Overview
The TPS22913 is a compact, high-efficiency load switch from Texas Instruments, designed to manage power distribution in space-constrained electronic systems. It integrates a low-resistance MOSFET and control circuitry to minimize voltage drop and power loss. Commonly used in smartphones, tablets, and IoT devices, it enables efficient power gating for subsystems. With a typical on-resistance of 20mΩ, the TPS22913 reduces energy waste during operation. Its fast turn-on/turn-off times (microsecond range) make it suitable for applications requiring rapid power cycling. The device operates from 1V to 5.5V, accommodating diverse battery configurations.
Structure and Working Principle
The TPS22913 combines a N-channel MOSFET with a charge pump and logic control in a single chip. When enabled, the charge pump drives the MOSFET gate to achieve full enhancement, minimizing conduction losses. An integrated slew-rate controller prevents inrush currents during turn-on. The device includes protection features like thermal shutdown and undervoltage lockout. Its quiescent current (typically 1µA) ensures minimal impact on battery life in standby modes. The small DSBGA or WSON package options (as small as 0.8mm × 0.8mm) suit high-density PCB designs.
Key Features
Ultra-low on-resistance (20mΩ typical) significantly reduces power dissipation compared to discrete solutions. The device supports up to 3A continuous current, with surge capability for capacitive loads. Fast switching (10µs typical turn-on) enables quick power state transitions. A configurable slew rate (via external capacitor) allows tuning for specific load requirements. The TPS22913 also offers reverse current blocking when disabled, protecting upstream power sources. Its wide operating temperature range (-40°C to +85°C) ensures reliability in harsh environments.
Application Areas
Primary applications include battery-powered portable electronics where energy efficiency is critical. It's commonly used to power sensors, memory modules, or peripherals in smartphones and wearables. Industrial uses include power sequencing in embedded systems and PLCs. In IoT devices, the TPS22913 enables selective power-down of unused subsystems to extend battery life. Automotive infotainment systems employ it for controlled power distribution to secondary components. Medical devices benefit from its low leakage current in sleep modes.
Maintenance and Precautions
No routine maintenance is required for the TPS22913, but proper PCB layout is essential. Place bypass capacitors close to the input pins, and use adequate thermal vias for high-current applications. Avoid exceeding absolute maximum ratings (6V input voltage, 4A peak current). ESD precautions should be followed during handling—the device is sensitive to HBM Class 2 (2000V). For reliability, operate within the recommended junction temperature range. In fault conditions, the thermal shutdown feature automatically disables the switch until temperatures normalize.
B2B Procurement Guide
When sourcing TPS22913 units, verify authenticity through authorized distributors like Arrow, Avnet, or TI Direct. Minimum order quantities typically start at 3,000 units for volume pricing. Lead times vary from stock availability to 8–12 weeks for large custom orders. Evaluate alternative part numbers (e.g., TPS22913A for different enable logic) if design flexibility exists. Request samples for prototype testing—Texas Instruments often provides evaluation modules. For long-term projects, consider securing annual purchase agreements to stabilize pricing and availability.
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