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TPS57140-EP Datasheet(PDF) 3 Page - Texas Instruments |
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TPS57140-EP Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 51 page  1 2 3 4 10 9 8 7 4 6 5 Exposed Thermal Pad BOOT VIN EN SS/TR RT/CLK PH GND COMP VSENSE PWRGD TPS57140-EP www.ti.com SLVSD01A – SEPTEMBER 2015 – REVISED SEPTEMBER 2015 5 Pin Configuration and Functions DRC Package 10-Pin VSON Top View Pin Functions PIN I/O DESCRIPTION NAME NO. The device requires a bootstrap capacitor between BOOT and PH. A voltage on this capacitor below the BOOT 1 O minimum required by the output device forces the output to switch off pending a refresh of the capacitor. 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 UVLO 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. Pulling the pin above the PLL upper threshold RT/CLK 5 I causes a mode change whereby the pin becomes a synchronization input. Disabling of the internal amplifier occurs, and the pin is a high-impedance clock input to the internal PLL. If clocking edges stop, re-enabling of the internal amplifier occurs, 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. The voltage on SS/TR 4 I this pin overrides the internal reference, allowing use of the pin for tracking and sequencing. VIN 2 I Input supply voltage, 3.5 to 42 V VSENSE 7 I Inverting node of the transconductance (gm) error amplifier GND pin must have an electrical connection to the exposed pad on the printed-circuit board for proper Thermal pad — — operation. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: TPS57140-EP |
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