L

0.47 H

m

MODE/SYNC

SW

FB

VIN

V

IN

2.75 V -

V

6

C

IN

22 mF

C

OUT

47 F

m

TPS62810-Q1

EN

3.3 V

GND

PG

SS/TR

COMP/FSET

4.7 nF

10 pF

L

0.47 H

m

MODE/SYNC

SW

FB

VIN

C

IN

22 mF

C

OUT

47 F

m

TPS62810-Q1

EN

R

5

1.8 V

R

6

GND

PG

SS/TR

COMP/FSET

10 pF

Device 1 (master)

Device 2 (slave)

EN

Figure 10-58. Schematic for Output Voltage Tracking

Figure 10-59. Scope Plot for Output Voltage Tracking

10.3.3 Synchronizing to an External Clock

The TPS6281x-Q1 can be externally synchronized by applying an external clock on the MODE/SYNC pin.

There is no need for any additional circuitry as long as the input signal meets the requirements given in the

electrical specifications. The clock can be applied / removed during operation, allowing you to switch from an

externally-defined fixed frequency to power-save mode or to internal fixed frequency operation. The value of the

RCF resistor must be chosen so that the internally defined frequency and the externally applied frequency are

close to each other. This ensures a smooth transition from internal to external frequency and vice versa.

www.ti.com

TPS62810-Q1, TPS62811-Q1, TPS62812-Q1, TPS62813-Q1

SLVSDU1J – AUGUST 2018 – REVISED MARCH 2023

Copyright © 2023 Texas Instruments Incorporated

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