TLE4287GXUMA1

TLE4287GXUMA1 Datasheet

TLE4287G

Part	Datasheet
TLE4287GXUMA1	TLE4287GXUMA1 (pdf)

Related Parts	Information
TLE4287GNT	TLE4287GNT

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TLE4287G 5-V Voltage Regulator Data Sheet Automotive Power 5-V Voltage Regulator TLE4287G Functional Description The TLE4287G is a monolithic integrated 5 V voltage regulator in PG-DSO-14 package. It supplies an output current IQ > 250 mA. The IC is short circuit proof and incorporates temperature protection which turns off the device at overtemperature. The input voltage VI is regulated in the range of V < VI < 40 V to VQ,nom = 5 V. Therefore a reference voltage, which is kept highly accurate by resistance adjustment, is compared via a control amplifier to a voltage that is proportional to the output voltage. The control amplifier drives the base of the series transistor by a buffer. A comparator in the reset-generator block compares a reference voltage that is independent of the input voltage to the scaled-down output voltage. In the case of an output voltage VQ < V the reset delay capacitor is discharged and a reset signal is generated by setting the reset output LOW. The reset delay time can be set by choosing the external capacitor over a wide range. When the output voltage rises above VQ V the reset delay capacitor is charged again. As soon as the delay capacitor voltage reaches the upper switching threshold the reset output pin is set HIGH again. Type TLE4287G Data Sheet Package PG-DSO-14 TLE4287G The device has two logic inputs, EN and H. It is turned ON by a voltage > 4 V at EN, for example by the ignition and remains active in case H is set LOW, even if the voltage at EN goes LOW. This makes it possible to implement a self-holding circuit without external components. When the device is turned OFF, the output voltage drops to 0 V and current consumption tends towards 0 uA see Table Design Notes for External Components The input capacitor CI is necessary for compensation line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 Ω in series with CI. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed for CQ 100 nF within the operating temperature range. Table 1 Enable EN L H State Table for Turn-On/Turn-Off Logic Hold H X Remarks 0 V Initial state 5 V Regulator switched on via pin 6, by ignition for example 5 V Pin 9 clamped active to GND by controller while pin 6 is still HIGH 5 V Previous state remains, even ignition is shut off: self-holding state 5 V Ignition shut off while regulator is in self-holding state 0 V Regulator shut down by releasing of pin 9 while pin 6 remains LOW, final state. No active clamping required by external self-holding circuit uC to keep regulator shut off Data Sheet TLE4287G I N.C. GND EN RO 14 GND 12 GND 11 GND

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TLE4287G
5-V Voltage Regulator

Data Sheet

Automotive Power
5-V Voltage Regulator

TLE4287G

Functional Description

The TLE4287G is a monolithic integrated 5 V voltage regulator in PG-DSO-14 package. It supplies an output current IQ > 250 mA. The IC is short circuit proof and incorporates temperature protection which turns off the device at overtemperature.

The input voltage VI is regulated in the range of V < VI < 40 V to VQ,nom = 5 V. Therefore a reference voltage, which is kept highly accurate by resistance adjustment, is compared via a control amplifier to a voltage that is proportional to the output voltage. The control amplifier drives the base of the series transistor by a buffer.

A comparator in the reset-generator block compares a reference voltage that is independent of the input voltage to the scaled-down output voltage. In the case of an output voltage VQ < V the reset delay capacitor is discharged and a reset signal is generated by setting the reset output LOW. The reset delay time can be set by choosing the external capacitor over a wide range. When the output voltage rises above VQ V the reset delay capacitor is charged again. As soon as the delay capacitor voltage reaches the upper switching threshold the reset output pin is set HIGH again.

Type TLE4287G

Data Sheet

Package PG-DSO-14

TLE4287G

The device has two logic inputs, EN and H. It is turned ON by a voltage > 4 V at EN, for example by the ignition and remains active in case H is set LOW, even if the voltage at EN goes LOW. This makes it possible to implement a self-holding circuit without external components. When the device is turned OFF, the output voltage drops to 0 V and current consumption tends towards 0 uA see Table

Design Notes for External Components

The input capacitor CI is necessary for compensation line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 Ω in series with CI. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed for CQ 100 nF within the operating temperature range.

Table 1 Enable EN L H

State Table for Turn-On/Turn-Off Logic

Hold H X

Remarks
0 V Initial state
5 V Regulator switched on via pin 6, by ignition for
example
5 V Pin 9 clamped active to GND by controller while
pin 6 is still HIGH
5 V Previous state remains, even ignition is shut off:
self-holding state
5 V Ignition shut off while regulator is in self-holding
state
0 V Regulator shut down by releasing of pin 9 while pin
6 remains LOW, final state. No active clamping
required by external self-holding circuit uC to
keep regulator shut off

Data Sheet

TLE4287G

I N.C. GND

EN RO
14 GND
12 GND
11 GND

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Datasheet ID: TLE4287GXUMA1 638749