LT1963A-1.5 LDO Linear Voltage Regulator - 1.5 V / 1.5 A

Description

The LT1963A-1.5 from Linear Technology (Analog Devices) is a low-dropout (LDO) linear voltage regulator with a fixed output voltage of 1.5 V and a maximum output current of 1.5 A. The device features a low input-to-output dropout voltage of typically 340 mV at full load and fast transient response to changes in load current. Its low output noise of 40 µV RMS over a frequency range of 10 Hz to 100 kHz makes the regulator suitable for applications requiring a stable power supply, including RF equipment, analog circuits, and digital systems operating at 1.5 V.

The LT1963A-1.5 has a typical quiescent current of 1 mA, which drops below 1 µA in shutdown mode controlled via the SHDN pin. The SENSE pin allows compensation for voltage drops along PCB traces between the regulator and the load. Proper operation requires an output capacitor with a minimum capacitance of 10 µF. The regulator supports ceramic, tantalum, and aluminum electrolytic capacitors, provided their equivalent series resistance (ESR) is appropriately selected. Integrated protection features include current limiting, thermal protection, reverse battery protection, and reverse current protection.

Features

• Manufacturer: Linear Technology (Analog Devices)
• Model: LT1963A-1.5
• Type: low-dropout (LDO) linear voltage regulator
• Output voltage: 1.5 V
• Maximum output current: 1.5 A
• Minimum input voltage at 1.5 A load: 2.1 V (typical), 2.5 V (maximum)
• Dropout voltage: 340 mV (typical at 1.5 A)
• Quiescent current: 1 mA (typical)
• Shutdown current: less than 1 µA
• Output voltage noise: 40 µV RMS (10 Hz to 100 kHz)
• Ripple rejection: 63 dB (typical at 120 Hz)
• Minimum output capacitor capacitance: 10 µF
• Recommended minimum ESR for a 10 µF capacitor at 1.5 V output: 20 mΩ
• SHDN input for shutdown control
• SENSE pin for voltage drop compensation
• Operating junction temperature range: -40°C to 125°C
• Protection features: short-circuit protection, thermal protection, reverse battery protection, and reverse current protection