TPS64200,TPS64201

TPS64202,TPS64203

SLVS485 − AUGUST 2003

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5

TYPICAL CHARACTERISTICS

All graphs were generated using the circuit as shown unless otherwise noted. For output voltages other than

3.3 V, the output voltage divider was changed accordingly. Graphs for the TPS64203 were taken using the

application circuit shown in Figure 25.

SW

CDRH 103R−100

Si5447DC

MBRM120LT3

EN

GND

FB

VIN

ISENSE

VI

CI

10

µF

X7R

TPS6420x

R(ISENSE) = 33 mΩ

R1

620 k

Ω

R2

360 k

Ω

Cff

4.7 pF

Co

47

µF PosCap

6TPA47M

VO

1

2

3

6

5

4

10

µH

Figure 1. Basic Application Circuit For a 2-A Step-Down Converter

TABLE OF GRAPHS

FIGURE

η

Efficiency

vs Load current

2 − 5

Output voltage

vs Output current

6 − 9

Switching frequency

vs Output current

10 − 13

Operating quiescent current

vs Input voltage

14

Output voltage ripple

15

Line transient response

Using circuit according to Figure 1

16

Load transient response

Using circuit according to Figure 1

17

Start-up timing

Using circuit according to Figure 1

18