GENERAL DESCRIPTION
The TDA3665 is a fixed 8.5 V voltage regulator with a very low dropout voltage and quiescent current, which operates over a wide supply voltage range.

FEATURES
• Fixed 8.5 V, 100 mA regulator
• Supply voltage range up to 33 V (45 V)
• Very low quiescent current of 15 µA (typical value)
• Very low dropout voltage
• High ripple rejection
• Very high stability:
    – Electrolytic capacitors: Equivalent Series Resistance (ESR) < 30 Ω at IREG ≤ 25 mA (see Fig.6)
    – Other capacitors: 100 nF at 200 µA ≤ IREG ≤ 100 mA.
• Pin compatible family TDA3662 to TDA3666
• Protections:
    – Reverse polarity safe (down to −25 V without high reverse current)
    – Negative transient of 50 V (RS = 10 Ω and t < 100 ms)
    – Able to withstand voltages up to 18 V at the output (supply line may be short-circuited)
    – ESD protection on all pins
    – DC short-circuit safe to ground and VP of the regulator output
    – Temperature protection (at Tj > 150 °C).