÷

ø

ö

ç

è

æ

+

´

=

÷

ø

ö

ç

è

æ

+

´

=

2

R

1

R

1

V

45

.

0

2

R

1

R

1

V

V

FB

OUT

TLV62084

1 µH

10 µF

2.7 V to 5.5 V

R

1

R

2

V

IN

POWER GOOD

SW

VOS

VIN

EN

GND

GND

PG

FB

22 µF

180 k

V

OUT

TLV62080, TLV62084

www.ti.com

SLVSAK9F – OCTOBER 2011 – REVISED JANUARY 2015

out of Equation 2. A higher inductor value is also useful to lower ripple current, but increases the transient

response time as well. The following inductors are recommended to be used in designs (see Table 5).

Table 5. List of Recommended Inductors

INDUCTANCE

CURRENT RATING

DIMENSIONS

DC RESISTANCE

TYPE

MANUFACTURER

[µH]

[mA]

[m

Ω typ]

1

2500

3 × 3 × 1.2

35

XFL3012-102ME

Coilcraft

1

1650

3 × 3 × 1.2

40

LQH3NPN1R0NJ0

Murata

2.2

2500

4 × 3.7 × 1.65

49

LQH44PN2R2MP0

Murata

2.2

1600

3 × 3 × 1.2

81

XFL3012-222ME

Coilcraft

10.2.2.3 Capacitor Selection

The input capacitor is the low impedance energy source for the converter which helps to provide stable

operation. A low ESR multilayer ceramic capacitor is recommended for best filtering and must be placed between

VIN and GND as close as possible to those terminals. For most applications 10

μF is sufficient, a larger value

reduces input current ripple.

The architecture of the TLV6208x device allows use of tiny ceramic-type output capacitors with low equivalent-

series resistance (ESR). These capacitors provide low output voltage ripple and are recommended. To keep the

resistance up to high frequencies and to get narrow capacitance variation with temperature, TI recommends use

of the X7R or X5R dielectric. The TLV62080 and TLV62084 devices are designed to operate with an output

capacitance of 10 to 100 µF, as listed in Table 4.

Table 6. List of Recommended Capacitors

CAPACITANCE

DIMENSIONS

TYPE

MANUFACTURER

[µF]

10

GRM188R60J106M

0603: 1.6 × 0.8 × 0.8

Murata

22

GRM188R60G226M

0603: 1.6 × 0.8 × 0.8

Murata

22

GRM21BR60J226M

0805: 2 × 1.2 × 1.25

Murata

10.2.2.4 Setting the Output Voltage

Figure 10. Typical Application Circuit

(3)

injection. Changing the sum towards higher values reduces the quiescent current.

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