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TPS5401DGQ Fiches technique(PDF) 5 Page - Texas Instruments |
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TPS5401DGQ Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 41 page 1 2 3 4 5 6 7 9 8 10 Thermal Pad (11) BOOT VIN EN PH GND COMP VSENSE PWRGD SS/TR RT/CLK MSOP10 (TOP VIEW) TPS5401 www.ti.com SLVSAB0 – DECEMBER 2010 DEVICE INFORMATION PIN CONFIGURATION PIN FUNCTIONS PIN I/O DESCRIPTION NAME NO. A bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor is below the BOOT 1 O minimum required by the output device, the output is forced to switch off until the capacitor is refreshed. Error amplifier output, and input to the output switch current comparator. Connect frequency compensation COMP 8 O components to this pin. Enable pin, internal pullup current source. Pull below 1.2 V to disable. Float to enable. Adjust the input EN 3 I undervoltage lockout with two resistors. GND 9 – Ground PH 10 I The source of the internal high-side power MOSFET An open-drain output; asserts low if output voltage is low due to thermal shutdown, dropout, overvoltage or PWRGD 6 O EN shutdown. Resistor timing and external clock. An internal amplifier holds this pin at a fixed voltage when using an external resistor to ground to set the switching frequency. If the pin is pulled above the PLL upper threshold, RT/CLK 5 I a mode change occurs and the pin becomes a synchronization input. The internal amplifier is disabled and the pin is a high-impedance clock input to the internal PLL. If clocking edges stop, the internal amplifier is re-enabled and the mode returns to a resistor-set function. Slow-start and tracking. An external capacitor connected to this pin sets the output rise time. Because the SS/TR 4 I voltage on this pin overrides the internal reference, it can be used for tracking and sequencing. Thermal pad (11) – GND pin must be electrically connected to the thermal pad on the printed circuit board for proper operation. VIN 2 I Input supply voltage, 3.5 V to 42 V. VSENSE 7 I Inverting node of the transconductance (gm) error amplifier. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS5401 |
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