TLE4267SNKSA1

TLE4267SNKSA1 Datasheet

TLE 4267

Part	Datasheet
TLE4267SNKSA1	TLE4267SNKSA1 (pdf)

Related Parts	Information
TLE4267NKSA1	TLE4267NKSA1

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1234543678094 5-V Low Drop Voltage Regulator TLE 4267 Functional Description TLE 4267 is a 5-V low drop voltage regulator for automotive applications in the PG-TO220-7 or PG-DSO-14-30 package. It supplies an output current of > 400 mA. The IC is shortcircuit-proof and has an overtemperature protection circuit. P-TO220-7-3 P-TO 220-7-180 TO-220 AB/7, Option E3180 P-TO220-7-230 P-DSO-14-3, -8, -9, -11, 14 Type TLE 4267 TLE 4267 G Data Sheet Package PG-TO220-7-11 PG-TO263-7-1 Type TLE 4267 S TLE 4267 GM Package PG-TO220-7-12 PG-DSO-14-30 TLE 4267 Application The IC regulates an input voltage VI in the range of V < VI < 40 V to a nominal output voltage of VQ = V. A reset signal is generated for an output voltage of VQ < VRT typ. V . The reset delay can be set with an external capacitor. The device has two logic inputs. A voltage of VE2 > V given to the E2-pin e.g. by ignition turns the device on. Depending on the voltage on pin E6 the IC may be hold in active-state even if VE2 goes to low level. This makes it simple 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. Design Notes for External Components The input capacitor CI is necessary for compensation of 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 at values of 22 uF and an ESR of 3 Ω within the operating temperature range. Circuit Description The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, 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 over-saturating of the power element. The reset output RO is in high-state if the voltage on the delay capacitor CD is greater or equal VUD. The delay capacitance CD is charged with the current ID for output voltages greater than the reset threshold VRT. If the output voltage gets lower than VRT a fast discharge of the delay capacitor CD sets in and as soon as VCD gets lower than VLD the reset output RO is set to low-level see Figure The reset delay can be set within wide range by dimensioning the capacitance of the external capacitor. Data Sheet TLE 4267 Table 1 Truth Table for Turn-ON/Turn-OFF Logic E6, VQ Remarks Inhibit Hold OFF Initial state, Inhibit internally pulled-up ON Regulator switched on via Inhibit, by ignition for example ON Hold clamped active to ground by controller while Inhibit is still high ON Previous state remains, even ignition is shut off self-holding state ON Ignition shut off while regulator is in self-holding state OFF Regulator shut down by releasing of Hold while Inhibit remains Low, final state. No active clamping required by external self- holding circuit uC to keep regulator in off-state. Inhibit E2 Enable function, active High Hold E6 Hold and release function, active Low Data Sheet TLE 4267 PG-TO220-7-11

PDF Datasheet Preview

1234543678094
5-V Low Drop Voltage Regulator

TLE 4267

Functional Description

TLE 4267 is a 5-V low drop voltage regulator for automotive applications in the PG-TO220-7 or PG-DSO-14-30 package. It supplies an output current of > 400 mA. The IC is shortcircuit-proof and has an overtemperature protection circuit.

P-TO220-7-3

P-TO 220-7-180 TO-220 AB/7, Option E3180

P-TO220-7-230

P-DSO-14-3, -8, -9, -11, 14

Type TLE 4267 TLE 4267 G

Data Sheet

Package PG-TO220-7-11 PG-TO263-7-1

Type TLE 4267 S TLE 4267 GM

Package PG-TO220-7-12 PG-DSO-14-30

TLE 4267

Application

The IC regulates an input voltage VI in the range of V < VI < 40 V to a nominal output voltage of VQ = V. A reset signal is generated for an output voltage of VQ < VRT typ. V . The reset delay can be set with an external capacitor. The device has two logic inputs. A voltage of VE2 > V given to the E2-pin e.g. by ignition turns the device on. Depending on the voltage on pin E6 the IC may be hold in active-state even if VE2 goes to low level. This makes it simple 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.

Design Notes for External Components

The input capacitor CI is necessary for compensation of 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 at values of 22 uF and an ESR of 3 Ω within the operating temperature range.

Circuit Description

The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, 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 over-saturating of the power element. The reset output RO is in high-state if the voltage on the delay capacitor CD is greater or equal VUD. The delay capacitance CD is charged with the current ID for output voltages greater than the reset threshold VRT. If the output voltage gets lower than VRT a fast discharge of the delay capacitor CD sets in and as soon as VCD gets lower than VLD the reset output RO is set to low-level see Figure The reset delay can be set within wide range by dimensioning the capacitance of the external capacitor.

Data Sheet

TLE 4267

Table 1

Truth Table for Turn-ON/Turn-OFF Logic

E6, VQ Remarks

Inhibit Hold

OFF Initial state, Inhibit internally pulled-up

ON Regulator switched on via Inhibit, by ignition for example

ON Hold clamped active to ground by controller while Inhibit is still
high

ON Previous state remains, even ignition is shut off self-holding
state

ON Ignition shut off while regulator is in self-holding state

OFF Regulator shut down by releasing of Hold while Inhibit remains

Low, final state. No active clamping required by external self-
holding circuit uC to keep regulator in off-state.

Inhibit E2 Enable function, active High Hold E6 Hold and release function, active Low

Data Sheet

TLE 4267

PG-TO220-7-11

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Datasheet ID: TLE4267SNKSA1 638738