TPS75533KTTR

The TPS755xx family of 5-A low dropout (LDO) regulators contains four fixed voltage option regulators with integrated power-good (PG（overline）) 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 μA at full load and drops down to less than 1 μA 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 μA 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（overline） (enable) shuts down the regulator, reducing the quiescent current to less than 1 μA at TJ = 25 ℃. The power-good terminal (PG（overline）) 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−220 (KC) and TO−263 (KTT) packages. The TPS755xx family includes four fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, and 3.3 V), and an adjustable regulator, the TPS75501 (adjustable from 1.22 V to 5 V). The bandgap voltage is typically 1.22 V.

Applications

• Battery-powered systems
• Electronic systems requiring voltage conversion
• Systems requiring power-on reset or low-voltage indication

Key features

• Fixed output versions available at 1.5V, 1.8V, 2.5V, 3.3V; adjustable output version with 1.22V~5V output range
• Power Good (PG) open-drain output available on fixed output versions only
• TPS75533 typical dropout voltage of 250mV at 5A output current; dropout voltage proportional to output current
• Typical quiescent current of 125μA at full load; quiescent current independent of output load; quiescent current below 1μA in shutdown
• Fast transient response for large load current variations
• Maximum output voltage tolerance of 3% over full line, load, and temperature range for fixed output versions
• Available in 5-pin TO-220 and TO-263 SMT packages
• Integrated thermal shutdown protection
• Sleep mode support: device enabled when EN pin logic low, regulator shutdown when logic high
• PG pin is active-low open-drain output requiring external pull-up resistor; enters low-impedance state when output voltage reaches ~91% of regulation value; enters high-impedance state when below ~89% of regulation value; usable for status indication
• Adjustable output version programmed via external resistor divider
• Input voltage range: -0.3V~6V
• Peak output current internally limited
• Operating junction temperature range: -40℃~150℃
• Storage temperature range: -65℃~150℃
• ESD rating: HBM 2kV, CDM 500V