Texas Instruments TLV62080EVM-756 Evaluation Module TLV62080EVM-756 TLV62080EVM-756 Datenbogen
Produktcode
TLV62080EVM-756
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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 kΩ
V
OUT
SLVSAK9E – OCTOBER 2011 – REVISED FEBRUARY 2014
Table 5. List of Recommended Inductors
INDUCTANCE
CURRENT RATING
DIMENSIONS
DC RESISTANCE
TYPE
MANUFACTURER
[µH]
[mA]
L x W x H [mm
3
]
[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
9.2.2.3 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
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
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 6. List of Recommended Capacitors
CAPACITANCE
DIMENSIONS
TYPE
MANUFACTURER
[µF]
L x W x H [mm
3
]
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
9.2.2.4 Setting the Output Voltage
By selecting R
1
and R
2
, the output voltage is programmed to the desired value. Use
to calculate R
1
and R
2
.
Figure 10. Typical Application Circuit
(3)
For best accuracy, R
2
must be kept smaller than 40 k
Ω to ensure that the current flowing through R
2
is at least
100-times larger than I
FB
. Changing the sum towards a lower value increases the robustness against noise
injection. Changing the sum towards higher values reduces the quiescent current.
Copyright © 2011–2014, Texas Instruments Incorporated
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