LM3150MH National Semiconductor, LM3150MH Datasheet
LM3150MH
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LM3150MH Summary of contents
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... MOSFET selector, electri- cal simulation, thermal simulation, and Build-It boards for prototyping. Typical Application SIMPLE SWITCHER® registered trademark of National Semiconductor Corporation © 2008 National Semiconductor Corporation ® CONTROLLER, 42V Synchronous Features ■ ...
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... Connection Diagram Ordering Information Order Number Package Type LM3150MH LM3150MHE eTSSOP-14 LM3150MHX Pin Descriptions Pin Name Description Supply Voltage for FET 1 VCC Drivers 2 VIN Input Supply Voltage 3 EN Enable 4 FB Feedback 5,9 SGND Signal Ground 6 SS Soft-Start 7 RON On-time Control 8 ILIM Current Limit ...
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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. VIN, RON to GND SW to GND BST to SW BST to GND Electrical Characteristics junction temperature (T ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical J correlation ...
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Symbol Parameter Regulation and Over-Voltage Comparator V In-Regulation Feedback Voltage FB V Feedback Over-Voltage Threshold FB-OV I Feedback Bias Current FB Boost Diode Forward Voltage V f Thermal Characteristics Thermal Shutdown T SD Thermal Shutdown Hysteresis θ Junction to Ambient ...
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Simplified Block Diagram 5 30053103 www.national.com ...
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Typical Performance Characteristics Boost Diode Forward Voltage vs. Temperature Quiescent Current vs. Temperature t vs. Temperature ON www.national.com I LIM-TH 30053140 Soft-Start Current vs. Temperature 30053142 t ON 30053144 6 vs. Temperature 30053141 30053143 vs. Temperature 30053145 ...
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Temperature ON 30053146 VCC Dropout vs. Temperature 30053148 VCC Current Limit vs. Temperature VCC vs. Temperature 7 30053147 30053149 www.national.com ...
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Theory of Operation The LM3150 synchronous step-down SIMPLE SWITCHER Controller utilizes a Constant On-Time (COT) architecture which is a derivative of the hysteretic control scheme. COT relies on a fixed switch on-time to regulate the output. The on- time of ...
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Where I OUT to-peak inductor ripple current overload condition occurs, the current through the low- side switch will increase which will cause the current limit comparator to trigger the logic to ...
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The soft-start time should be greater than the input voltage rise time and also satisfy the following equality to maintain a smooth transition of the output voltage to the programmed regulation voltage during startup. ≥ ...
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Inductor Designator Inductance (µH) L01 47 L02 33 L03 22 L04 15 L05 10 L06 6.8 L07 4.7 L08 3.3 L09 2.2 L10 1.5 L11 1 L12 0.68 L13 33 L14 22 L15 15 L16 10 L17 6.8 L18 4.7 ...
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Inductor Designator Inductance (µH) L21 1.5 L22 1 L23 0.68 L24 0.47 L25 22 L26 15 L27 10 L28 6.8 L29 4.7 L30 3.3 L31 2.2 L32 1.5 L33 1 L34 0.68 L35 0.47 L36 0.33 L37 22 L38 15 ...
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Determine Output Capacitance Typical hysteretic COT converters similar to the LM3150 re- quire a certain amount of ripple that is generated across the ESR of the output capacitor and fed back to the error com- parator. Emulated Ripple Mode ...
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FET charged during the SW off-time. The rec- ommended value for C is 0.47 µF. The EN bypass capac- BST Design Example 1. Define Power Supply Operating Conditions 3.3V OUT 6V, ...
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For this design the chosen ripple current ratio 0.3, repre- sents the ratio of inductor peak-to-peak current to load current good ...
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Pdl = Iout (1-D) = 122 x 0.01 x (1-0.275 DS(ON) Pdl is also less than the Pdmax specified on the RJK0305DPB MOSFET datasheet. However not always necessary to use the same ...
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... DS(ON) 1%, 0.125W 1%, 0.125W 1%, 0.125W 1%, 0.125W National Semiconductor 17 Manufacturer Part Number TDK C2012X7R1C474K TDK C2012X7R1H104K TDK C1608X7R1H102K VJ0805A271JXACW1BC Taiyo Yuden GMK325BJ106KN-T Panasonic EEF-UE0J151R Vishay VJ0805Y683KXXA Kemet C0805C105K4RACTU Coilcraft HA3778–AL Renesas RJK0305DPB Vishay-Dale CRCW08054k99FKEA Vishay-Dale CRCW080522k6FKEA Vishay-Dale CRCW08051K91FKEA Vishay-Dale CRCW080556K2FKEA LM3150MH www.national.com ...
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PCB Layout Considerations It is good practice to layout the power components first, such as the input and output capacitors, FETs, and inductor. The first priority is to make the loop between the input capacitors and the source of the ...
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Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead eTSSOP Package NS Package Number MXA14A 19 www.national.com ...
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