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The LT1587CM-1.5 from Linear Technology Corporation (LTC) is a low dropout, 3-terminal linear voltage regulator. It provides a fixed output voltage of 1.5V and can supply up to 3A of current. The design prioritizes fast transient response and minimal input voltage, making it suitable for demanding low voltage applications.
Key features include guaranteed dropout voltage, load regulation of 0.05% typical, trimmed current limit for controlled output and short-circuit current, and on-chip thermal limiting for protection. These characteristics make it an excellent choice for powering sensitive electronics.
This regulator is available in both through-hole TO-220 and surface-mount DDPAK-3 (TO-263) packages. Its applications include powering Intel Pentium Pro processors (GTL+ supply), low voltage logic supplies, and battery-powered circuitry where efficiency and stable voltage are critical.
The device operates within a junction temperature range of 0°C to 125°C for the control section and 0°C to 150°C for the power transistor. It has a maximum input voltage rating of 7V.
The fixed output voltage is 1.5V.
The maximum output current is 3A.
The maximum input voltage is 7V.
The device is available in TO-220-3 (through hole), DDPAK-3, TO-263-4, and TO-263AA (surface mount).
For the control section it is 0°C to 125°C; for the power transistor it is 0°C to 150°C.
Yes, it has on-chip thermal limiting to protect against excessive junction temperatures.
Load regulation is typically 0.05%.