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LM2710MTX-ADJ Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM2710MTX-ADJ Datasheet(HTML) 3 Page - National Semiconductor (TI) |
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3 / 20 page  Pin Functions V SW(Pin 1): This is the drain of the internal NMOS power switch. Minimize the metal trace area connected to this pin to minimize EMI. V IN(Pin 2): Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. The capacitor should connect between V IN and GND. SHDN(Pin 3): Shutdown Pin. The shutdown pin signal is active low. A voltage of less than 0.3V disables the device. A voltage greater than 0.85V enables the device. FSLCT(Pin 4): Frequency Select Pin. Connecting FSLCT to AGND selects a 600 kHz operating frequency for the switch- ing regulator. Connecting FSLCT to V IN selects a 1.25 MHz operating frequency. If FSLCT is left floating, the switching frequency defaults to 600 kHz. Vs+(Pin 5): Supply pin for the Vcom buffer and the four Gamma buffers. Bypass this pin with a capacitor as close to the device as possible. The capacitor should connect be- tween Vs+ and GND. Vcom-in(Pin 6): Vcom Buffer input pin. GMA1-in(Pin 7): Gamma Buffer input pin. GMA2-in(Pin 8): Gamma Buffer input pin. GMA3-in(Pin 9): Gamma Buffer input pin. GMA4-in(Pin 10): Gamma Buffer input pin. GMA4-out(Pin 11): Gamma Buffer output pin. GMA3-out(Pin 12): Gamma Buffer output pin. GMA2-out(Pin13): Gamma Buffer output pin. GMA1-out(Pin 14): Gamma Buffer output pin. Vcom-out(Pin 15): Vcom Buffer output pin. SS(Pin 16): Softstart pin. Connect capacitor to SS pin and AGND to slowly ramp inductor current on startup. V C(Pin 17): Compensation Network for Boost switching regulator. Connect resistor/capacitor network between V C pin and AGND for boost switching regulator AC compensa- tion. FB(Pin 18): Feedback pin. Set the output voltage by select- ing values of R1 and R2 using: Connect the ground of the feedback network to the AGND plane, which can be tied directly to the GND pin. AGND(Pin 19): Analog ground pin. Ground connection for the Vcom buffer, Gamma buffers and the boost switching regulator. AGND must be tied directly to GND at the pins. GND(Pin 20): Power ground pin. Ground connection for the NMOS power device of the boost switching regulator. GND must be tied directly to AGND at the pins. Ordering Information Order Number Package Type NSC Package Drawing Supplied As LM2710MT-ADJ TSSOP-20 MTC20 73 Units, Rail LM2710MTX-ADJ TSSOP-20 MTC20 2500 Units, Tape and Reel www.national.com 3 |
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