TPS22915BYFPR

The Texas Instruments TPS22915BYFPR is a small, low on-resistance single-channel load switch with controlled slew rate and quick output discharge. The device integrates an N-channel MOSFET that operates over a wide input voltage range of 1.05V to 5.5V and supports up to 2A of continuous current. The controlled rise time significantly reduces inrush current caused by large bulk load capacitances, minimizing power supply droop. The integrated 143-ohm pulldown resistor provides quick output discharge when the switch is turned off, ensuring a predictable power-down sequence. The ultra-small 0.74 x 0.74mm DSBGA package makes it ideal for space-constrained battery-powered applications.

The TPS22915BYFPR operates as an integrated load switch with four key functional blocks: 1) N-Channel MOSFET: The main switching element connects VIN to VOUT when enabled, with a low 37mohm on-resistance at 5V. The gate drive is internally generated to ensure full enhancement of the MOSFET. 2) Controlled Slew Rate: The gate drive voltage is ramped at a controlled rate, producing a rise time of approximately 64us (B version) at 3.3V, which limits the inrush current into downstream capacitors and prevents supply voltage droop. 3) Quick Output Discharge (QOD): When the switch is disabled, an integrated 143-ohm pulldown resistor connects the output to ground, rapidly discharging any load capacitance and ensuring a clean power-down. 4) Control Logic: The ON pin accepts low-voltage GPIO signals (compatible with 1V logic), enabling direct control from modern low-voltage processors.

• Power rail sequencing and switching in smartphones and tablets
• Wearable device power management with tight space constraints
• IoT sensor modules requiring controlled power-up/down
• Battery-powered systems with multiple voltage domains
• Portable electronics needing inrush current limiting