VI

GND

EN

SW

FB

C1

4.7 mF

L1

10 mH

C2

10 mF

TPS62200

VI

2.5 V − 6 V

VO

1.8 V / 300 mA

R1

R2

Cff

TPS62200, TPS62201, TPS62202, TPS62203

TPS62204, TPS62205, TPS62207, TPS62208

www.ti.com

SLVS417F – MARCH 2002 – REVISED JUNE 2015

9 Power Supply Recommendations

The TPS6220x device family has no special requirements for its input power supply. The input power supply's

output current needs to be rated according to the supply voltage, output voltage, and output current of the

TPS6220x.

10 Layout

10.1 Layout Guidelines

•

For all switching power supplies, the layout is an important step in the design, especially at high peak

currents and switching frequencies. If the layout is not carefully done, the regulator shows stability problems

as well as EMI problems.

•

Therefore use wide and short traces for the main current paths, as indicated in bold in Figure 19. The input

capacitor should be placed as close as possible to the IC pins.

•

The feedback resistor network must be routed away from the inductor and switch node to minimize noise and

magnetic interference. To further minimize noise from coupling into the feedback network and feedback pin,

the ground plane or ground traces must be used for shielding. This becomes very important especially at high

switching frequencies of 1 MHz.

10.2 Layout Example

Figure 19. Layout Diagram

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Product Folder Links: TPS62200 TPS62201 TPS62202 TPS62203 TPS62204 TPS62205 TPS62207 TPS62208