P

OUT

OUT

1

F

2

L

C

=

p

´

OUT

R1

V

0.765

1

R2

æ

ö

=

´

+

ç

÷

è

ø

10µF

C3

22µF

C6

22µF

C7

L1

2.2uH

10µF

C2

0.1µF

C1

10.0k

R2

3.74k

R1

0.1µF

C5

22µF

C8

10.0k

R3

GND

1

SW

2

VIN

3

PG

4

SS

5

VFB

6

EN

7

VBST

8

U1

TPS562210DDF

8200pF

C4

100k

R4

VIN = 4.5 - 17 V

VOUT = 1.05 V, 2 A

VOUT

EN

VIN

PG

TPS562210, TPS563210

SLVSCM6A – FEBRUARY 2015 – REVISED AUGUST 2015

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The TPS562210 and TPS563210 are typically used as step down converters, which convert a voltage from 4.5 V

to 17 V to a lower voltage. Webench software is available to aid in the design and analysis of circuits.

9.2 Typical Application

9.2.1 TPS562210 4.5-V to 17-V Input, 1.05-V output Converter

Figure 18. TPS562210 1.05V/2A Reference Design

9.2.1.1 Design Requirements

For this design example, use the parameters shown in Table 1.

Table 1. Design Parameters

PARAMETER

VALUES

Input voltage range

4.5 V to 17 V

Output voltage

1.05 V

Output current

2 A

Output voltage ripple

20 mVp-p

9.2.1.2 Detailed Design Procedure

9.2.1.2.1

Output Voltage Resistors Selection

The output voltage is set with a resistor divider from the output node to the VFB pin. It is recommended to use

To improve efficiency at light loads consider using larger value resistors, too high of resistance are more

susceptible to noise and voltage errors from the VFB input current are more noticeable.

(3)

9.2.1.2.2

Output Filter Selection

The LC filter used as the output filter has double pole at:

(4)

14

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