CB2012T2R2M datasheet(13/16 Pages) LINER

13 / 16 page

LTC3410

3410fb

APPLICATIO S I FOR ATIO

Figure 6a

Figure 6b

Figure 6c

ILOAD (mA)

0.1

100

1000

3410 F06b

VIN = 3.6V

VIN = 4.2V

VOUT

100mV/DIV

AC COUPLED

200mA/DIV

ILOAD

200mA/DIV

µs/DIV

3410 F06c

VIN = 3.6V

VOUT = 3V

ILOAD = 100mA TO 300mA

Substituting VOUT = 3V, VIN = 4.2V, ∆IL = 100mA

and f = 2.25MHz in Equation (3) gives:

MHz

−

⎛

⎝⎜

⎞

⎠⎟

2 25

100

)

A 4.7

µH inductor works well for this application. For best

efficiency choose a 350mA or greater inductor with less

than 0.3

Ω series resistance.

CIN will require an RMS current rating of at least 0.125A ≅

ILOAD(MAX)/2 at temperature and COUT will require an ESR

of less than 0.5

Ω. In most cases, a ceramic capacitor will

satisfy this requirement. From Table 2, Capacitance Selec-

tion, COUT = 10µF and CIN = 4.7µF.

For the feedback resistors, choose R1 = 301k. R2 can

then be calculated from equation (2) to be:

k use

OUT

1 1 827 8

825

−

⎛

⎝⎜

⎞

⎠⎟

Figure 6 shows the complete circuit along with its

efficiency curve.

VIN

CIN

††

4.7

µF

CER

VIN

2.7V

TO 4.2V

LTC3410

RUN

4.7

µH*

10pF

825k

301k

3410 F06a

2, 5

VFB

GND

COUT

†

µF

CER

VOUT

†TAIYO YUDEN JMK212BJ106

††TAIYO YUDEN JMK212BJ475

*MURATA LQH32CN4R7M23

CB2012T2R2M Datasheet(PDF) 13 Page - Linear Technology

CB2012T2R2M Datasheet(HTML) 13 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Datasheet Download

Link URL