TPS77801DR

Because the PMoS device behaves as a low-value resistor, the dropout voltage is very low (typically 260 mV at an output current of 750 mA for the TPS77x33) 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 85 μA over the full range of output current, 0 mA to 750 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. 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 1 μA at TJ = 25 ℃ The RESET output of the TPS777xx initiates a reset in microcomputer and microprocessor systems in the event of an undervoltage condition. An internal comparator in the TPS777xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. Power good (PG) of the TPS778xx is an active high output, which can be used to implement a power-on reset or a low-battery indicator. The TPS777xx and TPS778xx are 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 1.5 V to 5.5 V for the TPS77701 option and 1.2 V to 5.5 V for the TPS77801 option). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS777xx and TPS778xx families are available in 8-pin SOIC and 20-pin PWP packages.

Applications

• Battery-powered systems
• Microcomputer and microprocessor systems
• Power undervoltage detection and reset circuits
• Power status monitoring and low battery indication applications

Key features

• Rated output current 750mA
• Available in fixed output versions of 1.5V, 1.8V, 2.5V, 3.3V and adjustable versions; TPS77701 adjustable version output range 1.5V~5.5V, TPS77801 adjustable version output range 1.2V~5.5V
• TPS77x33 typical dropout voltage 260mV at 750mA output current; dropout voltage proportional to output current
• Typical quiescent current as low as 85μA; quiescent current independent of output load; quiescent current drops to 1μA after regulator shutdown at 25℃ junction temperature
• Fixed output versions: maximum output voltage tolerance 2% over full line, full load, and full temperature range
• TPS777xx features open-drain power-on reset with 200ms delay; integrated comparator monitors output voltage to trigger system reset under undervoltage conditions
• TPS778xx features open-drain active-high power-good output for power-on reset or low battery indication
• Integrated thermal shutdown protection; peak output current internally limited
• Sleep mode support; pull EN pin high to disable regulator
• Adjustable versions: output voltage set via external resistor divider network
• Available in 8-pin SOIC and 20-pin TSSOP PowerPAD (PWP) packages
• Operating junction temperature range -40℃~125℃; storage temperature range -65℃~150℃
• Maximum input voltage range -0.3V~13.5V; HBM ESD rating 2kV