Datasheet

p´ ´ ´
ff
1
1
C =
2 R 25 kHz
f
p´ ´ ´
z
1 ff
1
= = 25 kHz
2 R C
V
OUT
+ V
REF
ǒ
1 )
R
1
R
2
Ǔ
TLV62065
V = 1.8 V
up to 2 A
OUT
R
360 k
1
Ω
R
180 k
2
Ω
V = 2.9 V to 5.5 V
IN
C
10
OUT
µF
C
10
IN
µF
PVIN
AVIN
EN
MODE
AGND
PGND
SW
FB
C
22 pF
ff
L
1.0 Hm
TLV62065
SLVSAC4A –NOVEMBER 2010–REVISED JULY 2012 www.ti.com
APPLICATION INFORMATION
Figure 23. TLV62065 1.8V Adjustable Output Voltage Configuration
OUTPUT VOLTAGE SETTING
The output voltage can be calculated to:
with an internal reference voltage V
REF
typically 0.6V.
To minimize the current through the feedback divider network, R
2
should be within the range of 120 kΩ to 360
kΩ. The sum of R
1
and R
2
should not exceed ~1MΩ, to keep the network robust against noise. An external feed-
forward capacitor C
ff
is required for optimum regulation performance. Lower resistor values can be used. R
1
and
C
ff
places a zero in the loop. The right value for C
ff
can be calculated as:
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