LM5115MTC/NOPB National Semiconductor, LM5115MTC/NOPB Datasheet
LM5115MTC/NOPB
Specifications of LM5115MTC/NOPB
*LM5115MTC/NOPB
LM5115MTC
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LM5115MTC/NOPB Summary of contents
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... Typical Application Circuit FIGURE 1. Simplified Multiple Output Power Converter Utilizing SSPR Technique © 2006 National Semiconductor Corporation Features n Self-synchronization to main channel output n Standalone DC/DC Synchronous buck mode n Leading edge pulse width modulation ...
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Connection Diagram 16-Lead TSSOP See NS Package Numbers MTC16 Ordering Information Ordering Number Package Type LM5115MTC TSSOP-16 LM5115MTCX TSSOP-16 LM5115SD LM5115SDX Pin Descriptions Pin Name Description 1 CS Current Sense amplifier positive input 2 VOUT Current sense amplifier negative input ...
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Pin Descriptions (Continued) Pin Name Description 10 PGND Power Ground 11 LO Low side gate driver output 12 VCC Output of bias regulator 13 HS High side MOSFET source connection 14 HO High side gate driver output 15 HB High ...
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Block Diagram www.national.com 4 20134903 ...
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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. VBIAS to GND VCC to GND HS to GND VOUT GND All other inputs to GND Storage Temperature Range Junction Temperature PARAMETER Supply Voltage, VBIAS ...
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Electrical Characteristics or HO. (Continued) SYMBOL PARAMETER CURRENT LIMIT ILIMIT Amp Transconductance Overall Transconductance Positive Current Limit Positive Current Limit Foldback VCLneg Negative Current Limit RAMP GENERATOR SYNC Input Impedance SYNC Threshold Free Run Mode Peak Threshold Current Mirror Gain ...
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Typical Performance Characteristics Efficiency vs. Load Current and Vphase Current Value (CV) vs. Current Limit (V Current Error Amplifier Transconductance V Regulator Start-up Characteristics 20134922 ) Current Sense Amplifier Gain and Phase vs. Frequency CL 20134906 Overall Current ...
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Typical Performance Characteristics Common Mode Output Voltage vs. Positive Current Limit V Load Regulation to Current Limit CC www.national.com (Continued) Common Mode Output Voltage vs. Negative Current Limit (Room Temp) 20134910 20134905 8 20134911 ...
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Detailed Operating Description The LM5115 controller contains all of the features necessary to implement multiple output power converters utilizing the Secondary Side Post Regulation (SSPR) technique. The SSPR technique develops a highly efficient and well regu- lated auxiliary output from ...
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Synchronization (SYNC) and Feed-Forward (RAMP) lation is improved because the PWM duty cycle of the aux- iliary converter is immediately corrected, independent of the delays of the voltage regulation loop. The recommended SYNC input current range is 50µA to 150µA. ...
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Error Amplifier and Soft-Start (FB, CO, & COMP, SS) (Continued) fier is configured as an open drain output it can be disabled by connecting FB to ground. The current sense amplifier and current limiting function will be described in a ...
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Voltage Mode Control with Current Injection The LM5115 controller uniquely combines elements and benefits of current mode control in a voltage mode PWM controller. The current sense amplifier shown in Figure 6 monitors the inductor current as it flows through ...
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Voltage Mode Control with Current Injection Current Limiting (CS, CO and VOUT) Current limiting is implemented through the current sense amplifier as illustrated in Figure 6. The current sense ampli- fier monitors the inductor current that flows through a sense ...
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Gate Drivers Outputs (HO & LO) (Continued) side MOSFET. The high side pulse is terminated when the phase signal falls and SYNC input comparator resets the PWM latch. Thermal Protection Internal thermal shutdown circuitry is provided to protect the integrated ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted TSSOP-16 Outline Drawing NS Package Number MTC16 LLP-16 Outline Drawing NS Package Number SDA16A 16 ...
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