TLE 4290D Infineon Technologies, TLE 4290D Datasheet - Page 8

• Manufacturer Part Number: TLE 4290D
• Manufacturer: Infineon Technologies

Specifications of TLE 4290D

• Packages: PG-TO252-5
• Regulator Type: single output
• Output Voltage: 5V
• Accuracy: 2.0 %
• Max. Output Current: 400mA
• Dropout Voltage: 250mV

Application Information
Figure 4
Input, Output
An input capacitor is necessary for damping line influences. A resistor of approx. 1 Ω in
series with
The TLE 4290 requires an output capacitor of at least 22 μF with an ESR below 5 Ω for
stability.
Power Good
The Power Good pin informs e.g. the micro-controller in case the output voltage has
fallen below a threshold of typ. 3.65 V. When the battery voltage is supplied the Power
Good signal indicates a loss of memory due to missing power. After the Memory Good
switching threshold is reached the Power Good output remains low for the Power Good
delay time. This time can be set by the user with an external capacitor at pin D according
to the requirements of the application, e.g. the time until the microcontroller is initialized
and ready to receive any information.
Data Sheet
V
C
BAT
I 1
C
I
C
, can damp the LC of the input inductivity and the input capacitor.
Application Diagram
I 2
I
1
Reference
Band-
Gap-
GND
TLE 4290
Saturation
Current
Control
Control
Power
Good
D
and
8
4
C
47 nF
D
5
2
Q
PG
R
5 k
C
µF
22
PG
Q1
C
100
nF
Rev. 1.7, 2007-03-20
Q2
V
NMI /
PORT
µ-Controller
CC
Internal
Reset
TLE 4290
AES02822