INFINEON TLE4263-2ES User Manual
Data Sheet, Rev. 1.0, April 2008
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TLE4263-2ES
5-V Low Dropout Voltage Regulator
Automotive Power
5-V Low Dropout Voltage Regulator
1Overview
Features
• Exposed Pad Package with Excellent Thermal Behaviour
• Output Voltage Tolerance ≤ ±2%
• Output Current up to 180 mA
• Very Low Standby Current Consumption
• Watchdog for Monitoring a Microprocessor
• Power-on and Undervoltage Reset with Programmable Delay Time
• Reset Low down to
• Adjustable Reset Threshold
• Very Low Dropout Voltage
• Output Current Limitation
• Reverse Polarity Protection
• Overtemperature Protection
• Wide Temperature Range from -40 °C up to 150 °C
• Input Voltage Range from -42 V to 45 V
• Suitable for Use in Automotive Electronics
• Green Product (RoHS compliant)
• AEC Qualified
V
= 1 V
Q
TLE4263-2ES
PG-DSO-8 exposed pad
Description
TLE4263-2ES is a monolithic integrated very low dropout voltage regulator in a SMD package PG-DSO-8 exposed
pad, especially designed for automotive applications. An input voltage up to 45 V is regulated to an output voltage
of 5.0 V. The component is able to drive loads up to 180 mA. The IC is short-circuit proof by the implemented
current limitation and has an integrated overtemperature shutdown.
It additionally provides features like power-on and undervoltage reset with adjustable reset threshold, a watchdog
circuit for monitoring a connected microcontroller and an inhibit input for enabling or disabling the component.
The reset output RO is set to “low” in case the output voltage falls below the reset switching threshold
threshold can be decreased down to 3.5 V by an external resistor divider. The power-on reset delay time can be
programmed by the external delay capacitor
The watchdog circuit provides a monitoring function for microcontrollers: At missing pulses on the watchdog’s
input W the reset output RO is set to “low”. The trigger time for the watchdog pulses can be set by the external
capacitor
The IC can be switched off by the inhibit input, reducing the current consumption to typically 0 µA.
Type Package Marking
TLE4263-2ES PG-DSO-8 exposed pad 4263-2
Data Sheet 2 Rev. 1.0, 2008-04-21
C
.
D
C
.
D
V
. This
Q,rt
TLE4263-2ES
Dimensioning Information on External Components
The input capacitor
for the stability of the control loop. Stability is guaranteed at values ≥ 22 µF and an ESR of ≤ 3 Ω within the
operating temperature range. For small tolerances of the reset delay the capacitance’s spread of the delay
capacitor
Circuit Description
The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and drives
the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any
oversaturation of the power element. The component also has a number of internal circuits for protection against:
• Overload
• Overtemperature
• Reverse polarity
In case the externally scaled down output voltage at the reset adjust input falls below 1.35 V, the external reset
delay capacitor
threshold
the reset threshold input is connected to GND, reset is triggered at an output voltage of typically 4.65 V.
C
and its temperature coefficient should be taken into consideration.
D
V
DRL
C
is recommended for compensation of line influences. The output capacitor CQ is necessary
I
C
is discharged by the reset generator. When the voltage of the capacitor reaches the lower
D
, a reset signal occurs at the reset output and is held until the upper threshold VDU is exceeded. If
Overview
Data Sheet 3 Rev. 1.0, 2008-04-21
TLE4263-2ES
2 Block Diagram
Temperature
Sensor
Ι Q
Input
Bandgap
Reference
Control
Amplifier
Saturation
Control and
Protection
Circuit
Buffer
W
Watchdog
Reset
Generator
Block Diagram
Output
Reset
D
Delay
RO
Reset
Output
RADJ
Reset
Threshold
Figure 1 Block Diagram
INH
Inhibit
GND
GND
AEB03068
Data Sheet 4 Rev. 1.0, 2008-04-21
TLE4263-2ES
3 Pin Configuration
3.1 Pin Assignment
,
,1+
52
*1'
Figure 2 Pin Configuration
3.2 Pin Definitions and Functions
Pin Configuration
4
:
5$'-
'
Pin Symbol Function
1I Input
for compensating line influences, a capacitor to GND close to the IC terminals is
recommended
2INH Inhibit
enables/disables the device;
connect to I if the this function is not needed
3RO Reset Output
open-collector output connected to the output via an internal 30kΩ pull-up resistor;
leave open if the this function is not needed
4GND Ground
5D Reset Delay Timing
connect a ceramic capacitor to GND for adjusting the reset delay time / watchdog
trigger time;
leave open if this function is not needed
6RADJ Reset Threshold Adjust
connect an external voltage divider to adjust the reset switching threshold;
connect to GND for using internal threshold
7W Watchdog
rising edge triggered input for monitoring a microcontroller;
connect to GND if this function is not needed
8Q Output
block to ground with a capacitor close to the IC terminals with a capacitance value
C ≥ 22 µF, and an ESR ≤ 3 Ω
PAD – Exposed Pad
attach the exposed pad on package bottom to the heatsink area on circuit board;
connect to GND
Data Sheet 5 Rev. 1.0, 2008-04-21
TLE4263-2ES
General Product Characteristics
4 General Product Characteristics
4.1 Absolute Maximum Ratings
Absolute Maximum Ratings
T
= -40 °C to +150 °C; all voltages with respect to ground, positive current flowing into pin
j
(unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Conditions
Input I, Input INH
4.1.1 Input Voltage
Reset Output RO, Reset Delay D
4.1.2 Voltage
Reset Threshold RADJ
4.1.3 Voltage
Output Q
4.1.4 Voltage
Watchdog W
4.1.5 Voltage
Temperature
4.1.6 Junction Temperature
4.1.7 Storage Temperature
ESD Susceptibility
4.1.8 Human Body Model (HBM)
4.1.9 Charged Device Model (CDM)
1) not subject to production test, specified by design
2) ESD HBM Test according JEDEC JESD22-A114
3) ESD CDM Test according AEC/ESDA ESD-STM5.3.1-1999
1)
Min. Max.
V
, V
I
INH
V
, V
R
V
RADJ
V
Q
V
W
T
j
T
stg
2)
3)
Voltage - 2 kV –
Voltage - 1 kV –
-42 45 V –
-0.3 42 V –
D
-0.3 6 V –
-0.3 7 V –
-0.3 6 V –
–150°C–
-50 150 °C–
Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in the
data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are
not designed for continuous repetitive operation.
Data Sheet 6 Rev. 1.0, 2008-04-21
TLE4263-2ES
General Product Characteristics
4.2 Functional Range
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Max.
4.2.1 Input Voltage
4.2.2 Junction Temperature
V
I
T
j
5.5 45 V –
-40 150 °C–
Note: Within the functional range the IC operates as described in the circuit description. The electrical
characteristics are specified within the conditions given in the related electrical characteristics table.
4.3 Thermal Resistance
Pos. Parameter Symbol Limit Values Unit Conditions
Min. Typ. Max.
4.3.1 Junction to Case
4.3.2 Junction to Ambient
4.3.3 R
4.3.4 R
4.3.5 R
1) Not subject to production test, specified by design.
2) Specified R
(Chip+Package) was simulated on a 76.2 x 114.3 x 1.5 mm³ board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu).
Where applicable a thermal via array under the exposed pad contacted the first inner copper layer.
3) Specified R
(Chip+Package) was simulated on a 76.2 × 114.3 × 1.5 mm
value is according to Jedec JESD51-2,-5,-7 at natural convection on FR4 2s2p board; The Product
thJA
value is according to Jedec JESD 51-3 at natural convection on FR4 1s0p board; The Product
thJA
1)
R
thJC
– 10 – K/W measured to
exposed pad
1)
R
thJA
thJA
thJA
thJA
–45–K/W
– 153 – K/W footprint only
– 64 – K/W 300 mm² heatsink
– 55 – K/W 600 mm² heatsink
3
board with 1 copper layer (1 x 70µm Cu).
2)
area
area
3)
3)
3)
Data Sheet 7 Rev. 1.0, 2008-04-21
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