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TPS77328DGK Datasheet(PDF) 2 Page - Texas Instruments |
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TPS77328DGK Datasheet(HTML) 2 Page - Texas Instruments |
2 / 23 page TPS77301, TPS77318, TPS77327, TPS77328, TPS77333 WITH RESET OUTPUT TPS77401, TPS77418, TPS77427, TPS77428, TPS77433 WITH POWER GOOD OUTPUT 250-mA LDO REGULATORS WITH INTEGRATED RESET OR PG SLVS281A – FEBRUARY 2000 – REVISED MARCH 2000 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description (continued) Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 200 mV at an output current of 250 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 µA over the full range of output current, 0 mA to 250 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. The device 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 µA at TJ = 25°C. The TPS773xx features an integrated power-on reset, commonly used as an supply voltage supervisor (SVS), or reset output voltage. The RESET output of the TPS773xx 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 TPS773xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT reaches 95% of its regulated voltage, RESET will go to a high-impedance state after a 220 ms delay. RESET will go to low-impedance state when OUT is pulled below 95% (i.e. over load condition) of its regulated voltage. For the TPS774xx, 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 TPS774xx 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. AVAILABLE OPTIONS TJ OUTPUT VOLTAGE (V) PACKAGED DEVICES J TYP MSOP (DGK) 3.3 TPS77333DGK TPS77433DGK 2.8 TPS77328DGK TPS77428DGK – 40 °Cto125°C 2.7 TPS77327DGK TPS77427DGK –40 C to 125 C 1.8 TPS77318DGK TPS77418DGK Adjustable 1.5 V to 5.5 V TPS77301DGK TPS77401DGK The TPS77301 and TPS77401 are programmable using an external resistor divider (see application information). The DGK package is available taped and reeled. Add an R suffix to the device type (e.g., TPS77301DGKR). |
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