Features: ` Open Drain Power-On Reset With 220-ms Delay (TPS771xx)
` Open Drain Power-Good (PG) Status Output (TPS772xx)
` 150-mA Low-Dropout Voltage Regulator
` Available in 1.5-V, 1.8-V, 2.7-V, 2.8-V, 3.3-V,5.0-V Fixed Output and Adjustable Versions
` Dropout Voltage Typically 115 mV at 150 mA (TPS77133, TPS77233)
` Ultralow 92-A Quiescent Current (Typ)
` 8-Pin MSOP (DGK) Package
` Low Noise (55 Vrms) Without External Filter (Bypass) Capacitor (TPS77118,TPS77218)
` 2% Tolerance Over Specified Conditions for Fixed-Output Versions
` Fast Transient Response
` Thermal Shutdown Protection Pinout
SpecificationsInput voltage range, VI, (see Note 1) . . . . . . . . . . . . . . . . . . 0.3 V to 13.5 V
Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 16.5 V
Maximum RESET voltage (TPS771xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Maximum PG voltage (TPS772xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Continuous total power dissipation . . . . . . . . . .. See Dissipation Rating Table
Output voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating virtual junction temperature range, TJ . . . . . . . .40°C to 125°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network terminal ground.DescriptionThe TPS77201 are low-dropout regulators with integrated power-on reset and power good (PG) function respectively. These devices are capable of supplying 150 mA of output current with a dropout of 115 mV (TPS77133, TPS77233). Quiescent current is 92 A at full load dropping down to 1 A when device is disabled. These TPS77201 are optimized to be stable with a wide range of output capacitors including low ESR ceramic (10 F) or low capacitance (1 F) tantalum capacitors. These devices have extremely low noise output performance (55 Vrms) without using any added filter capacitors. TPS77201 are designed to have fast transient response for larger load current changes.
The TPS77201 is offered in 1.5 V, 1.8-V, 2.7-V, 2.8-V, 3.3-V, and 5.0 V fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is 2% over line, load, and temperature ranges. The TPS771xx and TPS772xx families are available in 8-pin MSOP (DGK) packages.
Because the PMOS device TPS77201 behaves as a low-value resistor, the dropout voltage is very low (typically 115 mV at an output current of 150 mA for 3.3 volt option) 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 92 A over the full range of output current, 0 mA to 150 mA). These two key specifications of TPS77201 yield a significant improvement in operating life for battery-powered systems.
The TPS77201 is enabled when the EN pin is connected to a low-level input 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 A at TJ = 25°C.
The TPS77201 features an integrated power-on reset, commonly used as a supply voltage supervisor (SVS) or reset output voltage. The RESET output of the TPS771xx initiates a reset in DSP, microcomputer or microprocessor systems at power up and in the event of an undervoltage condition. An internal comparator in the TPS77201 monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT eaches 95% of its regulated voltage, RESET will go to a high-impedance state after a 220 ms delay. RESET of TPS77201 will go to low-impedance state when OUT is pulled below 95% (i.e. over load condition) of its regulated voltage.
For the TPS772xx, the power good terminal (PG) is an active high output, which can be used to implement a power-on reset or a low-battery indicator. An internal comparator in the TPS772xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT falls below 82% of its regulated voltage, PG will go to a low-impedance state. PG will go to a high-impedance state when OUT is above 82% of its regulated voltage.
TPS77201 Data Sheet
