1FEATURES
• 100-mA Low-Dropout Regulator
• Available in Adjustable Versions
• Only 335-μA Quiescent Current With 100 mA
at 210°C
• 1-μA Quiescent Current in Standby Mode
• Dropout Voltage Typically 71 mV at 100 mA
• Over Current Limitation

APPLICATIONS
• Down-Hole Drilling
• High Temperature Environments

SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Extreme (–55°C/210°C)
Temperature Range (1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
• Texas Instruments' high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended
temperatures.

DESCRIPTION
The TPS76901 low-dropout (LDO) voltage regulator offers the benefits of low dropout voltage, ultralow-power
operation, and miniaturized packaging. This regulator features low dropout voltages and ultralow quiescent
current compared to conventional LDO regulators. The TPS76901 is ideal for micropower operations and where
board space is at a premium.
A combination of new circuit design and process innovation has enabled the usual PNP pass transistor to be
replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the
dropout voltage is very low, and is directly proportional to the load current. Since the PMOS pass element is a
voltage-driven device, the quiescent current is ultralow (28 μA maximum) and is stable over the entire range of
output load current (0 mA to 100 mA). Intended for use in portable systems such as laptops and cellular phones,
the ultralow-dropout voltage feature and ultralow-power operation result in a significant increase in system
battery operating life.
The TPS76901 also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current
to 1 μA, typical at TJ = 25°C. The TPS76901 is a variable version programmable over the range of 1.2 V to
4.5 V).