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TLE4299G-TLE4299GM-TLE4299-GM-TLE4299GM .
5-V Low-Drop Fixed Voltage Regulator
5-V Low-Drop Fixed Voltage Regulator TLE4299
DataSheet
FeaturesOutput voltage 5 V ��2%150mA Output currentExtreme low current consumption typical 65�A
in ON stateInhibit function: Below 1�A current consumption
in off modeEarly warningReset output low down to VQ = 1VAdjustable reset thresholdOvertemperature protectionReverse polarity proofWide temperature range New type
Functional DescriptionThe TLE4299 is a monolithic voltage regulator with fixed 5-V output, supplying loads up
to 150mA. It is especially designed for applications that may not be powered down while
the motor is off. It only needs a quiescent current of typical 65�A. In addition the
TLE4299GM includes an inhibit function. When the inhibit signal is removed, the device
is switched off and the quiescent current is less than 1�A. To achieve proper operation
of the �-controller, the device supplies a reset signal. The reset delay time is selected
application-specific by an external delay capacitor. The reset threshold is adjustable. An
early warning signal supervises the voltage at pin SI. The TLE4299 is pin-compatible to
the TLE4269 and functional similar with the additional inhibit function. The TLE4299 is
designed to supply microcontroller systems even under automotive environment
conditions. Therefore it is protected against overload, short circuit and over temperature.
Circuit DescriptionThe TLE4299 is a PNP based very low drop linear voltage regular. It regulates the
output voltage to VQ = 5V for an input voltage range of 5.5V � VI � 45V. The control
circuit protects the device against potential caused by damages overcurrent and
overtemperature.
The internal control circuit achieves a 5V output voltage with a tolerance of � 2%.
The device includes a power on reset and an under voltage reset function with adjustable
reset delay time and adjustable reset switching threshold as well as a sense control/early
warning function. The device includes an inhibit function to disable it when the ECU is
not used for example while the motor is off.
The reset logic compares the output voltage VQ to an internal threshold. If the output
voltage drops below this level, the external reset delay capacitor CD is discharged. WhenD is lower than VLD, the reset output RO is switched Low. If the output voltage drop is
very short, the VLD level is not reached and no reset-signal is asserted. This feature
avoids resets at short negative spikes at the output voltage e.g. caused by load changes.
As soon as the output voltage is more positive than the reset threshold, the delay
capacitor is charged with constant current. When the voltage reaches VUD the reset
output RO is set High again.
The reset threshold is either the internal defined VRT voltage (typical 4.6V) or can be
lowered by a voltage level at the RADJ input down to 3.5V. The reset delay time and the
reset reaction time are defined by the external capacitor CD. The reset function is active
down to VI = 1V.
In addition to the normal reset function, the device gives an early warning. When the SI
voltage drops below VSI,low, the devices asserts the SI output Low to indicate the logic
and the �-processor that this voltage has dropped. The sense function uses a hysteresis:
When the SI-voltage reaches the VSI,high level, SO is set high again. This feature can be
used as early warning function to notice the �-controller about a battery voltage drop and
a possible reset in a short time. Of cause also any other voltage can be observed by this
feature.
The user defines the threshold by the resistor-values RSI1 and RSI2.
For the exact timing and calculation of the reset and sense timing and thresholds, please
refer to the application section.
Figure1Block Diagram TLE4299 G
Figure2Block Diagram TLE4299 GM
Figure3Pin Configuration (top view)
Pin Definitions and Functions (TLE4299 G)
Figure4Pin Configuration (top view)
Pin Definitions and Functions (TLE4299 GM)
Absolute Maximum Ratingsj=–40to150�C
Input I
Inhibit Input INH
Sense Input SI
Reset Threshold RADJ
Reset Delay D
Reset Output RO
Sense Output SO
5-V Output Q
Note:Stresses above those listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
In the operating range, the functions given in the circuit description are fulfilled.
Temperature
Operating Range
Thermal DataMeasured to pin 4.
Absolute Maximum Ratings (cont’d)j=–40to150�C
CharacteristicsI=13.5V; Tj=–40 �C
Inhibit (TLE4299 GM only)Drop voltage=VI–VQ (measured when the output voltage has dropped 100mV from the nominal value
Reset Generator
Input Voltage Sense
Characteristics (cont’d)I=13.5V; Tj=–40 �CNote:The listed characteristics are ensured over the operating range of the integrated
circuit. Typical characteristics specify mean values expected over the production
spread. If not otherwise specified, typical characteristics apply at TA = 25�C and
the given supply voltage.
Figure5Measurement Circuit
