TLE4275-Q1

Part: TLE4275-Q1 — Texas Instruments

Type: Low-Dropout Linear Voltage Regulator (5-V fixed, automotive-qualified)

Description: 5 V ±2% low-dropout regulator with up to 45 V input, 450 mA output drive, power-on/undervoltage reset with programmable delay, and short-circuit and reverse-polarity protection.

Operating Conditions:

• Input voltage: 5.5–42 V (recommended operating conditions)
• Junction temperature: -40 to 150 °C
• Output capacitor: COUT ≥ 22 μF with ESR ≤ 5 Ω for stability

Absolute Maximum Ratings:

• Max input voltage (IN): 45 V (min -42 V)
• Output voltage range (OUT): -1 to 16 V
• RESET pin voltage: -0.3 to 25 V
• DELAY pin voltage: -0.3 to 7 V
• Max operating junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Output voltage: 4.9 / 5 / 5.1 V (min/typ/max), IO = 5–400 mA, VI = 6–28 V
• Output voltage: 4.9 / 5 / 5.1 V, IO = 5–200 mA, VI = 6–40 V
• Output current limit: 450 / 700 / 950 mA
• Quiescent current (IO = 1 mA, TJ = 25 °C): 150 μA typ, 200 μA max
• Dropout voltage (IO = 300 mA): 250 mV typ, 500 mV max
• Load regulation (IO = 5–400 mA): 15 mV typ, 30 mV max
• Line regulation (ΔVI = 8–32 V, IO = 5 mA): ±15 mV max
• PSRR: 60 dB typ (100 Hz, 0.5 Vpp)
• RESET threshold: 4.5 / 4.65 / 4.8 V
• RESET delay time (CD = 47 nF): 10 / 16 / 22 ms

Features:

• 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
• Overtemperature protection
• Low-voltage tracking for cold-crank conditions

Applications:

• Cluster
• Body control modules
• Heating, ventilation, and air conditioning (HVAC)

Package:

• DDPAK/TO-263 (5 pins, KTT) — 10.16 mm × 8.42 mm
• TO-252 (5 pins, KVU) — 6.10 mm × 6.60 mm
• HTSSOP (20 pins, PWP) — 6.50 mm × 4.40 mm

• 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

• Qualified for Automotive Applications
• Cluster
• Body Control Modules
• Heating Ventilation and Air Conditioning (HVAC)

over recommended operating free-air temperature range, VI = 13.5 V, TJ = -40°C to 150°C (unless otherwise noted) (see Figure 18)

over operating free-air temperature range (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted)

1

The input capacitor, CIN, compensates for line fluctuation. Using a resistor of approximately 1 Ω in series with CIN dampens the oscillation of input inductance and input capacitance. The output capacitor, COUT, stabilizes the regulation circuit. The specification for stability is at COUT ≥ 22 μ F and ESR ≤ 5 Ω , within the operating temperature range. Stability for electrolytic capacitors specifically is at COUT ≥ 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 .