TLE4275-Q1_15 Datasheet, PDF (1/28 Pages) Texas Instruments – TLE4275-Q1 5-V Low-Dropout Voltage Regulator

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TLE4275-Q1
SLVS647I – AUGUST 2006 – REVISED NOVEMBER 2014
TLE4275-Q1 5-V Low-Dropout Voltage Regulator
1 Features
•1 Qualified for Automotive Applications
• Output Voltage 5 V ± 2%
• Very Low Current Consumption
• Power-On and Undervoltage Reset
• Reset Low-Level Output Voltage < 1 V
• Very Low Dropout Voltage
• Short-Circuit Proof
• Reverse-Polarity Proof
2 Applications
• Qualified for Automotive Applications
• Cluster
• Body Control Modules
• Heating Ventilation and Air Conditioning (HVAC)
3 Description
The TLE4275-Q1 is a monolithic integrated low-
dropout voltage regulator offered in a 5-pin TO
package. The device regulates an input voltage up to
45 V to V_OUT = 5 V (typical). The device can drive
loads up to 450 mA and is short-circuit proof. At
overtemperature, the incorporated temperature
protection turns off the TLE4275-Q1. The device
generates a reset signal for an output voltage, V_OUT,rt,
of 4.65 V (typical). By the use of an external delay
capacitor, one can program the reset delay time.
The input capacitor, C_IN, compensates for line
fluctuation. Using a resistor of approximately 1 Ω in
series with C_IN dampens the oscillation of input
inductance and input capacitance. The output
capacitor, C_OUT, stabilizes the regulation circuit. The
specification for stability is at C_OUT ≥ 22 μF and
ESR ≤ 5 Ω, within the operating temperature range.
Stability for electrolytic capacitors specifically is at
C_OUT ≥ 68 µF within the operating temperature range.
See the application report on low-temperature
stability, SLVA501, for further details.
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 through a
buffer. Saturation control as a function of the load
current prevents any oversaturation of the power
element. The device also incorporates a number of
internal circuits for protection against: overload,
overtemperature, and reverse polarity.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DDPAK/TO-263 (5) 10.16 mm × 8.42 mm
TLE4275-Q1
TO-252 (5)
6.10 mm × 6.60 mm
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Typical Application
Vbat
C1
TLE4275
IN
OUT
C3
Vout
R1
DELAY
RESET
C2
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.