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TPS5430 Series Datasheet

TPS5430

Step-Down Converter

The TPS5430 is a Step-Down Converter that integrates a low-resistance, high-side N-channel MOSFET. an undervoltagelockout circuit to prevent start-up until the input voltage reaches 5.5 V; an internally set slow-start circuit to limit inrush currents; and a voltage feedforward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18 μA typically. Other features include an active-high enable, over-voltage protection and thermal shutdown.

TPS5430 Data sheet.pdf

TPS5430 Pin Configuration and Function

Pin No	Function	Description
1	BOOT	Boost capacitor for the high-side FET gate driver. Connect 0.01 μF low ESR capacitor from BOOT pin to PH pin.
2, 3	NC	Not connected internally.
4	VSENSE	Feedback voltage for the regulator. Connect to output voltage divider.
5	ENA	On/off control. Below 0.5 V, the device stops switching. Float the pin to enable.
6	GND	Ground. Connect to PowerPAD.
7	VIN	Input supply voltage. Bypass VIN pin to GND pin close to device package with a high quality, low ESR ceramic capacitor.
8	PH	Source of the high side power MOSFET. Connected to external inductor and diode.
	PowerPAD	GND pin must be connected to the exposed pad for proper operation.