AIC1730_15 Datasheet, PDF (9/12 Pages) Analog Intergrations Corporation – 150mA, Low Noise, Low Dropout Linear Regulator

AIC1730
„ PIN DESCRIPTIONS
PIN 1 : VIN - Power supply input pin. Bypass
with a 1μF capacitor to GND
PIN 2 : GND - Ground pin.
PIN 3 : SHDN - Active-Low shutdown input pin.
PIN 4 : BP - Noise bypass pin. An external
bypass capacitor connecting to
BP pin to reduce noises at the
output.
PIN 5 : VOUT - Output pin. Sources up to 150
mA.
„ DETAILED DESCRIPTION OF TECHNICAL TERMS
DROPOUT VOLTAGE (V_DROP)
The dropout voltage is defined as the difference
between the input voltage and output voltage at
which the output voltage drops 100mV. Below
this value, the output voltage will fall as the input
voltage reduces. It depends on the load current
and junction temperature.
LINE REGULATION
Line regulation is the ability of the regulator to
maintain a constant output voltage as the input
voltage changes. The line regulation is specified
as the input voltage changes from V_IN = V_OUT + 1V
to V_IN = 8V and I_OUT = 1mA.
LOAD REGULATION
Load regulation is the ability of the regulator to
maintain a constant output voltage as the load
current changes. A pulsed measurement with an
input voltage set to V_IN = V_OUT + V_DROP can
minimize temperature effects. The load regulation
is specified by the output current ranging from
0.1mA to 150mA.
QUIESCENT CURRENT (I_Q)
Quiescent current is the current flowing through
ground pin with no output load.
GROUND CURRENT (I_GND)
Ground current is the current flowing through the
ground pin with output load.
STANDBY CURRENT (I_STBY)
Standby current is the current flowing into the
regulator when the output is shutdown by setting
V SHDN at 0V and V_IN at 8 V.
CURRENT LIMIT (I_IL)
Current limiting of AIC1730 monitors and controls
the maximum output current, in case of a shorted
output. It protects device from the damage
resulting from any unexpected current.
THERMAL PROTECTION
Thermal sensor protects device when the
junction temperature exceeds T_J= +155ºC. It
signals shutdown logic, turning off pass transistor
and allowing IC to cool down. After the IC’s
junction temperature cools by 20ºC, the thermal
sensor will turn the pass transistor back on.
Thermal protection is designed to protect the
device in the event of fault conditions. For a
continuous operation, do not exceed the absolute
maximum junction-temperature rating of T_J=
150ºC, or damage may occur to the device.
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