TPS79028

` 50-mA Low-Dropout Regulator
` Available in 1.5-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V
` Output Noise Typically 56 VRMS (TPS79030)
`  Only 17 A Quiescent Current at 50 mA
`  1 A Quiescent Current in Standby Mode
`  Dropout Voltage Typically 57 mV at 50 mA (TPS79030)
`  Over Current Limitation
`  40 to 125 Operating Junction Temperature Range
`  5-Pin SOT-23 (DBV) Package

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Input voltage range ( see Ntoe 1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 13.5 V
Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.3 V to V_I + 0.3 V
Voltage on OUT, FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating virtual junction temperature range, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . .  40 to 150
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 to 150

† 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 ground terminal.

The TPS79028 low-dropout (LDO) voltage regulators offers the benefits of low-dropout voltage, ultralow-power operation,low-output noise, and miniaturized packaging.

These regulators TPS79028 feature low-dropout voltages and ultralow quiescent current compared to conventional LDO regulators. An internal resistor, in conjunction with an external bypass capacitor, creates a low-pass filter to reduce the noise. The TPS79030 exhibits only 56 VRMS of output voltage noise using 0.01 F bypass and 10 F output capacitors. Offered in a 5-terminal small outline integrated-circuit SOT-23 package, the TPS79028 devices are ideal for micropower operations, low output noise, and where board space is limited.

The usual PNP pass transistor of TPS79028 has been replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low, typically 57 mV at 50 mA of load current (TPS79030), and is directly proportional to the load current. The quiescent current is ultralow (17 A typically) and is stable over the entire range of output load current (0 mA to 50 mA). Intended for use in portable systems such as laptops and cellular phones, the ultralow-dropout voltage of TPS79028 feature and ultralowpower operation result in a significant increase in system battery operating life.