TPS755数据手册集成电路（IC）的线性+开关稳压器规格书PDF

描述 Description

The TPS755xx family of 5-A low dropout (LDO) regulators contains four fixed voltage option regulators with integrated power-good (PG\\) and an adjustable voltage option regulator. These devices are capable of supplying 5 A of output current with a dropout of 250 mV (TPS75533). Therefore, the device is capable of performing a 3.3-V to 2.5-V conversion. Quiescent current is 125 uA at full load and drops down to less than 1 uA when the device is disabled. The TPS755xx is designed to have fast transient response for large load current changes. Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 250 mV at an output current of 5 A for the TPS75533) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 125 uA over the full range of output current). These two key specifications yield a significant improvement in operating life for battery-powered systems. The device is enabled when EN\\ is connected to a low-level voltage. This LDO family also features a sleep mode; applying a TTL high signal to EN\\ (enable) shuts down the regulator, reducing the quiescent current to less than 1 uA at TJ = 25°C. The power-good terminal (PG\\) is an active low, open drain output, which can be used to implement a power-on reset or a low-battery indicator. The TPS755xx is offered in 1.5-V, 1.8-V, 2.5-V, and 3.3-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.22 V to 5 V). Output voltage tolerance is specified as a maximum of 3% over line, load, and temperature ranges. The TPS755xx family is available in a 5-pin TO\\x96220 (KC) and TO\\x96263 (KTT) packages.

特性 Features

• 5-A Low-Dropout Voltage Regulator
• Available in 1.5-V, 1.8-V, 2.5-V, and 3.3-V Fixed-Output and Adjustable Versions
• Open Drain Power-Good (PG\\) Status Output (Fixed Options Only)
• Dropout Voltage Typically 250 mV at 5 A (TPS75533)
• Low 125 uA Typical Quiescent Current
• Fast Transient Response
• 3% Tolerance Over Specified Conditions for Fixed-Output Versions
• Available in 5-Pin TO\\x96220 and TO\\x96263 Surface-Mount Packages
• Thermal Shutdown Protection