2.5-V Fixed-Output Regulator
Very Low-Dropout (LDO) Voltage . . . 57 mV
Typical at IO = 100 mA
Very Low Quiescent Current, Independent
of Load . . . 292 mA Typ
Extremely Low Sleep-State Current,
0.5 mA Max
2% Tolerance Over Specified Conditions
Output Current Range . . . 0 mA to 500 mA
Available in Space Saving 8-Pin SOIC and
20-Pin TSSOP Packages
0°C to 125°C Operating Junction
Temperature Range

description
The TPS71025 low-dropout regulator offers an
order of magnitude reduction in both dropout
voltage and quiescent current over conventional
LDO performance. The improvement results from
replacing the typical pnp pass transistor with a
PMOS device.
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (maximum of 95 mV
at an output current of 100 mA) and is directly proportional to the output current (see Figure 1). Additionally,
since the PMOS pass element is a voltage-driven device, the quiescent current is very low and remains
independent of output loading (typically 292 mA over the full range of output current, 0 mA to 500 mA). These
two key specifications yield a significant improvement in operating life for battery-powered systems. The
TPS71025 also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator,
reducing the quiescent current to 0.5 mA maximum at TJ = 25°C.