LM3673 datasheet(17/28 Pages) TI

17 / 28 page

PP-RMS

PP-C

2 + V

PP-ESR

LM3673

www.ti.com

SNVS434L – JULY 2006 – REVISED OCTOBER 2015

The peak-to-peak ripple voltage, rms value can be expressed as follow:

(10)

The output voltage ripple is dependent on the inductor current ripple and the equivalent series resistance of the

output capacitor (RESR).

The RESR is frequency dependent (as well as temperature dependent); make sure the value used for calculations

is at the switching frequency of the device.

Table 4. Suggested Capacitors and Their Suppliers

MODEL

TYPE

VENDOR

VOLTAGE RATING

CASE SIZE inch (mm)

4.7 µF for CIN

C2012X5R0J475K

Ceramic, X5R

TDK

6.3 V

0805 (2012)

JMK212BJ475K

Ceramic, X5R

Taiyo-Yuden

6.3 V

0805 (2012)

GRM21BR60J475K

Ceramic, X5R

Murata

6.3 V

0805 (2012)

C1608X5R0J475K

Ceramic, X5R

TDK

6.3 V

0603 (1608)

10 µF for COUT

GRM21BR60J106K

Ceramic, X5R

Murata

6.3 V

0805 (2012)

JMK212BJ106K

Ceramic, X5R

Taiyo-Yuden

6.3 V

0805 (2012)

C2012X5R0J106K

Ceramic, X5R

TDK

6.3 V

0805 (2012)

C1608X5R0J106K

Ceramic, X5R

TDK

6.3 V

0603 (1608)

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