TLE4284DV Infineon Technologies, TLE4284DV Datasheet - Page 21

• Manufacturer Part Number: TLE4284DV
• Description: IC REG LDO ADJ VOLT TO-252
• Manufacturer: Infineon Technologies

Specifications of TLE4284DV

• Regulator Topology: Positive Adjustable
• Voltage - Output: Adjustable
• Voltage - Input: Up to 40V
• Voltage - Dropout (typical): 1.3V @ 1A
• Number Of Regulators: 1
• Current - Output: 1A (Max)
• Current - Limit (min): 1A
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: TO-252-2, DPak (2 Leads + Tab), TO-252AA, SC-63
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000014339; TLE4284DV; TLE4284DVNT; TLE4284DVT; TLE4284DVT; TLE4284DVTR

Application Hints
Adjustable Version
At the fixed voltage TLE 4284 devices, the output voltage is divided internally and
compared to an internal reference of 1.25 V typical. The regulation loop controls the
output voltage to achieve the output voltage of 5 V, 3.3 V, 2.6 V, 1.8V or 1.5V. The
variable version compares the voltage difference between the adjust pin ADJ and the
output pin Q to the internal reference of typically 1.25 V. The output voltage is adjusted
by an external voltage divider between Q, ADJ and GND and calculates:
For the variable regulator TLE 4284 DV, a minimum load current of 5 mA is necessary
in order to keep the output voltage regulated. If the application does not assure this
minimum load requirement, the output voltage divider should be dimensioned sufficiently
low-ohmic: R
For the variable voltage type an additional decoupling a capacitor
improves the ripple rejection ratios. Placing
capacitance of C
Output
The output current limitation is reduced as a function of the input voltage for high input
voltages above 25 V.
The TLE 4284 requires a 10 µF output capacitor with 0.1
of the regulation loop.
At the input of the regulator a capacitor is necessary for compensation of line influences.
A serial diode should be used to eliminate negative voltages from the input. As a
minimum, a 100 nF ceramic input capacitor should be used. If the regulator is used in an
environment with long input lines, an input capacitance of 10 µF is recommended.
Data Sheet
1
240
Q
V
µF.
Q
=
V
REF


1
21
+
R
---- -
R
2
1


C
+
ADJ
I
ADJ
requires an increased output
ESR
R
2
C
ADJ
Rev. 2.1, 2007-03-20
at the adjust pin
for the stability
TLE 4284