DUAL CHANNEL1.5 MHZ, 600MA SYNCHRONOUS STEP-DOWN CONVERTER

2007-7-11

8/10

FSP3112

Part #

L (µH)

Max DCR (mΩ)

Rated D.C. Current (A)

Size W×L×H (mm)

Sumida

CR43

14

2.2

3.3

4.7

56.2

71.2

86.2

108.7

2.52

1.75

1.44

1.15

4.5×4.0×3.5

Sumida

CDRH4D18

1.5

2.2

3.3

4.7

75

110

162

1.32

1.04

0.84

4.7×4.7×2.0

Toko

D312C

1.5

2.2

3.3

4.7

120

140

180

240

1.29

1.14

0.98

0.79

3.6×3.6×1.2

INPUT CAPACITOR SELECTION

The input capacitor reduces the surge current drawn from the input and switching noise from the device. The input

capacitor impedance at the switching frequency shall be less than input source impedance to prevent high

frequency switching current passing to the input. A low ESR input capacitor sized for minimum RMS current must be

used. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR and small

temperature coefficients. A 4.7µF ceramic capacitor for most applications is sufficient.

OUTPUT CAPACITOR SELECTION

The output capacitor is requires to keep the output voltage ripple small and to ensure regulation loop stability. The

output capacitor must have low impedance at the switching frequency. Ceramic capacitors with X5R or X7R

()

OUT

IN

OUT

OUT

IN

OSC

OSC

VV

V

1

VESR

Vf

L

8 f

C3

×−

⎛⎞

∆≤

×

+

⎜⎟

××

××

⎝⎠

ORDERING INFORMATION

MARKING INFORMATION

(1) MSOP10

(2) DFN10

FSP3112XXXX

Package:

MS: MSOP10

L: DFN10

Output Voltage:

Blank: ADJ

Packing:

A: Tape & Reel

Temperature Grade: