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LMZ14202EXTTZE bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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LMZ14202EXTTZE bảng dữ liệu(HTML) 3 Page - Texas Instruments |
3 / 27 page Exposed Pad Connect to GND 5 SS 6 FB 3 EN 1 VIN 2 RON 4 GND 7 VOUT VIN CIN Enable RON RFBT CFF CSS RFBB COUT LMZ14202EXT VOUT @ 2A LMZ14202EXT www.ti.com SNVS665E – JUNE 2010 – REVISED APRIL 2013 Simplified Application Schematic Connection Diagram Figure 2. Top View 7-Lead PFM PIN DESCRIPTIONS Pin Name Description 1 VIN Supply input — Nominal operating range is 6V to 42V . A small amount of internal capacitance is contained within the package assembly. Additional external input capacitance is required between this pin and exposed pad. 2 RON On Time Resistor — An external resistor from VIN to this pin sets the on-time of the application. Typical values range from 25k to 124k ohms. 3 EN Enable — Input to the precision enable comparator. Rising threshold is 1.18V nominal; 90 mV hysteresis nominal. Maximum recommended input level is 6.5V. 4 GND Ground — Reference point for all stated voltages. Must be externally connected to EP. 5 SS Soft-Start — An internal 8 µA current source charges an external capacitor to produce the soft-start function. This node is discharged at 200 µA during disable, over-current, thermal shutdown and internal UVLO conditions. 6 FB Feedback — Internally connected to the regulation, over-voltage, and short-circuit comparators. The regulation reference point is 0.8V at this input pin. Connected the feedback resistor divider between the output and ground to set the output voltage. 7 VOUT Output Voltage — Output from the internal inductor. Connect the output capacitor between this pin and exposed pad. EP EP Exposed Pad — Internally connected to pin 4. Used to dissipate heat from the package during operation. Must be electrically connected to pin 4 external to the package. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Copyright © 2010–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LMZ14202EXT |
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