1FEATURES
2• Accuracy: 1.5% (typ)
• Low IQ: 100 μA (max)
– 500x Lower Than Standard 1117 Devices
• VIN: 2.0 V to 5.5 V
– Absolute Maximum VIN: 6.0 V
• Stable with 0-mA Output Current
• Low Dropout: 455 mV at 1 A for VOUT = 3.3 V
• High PSRR: 65 dB at 1 kHz
• Minimum Ensured Current Limit: 1.1 A
• Stable with Cost-Effective Ceramic Capacitors:
– With 0-Ω ESR
• Temperature Range: –40°C to +125°C
• Thermal Shutdown and Overcurrent Protection
• Available Package: SOT223
– See the Package Option Addendum at the
end of this document for a complete list of
available voltage options.

APPLICATIONS
• Set Top Boxes
• TVs and Monitors
• PC Peripherals, Notebooks, and Motherboards
• Modems and Other Communication Products Cost•
Switching Power-Supply Post-Regulation

DESCRIPTION
The TLV1171 low-dropout (LDO) linear regulator is a
low input voltage version of the popular 1117 voltage
regulator.
The TLV1171 is an extremely low-power device that
consumes 500x lower quiescent current than the
traditional 1117 voltage regulator, making the
TLV1171 suitable for applications that mandate very
low standby current. The TLV1171 LDO is also stable
with 0 mA of load current; there is no minimum load
requirement, making the device an ideal choice for
applications where the regulator is required to power
very small loads during standby in addition to large currents on the order of 1 A during normal operation.
The TLV1171 offers excellent line and load transient
performance, resulting in very small magnitude output
voltage undershoots and overshoots when the load
current requirement changes from less than 1 mA to
more than 500 mA.
A precision band gap and error amplifier provides
1.5% accuracy. A very high power-supply rejection
ratio enables the device to be used for postregulation
after a switching regulator. Other valuable
features include low output noise and low-dropout
voltage.
The device is internally compensated to be stable
with 0-Ω equivalent series resistance (ESR)
capacitors. These key advantages enable the use of
cost-effective, small-size ceramic capacitors. Cost•
effective capacitors that have higher bias voltages
and temperature derating can also be used if desired.
The TLV1171 is available in a SOT223 package. For
alternate pin outs of the device, refer to the
TLV1117LV.