10µF

C3

22µF

C6

22µF

C7

L1

1.5uH

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

TPS563210DDF

8200pF

C4

100k

R4

VIN = 4.5 - 17 V

VOUT = 1.05 V, 3 A

VOUT

EN

VIN

PG

TPS562210, TPS563210

www.ti.com

SLVSCM6A – FEBRUARY 2015 – REVISED AUGUST 2015

The following application curves were generated using the application circuit of Figure 18.

9.2.2 TPS563210 4.5-V To 17-V Input, 1.05-V Output Converter

Figure 33. TPS563210 1.05 V / 3A Reference Design

9.2.2.1

Design Requirements

For this design example, use the parameters shown in Table 3.

Table 3. Design Parameters

PARAMETER

VALUE

Input voltage range

4.5 V to 17 V

Output voltage

1.05 V

Output current

3 A

Output voltage ripple

20 mVpp

9.2.2.2 Detailed Design Procedures

The detailed design procedure for TPS563210 is the same as for TPS562210 except for inductor selection.

9.2.2.2.1

Output Filter Selection

Table 4. TPS563210 Recommended Component Values

L1 (µH)

Output Voltage (V)

R2 (k

Ω)

R3 (k

Ω)

C6 + C7 + C8 (µF)

MIN

TYP

MAX

1

3.09

10.0

1.0

1.5

4.7

20 - 68

1.05

3.74

10.0

1.0

1.5

4.7

20 - 68

1.2

5.76

10.0

1.0

1.5

4.7

20 - 68

1.5

9.53

10.0

1.0

1.5

4.7

20 - 68

1.8

13.7

10.0

1.5

2.2

4.7

20 - 68

2.5

22.6

10.0

1.5

2.2

4.7

20 - 68

3.3

33.2

10.0

1.5

2.2

4.7

20 - 68

5

54.9

10.0

2.2

3.3

4.7

20 - 68

6.5

75

10.0

2.2

3.3

4.7

20 - 68

The inductor peak-to-peak ripple current, peak current and RMS current are calculated using Equation 9,

Equation 10 and Equation 11. The inductor saturation current rating must be greater than the calculated peak

current and the RMS or heating current rating must be greater than the calculated RMS current. Use 650 kHz for

current of Equation 11.

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