Features

• Output Current: 1.5A
• Dropout Voltage: 310mV
• Precision Current Limit with Foldback
• Low Output Noise: 60μV_RMS (10Hz to 100kHz)
• Low Quiescent Current: 1.1mA
• Precision Positive or Negative Shutdown Logic
• Fast Transient Response
• Wide Input Voltage Range: –1.8V to –30V
• Adjustable Output Voltage Range: –1.22V to –29.3V
• Fixed Output Voltages: –2.5V, –3V, –3.3V, –5V, –12V, –15V
• Controlled Quiescent Current in Dropout
• < 1μA Quiescent Current in Shutdown
• Stable with 10μF Output Capacitor
• Stable with Ceramic, Tantalum or Aluminum Capacitors
• Thermal Limit with Hysteresis
• Reverse Output Protection
• 5-Lead TO-220 and DD-Pak, Thermally Enhanced 12-Lead MSOP and 8-Lead 3mm × 3mm × 0.75mm DFN Packages

Typical Application

Description

The LT®3015 series are low noise, low dropout, negative linear regulators with fast transient response. The devices supply up to 1.5A of output current at a typical dropout voltage of 310mV. Operating quiescent current is typically 1.1mA and drops to < 1μA in shutdown. Quiescent current is also well controlled in dropout. In addition to fast transient response, the LT3015 series exhibit very low output noise, making them ideal for noise sensitive applications.

The LT3015 regulators are stable with a minimum 10μF output capacitor. Moreover, the regulator can use small ceramic capacitors without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse output protection, precision current limit with foldback and thermal limit with hysteresis.

The LT3015 regulators are available in fixed output voltages of –2.5V, –3V, –3.3V, –5V, –12V and –15V and as an adjustable device with a –1.22V reference voltage. Packages include the 5-lead TO-220 and DD-Pak, a thermally enhanced 12-lead MSOP and the low profile (0.75 mm) 8-lead 3mm × 3mm DFN.