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TLE4275
5 V Low-Drop Voltage Regulator
( Infineon
technologies
5-V Low-Drop Voltage Regulator
Preliminary Data
Features
q Output voltage 5 V i 2%
. Very low current consumption
. Power-on and undervoltage reset
. Reset low down to k, = 1 V
. Very low-drop voltage
. Short-circuit-proof
. Reverse polarity proof
. Suitable for use in automotive electronics
TLE 4275
P-T0252-5-1
Type Ordering Code Package
TLE 4275 D Q67006-A9354 P-TO252-5-1 (SMD)
TLE 4275 G Q67006-A9343 P-T0263-5-1 (SMD)
TLE 4275 Q67000-A9342 P-TO220-5-11
TLE 4275 S Q67000-A9442 P-TO220-5-12
V New type
Functional Description
The TLE 4275 is a monolithic integrated low-drop
voltage regulator in a 5pin TO-package. An input
voltage up to 45 V is regulated to k, = 5.0 V. The IC is
able to drive loads up to 450 mA and is short-circuit
proof. At over temperature the TLE 4275 is disabled by
the incorporated temperature protection. A reset signal
is generated for an output voltage k, of typ. 4.65 V.
The delay time can be programmed by the external
delay capacitor.
Data Sheet Version 1.1
P-T0263-5-1
P-T0220-5-1 1
P-T0220-5-1 2
( Intinleon TLE 4275
tec no ogles
Dimensioning Information on External Components
The input capacitor C is necessary for compensating line influences. Using a resistor of
approx. 1 Q in series with Ci, the oscillating of input inductivity and input capacitance can
be damped. The output capacitor C, is necessary for the stability of the regulation circuit.
Stability is guaranteed at values Cl, 2 22 " and an ESR of s 5 f2 within the operating
temperature range.
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
IC also incorporates a number of internal circuits for protection against:
. Overload
q Over-temperature
. Reverse polarity
Data Sheet Version 1.1 2 1999-08-04
