11, 12, 13,14 PVIN 15 SW1 16 BST1 DAP Die Attach Pad Description Feedback pin of ...
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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. AVIN, PVIN SWx Voltage BSTx Voltage BSTx to SW Voltage FBx Voltage ENx Voltage (Note 2) Electrical Characteristics Unless ...
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Symbol Parameter Difference Between SS1 and ΔI SS SS2 Currents FB1 and FB2 Frequency Fold- V FB_F back Threshold Thermal Characteristics Symbol Description Junction-to-Ambient Thermal θ JA Resistance (Note 4) Junction-to-Case-Bottom θ JC Thermal Resistance Thermal Shutdown T SD Threshold ...
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Typical Performance Characteristics C for efficiency curves, loop gain plots and waveforms, and T Efficiency, V OUT Efficiency, V OUT AVIN Shutdown Current vs. Temperature www.national.com Unless otherwise specified or thermal-shutdown related 25°C for all others ...
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Switching Frequency vs. Temperature 20200207 Feedback Voltage vs 20200209 SS-Pin Current vs. Temperature 20200278 Feedback Voltage vs. Temperature Frequency Foldback FET R vs. Temperature DS_ON 7 20200208 20200210 20200221 www.national.com ...
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Switch Current Limit vs. Temperature Loop Gain, DCM Loop Gain, DCM www.national.com Loop Gain, CCM 20200234 Loop Gain, CCM 20200220 Load Step Response 20200222 8 20200219 20200236 20200223 ...
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Load Step Response 20200224 Start-Up (No Load) 20200228 Shutdown 20200229 Line Transient Response Start-Up (No Load) Thermal Shutdown 9 20200227 20200239 20200230 www.national.com ...
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Recovery from Thermal Shutdown Short-circuit Release www.national.com Short-circuit Triggering 20200240 20200232 10 20200231 ...
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Block Diagram 11 20200204 www.national.com ...
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Application Hints GENERAL The LM26400Y is a dual PWM peak-current mode buck reg- ulator with two integrated power MOSFET switches. The part is designed to be easy to use. The two regulators are mostly identical and share the same input ...
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See the section LOAD STEP RESPONSE for more details on C When one channel gets into over-current protection mode, the operation of the other channel will not be affected. LOOP STABILITY To the first ...
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This usually happens when the load toggles high at the time V just ramps down to its regulation level from an OUT overshoot. Figure 4 shows such a case where the load tog- gles between 1.7A and only 50mA. ...
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House keeping loss is: Finally the total power loss in the LM26400Y is: PROGRAMMING OUTPUT VOLTAGE First make sure the required maximum duty cycle in steady state is less than 80% so that the regulator will not lose reg- ulation. ...
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Choose a 5µ ferrite core inductor that has a saturation current around 3A at room temperature. For example, Sumida's CDRH6D26NP-5R0NC. If the maximum load current is significantly lower than 2A, pick an inductor with the same saturation rating ...
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R is the winding resistance of the inductor resistance of the MOSFET switch. Example 5V 3.3V 2A OUT1 OUT1 OUT2 = 30mΩ 170mΩ the same ...
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If a thermal couple has to be used, try to locate the hottest spot on the case-top first and then secure the thermal couple at exactly ...
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... MBRS230LT3G SMB MBRS230LT3G 7x7x2 CDRH6D26NP-5R0NC 7x7x4 mm 3 CDRH6D38NP-8R7NC 0402 CRCW040210R0FK 0402 CRCW04025K90FK 0402 CRCW04025K90FK 0402 CRCW040218K7FK 0402 CRCW04025K90FK ETSSOP-16 LM26400YMH 19 20200253 Manufacturer Murata Taiyo Yuden TDK TDK Murata Murata Kemet Kemet Kemet Kemet ON Semiconductor ON Semiconductor Sumida Sumida Vishay Vishay Vishay ...
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... MBRS230LT3G SMB MBRS230LT3G 8.3x8.3x4 mm 3 CDRH8D38NP-100NC 8.3x8.3x4 mm 3 CDRH8D43/HP-150NC 0402 CRCW040210R0FK 0402 CRCW040226K7FK 0402 CRCW04025K90FK 0402 CRCW040218K7FK 0402 CRCW04025K90FK ETSSOP-16 LM26400YMH 20 Manufacturer Murata Taiyo Yuden TDK TDK Murata Murata Kemet Kemet Kemet Kemet ON Semiconductor ON Semiconductor Sumida Sumida Vishay Vishay Vishay ...
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... MBRS230LT3G SMB MBRS230LT3G 7x7x2 CDRH6D26NP-5R0NC 7x7x2 CDRH6D26NP-5R0NC 0402 CRCW040210R0FK 0402 CRCW04025K90FK 0402 CRCW04025K90FK 0402 CRCW040211K8FK 0402 CRCW04025K90FK ETSSOP-16 LM26400YMH 21 20200255 Manufacturer Murata Taiyo Yuden TDK TDK Murata Murata Kemet Kemet Kemet Kemet ON Semiconductor ON Semiconductor Sumida Sumida Vishay Vishay Vishay ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 16-Lead ETSSOP Package NS Package Number MXA16A 16-Lead LLP Package NS Package Number SDA16A 22 ...
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Notes 23 www.national.com ...
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THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE ...