SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO
DESCRIPTION
The UTC LR9272 is a typical LDO (linear regulator) with the
features of high output voltage accuracy, low supply current, low
ON-resistance, super low dropout, 1A output current capability, and
high ripple rejection.
During operation of the UTC LR9272, the dropout voltage is
very low, Even the output voltage is set at 1.5V, on resistance of
internal FET is typically 0.32Ω. Therefore, applications that require
a large current at small dropout are suitable for the UTC LR9272
series. Low input voltage is acceptable and low output voltage can
be set. The minimum input voltage is 1.4V, and the lowest set
output voltage is 0.8V, and the response of line transient and load
transient are very well.
Internally, there’re many functions of UTC LR9272 which can
be seen in the block figure. There are a voltage reference unit, an
error amplifier, resistor-net for voltage setting, a current limit circuit,
and a chip enable circuit in each UTC LR9272.
The UTC LR9272 can be used as an ideal of the power supply
for hand-held communication equipment, such as: power source for
portable communication equipment, power source for electrical
appliances, for example, cameras, VCRs and camcorders and
power source for battery-powered equipment. |
