GND

FB

EN

VIN

SW

VIN = 5V

C1

R3

D1

L1

LM2830

R2

R1

C2

VO = 3.3V @ 1.0A

LM2830, LM2830-Q1

SNVS454E – AUGUST 2006 – REVISED DECEMBER 2014

www.ti.com

8.2.4 LM2830Z Design Vo = 3.3 V at 1.0-A

Figure 25 shows typical application circuit for step down solution from VIN=5 to VOUT=3.3 V, 1.0-A load current

when using device version with higher switching frequency.

Figure 25. LM2830Z (3 MHz): Vin = 5 V, Vo = 3.3 V at 1.0-A Schematic

Table 5. Bill of Materials

PART ID

PART VALUE

MANUFACTURER

PART NUMBER

U1

1.0-A Buck Regulator

TI

LM2830Z

C1, Input Cap

22 µF, 6.3 V, X5R

TDK

C3216X5ROJ226M

C2, Output Cap

22 µF, 6.3 V, X5R

TDK

C3216X5ROJ226M

D1, Catch Diode

0.3 Vf Schottky 1.5 A, 30VR

TOSHIBA

CRS08

L1

1.6 µH, 2.0 A

TDK

VLCF4018T-1R6N1R7-2

R2

10.0 k

Ω, 1%

Vishay

CRCW08051002F

R1

45.3 k

Ω, 1%

Vishay

CRCW08054532F

R3

100 k

Ω, 1%

Vishay

CRCW08051003F

20

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