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TPS54361DPRT Datasheet(PDF) 3 Page - Texas Instruments |
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TPS54361DPRT Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 51 page  BOOT VIN EN SS/TR RT/CLK PWRGD SW GND COMP FB 10 9 1 2 3 4 5 8 7 6 3 TPS54361 www.ti.com SLVSC39C – NOVEMBER 2013 – REVISED FEBRUARY 2016 Product Folder Links: TPS54361 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions DPR Package 10-Pin WSON With Thermal Pad Top View Pin Functions PIN I/O DESCRIPTION NAME NO. BOOT 1 I A bootstrap capacitor is required between the BOOT and SW pin. If the voltage on this capacitor is below the minimum required to turn on the high-side MOSFET, the gate drive is switched off until the capacitor is refreshed. COMP 7 I This pin is the error amplifier output and input to the output switch current (PWM) comparator. Connect frequency compensation components to this pin. EN 3 I This pin is the enable pin. An internal pullup current source enables the TPS54361 if the EN pin is floating. Pull EN below 1.2 V to disable. Adjust the input undervoltage lockout with two resistors. See Enable and Adjusting Undervoltage Lockout. FB 6 I This pin is the inverting input of the transconductance (gm) error amplifier. GND 8 – Ground PWRGD 10 O The Power Good pin is an open drain output that asserts low if the output voltage is out of regulation because of thermal shutdown, dropout, overvoltage, or EN shutdown. RT/CLK 5 I This pin is the resistor timing and external clock pin. 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, 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 operating mode returns to resistor frequency programming. SS/TR 4 I This pin is the soft start and tracking pin. An external capacitor connected to this pin sets the output rise time. Because the voltage on this pin overrides the internal reference, the SS/TR pin can be used for tracking and sequencing. SW 9 O The SW pin is the source of the internal high-side power MOSFET and switching node of the converter. VIN 2 I Connect to this pin the input voltage supply with a 4.5-V to 60-V operating range. Thermal Pad – The GND pin must be electrically connected to the exposed pad on the printed circuit board for proper operation. |
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