TPS22971 Datasheet, PDF (12/20 Pages) Texas Instruments – 3.6-V, 3-A, 7.5-m(ohm) On-Resistance Load Switch With Adjustable Fast Turnon and Power Good

TPS22971
SLVSDK7 – APRIL 2017
www.ti.com
10 Power Supply Recommendations
The device is designed to operate from a VIN range of 0.65 V to 3.6 V. The VIN power supply must be well
regulated and placed as close to the device terminal as possible. The power supply must be able to withstand all
transient load current steps. In most situations, using an input capacitance of 1 µF is sufficient to prevent the
supply voltage from dipping when the switch is turned on. In cases where the power supply is slow to respond to
a large transient current or large load current step, additional bulk capacitance may be required on the input.
The requirements for larger input capacitance can be mitigated by adding additional capacitance to the CT pin.
This causes the load switch to turn on more slowly. Not only does this reduce transient inrush current, but it also
gives the power supply more time to respond to the load current step.
11 Layout
11.1 Layout Guidelines
All traces must be as short as possible for best performance. Using wide traces for V_IN, V_OUT, and GND helps
minimize the parasitic electrical effects along with minimizing the case to ambient thermal impedance.
11.2 Layout Example
Figure 5. Package Layout Examples
12
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