TLE4275D V33 Infineon Technologies, TLE4275D V33 Datasheet - Page 7

• Manufacturer Part Number: TLE4275D V33
• Description: IC REG LDO 3.3V 400MA TO252-5
• Manufacturer: Infineon Technologies

Specifications of TLE4275D V33

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: 4.4 ~ 42 V
• Voltage - Dropout (typical): 0.25V @ 300mA
• Number Of Regulators: 1
• Current - Output: 400mA (Max)
• Current - Limit (min): 450mA
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: TO-252-4, DPak (4 Leads + Tab), TO-252AD
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 42 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 0.5 V at 300 mA
• Output Current: 450 mA
• Line Regulation: 15 mV
• Load Regulation: 30 mV
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000262517; TLE4275D V33; TLE4275D V33INTR

3.3
The reset function contains serveal features:
Output Undervoltage Reset:
An output undervoltage condition is indicated setting the Reset Output “RO” to low. This signal might be used to
reset a microcontroller during low supply voltage.
In case the battery voltage is already lower than the buffered output voltage
circuit is supplied from the output “Q”, ensuring a defined reset switching threshold also at
Output “RO” is held “low” down to an output voltage of
Power-On Reset Delay Time:
The power-on reset delay time
time period from exceeding the reset switching threshold
output “RO” from “low” to “high”. The power-on reset delay time
capacitor
V
For easy calculating the power-on reset delay time, a multiplier factor
Hence,
For a precise calculation consider also the delay capacitor’s tolerance.
Undervoltage Reset Delay Time:
Unlike the power-on reset delay time, the undervoltage reset delay
event where the delay capacitor
restarts. Therefore, the undervoltage reset delay time
starting from
For easy calculating the undervoltage reset delay time, a multiplier factor
becomes:
For a precise calculation consider also the delay capacitor’s tolerance.
Reset Reaction Time:
The total reset reaction rime
the external delay capacitor
becomes:
Reset Output “RO” Low for
In case of an undervoltage reset condition reset output “RO” is held “low” for
is 0 V. This is achieved by supplying the reset circuit from the output capacitor.
Datasheet
D
= 0 V.
t
t
t
d,PWR-ON
d
rr,total
t
d,PWR-ON
=
C
F
D
d
Reset Function
V
connected to pin “D” which is charged up by the delay capacitor charge current
=
/
D
C
=
=
D
t
becomes:
rr,int
F
.
V
d,PWR-ON
DST,lo
+
t
rr,d
and the external delay capacitor
.
/
V
C
C
t
Q
rr,total
D
D
t
.
C
(see typical performance graph for details). Hence, the total reset reaction rime
d,PWR-ON
1 V:
D
considers the internal reaction time
is assumed to be discharged to
allows a microcontoller and oscillator to start up. This delay time is the
V
7
t
Q
d
C
= 1 V, even if the input voltage
is defined by the delay capacitor charge current
V
D
RT
.
until the reset is released by switching the reset
Block Description and Electrical Characteristics
V
t
D
d
t
time considers a short output undervoltage
=
d,PWR-ON
t
rr,int
V
DST,lo
F
and the discharge time
d,PWR-ON
V
V
Q
F
Q
only before the charging sequence
is defined by an external delay
d
of the voltage regulator, the reset
=
1 V, even if the input voltage
t
d
=
/
C
t
d,PWR-ON
D
V
is specified. Hence,
I
Rev. 1.0, 2006-09-22
is 0 V.
V
I
TLE 4275 V33
= 0 V. The Reset
I
/
D,ch
C
D
t
rr,d
starting from
is specified.
defined by
I
D,ch
(1)
(2)
(3)
V
t
d
I