TPS64200,TPS64201

TPS64202,TPS64203

SLVS485 − AUGUST 2003

www.ti.com

16

APPLICATION INFORMATION

SW

CDRH6D28-5R0

Si5475DC

MBRM120LT3

EN

GND

FB

VIN

ISENSE

Li-lon

3.3 V to 4.2 V

CIN

10

µF

TPS64202

R(ISENSE) = 33 mΩ

R1

620 k

Ω

R2

360 k

Ω

Cff

4.7 pF

Co

47

mF PosCap

6TPA47M

3.3 V / 2 A

1

2

3

6

5

4

5

µH

Figure 19. Application For a Li-Ion to 3.3-V / 2-A Conversion

The TPS64202 was used for this application because for a low input to output voltage difference, the switching

frequency is determined by the minimum off-time. The TPS64202 with its minimum off-time of 300 ns provides

a higher switching frequency compared to the other members of the TPS6420x family.

SW

CDRH6D28-5R0

Si5475DC

MBRM120LT3

EN

GND

FB

VIN

ISENSE

Li-lon

3.3 V to 4.2 V

CIN

10

µF

TPS64202

R1

620 k

Ω

R2

360 k

Ω

Cff

4.7 pF

Co

47

mF PosCap

6TPA47M

3.3 V / 2 A

R3

150

Ω

C3

470 pF

1

2

3

6

5

4

5

µH

Network For the Schottky Diode