TLE 4253GS Infineon Technologies, TLE 4253GS Datasheet - Page 17

• Manufacturer Part Number: TLE 4253GS
• Manufacturer: Infineon Technologies

Specifications of TLE 4253GS

• Packages: PG-DSO-8
• Regulator Type: tracker
• Output Voltage: adj.
• Accuracy: 0.5 %
• Max. Output Current: 250mA
• Dropout Voltage: 280mV

Figure 4
In order to obtain a lower output voltage
according to Figure 4 has to be used. The output voltage
With a given reference voltage
for
Taking into consideration also the effect of the internal EN/ADJ pull-down resistor, the external resistor divider’s
R2
Data Sheet
ADJ
R2
ADJ
has to be selected to:
is given by:
Application circuit: Output voltage
VBAT
V
REF
I
Main µC supply, e.g.
, the desired output voltage
R2
TLE4271-2
TLE4278
TLE4470
V
ADJ select
Q
etc.
V
R2
GND
at the tracker output than the reference voltage
Q
,
R1
R2
ADJ
=
ADJ
ADJ
V
=
REF
=
Q
V
R1


Q
VREF
--------------------------------------------------------- -
R
⋅
R2
ADJ
lower than reference voltage


PullDown min
17
--------------------------------------- -
R1
ADJ
V
⋅
5
8
ADJ


Q
R2
---------------------------
V
⋅
EN/
ADJ
I
R
then calculates:
REF
+
ADJ
,
PullDown min
TLE 4253 G
V
2, 3, 6, 7
V
R2
Q
Q
–
–
ADJ
V
and the resistor value
GND
R2
Q




,
ADJ


FB
Q
VDD
1
4
I/O
µC, e.g. C167
V
Application Information
REF
R1
V
Rev. 1.2, 2009-11-09
ADJ
REF
VQ < VREF
, the resistor value
, a voltage divider
TLE4253